Battery module and energy storage device

Abstract

The embodiment of the invention relates to the field of energy storage, and provides a battery module and an energy storage device.The battery module can comprise a battery cell assembly which comprises N battery cells; the CCS assembly is fixed on the top surface of the battery cell assembly, the CCS assembly comprises an isolation plate, and N isolation grooves are formed in the isolation plate; the output connector is positioned on one side of the battery cell assembly; one sampling connecting line is electrically connected with the output connector and one battery cell, and the sampling connecting lines are fixed in the isolation grooves; and the module cover plate is fixed on the surface of the CCS assembly, the module cover plate is provided with a concave part, and the concave part is used for fixing an output connecting wire of the adjacent battery module, so that the reliability of the battery module can be improved.

Description

[0001] Cross-reference to related applications

[0002] This application is a divisional application of Chinese invention patent application filed on May 19, 2025, with application number 2025106484707 and invention title "Battery Module and Energy Storage Device". Technical Field

[0003] This disclosure relates to the field of energy storage, and in particular to a battery module and an energy storage device. Background Technology

[0004] Energy storage systems typically involve first combining multiple battery cells into a single battery module, then connecting these modules in series and parallel within the entire battery pack, installing electrical components and structural fasteners, and finally mounting the battery pack onto a battery rack to form a complete battery cluster, thus creating the entire energy storage system.

[0005] Battery modules are electrically connected to each other via copper busbars. Numerous wiring harnesses are also present within the battery modules for electrical connections and signal transmission, typically passing through the gaps between them. To allow the battery cells to occupy more space, thus enabling the battery modules to have higher current carrying capacity and greater integration, the gaps between battery modules may be smaller. Excessively small gaps can lead to inconvenient wiring or electromagnetic interference between adjacent wirings. Summary of the Invention

[0006] This disclosure provides a battery module and an energy storage device, which can at least improve the problem of inconvenient wiring in the battery module.

[0007] According to some embodiments of this disclosure, one aspect of this disclosure provides a battery module, including: a cell assembly comprising N cells; a CCS assembly fixed to the top surface of the cell assembly, the CCS assembly comprising: an isolation plate having N isolation slots; an output connector located on one side of the cell assembly; multiple sampling connection lines, one of which is electrically connected to the output connector and one of the cells, and the sampling connection line is fixed within the isolation slots; and a module cover fixed to the surface of the CCS assembly, the module cover having a recess for fixing the output connection lines of adjacent battery modules.

[0008] In some embodiments, the module cover further includes: at least one partition, the partition being located within the recess, dividing the recess into a plurality of spaced-apart sub-recesses.

[0009] In some embodiments, the isolation plate further includes a snap-fit ​​groove, which is opposite to the recess and is used to snap into the recess.

[0010] In some embodiments, the battery cell is provided with an explosion-proof valve, and the snap-fit ​​groove is directly opposite the explosion-proof valve.

[0011] In some embodiments, the battery module further includes a mica plate, which is opposite to the explosion-proof valve and located between the snap-fit ​​groove and the recess.

[0012] In some embodiments, the CCS component further includes: a plurality of first wire bundle structures, the first wire bundle structures and the isolation groove forming a first receiving space, and a sampling connection line fixed in a first receiving space.

[0013] In some embodiments, it further includes: at least one second wire structure, the second wire structure being located in the recess, the second wire structure and the recess forming a second receiving space, and a second receiving space fixing one of the output connection lines.

[0014] In some embodiments, the isolation plate is further provided with a plurality of anchoring grooves, and the module cover plate is provided with a plurality of anchoring protrusions, wherein one of the anchoring protrusions is directly opposite to one of the anchoring grooves.

[0015] In some embodiments, the anchoring groove is T-shaped, and an anchoring platform is provided at the junction of the recesses in different directions of the anchoring groove, and the anchoring protrusion engages with the anchoring platform.

[0016] In some embodiments, the battery module further includes a baffle for covering the recess.

[0017] According to some embodiments of this disclosure, another aspect of this disclosure also provides an energy storage device, including: a housing having a receiving space therein; a plurality of battery modules as described above, the battery modules being located within the receiving space; and a battery management unit, wherein the output connector of each battery module is electrically connected to the battery management unit via the output connection line.

[0018] In some embodiments, there are multiple battery modules arranged in an array. Among the multiple battery modules arranged in a row, the output connection lines of the battery modules away from the battery management unit are fixed in the recesses of the battery modules close to the battery management unit.

[0019] In some embodiments, the recess of one of two adjacent battery modules arranged in a row is directly opposite the output connector of the other battery module.

[0020] In some embodiments, along the battery module arrangement direction, the module cover of some of the battery modules further includes: at least one partition, the partition being located within the recess, dividing the recess into a plurality of mutually spaced sub-recesses, wherein among the n battery modules arranged in a row, the number of partitions of the battery module closest to the battery management unit is n-2, the number of partitions of different battery modules is in an arithmetic sequence with a common difference of 1, and the number of partitions is an integer greater than or equal to 1.

[0021] In some embodiments, the module cover of a portion of the battery module further includes: at least one partition, the partition being located within the recess, dividing the recess into a plurality of spaced-apart sub-recesses, wherein in the n battery modules arranged in a row, the number of partitions on each battery module is n-2, and the number of partitions is an integer greater than or equal to 1.

[0022] The technical solution provided by this disclosure has at least the following advantages: Within the same battery module, the sampling connection line is fixed in the isolation groove, and the isolation groove provides routing space for the sampling connection line of the same battery module, which can improve the space utilization rate within the battery module. A module cover plate is also provided on the top of the battery module, and the module cover plate has a recessed part. The output connection line in the adjacent battery module can be fixed on the module cover plate, so that the routing between adjacent battery modules is separated by the module cover plate. While providing routing space for adjacent battery modules, the routing between adjacent battery modules is also separated, thereby improving the electromagnetic interference phenomenon between adjacent battery modules. Attached Figure Description

[0023] One or more embodiments are illustrated by way of example with corresponding pictures in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Unless otherwise stated, the pictures in the accompanying drawings do not constitute a limitation on scale. In order to more clearly illustrate the technical solutions in the embodiments of this disclosure or the conventional technology, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is an exploded view of a battery module provided in an embodiment of this disclosure;

[0025] Figure 2 This is a schematic diagram of the structure of a CCS component provided in one embodiment of the present disclosure;

[0026] Figure 3 This is a schematic diagram of the structure of an isolation plate provided in one embodiment of the present disclosure;

[0027] Figure 4 This is a partial structural schematic diagram of a module cover provided in an embodiment of the present disclosure;

[0028] Figure 5 This is a schematic diagram of the overall structure of a module cover provided in one embodiment of the present disclosure;

[0029] Figure 6 This is a schematic diagram of the structure of a battery module provided in one embodiment of the present disclosure;

[0030] Figure 7 This is a schematic diagram of the structure of an energy storage device provided in an embodiment of the present disclosure. Detailed Implementation

[0031] As can be seen from the background technology, in the current process of wiring battery modules, in order to integrate the output connection lines of multiple battery modules onto the battery management unit, the wiring of the later battery module often passes through the previous battery module. This results in a small spacing between adjacent wirings within the previous battery module. On the one hand, this leads to insufficient wiring space, which is not conducive to wiring installation. On the other hand, even if wiring is forced, electromagnetic interference may exist between the output connection line and the sampling connection line.

[0032] In this embodiment, within the same battery module, the sampling connection line is fixed in an isolation groove. The isolation groove provides routing space for the sampling connection line of the same battery module, which can improve the space utilization within the battery module. A module cover plate is also provided on the top of the battery module. The module cover plate has a recessed portion, and the output connection lines in adjacent battery modules can be fixed on the module cover plate, so that the routing between adjacent battery modules is spaced apart by the module cover plate. While providing routing space for adjacent battery modules, it also separates the routing of adjacent battery modules, thereby improving the electromagnetic interference phenomenon between adjacent battery modules.

[0033] In the description of the embodiments of this disclosure, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary or secondary relationship of the indicated technical features. In the description of the embodiments of this disclosure, "a plurality of" means two or more, unless otherwise explicitly defined.

[0034] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this disclosure. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0035] In the description of the embodiments of this disclosure, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A exists, A and B exist simultaneously, and B exists. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0036] In the description of the embodiments of this disclosure, the term "multiple" refers to two or more (including two), similarly, "multiple groups" refers to two or more (including two groups), and "multiple pieces" refers to two or more (including two pieces).

[0037] In the description of the embodiments of this disclosure, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this disclosure and simplifying the description, and are not intended to 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 the embodiments of this disclosure.

[0038] In the description of the embodiments of this disclosure, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0039] In the accompanying drawings corresponding to the embodiments of this disclosure, the thickness and area of ​​the layers are enlarged for better understanding and ease of description. When describing a component (such as a layer, film, region, or substrate) on or on the surface of another component, the component may be "directly" located on the surface of the other component, or there may be a third component between the two components. Conversely, when describing a component on the surface of another component, or when another component is formed or disposed on the surface of a component, it indicates that there is no third component between the two components. Furthermore, when describing a component as being "generally" formed on another component, it means that the component is not formed on the entire surface (or front surface) of the other component, nor is it formed on a portion of the edge of the entire surface.

[0040] In the description of embodiments of this disclosure, when a component "includes" another component, other components are not excluded unless otherwise stated, and may be further included. Furthermore, when a component such as a layer, film, region, or plate is referred to as being "on / located" on another component, it can be "directly" on the other component (i.e., located on the surface of the other component with no other components between them), or another component may be present therein. Additionally, when a component such as a layer, film, region, or plate is "directly located" on another component, or when a component such as a layer, film, region, or plate is located on the surface of another component, it indicates that no other components are located therein.

[0041] The terminology used in the description of the various embodiments herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used in the description of the various embodiments and the appended claims, the term "component" is also intended to include the plural form unless the context clearly indicates otherwise. Components include layers, films, regions, or plates, etc.

[0042] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the embodiments of this disclosure to facilitate a better understanding of the disclosure. However, the technical solutions claimed in this disclosure can be implemented even without these technical details and various variations and modifications based on the following embodiments.

[0043] refer to Figures 1 to 6 , Figure 1 This is an exploded view of a battery module provided in an embodiment of this disclosure; Figure 2 This is a schematic diagram of the structure of a CCS component provided in one embodiment of the present disclosure; Figure 3 This is a schematic diagram of the structure of an isolation plate provided in one embodiment of the present disclosure; Figure 4 This is a partial structural schematic diagram of a module cover provided in an embodiment of the present disclosure; Figure 5 This is a schematic diagram of the overall structure of a module cover provided in one embodiment of the present disclosure; Figure 6 This is a schematic diagram of the structure of a battery module provided in one embodiment of the present disclosure.

[0044] In some embodiments, the battery module may include: a cell assembly 100, which includes N cells 110.

[0045] The battery module may also include: a CCS assembly 101, which is fixed on the top surface of the cell assembly 100. The CCS assembly 101 includes: an isolation plate 111, which includes N rows of grooves, each groove exposing the top surface of the cell 110. The isolation plate 111 is also provided with N isolation slots 121 and series aluminum bars 131, which are located in the grooves and used to connect adjacent cells 110 in series.

[0046] The battery module may also include an output connector 102, which is located on one side of the cell assembly 100.

[0047] The battery module may also include: multiple sampling connection lines 103, one sampling connection line 103 being electrically connected to the output connector 102 and a battery cell 110, and the sampling connection line 103 being fixed in the isolation groove 121.

[0048] The battery module may also include: a module cover plate 104, which is fixed to the surface of the CCS component 101. The module cover plate 104 is provided with a recess 114 for fixing the output connection lines of adjacent battery modules.

[0049] In this embodiment, within the same battery module, the sampling connection line 103 is fixed in the isolation groove 121. The isolation groove 121 provides routing space for the sampling connection line 103 of the same battery module, which can improve the space utilization rate within the battery module. A module cover plate 104 is also provided on the top of the battery module. The module cover plate 104 has a recess 114. The output connection lines in adjacent battery modules can be fixed on the module cover plate 104, so that the routing between adjacent battery modules is separated by the module cover plate 104. While providing routing space for adjacent battery modules, the routing of adjacent battery modules is also separated, thereby improving the electromagnetic interference phenomenon between adjacent battery modules.

[0050] The number of cells 110 in the cell assembly 100 can be selected according to the output power required by the battery module. The higher the output power required by the battery module, the more cells 110 can be.

[0051] The isolation plate 111 in the CCS component 101 is a structure that isolates the battery cell 110 from other structures. The groove in the isolation plate 111 is used to fix the series aluminum bar 131, and the rest covers the top surface of the battery cell 110 that is not covered by the series aluminum bar 131, thereby avoiding the situation where the battery cell 110 is mistakenly connected to other structures and avoiding safety hazards such as short circuits.

[0052] The specific shape of the groove is not limited and can take many forms, such as an arc-shaped groove, a square groove, or an elliptical groove with a notch. In this embodiment, the groove is preferably an arc-shaped groove (the term "arc-shaped groove" should be interpreted broadly, including circular arc grooves, elliptical arc grooves, etc.). Arc-shaped grooves are easy to vacuum-form and demold.

[0053] The series aluminum bar 131 in the CCS component 101 may include: series sub-aluminum bar 141, positive aluminum bar 151, and negative aluminum bar 161. For the cell 110, the cell 110 includes two output ports. The series sub-aluminum bar 141 is used to connect one output port of each of two adjacent cells 110 to connect the two adjacent cells 110 in series. The positive aluminum bar 151 and the negative aluminum bar 161 are respectively connected to one output port of a cell 110 as positive output and negative output.

[0054] Furthermore, taking a battery cell assembly 100 consisting of three cells 110 as an example, the battery cell assembly 100 includes a first cell, a second cell, and a third cell. Each cell 110 includes a positive terminal and a negative terminal. A series sub-bar 141 connects the positive terminal of the first cell and the negative terminal of the second cell, respectively. Another series sub-bar 141 connects the positive terminal of the second cell and the negative terminal of the third cell, respectively. The negative terminal of the first cell is electrically connected to a negative electrode bar 161, and the positive terminal of the third cell is electrically connected to a positive electrode bar 151, serving as the positive and negative outputs, respectively. It can be understood that when the battery cell assembly 100 has other numbers of cells 110, the connection order can be deduced sequentially according to the above logic.

[0055] refer to Figures 1 to 3 In some embodiments, the CCS component 101 further includes: a plurality of first wire bundle structures 171, the first wire bundle structures 171 and the isolation groove 121 forming a first receiving space, the first receiving space fixing a sampling connection line 103. The first wire bundle structures 171 are used to fix the sampling connection line 103, thereby preventing the sampling connection line 103 from moving in the battery module, thereby preventing the sampling connection line 103 from getting tangled together, and the first wire bundle structures 171 can also facilitate the installation of the sampling connection line 103, thereby improving the reliability and aesthetics of the battery module.

[0056] In some embodiments, one end of the first wire bundle structure 171 is fixed to the isolation plate 111, and the other end can move toward the isolation plate 111 and away from the isolation plate 111. The movable other end makes it easier to fix the sampling connection line 103 to the CCS component 101, thereby improving the convenience of the first wire bundle structure 171.

[0057] In other embodiments, the first wire bundle structure 171 can be integrated with the isolation plate 111. During the installation of the sampling connection line 103, the sampling connection line 103 can be fixed by directly passing it through the first accommodating space between the first wire bundle structure 171 and the isolation plate 111.

[0058] In some embodiments, the output connector 102 cooperates with the sampling connection line 103 to collect the sampling results of multiple cells 110. In some embodiments, the output connector 102 is also connected to an output connection line, which is electrically connected to the battery management unit of the battery module, and the battery management unit outputs the sampling results corresponding to the cells.

[0059] For different battery modules, the sampling signals output by each battery module are all output through the output connection line.

[0060] In some embodiments, the battery cell 110 includes terminals, a series aluminum bar 131 is electrically connected to the terminals of the battery cell, and a sampling connection line 103 is electrically connected to the series aluminum bar 131. The corresponding signal is obtained by electrically connecting the aluminum bar to the terminals. The terminals can be set to a structure such as a thin strip to make the distance between adjacent terminals longer, which is beneficial for electrical connection with the series aluminum bar 131.

[0061] In some embodiments, the module cover 104 may be a metal cover to cover the sampling connection line 103, thereby forming a sealed space through the module cover 104 and the CCS assembly 101, which can improve the insulation of the sampling connection line 103 and the output connection line and improve the electromagnetic interference problem of the sampling connection line 103 and the output connection line.

[0062] In some embodiments, the module cover 104 is a metal cover, and an insulating component is provided between the CCS assembly 101 and the module cover 104 to isolate the CCS assembly 101 from the module cover 104.

[0063] refer to Figure 3 and Figure 4 In some embodiments, the module cover 104 further includes at least one partition 124 located within the recess 114, dividing the recess 114 into a plurality of spaced-apart sub-recesses 134. The partition 124 divides the recess 114 into multiple sub-recesses 134, thereby separating the output connection lines of different battery modules and facilitating the installation of different output connection lines.

[0064] In some embodiments, the width of different sub-recesses 134 can be set to be the same as the wire diameter of the output connection line, so that the output connection line can be directly clipped into the recess 114, thereby eliminating the need for additional wire harness design, reducing the material and cost of the module cover 104, and also reducing the structural complexity of the module cover 104.

[0065] refer to Figure 4 and Figure 7 , Figure 7 This is a schematic diagram of a second wire bundle structure fixed to a module cover plate according to an embodiment of the present disclosure.

[0066] In some embodiments, the battery module further includes at least one second wire harness structure 106, the second wire harness structure 106 being located in the recess 114, the second wire harness structure 106 and the recess 114 forming a second receiving space, and an output connection wire being fixed in the second receiving space. The second wire harness structure 106 can fix the output connection wire, thereby preventing the output connection wire from moving freely within the battery module, facilitating the installation of the output connection wire, and improving the reliability and aesthetics of the battery module.

[0067] In some embodiments, one end of the second wire harness structure 106 is fixed to the module cover plate 104, and the other end can move toward the module cover plate 104 and away from the module cover plate 104. The movable other end makes it easier to fix the output connection wire to the module cover plate 104, thereby improving the convenience of the second wire harness structure 106.

[0068] In other embodiments, the second wire harness structure 106 can be an integral structure with the module cover plate 104. During the installation of the output connection cable, the output connection cable can be fixed by directly passing it through the second receiving space between the second wire harness structure 106 and the module cover plate 104.

[0069] In some embodiments, the recess 114 includes a plurality of spaced-apart sub-recesses 134, and there may be a plurality of second wire harness structures 106 located within the battery module. Each sub-recess 134 is provided with a corresponding second wire harness structure 106, thereby fixing the output connection wires within each sub-recess 134 and improving the reliability of the battery module.

[0070] In some embodiments, the recess 114 includes a plurality of spaced-apart sub-recesses 134, and the second wire harness structure 106 located within the battery module can be a single structure. The second wire harness structure 106 and the different sub-recesses 134 form a plurality of second receiving spaces, thereby fixing a plurality of output connection wires within the battery module.

[0071] In some embodiments, the top surface of the partition 124 may be lower than the top surface of the module cover 104. Combined with the second wire harness structure 106, the second wire harness structure 106 can be prevented from protruding from the top surface of the battery module, thereby improving the reliability of the battery module.

[0072] Continue to refer to Figures 1 to 3 In some embodiments, the separator 111 further includes a snap-fit ​​groove 201, which faces the recess 114 and is used to snap into the recess 114. By using the snap-fit ​​groove 201 and the recess 114 facing each other, the separator 111 can be embedded into the CCS assembly 101, while also preventing the module cover 104 from protruding from the top surface of the battery module, thereby making the surface of the battery module flat.

[0073] refer to Figure 1 and Figure 6 In some embodiments, the battery cell 110 is provided with an explosion-proof valve, and the snap-fit ​​groove 201 is directly opposite the explosion-proof valve. For the battery cell, the explosion-proof valve is located in the middle of the battery cell 110. By setting the snap-fit ​​groove 201 directly opposite the explosion-proof valve, the corresponding position of the snap-fit ​​groove 201 can be set in the middle of the battery cell 110. The recess 114 of the corresponding module cover plate 104 is also located in the middle of the battery cell. In this way, the output connection wires can be bent during the assembly of different battery modules, thereby improving the reliability of the assembled battery modules as energy storage devices.

[0074] The explosion-proof valve is used to open when the gas pressure inside the battery cell 110 is too high, thereby releasing the gas inside the battery cell 110 and preventing the battery cell 110 from exploding.

[0075] In some embodiments, the battery module further includes a mica plate 107, which faces the explosion-proof valve and is located between the snap-fit ​​groove and the recess 114. The mica plate 107 isolates the explosion-proof valve from the module cover plate 104, thereby utilizing the mica plate 107 for heat dissipation and achieving the purpose of heat insulation.

[0076] In other embodiments, the explosion-proof valve can be installed on the bottom or side of the battery cell 110, thereby reducing the need for the mica plate 107 and thus reducing costs.

[0077] refer to Figure 3 and Figure 5In some embodiments, the isolation plate 111 is further provided with a plurality of anchoring grooves 181, and the module cover plate 104 is provided with a plurality of anchoring protrusions 144, with one anchoring protrusion 144 facing an anchoring groove 181. On the one hand, the cooperation between the anchoring grooves 181 and the anchoring protrusions 144 can facilitate the positioning between the CCS component 101 and the module cover plate 104. On the other hand, the anchoring grooves 181 and the anchoring protrusions 144 can also snap the CCS component 101 and the module cover plate 104 together, thereby completing the installation of the module cover plate 104. Moreover, the module cover plate 104 can be pre-snapped onto the CCS component 101, which can facilitate the fixation of the module cover plate 104.

[0078] In some embodiments, the aperture at the top of the anchoring groove 181 may be smaller than the diameter at the end of the anchoring protrusion 144. The end of the anchoring protrusion 144 may have a certain elastic deformation capability. During the process of engaging the anchoring groove 181 and the anchoring protrusion 144, the two are squeezed against each other, and the end of the anchoring protrusion 144 deforms, reducing its diameter, so that the end of the anchoring protrusion 144 can penetrate into the interior of the anchoring groove 181. Afterward, the end of the anchoring protrusion 144 recovers its deformation, so that the anchoring protrusion 144 and the anchoring groove 181 will not detach arbitrarily, thereby completing the engagement and fixation between the anchoring protrusion 144 and the anchoring groove 181.

[0079] In some embodiments, the anchoring groove 181 is T-shaped, and an anchoring platform 191 is provided at the junction of the recesses in different directions of the anchoring groove 181. The anchoring protrusion 144 engages with the anchoring platform 191. Positioning the anchoring platform 191 at the junction of the recesses in different directions of the anchoring groove 181 allows the stress on the anchoring platform 191 to be distributed throughout the anchoring groove 181 during the assembly of the anchoring platform 191 and the anchoring protrusion 144. This reduces the possibility of excessive deformation of the anchoring groove 181 during use, which could lead to malfunctions. Furthermore, the junction is a location where the reliability of the anchoring groove 181 is relatively high, and placing the anchoring platform 191 at the junction location can also improve the reliability of the battery module.

[0080] In some embodiments, the battery module may further include a baffle (not shown) for covering the recess 114. Covering the recess 114 with the baffle can prevent dust or other debris from falling into the recess 114 when the output connection wire is fixed in the recess 114, thereby further improving the reliability of the battery module.

[0081] In some embodiments, the top surface of the baffle can be flush with the top surface of the module cover 104, thereby preventing the baffle from protruding from the module cover 104, which can improve the overall aesthetics of the battery module and avoid the battery module needing to occupy additional installation space during the assembly of the energy storage device, thereby improving the space utilization rate of the energy storage device in the future.

[0082] In this embodiment, within the same battery module, the sampling connection line 103 is fixed in the isolation groove 121. The isolation groove 121 provides routing space for the sampling connection line 103 of the same battery module, which can improve the space utilization rate within the battery module. A module cover plate 104 is also provided on the top of the battery module. The module cover plate 104 has a recess 114. The output connection lines in adjacent battery modules can be fixed on the module cover plate 104, so that the routing between adjacent battery modules is separated by the module cover plate 104. While providing routing space for adjacent battery modules, the routing of adjacent battery modules is also separated, thereby improving the electromagnetic interference phenomenon between adjacent battery modules.

[0083] Another embodiment of this disclosure also provides an energy storage device, which may include the battery module in some or all of the above embodiments. The energy storage device provided in another embodiment of this disclosure will be further described below with reference to the accompanying drawings. It should be noted that the same or corresponding parts as those in the above embodiments can be referred to the above embodiments, and will not be repeated below.

[0084] refer to Figure 1 , Figure 4 and Figure 7 , Figure 7 This is a schematic diagram of the structure of an energy storage device provided in an embodiment of the present disclosure.

[0085] In some embodiments, the energy storage device may include a housing having an internal receiving space.

[0086] The energy storage device may also include: a plurality of battery modules 10 as described in some or all of the above embodiments, wherein the battery modules 10 are located within the accommodating space.

[0087] The energy storage device may also include a battery management unit 200, wherein the output connector 102 of each battery module 10 is electrically connected to the battery management unit 200 via an output connection line 105.

[0088] For each battery module 10, the sampling connection line 103 of each battery module 10 is first connected to the output connector 102, and then connected to the output connector 102 and the battery management unit 200 respectively through the output connection line 105. In this way, the sampling signals of all battery modules 10 are collected into the battery management unit 200, and the overall sampling signal is output through the battery management unit 200.

[0089] For sampling connection line 103 and output connection line 105, the wire diameter of sampling connection line 103 is usually smaller than that of output connection line 105. This is because sampling connection line 103 is only responsible for outputting the sampling signal of one cell 110, while output connection line 105 is responsible for the sampling signal of the entire battery module 10.

[0090] The sampling connection line 103 typically includes a metal wire and an insulating sheath wrapped around the surface of the metal wire. Similarly, the output connection line 105 also includes a metal wire and an insulating sheath wrapped inside the metal wire. The difference is that the number of metal wires in the output connection line 105 is greater than the number of metal wires in the sampling connection line 103, and the thickness of the insulating sheath in the output connection line 105 is greater than the thickness of the insulating sheath. In related technologies, the wiring of different battery modules 10 is usually routed inside the battery module 10. Due to the large number of metal wires in the output connection line 105, the electromagnetic interference generated is large. At the same time, the insulating sheath of the sampling connection line 103 is thin, which makes it easy for the output connection line 105 to interfere with the sampling connection line 103. When the distance between the output connection line 105 and the sampling connection line 103 is too close, it may cause the signal on the sampling connection line 103 to be inaccurate. The embodiments of this disclosure separate the different sampling connection lines 103 and the output connection line 105, thereby facilitating wiring while avoiding mutual interference between the sampling connection line 103 and the output connection line 105.

[0091] In some embodiments, there are multiple battery modules 10, and the multiple battery modules 10 are arranged in an array. Among the multiple battery modules 10 arranged in a row, the output connection line 105 of the battery module 10 away from the battery management unit 200 is fixed in the recess 114 of the battery module 10 close to the battery management unit 200.

[0092] For example, two battery modules 10 are arranged in a row. The output connection line 105 of the battery module 10 farther from the battery management unit 200 is fixed in the recess 114 of the battery module 10 closer to the battery management unit 200. This isolates the output connection line 105 of the battery module 10 farther from the battery management unit 200 from the sampling connection line 103 of the battery module 10 closer to the battery management unit 200. On the one hand, this avoids electromagnetic interference between the output connection line 105 and the sampling connection line 103. On the other hand, the sampling connection line 103 is installed using the recess 114. Similarly, when three battery modules 10 are arranged in a row, the three battery modules 10 are defined as the first battery from the direction closer to the battery management unit 200 toward the direction farther from the battery management unit 200. The system comprises a first battery module, a second battery module, and a third battery module. The output connection line 105 of the first battery module is directly electrically connected to the battery management unit 200. The output connection line 105 of the second battery module is installed on the recess 114 of the first battery module, and the output connection line 105 of the third battery module is installed inside the recesses 114 of the first and second battery modules, thereby completing the signal output of the three battery modules 10. Similarly, for the first battery module, the sampling connection line 103 of the first battery module is isolated from the output connection lines 105 of the second and third battery modules. For the second battery module, the sampling connection line 103 of the second battery module is isolated from the output connection line 105 of the third battery module, thereby improving the reliability of the energy storage device.

[0093] It is understood that the above is only an example of the energy storage device including 2 battery modules 10 and 3 battery modules 10. The energy storage device may also include other numbers of battery modules 10. The installation method of other numbers of battery modules 10 can be deduced from the above content, and will not be elaborated here.

[0094] In some embodiments, the recess 114 of one battery module 10 in two adjacent battery modules 10 arranged in a row is directly opposite the output connector 102 of the other battery module 10.

[0095] Similarly, taking two battery modules 10 arranged in a row as an example, the output connector 102 of the battery module 10 farther from the battery management unit 200 is directly opposite the recess 114 of the battery module 10 closer to the battery management unit 200. Therefore, when the output connection line 105 of the battery module 10 farther from the battery management unit 200 is installed in the recess 114 of the battery module 10 closer to the battery management unit 200, bending of the output connection line 105 can be avoided, improving the reliability of the output connection line 105 and preventing abnormal problems caused by bending of the output connection line 105 over a long period of time. At the same time, it can also reduce the cost of the energy storage device, optimize the length of the output connection line 105, reduce unnecessary material waste, and place it above the battery module 10, which is more conducive to automated production line production and reduces production costs.

[0096] Furthermore, by aligning the output connector 102 of the battery module 10 furthest from the battery management unit 200 with the recess 114 of the battery module 10 closest to the battery management unit 200, the spacing between adjacent battery modules 10 can be reduced. If the output connector 102 of the battery module 10 furthest from the battery management unit 200 is misaligned with the recess 114 of the battery module 10 closest to the battery management unit 200, the output connection line 105 will inevitably need to be bent in order to install it in the recess 114. To avoid abnormalities during the bending process, more installation space is required. Therefore, by aligning the output connector 102 of the battery module 10 furthest from the battery management unit 200 with the recess 114 of the battery module 10 closest to the battery management unit 200, the spacing between adjacent battery modules 10 can be reduced, thereby improving the space utilization of the energy storage device.

[0097] In some embodiments, the module cover 104 further includes at least one partition 124 located within the recess 114, dividing the recess 114 into a plurality of mutually spaced sub-recesses 134. Among the n battery modules 10 arranged in a row, the number of sub-recesses 134 of the battery module 10 closest to the battery management unit 200 is n-1. In the direction from the battery management unit 200 to away from the battery management unit 200, the number of sub-recesses 134 of different battery modules 10 is in an arithmetic sequence with a tolerance of 1.

[0098] Taking three battery modules 10 as an example, the three battery modules 10 are defined as a first battery module, a second battery module, and a third battery module, starting from the direction closest to the battery management unit 200 and moving away from the battery management unit 200. The first battery module has two sub-recesses 134, the second battery module has one sub-recesse 134, and the third battery module has zero sub-recesses 134. It can be understood that for the first battery module, the output connection lines 105 of the second and third battery modules will be installed on the first battery module, and the output connection lines 105 of the third battery module will be installed on the second battery module. Based on this, setting the number of sub-recesses 134 of the first battery module to two facilitates the installation of the output connection lines 105 of the second and third battery modules.

[0099] In some embodiments, the module cover 104 further includes at least one partition 124 located within the recess 114, dividing the recess 114 into a plurality of spaced-apart sub-recesses 134. In the n battery modules 10 arranged in a row, each battery module 10 has an equal number of sub-recesses 134, which is n-1. For the battery module 10 closest to the battery management unit 200, the output sampling lines of the other battery modules 10 need to be installed on this battery module 10. Therefore, the number of sub-recesses 134 in the battery module 10 closest to the battery management unit 200 needs to be set to n-1. Simultaneously, to facilitate the production of the module cover 104, the number of sub-recesses 134 on each battery module 10 is set to be equal.

[0100] In this embodiment, the wiring path of the output connection line 105 can be simplified, the space utilization of the energy storage device can be improved, the top space of the battery module 10 can be fully utilized, the output connection line 105 does not need to occupy additional space, the overall layout of the energy storage device is compact, and compared with the wiring method in related technologies, it saves more space. More cells 110 can be arranged in the same space size, which can improve the energy density of the energy storage device.

[0101] Furthermore, separating the sampling connection lines 103 and output connection lines 105 of the row-arranged battery modules 10 by the module cover plate 104 can reduce electromagnetic interference between adjacent battery modules 10 and improve the accuracy and stability of their respective signal transmission. On the other hand, arranging the output connection lines 105 above the battery modules 10 helps to form a natural convection channel (in related technologies, the output connection lines are set between battery modules, and when the battery modules heat up, the output connection lines also release heat). In this embodiment, after the output connection lines are placed above the battery modules, there is more space, which is conducive to heat dissipation. Especially when working in high-temperature environments, it can better maintain the temperature of the battery modules 10 within a reasonable range. The sampling connection lines 103 and output connection lines 105 between the battery modules 10 are separated by the module cover plate 104, and the output connection lines 105 do not directly contact the heat source cell 110, reducing the risk of aging or damage caused by local overheating.

[0102] During the installation of sampling connection line 103 and output connection line 105, the first bundle structure 171 and the second bundle structure 106 are set up so that different connection lines can be arranged according to a predetermined path, making the installation process more standardized and easier to operate, and reducing the possibility of human error.

[0103] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes in form and detail may be made without departing from the spirit and scope of the embodiments of this disclosure. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the embodiments of this disclosure; therefore, the scope of protection of the embodiments of this disclosure should be determined by the scope defined in the claims.

Claims

1. A battery module, characterized in that, include: A battery cell assembly, wherein the battery cell assembly comprises N battery cells; CCS assembly, the CCS assembly is fixed on the top surface of the cell assembly, the CCS assembly includes: an isolation plate, the isolation plate is provided with N isolation slots; An output connector, located on one side of the battery cell assembly; Multiple sampling connection lines, one of which is electrically connected to the output connector and one of the battery cells, and the sampling connection line is fixed in the isolation groove; A module cover plate is fixed to the surface of the CCS assembly. The module cover plate has a recessed portion for fixing the output connection line of the battery module on the same side along the battery module arrangement direction.

2. The battery module according to claim 1, characterized in that, The module cover plate further includes: at least one partition, the partition being located within the recess, dividing the recess into a plurality of spaced-apart sub-recesses.

3. The battery module according to claim 1, characterized in that, The isolation plate also includes a snap-fit ​​groove, which is directly opposite the recessed portion and is used to snap into the recessed portion.

4. The battery module according to claim 3, characterized in that, The battery cell is equipped with an explosion-proof valve, and the snap-fit ​​groove is directly opposite the explosion-proof valve.

5. The battery module according to claim 4, characterized in that, The battery module further includes a mica plate, which is directly opposite the explosion-proof valve and located between the snap-fit ​​groove and the recess.

6. The battery module according to claim 1, characterized in that, The CCS component further includes: a plurality of first wire bundle structures, the first wire bundle structures and the isolation groove forming a first accommodating space, and a sampling connection line fixed in a first accommodating space.

7. The battery module according to claim 1, characterized in that, Also includes: At least one second wire structure is located in the recessed portion, the second wire structure and the recessed portion form a second receiving space, and one of the second receiving spaces fixes one of the output connection lines.

8. The battery module according to claim 1, characterized in that, The isolation plate is also provided with multiple anchoring grooves, and the module cover plate is provided with multiple anchoring protrusions, with one of the anchoring protrusions facing one of the anchoring grooves.

9. The battery module according to claim 8, characterized in that, The anchoring groove is T-shaped, and an anchoring platform is provided at the junction of the recesses in different directions of the anchoring groove. The anchoring protrusion engages with the anchoring platform.

10. The battery module according to claim 1, characterized in that, The battery module further includes a baffle plate for covering the recessed portion.

11. An energy storage device, characterized in that, include: A housing, wherein the housing has an internal receiving space; Multiple battery modules as described in any one of claims 1 to 10, wherein the battery modules are located within the accommodating space; The battery management unit is provided, and the output connector of each battery module is electrically connected to the battery management unit via the output connection line.

12. The energy storage device according to claim 11, characterized in that, The battery module comprises multiple battery modules arranged in an array. Among the multiple battery modules arranged in a row, the output connection line of the battery module furthest from the battery management unit is fixed in the recess of the battery module closest to the battery management unit.

13. The energy storage device according to claim 12, characterized in that, In a row of two adjacent battery modules, the recess of one battery module is directly opposite the output connector of the other battery module.

14. The energy storage device according to claim 12, characterized in that, Along the battery module arrangement direction, the module cover of some of the battery modules further includes: at least one partition, the partition being located within the recess, dividing the recess into a plurality of mutually spaced sub-recesses, wherein among the n battery modules arranged in a row, the number of partitions of the battery module closest to the battery management unit is n-2, the number of partitions of different battery modules is in an arithmetic sequence with a common difference of 1, and the number of partitions is an integer greater than or equal to 1.

15. The energy storage device according to claim 12, characterized in that, The module cover of some of the battery modules further includes: at least one partition, the partition being located within the recess, dividing the recess into a plurality of mutually spaced sub-recesses, wherein in the n battery modules arranged in a row, the number of partitions on each battery module is n-2, and the number of partitions is an integer greater than or equal to 1.

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