Battery modules and energy storage devices

Abstract

The embodiments of the present disclosure relate to the field of energy storage and provide a battery module and an energy storage device, wherein the battery module may include: a cell assembly, the cell assembly includes N cell; a 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 includes N rows of groove groups, the groove group includes multiple grooves, each groove exposes the top surface of the cell, and the isolation plate is also provided with N isolation grooves, series aluminum bars, the series aluminum bars are located in the grooves, and are used to connect adjacent cell in series; an output connector, the output connector is located on one side of the cell assembly; multiple sampling connection lines, a sampling connection line is electrically connected to the output connector and a cell, and the sampling connection line is fixed in the isolation groove; a module cover, the module cover is fixed on the surface of the CCS assembly, the module cover is provided with a recessed portion, the recessed portion is used to fix the output connection lines of adjacent battery modules, which can improve the reliability of the battery module.

Description

Technical Field

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

[0002] Energy storage systems typically combine multiple battery cells into a battery module, which is then installed in series and parallel inside a battery pack. Electrical components and structural fixtures are then installed, and finally the battery pack is mounted on a battery rack to form a battery cluster, which in turn forms the entire energy storage system.

[0003] Battery modules are electrically connected to each other via copper busbars. A large number of wiring harnesses are also located within the battery modules for electrical connection and signal transmission. These wiring harnesses typically pass through the gaps between the battery modules. To allow the battery cells to occupy a larger space, resulting in a higher current carrying capacity and a higher degree of integration, the gaps between the modules may be smaller. However, excessively small gaps can lead to wiring difficulties or electromagnetic interference between adjacent wires. Summary of the Invention

[0004] The 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 one hand, embodiments of the present disclosure provide a battery module, comprising: a cell assembly, the cell assembly comprising N cell(s); a CCS assembly, the CCS assembly being fixed on the top surface of the cell assembly, the CCS assembly comprising: an isolation plate, the isolation plate comprising N rows of groove groups, the groove group comprising a plurality of grooves, each of the grooves exposing the top surface of the cell, the isolation plate also being provided with N isolation grooves, a series aluminum bar, the series aluminum bar being located in the grooves, for connecting adjacent cell(s) in series; an output connector, the output connector being located on one side of the cell assembly; a plurality of sampling connection lines, one sampling connection line being electrically connected to the output connector and one cell, and the sampling connection line being fixed in the isolation groove; a module cover, the module cover being fixed on the surface of the CCS assembly, the module cover being provided with a recessed portion, the recessed portion being used to fix the output connection lines of adjacent battery modules.

[0006] In some embodiments, the module cover 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.

[0007] In some embodiments, the isolation plate further includes a snap-in groove, which is directly opposite to the recessed portion and is used for snapping with the recessed portion.

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

[0009] In some embodiments, the battery module further includes: a mica board, the mica board is opposite to the explosion-proof valve, and is located between the clamping groove and the recessed portion.

[0010] In some embodiments, the CCS assembly further includes: a plurality of first wire bundle structures, wherein the first wire bundle structures and the isolation grooves form a first accommodation space, and each of the first accommodation spaces fixes one of the sampling connection lines.

[0011] In some embodiments, the system further 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 form a second accommodation space, and one of the output connecting wires is fixed in the second accommodation space.

[0012] In some embodiments, the isolation plate is further provided with a plurality of anchoring grooves, and the module cover is provided with a plurality of anchoring protrusions, and one of the anchoring protrusions is directly opposite to one of the anchoring grooves.

[0013] In some embodiments, the anchoring groove is T-shaped, and an anchoring concave platform is provided at the junction of the anchoring grooves that are recessed in different directions, and the anchoring protrusion is engaged with the anchoring concave platform.

[0014] In some embodiments, the battery module further includes a baffle, which is used to cover the recessed portion.

[0015] According to some embodiments of the present disclosure, on the other hand, an energy storage device is further provided, comprising: a shell, wherein a housing space is provided in the shell; a plurality of battery modules as described above, wherein the battery modules are located in the housing 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.

[0016] In some embodiments, 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 away from the battery management unit are fixed in the recessed portion of the battery modules close to the battery management unit.

[0017] In some embodiments, the recessed portion of one of two adjacent battery modules arranged in a row is directly opposite to the output connector of the other battery module.

[0018] In some embodiments, the module cover also includes: at least one partition, the partition is located in the recessed portion, and the recessed portion is divided 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.

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

[0020] The technical solution provided by the embodiments of the present 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 is used to provide 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 is also provided on the top of the battery module, and a recessed portion is provided on the module cover. The output connection lines in adjacent battery modules can be fixed on the module cover so that the routing lines between adjacent battery modules are separated by the module cover. While providing routing space for adjacent battery modules, the routing lines of adjacent battery modules are also separated, thereby also improving the electromagnetic interference phenomenon between adjacent battery modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplified descriptions do not constitute a limitation on the embodiments. Unless otherwise stated, the pictures in the drawings do not constitute a scale limitation. In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the traditional technology, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 An exploded view of a battery module according to an embodiment of the present disclosure;

[0023] Figure 2 A schematic structural diagram of a CCS component provided in one embodiment of the present disclosure;

[0024] Figure 3 A schematic structural diagram of an isolation plate provided in one embodiment of the present disclosure;

[0025] Figure 4A schematic diagram of a partial structure of a module cover provided in one embodiment of the present disclosure;

[0026] Figure 5 A schematic diagram of the overall structure of a module cover provided in one embodiment of the present disclosure;

[0027] Figure 6 A schematic structural diagram of a battery module provided in one embodiment of the present disclosure;

[0028] Figure 7 A schematic structural diagram of an energy storage device provided in one embodiment of the present disclosure. DETAILED DESCRIPTION

[0029] From the background technology, it can be seen that in the current routing process of battery modules, in order to integrate the output connection lines of multiple battery modules into the battery management unit, the routing of the latter battery module often passes through the previous battery module. This will result in a small interval between adjacent routing lines in the previous battery module. On the one hand, the routing space will be too small, which is not conducive to routing installation. On the other hand, even if the routing is forced, electromagnetic interference may occur between the output connection line and the sampling connection line.

[0030] In the embodiment of the present disclosure, within the same battery module, the sampling connection line is fixed in the isolation groove, and the isolation groove is used to provide 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 is also provided on the top of the battery module, and a recessed portion is provided on the module cover. The output connection lines in adjacent battery modules can be fixed on the module cover so that the routing lines between adjacent battery modules are separated by the module cover. While providing routing space for adjacent battery modules, the routing lines of adjacent battery modules are also separated, thereby improving the electromagnetic interference phenomenon between adjacent battery modules.

[0031] In the description of the embodiments of the present disclosure, technical terms such as "first" and "second" are used solely to distinguish between different objects and should not be understood to indicate or imply relative importance or to implicitly specify the quantity, specific order, or primary and secondary relationship of the technical features indicated. In the description of the embodiments of the present disclosure, "plurality" means more than two, unless otherwise specifically defined.

[0032] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present disclosure. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0033] In the description of the embodiments of the present disclosure, the term "and / or" is merely a description of an association relationship between associated objects, indicating that three relationships may exist. For example, A and / or B can represent the following three situations: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0034] In the description of the embodiments of the present disclosure, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0035] In the description of the embodiments of the present disclosure, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present disclosure.

[0036] In the description of the embodiments of the present disclosure, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and they can refer to internal connectivity between two components or interaction between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present disclosure based on specific circumstances.

[0037] In the accompanying drawings corresponding to the embodiments of the present disclosure, the thickness and area of ​​layers are exaggerated for better understanding and ease of description. When a component (such as a layer, film, region, or substrate) is described as being on or on the surface of another component, the component may be "directly" located on the surface of the other component, or a third component may be present between the two components. Conversely, when a component is described as being on the surface of another component, or as being formed or disposed on the surface of one component, it indicates that there is no third component between the two components. Furthermore, when a component is described as being "substantially" formed on another component, this 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.

[0038] In the description of the embodiments of the present disclosure, when a component is referred to as "including" another component, unless otherwise specified, this does not exclude other components, and other components may further be included. Furthermore, when a component such as a layer, film, region, or plate is referred to as being "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 between them) or another component may be present between them. Furthermore, when a component such as a layer, film, region, or plate is referred to as being "directly on" another component, or when a component such as a layer, film, region, or plate is located on the surface of another component, this means that no other components are located between them.

[0039] The terms used herein in the description of the various embodiments are intended only to describe the 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 intended to include the plural form unless the context clearly indicates otherwise. A component includes a layer, film, region, or plate.

[0040] The following describes various embodiments of the present disclosure in detail with reference to the accompanying drawings. However, those skilled in the art will appreciate that many technical details are provided in the various embodiments of the present disclosure to facilitate a better understanding of the present disclosure. However, even without these technical details and the various variations and modifications based on the following embodiments, the technical solutions claimed in the present disclosure can still be implemented.

[0041] refer to Figures 1 to 6 , Figure 1 An exploded view of a battery module according to an embodiment of the present disclosure; Figure 2 A schematic structural diagram of a CCS component provided in one embodiment of the present disclosure; Figure 3 A schematic structural diagram of an isolation plate provided in one embodiment of the present disclosure; Figure 4 A schematic diagram of a partial structure of a module cover provided in one embodiment of the present disclosure; Figure 5 A schematic diagram of the overall structure of a module cover provided in one embodiment of the present disclosure; Figure 6 A schematic structural diagram of a battery module provided in one embodiment of the present disclosure.

[0042] In some embodiments, the battery module may include: a battery cell assembly 100 including N battery cells 110 .

[0043] The battery module can also include: a CCS assembly 101, the CCS assembly 101 is fixed on the top surface of the battery cell assembly 100, the CCS assembly 101 includes: an isolation plate 111, the isolation plate 111 includes N rows of groove groups, the groove group includes multiple grooves, each groove exposes the top surface of the battery cell 110, and the isolation plate 111 is also 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.

[0044] The battery module may further include: an output connector 102 , which is located on one side of the battery cell assembly 100 .

[0045] The battery module may further include: a plurality of sampling connection lines 103 , wherein one sampling connection line 103 is electrically connected to the output connector 102 and one battery cell 110 , and the sampling connection line 103 is fixed in the isolation groove 121 .

[0046] The battery module may further include: a module cover 104 , which is fixed to the surface of the CCS assembly 101 . The module cover 104 is provided with a recessed portion 114 , which is used to fix the output connection wires of adjacent battery modules.

[0047] In the embodiment 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 routing space for the sampling connection line 103 of the same battery module, which can improve the space utilization within the battery module. A module cover 104 is also provided on the top of the battery module. The module cover 104 is provided with a recessed portion 114. The output connection lines in adjacent battery modules can be fixed on the module cover 104 so that the routing lines between adjacent battery modules are separated by the module cover 104. While providing routing space for adjacent battery modules, the routing lines of adjacent battery modules are also separated, thereby improving the electromagnetic interference phenomenon between adjacent battery modules.

[0048] The number of battery cells 110 in the battery 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 battery cells 110 can be used.

[0049] The isolation plate 111 in the CCS assembly 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 bars 131, and the remaining portion covers the top surface of the battery cell 110 not covered by the series aluminum bars 131, thereby preventing the battery cell 110 from being accidentally connected to other structures and avoiding safety hazards such as short circuits.

[0050] The specific shape of the groove is not limited and can have various shapes, for example, an arc groove, a square groove, an oval groove with a notch, etc. In this embodiment, the groove is preferably an arc groove (arc groove should be understood in a broad sense, including circular arc groove, oval arc groove, etc.). The arc groove is easy to vacuum form and demold.

[0051] The series aluminum bar 131 in the CCS component 101 may include: a series sub-aluminum bar 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 bar 141 is 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 a positive output and a negative output.

[0052] Furthermore, taking the example of a battery cell assembly 100 having three battery cells 110, the battery cell assembly 100 includes a first battery cell, a second battery cell, and a third battery cell, each of which includes a positive terminal and a negative terminal. A series sub-aluminum bar 141 connects the positive terminal of the first battery cell and the negative terminal of the second battery cell, respectively, and then connects the positive terminal of the second battery cell and the negative terminal of the third battery cell through another series sub-aluminum bar 141. The negative terminal of the first battery cell is electrically connected to the negative aluminum bar 161, and the positive terminal of the third battery cell is electrically connected to the positive aluminum bar 151, serving as the positive and negative outputs, respectively. It is understandable that when the battery cell assembly 100 has other numbers of battery cells 110, the connection order can be inferred in sequence according to the above logic.

[0053] refer to Figures 1 to 3 In some embodiments, the CCS assembly 101 further includes: a plurality of first cable assemblies 171. The first cable assemblies 171 and the isolation slots 121 define a first accommodation space, which secures a sampling cable 103. The first cable assemblies 171 are used to secure the sampling cable 103, thereby preventing the sampling cable 103 from moving within the battery module and becoming entangled. Furthermore, the provision of the first cable assemblies 171 facilitates the installation of the sampling cable 103, thereby improving the reliability and aesthetics of the battery module.

[0054] In some embodiments, one end of the first harness structure 171 is fixed on the isolation plate 111, and the other end can be moved toward and away from the isolation plate 111. The movable manner of the other end can facilitate the fixing of the sampling connection line 103 on the CCS assembly 101, thereby improving the convenience of the first harness structure 171.

[0055] In other embodiments, the first wire harness structure 171 can be an integrated structure 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 the sampling connection line 103 through the first accommodation space between the first wire harness structure 171 and the isolation plate 111.

[0056] In some embodiments, the output connector 102 cooperates with the sampling connection line 103 to complete the collection of sampling results of multiple battery cells 110. In some embodiments, the output connector 102 is also connected to an output connection line, and the output connection is electrically connected to the battery management unit of the battery module, and the battery management unit outputs the sampling results corresponding to the battery cells.

[0057] For different battery modules, the sampling signals output by different battery modules are all output through output connection lines.

[0058] In some embodiments, the battery cell 110 includes a pole, the series aluminum bar 131 is electrically connected to the pole of the battery cell, the sampling connection line 103 is electrically connected to the series aluminum bar 131, and the corresponding signal is obtained through the electrical connection between the aluminum bar and the pole. The pole can be set to a structure such as a slender strip to make the distance between adjacent poles longer, which is conducive to electrical connection with the series aluminum bar 131.

[0059] In some embodiments, the module cover 104 can be a metal cover, and the sampling connection line 103 is covered with the metal cover to form a sealed space through the module cover 104 and the CCS component 101, thereby improving the insulation of the sampling connection line 103 and the output connection line, and improving the electromagnetic interference problem between the sampling connection line 103 and the output connection line.

[0060] 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 .

[0061] refer to Figure 3 and Figure 4 In some embodiments, the module cover 104 further includes: at least one separator 124, which is located within the recessed portion 114 and divides the recessed portion 114 into a plurality of mutually spaced sub-recesses 134. The separator 124 can divide the recessed portion 114 into a plurality of sub-recesses 134, thereby isolating the output connection wires of different battery modules and facilitating the installation of the different output connection wires.

[0062] In some embodiments, the width of different sub-recesses 134 can be set to be the same as the wire diameter of the output connecting line, so that the output connecting line can be directly clamped in the recess 114, thereby eliminating the need for additional wiring harness structure design, reducing the material and cost of the module cover 104, and reducing the structural complexity of the module cover 104.

[0063] refer to Figure 4 and Figure 7 , Figure 7 A schematic diagram of a structure in which a second wiring harness structure is fixed to a module cover plate according to an embodiment of the present disclosure.

[0064] In some embodiments, the battery module further includes at least one second wire harness structure 106 . The second wire harness structure 106 is located in the recessed portion 114 . The second wire harness structure 106 and the recessed portion 114 form a second accommodation space, which secures an output cable. The second wire harness structure 106 secures the output cable, preventing it from moving freely within the battery module. This facilitates installation of the output cable and improves the reliability and aesthetics of the battery module.

[0065] In some embodiments, one end of the second wiring harness structure 106 is fixed on the module cover 104, and the other end can be moved toward the module cover 104 and away from the module cover 104. The movable manner of the other end can facilitate the fixing of the output connecting line on the module cover 104, thereby improving the convenience of the second wiring harness structure 106.

[0066] In other embodiments, the second wiring harness structure 106 can be an integrated structure with the module cover 104. During the installation of the output connecting wire, the output connecting wire can be fixed by directly passing the output connecting wire through the second accommodating space between the second wiring harness structure 106 and the module cover 104.

[0067] In some embodiments, the recess 114 includes a plurality of sub-recesses 134 spaced apart from each other. There may be multiple second wiring harness structures 106 located within the battery module, and each sub-recess 134 is correspondingly provided with a second wiring harness structure 106, so that the output connecting wires within each sub-recess 134 can be fixed, thereby improving the reliability of the battery module.

[0068] In some embodiments, the recess 114 includes a plurality of sub-recesses 134 spaced apart from each other, and the second wiring harness structure 106 located in the battery module can be one, and one second wiring harness structure 106 and different sub-recesses 134 form a plurality of second accommodating spaces, so that a plurality of output connecting wires can be fixed in the battery module.

[0069] In some embodiments, the top surface of the partition 124 can be lower than the top surface of the module cover 104. Combined with the second wiring harness structure 106, the second wiring harness structure 106 can be prevented from protruding from the top surface of the battery module, thereby improving the reliability of the battery module.

[0070] Continue to refer Figures 1 to 3 In some embodiments, the isolation plate 111 further includes a snap-fitting groove 201 that faces the recessed portion 114 and is configured to snap-fit ​​therewith. With the snap-fitting groove 201 and the recessed portion 114 facing each other, the isolation plate 111 can be embedded within the CCS assembly 101 while preventing the module cover 104 from protruding from the top surface of the battery module, thereby ensuring a smooth surface for the battery module.

[0071] refer to Figure 1 and Figure 6 In some embodiments, an explosion-proof valve is provided on the battery cell 110, and the snap-in groove 201 is opposite to the explosion-proof valve. For the battery cell, the explosion-proof valve is located in the middle of the battery cell 110. The snap-in groove 201 is set to be opposite to the explosion-proof valve. The corresponding position of the snap-in groove 201 can be set in the middle of the battery cell 110, and the corresponding recessed portion 114 of the module cover 104 is also located in the middle of the battery cell. In this way, the output connecting wires can be prevented from bending during the assembly of different battery modules, thereby improving the reliability of the assembled battery modules after being assembled into an energy storage device.

[0072] 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 to prevent the battery cell 110 from exploding.

[0073] In some embodiments, the battery module further includes a mica plate 107, which is located opposite the explosion-proof valve and between the engaging groove and the recessed portion 114. The explosion-proof valve is isolated from the module cover 104 by the mica plate 107, thereby utilizing the mica plate 107 for heat dissipation and achieving thermal insulation.

[0074] In other embodiments, the explosion-proof valve may be disposed on the bottom or side of the battery cell 110 , thereby reducing the number of mica boards 107 and achieving the purpose of reducing costs.

[0075] 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 104 is provided with a plurality of anchoring protrusions 144, with each anchoring protrusion 144 directly aligned with each anchoring groove 181. The engagement between the anchoring grooves 181 and the anchoring protrusions 144 facilitates positioning between the CCS assembly 101 and the module cover 104. Furthermore, the anchoring grooves 181 and the anchoring protrusions 144 can also securely connect the CCS assembly 101 and the module cover 104, thereby completing the installation of the module cover 104. Furthermore, the module cover 104 can be pre-secured to the CCS assembly 101, facilitating securement of the module cover 104.

[0076] 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. After that, the end of the anchoring protrusion 144 recovers 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.

[0077] In some embodiments, the anchoring groove 181 is T-shaped, and an anchoring recess 191 is provided at the intersection of the recesses of the anchoring groove 181 in different directions. The anchoring protrusion 144 engages with the anchoring recess 191. Positioning the anchoring recess 191 at the intersection of the recesses of the anchoring groove 181 in different directions allows the stress applied to the anchoring recess 191 to be dispersed throughout the anchoring groove 181 during assembly of the anchoring recess 191 and the anchoring protrusion 144, thereby reducing the possibility of excessive deformation of the anchoring groove 181 during use, leading to abnormalities. Furthermore, the intersection is a location where the anchoring groove 181 has relatively high reliability. Positioning the anchoring recess 191 at the intersection can also improve the reliability of the battery module.

[0078] In some embodiments, the battery module may further include a baffle (not shown) that covers the recess 114. Covering the recess 114 with the baffle can also prevent dust or other debris from falling into the recess 114 when the output connection wire is fixed therein, thereby further improving the reliability of the battery module.

[0079] 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, improving the overall aesthetics of the battery module, and avoiding the need for the battery module to occupy additional installation space during the process of assembling it into an energy storage device, thereby improving the space utilization of the energy storage device in the future.

[0080] In the embodiment 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 routing space for the sampling connection line 103 of the same battery module, which can improve the space utilization within the battery module. A module cover 104 is also provided on the top of the battery module. The module cover 104 is provided with a recessed portion 114. The output connection lines in adjacent battery modules can be fixed on the module cover 104 so that the routing lines between adjacent battery modules are separated by the module cover 104. While providing routing space for adjacent battery modules, the routing lines of adjacent battery modules are also separated, thereby improving the electromagnetic interference phenomenon between adjacent battery modules.

[0081] Another embodiment of the present disclosure further provides an energy storage device, which may include the battery modules in some or all of the above embodiments. The energy storage device provided by another embodiment of the present disclosure will be further described below with reference to the accompanying drawings. It should be noted that the parts that are the same or corresponding to those in the above embodiments can refer to the above embodiments and will not be repeated below.

[0082] refer to Figure 1 、 Figure 4 and Figure 7 , Figure 7 A schematic structural diagram of an energy storage device provided in one embodiment of the present disclosure.

[0083] In some embodiments, the energy storage device may include: a shell with a receiving space provided in the shell.

[0084] The energy storage device may further include: a plurality of battery modules 10 as described in some or all of the above embodiments, and the battery modules 10 are located in the accommodation space.

[0085] 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 .

[0086] For each battery module 10, the sampling connection line 103 of each battery module 10 is first collected into 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.

[0087] For the sampling connection line 103 and the output connection line 105, the wire diameter of the sampling connection line 103 is usually smaller than the wire diameter of the output connection line 105. This is 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 is responsible for the sampling signal of the entire battery module 10.

[0088] The sampling connection line 103 generally includes a metal wire and an insulating layer wrapped around the surface of the metal wire. Similarly, the output connection line 105 also includes a metal wire and an insulating layer 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 layer in the output connection line 105 is greater than the thickness of the insulating layer. In the related art, the wiring of different battery modules 10 is generally 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 layer 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 is likely to cause inaccurate signals on the sampling connection line 103. The embodiment of the present disclosure separates different sampling connection lines 103 and the output connection line 105, thereby facilitating routing while avoiding mutual interference between the sampling connection line 103 and the output connection line 105.

[0089] 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 recessed portion 114 of the battery module 10 close to the battery management unit 200.

[0090] For example, there are two battery modules 10 arranged in a row, and the output connection line 105 of the battery module 10 far away from the battery management unit 200 is fixed in the recessed portion 114 of the battery module 10 close to the battery management unit 200, thereby isolating the output connection line 105 of the battery module 10 far away 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, and on the other hand, the sampling connection line 103 is installed using the recessed portion 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 10 from the direction close to the battery management unit 200 toward the direction away from the battery management unit 200. module, a second battery module and a third battery module, wherein 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 recessed portion 114 of the first battery module, and the output connection line 105 of the third battery module is installed in the recessed portions 114 of the first battery module and the second battery module, 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 separated from the output connection line 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, thereby improving the reliability of the energy storage device.

[0091] It is understandable 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 can also include other numbers of battery modules 10. The installation method of other numbers of battery modules 10 can be inferred based on the above content and will not be repeated here.

[0092] In some embodiments, the recessed portion 114 of one battery module 10 of two adjacent battery modules 10 arranged in a row is directly opposite to the output connector 102 of the other battery module 10 .

[0093] Similarly, taking two battery modules 10 arranged in a row as an example, the output connector 102 of the battery module 10 far away from the battery management unit 200 is directly opposite to the recessed portion 114 of the battery module 10 close to the battery management unit 200. Therefore, when the output connecting line 105 of the battery module 10 far away from the battery management unit 200 is installed in the recessed portion 114 of the battery module 10 close to the battery management unit 200, the bending of the output connecting line 105 can be avoided, the reliability of the output connecting line 105 can be improved, and abnormal problems caused by long-term bending of the output connecting line 105 can be avoided. At the same time, the cost of the energy storage device can be reduced, the length of the output connecting line 105 can be optimized, and unnecessary material waste can be reduced. At the same time, arranging it above the battery module 10 is more conducive to automated production line production, thereby reducing production costs.

[0094] Moreover, by controlling the output connector 102 of the battery module 10 away from the battery management unit 200 to face the recessed portion 114 of the battery module 10 close to the battery management unit 200, the interval between adjacent battery modules 10 can be reduced. If the output connector 102 of the battery module 10 away from the battery management unit 200 is misaligned with the recessed portion 114 of the battery module 10 close to the battery management unit 200, in order to install the output connecting line 105 in the recessed portion 114, the output connecting line 105 inevitably needs to be bent. In order to avoid abnormalities in the output connecting line 105 during the bending process, more installation space needs to be provided. Therefore, setting the output connector 102 of the battery module 10 away from the battery management unit 200 to face the recessed portion 114 of the battery module 10 close to the battery management unit 200 can also reduce the interval between adjacent battery modules 10, thereby improving the space utilization of the energy storage device.

[0095] In some embodiments, the module cover 104 also includes: at least one partition 124, the partition 124 is located in the recess 114, and the recess 114 is divided into a plurality of sub-recesses 134 spaced apart 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, and in the direction from close to 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 an arithmetic progression with a tolerance of 1.

[0096] Taking three battery modules 10 as an example, the three battery modules 10 are defined as the first battery module, the second battery module and the third battery module in the direction from close to the battery management unit 200 toward away from the battery management unit 200. The number of sub-recesses 134 of the first battery module is 2, the number of sub-recesses 134 of the second battery module is 1, and the number of sub-recesses 134 of the third battery module is 0. It can be understood that for the first battery module, the output connecting lines 105 of the second battery module and the third battery module will be installed on the first battery module, and the output connecting line 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 2 can facilitate the installation of the output connecting lines 105 of the second battery module and the third battery module.

[0097] In some embodiments, the module cover 104 further includes: at least one separator 124, located within the recess 114, dividing the recess 114 into a plurality of mutually spaced sub-recesses 134. For n battery modules 10 arranged in a row, the number of sub-recesses 134 on each battery module 10 is equal, and is n-1. For the battery module 10 closest to the battery management unit 200, the output sampling line of the remaining battery modules 10 needs to be installed on this battery module 10. Therefore, the number of sub-recesses 134 on the battery module 10 closest to the battery management unit 200 needs to be set to n-1. 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.

[0098] In the embodiment of the present disclosure, the wiring path of the output connecting wire 105 can be simplified, the space utilization rate of the energy storage device can be improved, and the top space of the battery module 10 can be fully utilized. The output connecting wire 105 does not need to occupy additional space, and the overall layout of the energy storage device is compact. Compared with the wiring method in the related art, it is more space-saving. More battery cells 110 can be arranged in the same space size, which can improve the energy density of the energy storage device.

[0099] Moreover, the sampling connection lines 103 and the output connection lines 105 of the battery modules 10 arranged in a row are separated by the module cover 104, which can reduce the electromagnetic interference between the two adjacent battery modules 10 and improve the accuracy and stability of their respective signal transmissions; on the other hand, arranging the output connection lines 105 above the battery module 10 helps to form a natural convection channel (in the related art, the output connection lines are arranged between the battery modules, and when the battery modules are heated, the output connection lines also release heat). After the output connection lines are arranged above the battery modules in the embodiment of the present disclosure, they are more spacious and conducive to heat dissipation, especially when working in a high temperature environment, the temperature of the battery module 10 can be better maintained within a reasonable range. The sampling connection lines 103 and the output connection lines 105 between the battery modules 10 are separated by the module cover 104, and the output connection lines 105 do not directly contact the heat source battery cell 110, reducing the risk of aging or damage due to local overheating.

[0100] During the installation of the sampling connection line 103 and the output connection line 105, the first wire bundle structure 171 and the second wire bundle structure 106 are provided, so that different connection lines can be arranged according to a predetermined path, making the installation process more standardized and easy to operate, and reducing the possibility of human error.

[0101] Those skilled in the art will appreciate that the above-described embodiments are specific examples for implementing the present disclosure, and in actual applications, various changes may be made to them in form and detail without departing from the spirit and scope of the embodiments of the present disclosure. Any person skilled in the art may make various changes and modifications without departing from the spirit and scope of the embodiments of the present disclosure. Therefore, the scope of protection of the embodiments of the present disclosure shall be based on the scope defined in the claims.

Claims

1. A battery module, characterized in that: include: A battery cell assembly, wherein the battery cell assembly includes N battery cells; A CCS assembly, the CCS assembly is fixed to the top surface of the battery cell assembly, the CCS assembly includes: an isolation plate, the isolation plate includes N rows of groove groups, the groove group includes 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 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 being electrically connected to the output connector and one of the battery cells, and the sampling connection line being fixed in the isolation slot; A module cover is fixed to the surface of the CCS assembly, and the module cover is provided with a recessed portion, which is used to fix the output connection lines of the battery modules on the same side along the arrangement direction of the battery modules.

2. The battery module according to claim 1, wherein: The module cover 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, wherein: The isolation plate further includes 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: An explosion-proof valve is provided on the battery core, 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 form a first accommodation space, and each of the first accommodation spaces is used to fix 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, wherein: The isolation plate is further 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 recessed in different directions, and the anchoring protrusion is engaged with the anchoring concave platform.

10. The battery module according to claim 1, wherein: The battery module further includes a baffle, 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.

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