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, the isolation plate comprises N rows of groove groups, each groove group comprises a plurality of grooves, each groove exposes the top surface of the battery cell, the isolation plate is further provided with N isolation grooves and series aluminum bars, and the series aluminum bars are located in the grooves and used for connecting adjacent battery cells in series; 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

Technical Field

[0001] The present disclosure relates to the field of energy storage, and particularly to a battery module and an energy storage device. Background Art

[0002] An energy storage system usually first combines multiple battery cells into an entire battery module, then installs multiple battery modules inside an entire battery pack in a series-parallel manner, then installs electrical components and structural fixing components, and finally installs the battery pack on a battery rack to form an entire battery cluster, thereby forming the entire energy storage system.

[0003] The battery modules are electrically connected to each other through copper bars. There are also a large number of wire harnesses in the battery module for electrical connection and signal transmission. The wire harnesses usually pass through the gaps between the battery modules. In order to allow the battery cells to occupy a larger space, so that the battery module has a larger current-carrying capacity and a larger integration degree, the gaps between the battery modules may be smaller. The too-small gaps may cause inconvenient wiring or electromagnetic interference problems between adjacent wiring. Summary of the Invention

[0004] Embodiments of the present disclosure provide a battery module and an energy storage device, which can at least improve the problem of inconvenient wiring in the battery module.

[0005] According to some embodiments of the present disclosure, on the one hand, an embodiment of the present disclosure provides a battery module, including: a battery cell assembly, the battery cell assembly including N battery cells; a CCS assembly, the CCS assembly being fixed on the top surface of the battery cell assembly, the CCS assembly including: a separator plate, the separator plate including N rows of groove groups, each groove group including a plurality of grooves, each groove exposing the top surface of the battery cell, the separator plate further being provided with N isolation grooves, a series aluminum bar, the series aluminum bar being located in the groove for connecting adjacent battery cells in series; an output connector, the output connector being located on one side of the battery cell assembly; a plurality of sampling connection lines, one sampling connection line being electrically connected to the output connector and one battery cell, and the sampling connection line being fixed in the isolation groove; a module cover plate, the module cover plate being fixed on the surface of the CCS assembly, the module cover plate being provided with a recess for fixing the output connection lines of adjacent battery modules.

[0006] In some embodiments, the module cover plate further includes: at least one partition portion, the partition portion being located in the recess and separating the recess into a plurality of sub-recesses spaced from each other.

[0007] In some embodiments, the separator plate further includes a clamping groove, the clamping groove being opposite to the recess for clamping with the recess.

[0008] In some embodiments, an explosion-proof valve is provided on the battery cell, and the clamping groove is aligned with the explosion-proof valve.

[0009] In some embodiments, the battery module further includes: a mica plate, which is aligned with the explosion-proof valve and is located between the clamping groove and the recess.

[0010] In some embodiments, the CCS component further includes: a plurality of first wire-bundling structures, and a first accommodating space is defined between the first wire-bundling structures and the isolation groove, and one sampling connection wire is fixed in one first accommodating space.

[0011] In some embodiments, it further includes: at least one second wire-bundling structure, which is located in the recess, and a second accommodating space is defined between the second wire-bundling structure and the recess, and one output connection wire is fixed in one second accommodating space.

[0012] In some embodiments, a plurality of anchoring grooves are further provided on the isolation plate, and a plurality of anchoring protrusions are provided on the module cover plate, and one anchoring protrusion is aligned with one anchoring groove.

[0013] In some embodiments, the anchoring groove is T-shaped, and an anchoring platform is provided at the intersection of the depressions in different directions of the anchoring groove, and the anchoring protrusion is clamped with the anchoring platform.

[0014] In some embodiments, the battery module further includes: a baffle for covering the recess.

[0015] According to some embodiments of the present disclosure, on the other hand, the present disclosure embodiments further provide an energy storage device, including: a housing having an accommodating space therein; a plurality of the above-mentioned battery modules located in the accommodating space; a battery management unit, and the output connector of each battery module is electrically connected to the battery management unit via the output connection wire.

[0016] In some embodiments, there are a plurality of battery modules, and the plurality of battery modules are arranged in an array. Among the plurality of battery modules arranged in a row, the output connection wire of the battery module far from the battery management unit is fixed in the recess of the battery module close to the battery management unit.

[0017] In some embodiments, the recess of one battery module in two adjacent battery modules arranged in a row is aligned with the output connector of the other battery module.

[0018] In some embodiments, the module cover plate further includes: at least one partition portion located within the recess portion, which divides the recess portion into a plurality of sub-recess portions spaced apart from each other. Among the n battery modules arranged in a row, the number of the sub-recess portions of the battery module closest to the battery management unit is n - 1. In the direction from the battery management unit towards away from the battery management unit, the number of the sub-recess portions of different battery modules forms an arithmetic sequence with a common difference of 1.

[0019] In some embodiments, the module cover plate further includes: at least one partition portion located within the recess portion, which divides the recess portion into a plurality of sub-recess portions spaced apart from each other. Among the n battery modules arranged in a row, the number of the sub-recess portions on each battery module is equal, and all are n - 1.

[0020] The technical solutions provided by the embodiments of the present disclosure have at least the following advantages: within the same battery module, the sampling connection wires are fixed in the isolation grooves, and the isolation grooves are used to provide a routing space for the sampling connection wires of the same battery module, which can improve the space utilization rate within the battery module. A module cover plate is further provided on the top of the battery module, and a recess portion is provided on the module cover plate. The output connection wires 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 a routing space for adjacent battery modules, the routing of adjacent battery modules is also spaced apart, thereby improving the electromagnetic interference phenomenon between adjacent battery modules. Description of the Drawings

[0021] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not constitute a limitation on the embodiments, unless otherwise stated, the figures in the drawings do not constitute a proportional limitation; in order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the following-described drawings are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 An exploded view of a battery module provided by an embodiment of the present disclosure; Figure 2 A structural schematic diagram of a CCS component provided by an embodiment of the present disclosure; Figure 3 A structural schematic diagram of an isolation plate provided by an embodiment of the present disclosure; Figure 4 A partial structural schematic diagram of a module cover plate provided by an embodiment of the present disclosure; Figure 5 Schematic diagram of the overall structure of a module cover plate provided by an embodiment of the present disclosure; Figure 6 Schematic diagram of the structure of a battery module provided by an embodiment of the present disclosure; Figure 7 Schematic diagram of the structure of an energy storage device provided by an embodiment of the present disclosure. Detailed implementation manners

[0023] As can be seen from the background art, currently during the wiring process of battery modules, in order to integrate the output connection lines of multiple battery modules onto the battery management unit, the wiring of the subsequent battery module often passes through the previous battery module. In this way, the spacing between adjacent wirings in the previous battery module is small. On the one hand, it will result in too small wiring space, which is not conducive to wiring installation. On the other hand, even if forced wiring is carried out, there may be electromagnetic interference between the output connection line and the sampling connection line.

[0024] In the embodiments of the present disclosure, within the same battery module, the sampling connection lines are fixed in the isolation grooves. The isolation grooves are used to provide wiring space for the sampling connection lines of the same battery module, which can improve the space utilization rate within the battery module. There is also a module cover plate provided on the top of the battery module. The module cover plate is provided with a recessed portion. The output connection lines in adjacent battery modules can be fixed on the module cover plate, so that there is a module cover plate between the wirings of adjacent battery modules. While providing wiring space for adjacent battery modules, it also separates the wirings of adjacent battery modules, thereby also improving the electromagnetic interference phenomenon between adjacent battery modules.

[0025] In the description of the embodiments of the present disclosure, technical terms such as "first" and "second" are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present disclosure, the meaning of "a plurality" is more than two, unless otherwise specifically and clearly defined.

[0026] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of the present disclosure. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0027] In the description of the embodiments of the present disclosure, the term "and / or" is merely a relational term describing associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists, both A and B exist simultaneously, or B exists. Additionally, in this text, the character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0028] In the description of the embodiments of the present disclosure, the term "plural" refers to two or more (including two). Similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0029] In the description of the embodiments of the present disclosure, for technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the embodiments of the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of the present disclosure.

[0030] In the description of the embodiments of the present disclosure, unless otherwise clearly specified and limited, technical terms such as "install", "connect", "couple", "fix", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0031] In the corresponding drawings of the embodiments of the present disclosure, for better understanding and convenience of description, the thickness and area of the layer are enlarged. When describing a component (such as a layer, film, region, or substrate) on another component or on the surface of another component, the component can be "directly" on the surface of the other component, or there can be a third component between the two components. On the contrary, when describing a component on the surface of another component or when another component is formed or provided on the surface of a component, it means that there is no third component between the two components. In addition, when describing a component "substantially" formed on another component, it means that the component is not formed on the entire surface (or front surface) of the other component, nor on a partial edge of the entire surface.

[0032] In the description of the embodiments of the present disclosure, when a certain component "includes" another component, unless otherwise specified, other components are not excluded, and other components may further be included. In addition, when a component such as a layer, film, region, or plate is referred to as being "on / located on" another component, it may be "directly on" the other component (i.e., located on the surface of the other component with no other components therebetween), or there may be other components therebetween. In addition, when a component such as a layer, film, region, plate, etc. is "directly located on" another component, or when a component such as a layer, film, region, plate, etc. is located on the surface of another component, it means that no other components are located therebetween.

[0033] The terms used in the description of the various embodiments herein are only for describing specific embodiments and are not intended to be limiting. As used in the description of the various embodiments and the appended claims, "the component" is also intended to include the plural form unless the context clearly indicates otherwise. Among them, the component includes components such as a layer, film, region, or plate.

[0034] The embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that in the embodiments of the present disclosure, many technical details are provided for the reader to better understand the present disclosure. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present disclosure can still be implemented.

[0035] Reference Figures 1 to 6 , Figure 1 is an exploded view of a battery module provided in an embodiment of the present disclosure; Figure 2 is a schematic structural diagram of a CCS component provided in an embodiment of the present disclosure; Figure 3 is a schematic structural diagram of a separator provided in an embodiment of the present disclosure; Figure 4 is a partial schematic structural diagram of a module cover plate provided in an embodiment of the present disclosure; Figure 5 is a schematic structural diagram of an overall module cover plate provided in an embodiment of the present disclosure; Figure 6 is a schematic structural diagram of a battery module provided in an embodiment of the present disclosure.

[0036] In some embodiments, the battery module may include: a battery cell assembly 100, and the battery cell assembly 100 includes N battery cells 110.

[0037] The battery module may further include: a CCS component 101, the CCS component 101 is fixed on the top surface of the battery cell component 100, and the CCS component 101 includes: an isolation plate 111, the isolation plate 111 includes N rows of groove groups, the groove group includes a plurality of grooves, each groove exposes the top surface of the battery cell 110, and the isolation plate 111 is further provided with N isolation grooves 121, a series aluminum bar 131, the series aluminum bar 131 is located in the groove and is used to connect adjacent battery cells 110 in series.

[0038] The battery module may further include: an output connector 102, the output connector 102 is located on one side of the battery cell component 100.

[0039] The battery module may further include: a plurality of sampling connection lines 103, one sampling connection line 103 is electrically connected to the output connector 102 and a battery cell 110, and the sampling connection line 103 is fixed in the isolation groove 121.

[0040] The battery module may further include: a module cover plate 104, the module cover plate 104 is fixed on the surface of the CCS component 101, and the module cover plate 104 is provided with a recess 114, and the recess 114 is used to fix the output connection lines of adjacent battery modules.

[0041] In the embodiment of the present disclosure, within the same battery module, the sampling connection lines 103 are fixed in the isolation grooves 121, and the isolation grooves 121 are used to provide a routing space for the sampling connection lines 103 of the same battery module, which can improve the space utilization rate within the battery module. A module cover plate 104 is further provided on the top of the battery module, and the module cover plate 104 is provided with 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 spaced apart by the module cover plate 104, and while providing a routing space for adjacent battery modules, the routing between adjacent battery modules is also spaced apart, thereby improving the electromagnetic interference phenomenon between adjacent battery modules.

[0042] The number of battery cells 110 in the battery cell component 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 the number of battery cells 110 can be.

[0043] The isolation plate 111 in the CCS component 101 is a structure that isolates the battery cell 110 from other structures. The grooves in the isolation plate 111 are used to fix the series aluminum bar 131, and the rest covers the top surface of the battery cell 110 not covered by the series aluminum bar 131, thereby avoiding the situation of misconnection between the battery cell 110 and other structures and avoiding safety hazards such as short circuits.

[0044] The specific shape of the groove is not limited and can have various shapes. For example, it can be an arc-shaped groove, a square groove, an elliptical groove with a notch, etc. In this embodiment, the groove is preferably an arc-shaped groove (the arc-shaped groove should be understood in a broad sense, including an arc groove, an elliptical arc groove, etc.). The arc-shaped groove is easy to be formed by thermoforming and demoulded.

[0045] The series aluminum bars 131 in the CCS component 101 may include: series sub-aluminum bars 141, a positive aluminum bar 151, and a negative aluminum bar 161. For the battery cell 110, the battery cell 110 includes two output ports. The series sub-aluminum bars 141 are used to connect one output port of each of two adjacent battery cells 110 to connect the two adjacent battery cells 110 in series. The positive aluminum bar 151 and the negative aluminum bar 161 are respectively connected to one output port of a battery cell 110 as the positive output and the negative output.

[0046] Further, taking the battery cell assembly 100 with three battery cells 110 as an example, the battery cell assembly 100 respectively includes a first battery cell, a second battery cell, and a third battery cell. Each battery cell 110 includes a positive end and a negative end. A series sub-aluminum bar 141 is respectively connected to the positive end of a first battery cell and the negative end of the second battery cell, and then another series sub-aluminum bar 141 is respectively connected to the positive end of the second battery cell and the negative end of the third battery cell. The negative end of the first battery cell is electrically connected to the negative aluminum bar 161, and the positive end of the third battery cell is electrically connected to the positive aluminum bar 151 as the positive output and the negative output respectively. It can be understood that when the battery cell assembly 100 has other numbers of battery cells 110, the connection sequence can be deduced in turn according to the above logic.

[0047] Reference Figures 1 to 3 , in some embodiments, the CCS component 101 further includes: a plurality of first wire bundling structures 171. The first wire bundling structure 171 and the isolation groove 121 enclose a first accommodating space, and a sampling connection wire 103 is fixed in the first accommodating space. The first wire bundling structure 171 is used to fix the sampling connection wire 103, thereby preventing the sampling connection wire 103 from moving in the battery module, thereby preventing the sampling connection wires 103 from being wound around each other. Moreover, setting the first wire bundling structure 171 can also facilitate the installation of the sampling connection wire 103 to improve the reliability and aesthetics of the battery module.

[0048] In some embodiments, one end of the first wire bundling structure 171 is fixed on the isolation plate 111, and the other end can move in the directions close to and away from the isolation plate 111. The way that the other end can move can facilitate the fixing of the sampling connection wire 103 on the CCS component 101, thereby improving the convenience of the first wire bundling structure 171.

[0049] In some other embodiments, the first wire bundle structure 171 may be an integral structure with the partition board 111. During the installation process of the sampling connection wire 103, the sampling connection wire 103 can be directly passed through the first accommodation space between the first wire bundle structure 171 and the partition board 111, thereby completing the fixation of the sampling connection wire 103.

[0050] In some embodiments, the output connector 102 cooperates with the sampling connection wire 103 to complete the aggregation of the sampling results of multiple battery cells 110. In some embodiments, the output connector 102 is further connected with an output connection wire, and the output connection is electrically connected to the battery management unit of the battery module, and the sampling results corresponding to the battery cells are output by the battery management unit.

[0051] For different battery modules, the sampling signals output by different battery modules are all output through the output connection wire.

[0052] In some embodiments, the battery cell 110 includes a pole column, the series aluminum bar 131 is electrically connected to the pole column of the battery cell, and the sampling connection wire 103 is electrically connected to the series aluminum bar 131. By electrically connecting the aluminum bar to the pole column to obtain the corresponding signal, the pole column can be set as a slender strip and other structures, so that the distance between adjacent pole columns is longer, which is beneficial to the electrical connection with the series aluminum bar 131.

[0053] In some embodiments, the module cover plate 104 may be a metal cover plate, and the sampling connection wire 103 is covered by the metal cover plate to enclose a sealed space through the module cover plate 104 and the CCS component 101, thereby improving the insulation of the sampling connection wire 103 and the output connection wire and improving the electromagnetic interference problem of the sampling connection wire 103 and the output connection wire.

[0054] In some embodiments, the module cover plate 104 is a metal cover plate, and an insulating component is further provided between the CCS component 101 and the module cover plate 104 to isolate the CCS component 101 from the module cover plate 104.

[0055] Reference Figure 3 and Figure 4 In some embodiments, the module cover plate 104 further includes: at least one partition portion 124, and the partition portion 124 is located in the recessed portion 114 and divides the recessed portion 114 into a plurality of sub-recessed portions 134 spaced from each other. The arrangement of the partition portion 124 can divide the recessed portion 114 into a plurality of sub-recessed portions 134, thereby separating the output connection wires of different battery modules and facilitating the installation of different output connection wires.

[0056] In some embodiments, the widths 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 clamped in the recess 114, thereby eliminating the need for an additional wire bundling structure, reducing the material and cost of the module cover 104, and also reducing the structural complexity of the module cover 104.

[0057] Reference Figure 4 and Figure 7 , Figure 7 FIG. is a schematic structural diagram of a structure for fixing a second wire bundling structure and a module cover according to an embodiment of the present disclosure.

[0058] In some embodiments, the battery module further includes: at least one second wire bundling structure 106. The second wire bundling structure 106 is located in the recess 114. The second wire bundling structure 106 and the recess 114 enclose a second accommodation space, and one output connection line is fixed in one second accommodation space. The second wire bundling structure 106 can be used to fix the output connection line, thereby preventing the output connection line from moving randomly within the battery module, facilitating the installation of the output connection line, and improving the reliability and aesthetics of the battery module.

[0059] In some embodiments, one end of the second wire bundling structure 106 is fixed to the module cover 104, and the other end can move in directions approaching and away from the module cover 104. The movable manner of the other end can facilitate fixing the output connection line to the module cover 104, thereby improving the convenience of the second wire bundling structure 106.

[0060] In other embodiments, the second wire bundling structure 106 and the module cover 104 can be an integral structure. During the process of installing the output connection line, the output connection line can be directly passed through the second accommodation space between the second wire bundling structure 106 and the module cover 104, thereby completing the fixing of the output connection line.

[0061] In some embodiments, the recess 114 includes a plurality of spaced-apart sub-recesses 134. The second wire bundling structures 106 located within the battery module can be multiple, and each sub-recess 134 is correspondingly provided with a second wire bundling structure 106, so that the output connection lines in each sub-recess 134 can be fixed, thereby improving the reliability of the battery module.

[0062] In some embodiments, the recess 114 includes a plurality of spaced-apart sub-recesses 134. The second wire bundling structure 106 located within the battery module can be one. One second wire bundling structure 106 and different sub-recesses 134 enclose a plurality of second accommodation spaces, so that a plurality of output connection lines can be fixed within the battery module.

[0063] In some embodiments, the top surface of the partition portion 124 may be lower than the top surface of the module cover plate 104. Together with the second wire bundle structure 106, it is possible to prevent the second wire bundle structure 106 from protruding above the top surface of the battery module, thereby improving the reliability of the battery module.

[0064] Continuing to refer to Figures 1 to 3 , in some embodiments, the separator 111 further includes a clamping groove 201, which is aligned with the recess 114 and is used to engage with the recess 114. By aligning the clamping groove 201 with the recess 114, the separator 111 can be inserted into the CCS component 101, and at the same time, it can prevent the module cover plate 104 from protruding above the top surface of the battery module, thereby making the surface of the battery module flat.

[0065] Refer to Figure 1 and Figure 6 , in some embodiments, the explosion-proof valve is provided on the battery cell 110, and the clamping groove 201 is aligned with the explosion-proof valve. For the battery cell, the position of the explosion-proof valve is in the middle of the battery cell 110. By setting the clamping groove 201 to be aligned with the explosion-proof valve, the corresponding position of the clamping groove 201 can be set in the middle of the battery cell 110, and the corresponding recess 114 of the module cover plate 104 is also in the middle of the battery cell. In this way, during the assembly of different battery modules, the output connection wires can be prevented from being bent, etc., so as to improve the reliability of the assembled battery module as an energy storage device.

[0066] The explosion-proof valve is used to open when the air 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.

[0067] In some embodiments, the battery module further includes: a mica plate 107, which is aligned with the explosion-proof valve and is located between the clamping groove and the recess 114. The mica plate 107 separates the explosion-proof valve from the module cover plate 104, thereby using the mica plate 107 for heat dissipation, so as to achieve the purpose of heat insulation.

[0068] In some other embodiments, the explosion-proof valve can also be provided on the bottom surface or side surface of the battery cell 110, thereby reducing the setting of the mica plate 107 and achieving the purpose of cost reduction.

[0069] 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, and one anchoring protrusion 144 is directly opposite to one 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 assembly 101 and the module cover plate 104, and on the other hand, the anchoring grooves 181 and the anchoring protrusions 144 can also clamp the CCS assembly 101 and the module cover plate 104, thereby completing the installation of the module cover plate 104, and the module cover plate 104 can be pre-clamped on the CCS assembly 101, which can facilitate the fixing of the module cover plate 104.

[0070] In some embodiments, the aperture at the top of the anchoring groove 181 can be smaller than the diameter of the end of the anchoring protrusion 144, and the end of the anchoring protrusion 144 can have a certain elastic deformation ability. In the process of clamping the anchoring groove 181 and the anchoring protrusion 144, the two are squeezed against each other, and the end of the anchoring protrusion 144 is deformed and the diameter is reduced, so that the end of the anchoring protrusion 144 can penetrate into the interior of the anchoring groove 181. Thereafter, the end of the anchoring protrusion 144 restores the deformation, so that the anchoring protrusion 144 and the anchoring groove 181 will not be detached at will, thereby completing the coordination and fixation between the anchoring protrusion 144 and the anchoring groove 181.

[0071] In some embodiments, the anchoring groove 181 is T-shaped, and an anchoring concave platform 191 is provided at the junction of the anchoring groove 181 that is recessed in different directions, and the anchoring protrusion 144 is engaged with the anchoring concave platform 191. The anchoring concave platform 191 is arranged at the junction of the anchoring groove 181 that is recessed in different directions. During the process of assembling the anchoring concave platform 191 and the anchoring protrusion 144, the stress on the anchoring concave platform 191 can be dispersed to various parts of the anchoring groove 181, reducing the possibility of abnormality caused by excessive deformation of the anchoring groove 181 during use. In addition, the location of the junction is a location where the reliability of the anchoring groove 181 is relatively high. The anchoring concave platform 191 is arranged at the location of the junction, which can also improve the reliability of the battery module.

[0072] In some embodiments, the battery module may further include a baffle (not shown), which is used to cover the recessed portion 114. By shielding the recessed portion 114 with the baffle, dust or other debris can be prevented from falling into the recessed portion 114 when the output connection line is fixed in the recessed portion 114, thereby further improving the reliability of the battery module.

[0073] In some embodiments, the top surface of the baffle can be flush with the top surface of the module cover plate 104, so as to avoid the baffle protruding from the module cover plate 104, which can improve the overall aesthetics of the battery module and can also avoid occupying additional installation space during the assembly of the battery module into an energy storage device, thereby improving the space utilization rate of the energy storage device subsequently.

[0074] In the embodiments of the present disclosure, within the same battery module, the sampling connection line 103 is fixed in the isolation groove 121. The isolation groove 121 is used to provide a 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 further provided on the top of the battery module. A recessed portion 114 is provided on the module cover plate 104. The output connection lines between adjacent battery modules can be fixed on the module cover plate 104, so that the routing between adjacent battery modules is spaced apart by the module cover plate 104. While providing a routing space for adjacent battery modules, the routing of adjacent battery modules is also spaced apart, thereby improving the electromagnetic interference phenomenon between adjacent battery modules.

[0075] Another embodiment of the present disclosure further provides an energy storage device. The energy storage device may include the battery module in some or all of the above embodiments. The energy storage device provided in another embodiment of the present 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 refer to the above embodiments and will not be repeated below.

[0076] Reference Figure 1 、 Figure 4 and Figure 7 , Figure 7 is a schematic structural diagram of an energy storage device provided in an embodiment of the present disclosure.

[0077] In some embodiments, the energy storage device may include: a housing, and an accommodation space is provided inside the housing.

[0078] The energy storage device may further include: a plurality of battery modules 10 as in some or all of the above embodiments, and the battery modules 10 are located in the accommodation space.

[0079] The energy storage device may further include: a battery management unit 200, and the output connector 102 of each battery module 10 is electrically connected to the battery management unit 200 via an output connection line 105.

[0080] For each battery module 10, the sampling connection line 103 of each battery module 10 first converges into the output connector 102, and then is connected to the output connector 102 and the battery management unit 200 respectively through the output connection line 105, so that the sampling signals of all battery modules 10 are converged into the battery management unit 200, and the overall sampling signal is output through the battery management unit 200.

[0081] For the sampling connection line 103 and the output connection line 105, the wire diameter of the sampling connection line 103 is generally smaller than that of the output connection line 105, because the sampling connection line 103 is only responsible for outputting the sampling signal of one battery cell 110, while the output connection line 105 needs to be responsible for the sampling signal of the entire battery module 10.

[0082] The sampling connection line 103 generally includes a metal wire and an insulating skin wrapped on the surface of the metal wire. Similarly, the output connection line 105 also includes a metal wire and an insulating skin wrapped inside the metal wire. The difference is that the number of metal wires in the output connection line 105 is greater than that in the sampling connection line 103, and the thickness of the insulating skin in the output connection line 105 is greater than that of the insulating skin. In the related art, the wiring of different battery modules 10 is usually inside the battery module 10. Since the number of metal wires in the output connection line 105 is large, the electromagnetic interference generated is large. At the same time, the insulating skin of the sampling connection line 103 is thin, resulting in the output connection line 105 being likely 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 is very likely that the signal on the sampling connection line 103 is inaccurate. By separating different sampling connection lines 103 and output connection lines 105, the embodiments of the present disclosure avoid interference between the sampling connection line 103 and the output connection line 105 while facilitating wiring.

[0083] 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 far from the battery management unit 200 is fixed in the recess 114 of the battery module 10 close to the battery management unit 200.

[0084] For example, when there are two battery modules 10 arranged in a row, the output connection line 105 of the battery module 10 far from the battery management unit 200 is fixed in the recess 114 of the battery module 10 close to the battery management unit 200, so as to isolate the output connection line 105 of the battery module 10 far from the battery management unit 200 from the sampling connection line 103 of the battery module 10 close to the battery management unit 200. On the one hand, electromagnetic interference between the output connection line 105 and the sampling connection line 103 is avoided. On the other hand, the sampling connection line 103 is installed by using the recess 114. Similarly, when there are three battery modules 10 arranged in a row, the three battery modules 10 are defined as the first battery module, the second battery module and the third battery module from the direction close to the battery management unit 200 towards the direction far from the battery management unit 200. Among them, 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. The output connection line 105 of the third battery module is installed in the recesses 114 of the first battery module and the second battery module, so as to complete 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 separated from the output connection lines 105 of the second battery module and the third battery module. For the second battery module, the sampling connection line 103 of the second battery module is separated from the output connection line 105 of the third battery module, improving the reliability of the energy storage device.

[0085] It can be understood that the above is only an example when the energy storage device includes two battery modules 10 and three battery modules 10. The energy storage device may also include other numbers of battery modules 10, and the installation methods of other numbers of battery modules 10 can be deduced according to the above content, which will not be elaborated here.

[0086] In some embodiments, the recess 114 of one battery module 10 is aligned with the output connector 102 of another battery module 10 among two adjacent battery modules 10 arranged in a row.

[0087] 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 aligned with the recess 114 of the battery module 10 closer to the battery management unit 200. Thus, when installing the output connection line 105 of the battery module 10 farther from the battery management unit 200 into the recess 114 of the battery module 10 closer to the battery management unit 200, the bending of the output connection line 105 can be avoided, the reliability of the output connection line 105 can be improved, abnormal problems caused by long-term bending of the output connection line 105 can be avoided. At the same time, the cost of the energy storage device can be reduced, the length of the output connection line 105 can be optimized, unnecessary material waste can be reduced, and arranging it above the battery module 10 is more conducive to the production of an automated production line, reducing the production cost.

[0088] Moreover, controlling the output connector 102 of the battery module 10 farther from the battery management unit 200 to be aligned with the recess 114 of the battery module 10 closer to the battery management unit 200 can also reduce the spacing between adjacent battery modules 10. If the output connector 102 of the battery module 10 farther from the battery management unit 200 is misaligned with the recess 114 of the battery module 10 closer to the battery management unit 200, in order to install the output connection line 105 into the recess 114, the output connection line 105 inevitably needs to be bent. In order to avoid abnormalities during the bending of the output connection line 105, more installation space needs to be provided. Therefore, setting the output connector 102 of the battery module 10 farther from the battery management unit 200 to be aligned with the recess 114 of the battery module 10 closer to the battery management unit 200 can also reduce the spacing between adjacent battery modules 10, thereby improving the space utilization rate of the energy storage device.

[0089] In some embodiments, the module cover plate 104 further includes: at least one partition 124. The partition 124 is located in the recess 114 and divides the recess 114 into a plurality of sub-recesses 134 spaced from each other. 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 towards the direction away from the battery management unit 200, the number of sub-recesses 134 of different battery modules 10 forms an arithmetic sequence with a common difference of 1.

[0090] Taking three battery modules 10 as an example, define the three battery modules 10 from the direction close to the battery management unit 200 towards the direction away from the battery management unit 200 as the first battery module, the second battery module, and the third battery module. The number of sub-recessed portions 134 of the first battery module is 2, the number of sub-recessed portions 134 of the second battery module is 1, and the number of sub-recessed portions 134 of the third battery module is 0. It can be understood that for the first battery module, the output connection wires 105 of the second battery module and the third battery module will be installed on the first battery module, and the output connection wires 105 of the third battery module will be installed on the second battery module. Based on this, setting the number of sub-recessed portions 134 of the first battery module to 2 can facilitate the installation of the output connection wires 105 of the second battery module and the third battery module.

[0091] In some embodiments, the module cover plate 104 further includes: at least one partition portion 124. The partition portion 124 is located in the recessed portion 114 and divides the recessed portion 114 into a plurality of mutually spaced sub-recessed portions 134. Among the n battery modules 10 arranged in a row, the number of sub-recessed portions 134 on each battery module 10 is equal and is n - 1. For the battery module 10 closest to the battery management unit 200, this battery module 10 needs to install the output sampling wires of the remaining battery modules 10. Therefore, the number of sub-recessed portions 134 of the battery module 10 closest to the battery management unit 200 needs to be set to n - 1. At the same time, in order to facilitate the production of the module cover plate 104, the number of sub-recessed portions 134 on each battery module 10 is set to be equal.

[0092] In the embodiments of the present disclosure, the wiring path of the output connection wires 105 can be simplified, the space utilization rate of the energy storage device can be improved, the top space of the battery module 10 can be fully utilized, the output connection wires 105 do not need to occupy extra space, the overall layout of the energy storage device is compact, and compared with the wiring method in the related art, more space can be saved, and more battery cells 110 can be arranged under the same space size, which can improve the energy density of the energy storage device.

[0093] Moreover, the sampling connection wires 103 and the output connection wires 105 of the battery modules 10 arranged in a row are separated by the module cover plate 104, which can reduce the electromagnetic interference between two adjacent battery modules 10 and improve the accuracy and stability of their respective signal transmissions. On the other hand, arranging the output connection wires 105 above the battery modules 10 helps to form a natural convection channel (in the related art, the output connection wires are arranged between the battery modules, and when the battery modules generate heat, the output connection wires also release heat). After the output connection wires are arranged above the battery modules in the embodiments of the present disclosure, it is more spacious and conducive to heat dissipation. Especially when working in a high-temperature environment, it can better maintain the temperature of the battery modules 10 within a reasonable range. The sampling connection wires 103 and the output connection wires 105 between the battery modules 10 are separated by the module cover plate 104, and the output connection wires 105 do not directly contact the heat source battery cells 110, reducing the risk of aging or damage caused by local overheating.

[0094] During the installation process of the sampling connection wires 103 and the output connection wires 105, by setting the first wire bundle structure 171 and the second wire bundle structure 106, different connection wires can also be arranged according to a predetermined path, making the installation process more standardized and easy to operate, and reducing the possibility of human errors.

[0095] Those of ordinary skill in the art can understand that the above embodiments are specific embodiments for implementing the present disclosure. In actual applications, various changes can be made to them in form and details without departing from the spirit and scope of the embodiments of the present disclosure. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the embodiments of the present disclosure. Therefore, the protection scope of the embodiments of the present disclosure should be subject to the scope defined by the claims.

Claims

1. A battery module, characterized in that: include: A battery cell assembly, wherein the battery cell assembly includes N battery cells; CCS assembly, the CCS assembly is fixed on the top surface of the battery cell assembly, the CCS assembly comprises: an isolation plate, the isolation plate comprises N rows of groove groups, the groove groups comprise a plurality of grooves, each of the grooves exposes the top surface of the battery cell, the isolation plate is further provided with N isolation grooves, and a series aluminum bar, the series aluminum bar is located in the groove, and is used to connect the adjacent battery cells in series; An output connector, the output connector being located on one side of the battery core assembly; A plurality of sampling connection lines, one of the sampling connection lines is electrically connected to the output connector and one of the battery cells, and the sampling connection line is fixed in the isolation slot; A module cover plate is fixed on the surface of the CCS assembly, and the module cover plate is provided with a recessed portion, and the recessed portion is used to fix the output connection line of the adjacent battery module.

2. The battery module according to claim 1, characterized in that: The module cover plate further includes: at least one partitioning portion, wherein the partitioning portion is located in the recessed portion and divides the recessed portion into a plurality of sub-recessed portions spaced apart from each other.

3. The battery module according to claim 1, characterized in that: The isolation plate further comprises a clamping groove, which is directly opposite to the recessed portion and is used for clamping with the recessed portion.

4. The battery module according to claim 3, characterized in that: The battery core is provided with an explosion-proof valve, and the clamping groove is directly opposite to 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 to the explosion-proof valve and is located between the clamping groove and the recessed portion.

6. The battery module according to claim 1, characterized in that: The CCS assembly further includes: a plurality of first wire bundle structures, wherein the first wire bundle structures and the isolation grooves enclose a first accommodation space, and one of the first accommodation spaces fixes one of the sampling connection lines.

7. The battery module according to claim 1, characterized in that: Also includes: At least one second wire harness structure, the second wire harness structure is located in the recessed portion, the second wire harness structure and the recessed portion enclose a second accommodating space, and one of the output connecting wires is fixed in the second accommodating space.

8. The battery module according to claim 1, characterized in that: The isolation plate is also provided with a plurality of anchoring grooves, and the module cover is provided with a plurality of anchoring protrusions, wherein one anchoring protrusion is directly opposite to one anchoring groove.

9. The battery module according to claim 8, characterized in that: The anchoring groove is T-shaped, and an anchoring concave platform is provided at the junction of the anchoring grooves which are concave in different directions, and the anchoring protrusion is clamped with the anchoring concave platform.

10. The battery module according to claim 1, characterized in that: The battery module further includes a baffle plate, which is used to cover the recessed portion.

11. An energy storage device, characterized in that: include: A housing, wherein a receiving space is provided in the housing; A plurality of battery modules according to any one of claims 1 to 10, wherein the battery modules are located in the accommodation space; 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.

12. The energy storage device according to claim 11, characterized in that: There are multiple battery modules, and the multiple battery modules are arranged in an array. Among the multiple battery modules arranged in a row, the output connection lines of the battery modules far away from the battery management unit are fixed in the recessed part of the battery module close to the battery management unit.

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

14. The energy storage device according to claim 12, characterized in that: The module cover also includes: at least one partition portion, which is located in the recessed portion and divides the recessed portion into a plurality of sub-recessed portions spaced apart from each other. Among the n battery modules arranged in a row, the number of sub-recessed portions of the battery module closest to the battery management unit is n-1, and in the direction from close to the battery management unit to away from the battery management unit, the number of sub-recessed portions of different battery modules is an arithmetic progression with a tolerance of 1.

15. The energy storage device according to claim 12, characterized in that: The module cover also includes: at least one partition, which is located in the recessed portion and divides the recessed portion into a plurality of sub-recessed portions spaced apart from each other. Among the n battery modules arranged in a row, the number of the sub-recessed portions on each battery module is equal and is n-1.

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