Battery modules, energy storage devices and electrical equipment

Abstract

The present disclosure relates to the field of energy storage and provides a battery module, energy storage device, and electrical equipment. The battery module comprises: a cell assembly including N rows of cells; a CCS assembly fixed to the top surface of the cell assembly, the CCS assembly having a plurality of series aluminum bars, a first aluminum bar, and a second aluminum bar, the series aluminum bars being used to connect adjacent cells in series; a first end plate fixed to one side of the cell assembly along the direction in which the cells are arranged, the first end plate having a first anti-mistake recessed hole directly opposite the first aluminum bar, and the first end plate being made of an insulating material; an anti-mistake insert embedded in the first anti-mistake recessed hole and engaging with the first aluminum bar; and a second end plate fixed to the other side of the cell assembly along the direction in which the cells are arranged, the second end plate having a second anti-mistake recessed hole directly opposite the second aluminum bar, and the second end plate being made of an insulating material. This can improve the energy storage density 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, an energy storage device, and an electrical device. Background Art

[0002] Energy storage devices are devices that store and transfer electrical energy. They can be used in power systems to store excess energy during off-peak periods to supplement peak demand. Therefore, energy storage devices can both store excess power from a power generation system and deliver power to the grid during periods of low power generation.

[0003] Energy storage devices typically include a housing and multiple battery cells mounted within the housing. These cells are connected in series, parallel, or hybrid to store electrical energy. Currently, the volumetric energy density of energy storage devices is relatively low. Therefore, improving the volumetric energy density of energy storage devices is an urgent issue. Summary of the Invention

[0004] The embodiments of the present disclosure provide a battery module, an energy storage device, and an electrical device, which can at least improve the energy storage density of the battery module.

[0005] According to some embodiments of the present disclosure, on one hand, an embodiment of the present disclosure provides a battery module, comprising: a cell assembly, wherein the cell assembly comprises N rows of cell cells; a CCS assembly, wherein the CCS assembly is fixed on the top surface of the cell assembly, the CCS assembly is provided with a plurality of series aluminum bars, a first aluminum bar and a second aluminum bar, wherein the series aluminum bars are used to connect adjacent cell cells in series, the first aluminum bar is located on one side of the cell assembly along the cell arrangement direction, and the second aluminum bar is located on the other side of the cell assembly along the cell arrangement direction; a first end plate, wherein the first end plate is fixed on one side of the cell assembly along the cell arrangement direction, a first fool-proofing recess is provided on the first end plate, the first fool-proofing recess is opposite to the first aluminum bar, and the material of the first end plate is an insulating material; an fool-proofing insert, wherein the fool-proofing insert is embedded in the first fool-proofing recess and is snapped into contact with the first aluminum bar; a second end plate, wherein the second end plate is fixed on the other side of the cell assembly along the cell arrangement direction, a second fool-proofing recess is provided on the second end plate, the second fool-proofing recess is opposite to the second aluminum bar, and the material of the second end plate is an insulating material.

[0006] In some embodiments, a notch is provided on the first aluminum bar, a portion of the anti-foolproofing insert protrudes from the first anti-foolproofing recess, and a portion protruding from the first anti-foolproofing recess is engaged with the notch.

[0007] In some embodiments, the first end plate and / or the second end plate further include: transverse reinforcement ribs and longitudinal reinforcement ribs, and the transverse reinforcement ribs and the longitudinal reinforcement ribs are connected to each other.

[0008] In some embodiments, in the extension direction of the longitudinal reinforcing ribs, the arrangement density of the transverse reinforcing ribs gradually increases from both sides to the middle.

[0009] In some embodiments, the first end plate and / or the second end plate further comprises: a module hoisting hole, and the module hoisting hole is cylindrical.

[0010] In some embodiments, the arrangement density of the longitudinal reinforcing ribs connected to the module hoisting hole is greater than the arrangement density of the longitudinal reinforcing ribs on both sides of the module hoisting hole.

[0011] In some embodiments, the first end plate further includes: first mounting holes arranged at intervals, with some of the first aluminum bars embedded in the first mounting holes, and / or, the second end plate further includes: second mounting holes arranged at intervals, with some of the second aluminum bars embedded in the second mounting holes.

[0012] In some embodiments, the first end plate further includes: a fixing recessed hole, the fixing recessed hole being located at the top end of the first end plate, and the battery module further includes a wiring harness fixing structure, the wiring harness fixing structure passing through the fixing recessed hole and being clamped to the first end plate.

[0013] In some embodiments, the anti-delusion block includes: a first main body and a second main body, the first main body and the second main body extend in different directions, and the extension direction of the first main body and the second main body is different from the direction of the first end plate pointing to the battery cell assembly.

[0014] In some embodiments, the anti-fouling block further includes: a limiting protrusion, the limiting protrusion is located on the bottom surface of the second main body, and the thickness of the limiting protrusion gradually decreases in the direction approaching the battery core assembly.

[0015] In some embodiments, the battery module further includes: at least one strap, the strap surrounding the battery cell assembly, the first end plate, and the second end plate to fix the battery cell assembly, the first end plate, and the second end plate.

[0016] In some embodiments, the battery module further includes: buffer cotton, the buffer cotton is located between the first end plate and the battery cell assembly, and between the second end plate and the battery cell assembly, and the buffer cotton is directly opposite to the strap.

[0017] In some embodiments, the first end plate and / or the second end plate further include: a strap upper limit rib and a strap lower limit stop, the strap upper limit rib and the strap lower limit stop form an installation space, and the strap is clipped into the installation space.

[0018] According to some embodiments of the present disclosure, another aspect of the present disclosure further provides an energy storage device, a shell, wherein a housing space is provided in the shell; and a plurality of battery modules as described above, wherein the battery modules are located in the housing space.

[0019] According to some embodiments of the present disclosure, another aspect of the embodiments of the present disclosure further provides an electrical device, including the battery module as described above, or including the energy storage device as described above.

[0020] The technical solution provided by the embodiment of the present disclosure has at least the following advantages: on the one hand, setting the first end plate and the second end plate as insulating materials can reduce the setting of insulating sheets in the battery module, thereby improving the energy storage density of the battery module, and improving the space utilization of the battery module while completing the function of the end plate; on the other hand, an anti-mistake block and a first anti-mistake recess are provided at the corresponding position of the first aluminum bar, which can avoid the first aluminum bar and the second aluminum bar from being installed out of position during the installation process, and can prevent misalignment, so as to improve the reliability of the battery module installation. 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 A schematic diagram of a partial structure of a battery module provided in one embodiment of the present disclosure;

[0023] Figure 2 A schematic diagram of another partial structure of a battery module provided in one embodiment of the present disclosure;

[0024] Figure 3 A schematic diagram of another partial structure of a battery module provided in one embodiment of the present disclosure;

[0025] Figure 4 A structural diagram of a CCS component provided in one embodiment of the present disclosure;

[0026] Figure 5 A schematic structural diagram of a first end plate or a second end plate provided in one embodiment of the present disclosure;

[0027] Figure 6This is an enlarged structural diagram of a wiring harness fixing structure and a first end plate provided by an embodiment of the present disclosure;

[0028] Figure 7 A schematic structural diagram of a first fool-proof recessed hole provided in one embodiment of the present disclosure;

[0029] Figure 8 A structural schematic diagram of an anti-fouling insert provided in one embodiment of the present disclosure. DETAILED DESCRIPTION

[0030] As can be seen from the background, current battery modules typically include: a cell assembly, a cell insulation sheet, and an end plate. To ensure sufficient support strength, the end plate is typically made of conductive metal. The cell insulation sheet is positioned between the end plate and the cell assembly, insulating them from each other and preventing abnormal electrical conductivity. However, the installation of the insulation sheet complicates assembly of the battery module and increases costs.

[0031] The technical solution provided by the embodiment of the present disclosure has at least the following advantages: on the one hand, setting the first end plate and the second end plate as insulating materials can reduce the setting of insulating sheets in the battery module, thereby improving the energy storage density of the battery module, and improving the space utilization of the battery module while completing the function of the end plate; on the other hand, an anti-mistake block and a first anti-mistake recess are provided at the corresponding position of the first aluminum bar, which can avoid the first aluminum bar and the second aluminum bar from being installed out of position during the installation process, and can prevent misalignment, so as to improve the reliability of the battery module installation.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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).

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] refer to Figures 1 to 8 , Figure 1 A schematic diagram of a partial structure of a battery module provided in one embodiment of the present disclosure; Figure 2 A schematic diagram of another partial structure of a battery module provided in one embodiment of the present disclosure; Figure 3 A schematic diagram of another partial structure of a battery module provided in one embodiment of the present disclosure; Figure 4 A structural diagram of a CCS component provided in one embodiment of the present disclosure; Figure 5 A schematic structural diagram of a first end plate or a second end plate provided in one embodiment of the present disclosure; Figure 6 This is an enlarged structural diagram of a wiring harness fixing structure and a first end plate provided by an embodiment of the present disclosure; Figure 7 A schematic structural diagram of a first fool-proof recessed hole provided in one embodiment of the present disclosure; Figure 8 This is a structural diagram of an anti-fouling insert provided by an embodiment of the present disclosure. Figure 1 The diagram in FIG is a schematic diagram of a structure including a first end plate. Figure 2 FIG. 1 is a schematic diagram of a structure including a second end plate.

[0043] refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 In some embodiments, the battery module may include: a battery cell assembly 100 , and the battery cell assembly 100 includes N rows of battery cells 110 .

[0044] The battery module may 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 is provided with a plurality of series aluminum bars 111, a first aluminum bar 121 and a second aluminum bar 131, the series aluminum bar 111 is used to connect adjacent battery cells 110 in series, the first aluminum bar 121 is located on one side of the battery cell assembly 100 along the arrangement direction of the battery cells 110, and the second aluminum bar 131 is located on the other side of the battery cell assembly 100 along the arrangement direction of the battery cells 110.

[0045] The battery module may include: a first end plate 102, the first end plate 102 is fixed on one side of the battery cell assembly 100 along the arrangement direction of the battery cell 110, and a first anti-mistake recessed hole 112 is provided on the first end plate 102, the first anti-mistake recessed hole 112 is opposite to the first aluminum bar 121, and the material of the first end plate 102 is insulating material.

[0046] The battery module may include: an anti-foolproofing insert 103 , which is embedded in the first anti-foolproofing recess 112 and is clamped with the first aluminum bar 121 .

[0047] The battery module may include: a second end plate 104, the second end plate 104 is fixed on the other side of the battery cell assembly 100 along the arrangement direction of the battery cells 110, and a second anti-foolproof recess 114 is provided on the second end plate 104, the second anti-foolproof recess 114 is opposite to the second aluminum bar 131, and the material of the second end plate 104 is insulating material.

[0048] The technical solution provided by the embodiment of the present disclosure has at least the following advantages: on the one hand, setting the first end plate 102 and the second end plate 104 as insulating materials can reduce the setting of insulating sheets in the battery module, thereby improving the energy storage density of the battery module, and improving the space utilization of the battery module while completing the function of the end plate; on the other hand, an anti-mistake block 103 and a first anti-mistake recess 112 are provided at the corresponding position of the first aluminum bar 121, which can avoid the first aluminum bar 121 and the second aluminum bar 131 from being installed out of position during the installation process, and can prevent misalignment, so as to improve the reliability of the battery module installation.

[0049] 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.

[0050] In some embodiments, the battery cell 110 has an explosion-proof valve. When the temperature of the battery cell 110 exceeds a normal value, its internal pressure will increase rapidly. At this time, the battery cell 110 releases its internal pressure to the outside through the explosion-proof valve to reduce the possibility of explosion of the battery cell 110.

[0051] In some embodiments, the CCS assembly 101 may further include an isolation plate 141. The isolation plate 141 in the CCS assembly 101 is a structure that isolates the battery cell 110 from other structures. The groove 151 in the isolation plate 141 is used to install the series aluminum bar 111, the first aluminum bar 121 and the second aluminum bar 131. The remaining part covers the top surface of the battery cell 110 that is not covered by the series aluminum bar 111, thereby avoiding the battery cell 110 from being mistakenly connected to other structures and avoiding safety hazards such as short circuits.

[0052] For the series aluminum bar 111, the first aluminum bar 121, and the second aluminum bar 131, the groove 151 provides installation space for the series aluminum bar 111, the first aluminum bar 121, and the second aluminum bar 131, and plays a positioning role in the installation of the series aluminum bar 111, the first aluminum bar 121, and the second aluminum bar 131, thereby facilitating the improvement of the efficiency of the assembly of the series aluminum bar 111, the first aluminum bar 121, and the second aluminum bar 131 with the isolation plate 141. At the same time, the groove 151 also acts as a limiter for the series aluminum bar 111, the first aluminum bar 121, and the second aluminum bar 131, thereby improving the stability of the installation of the series aluminum bar 111, the first aluminum bar 121, and the second aluminum bar 131 on the isolation plate 141, thereby facilitating the improvement of the stability of the connection between the series aluminum bar 111, the first aluminum bar 121, and the second aluminum bar 131 and the battery cell 110 and the sampling connection line.

[0053] The groove 151 can be recessed along the thickness of the battery cell 110 toward the side closest to the battery cell assembly 100. The specific shape of the groove 151 is not limited and can have various shapes, such as an arcuate groove, a square groove, an oval groove with a notch, etc. In some embodiments, the groove 151 is an arcuate groove (arc-shaped groove should be understood broadly to include circular arc grooves, oval arc grooves, etc.), which facilitates vacuum molding and demolding.

[0054] For the battery cell 110, the battery cell 110 includes two output ports. The series aluminum bar 111 is used to connect one output port of each of the two adjacent battery cells 110 to connect the two adjacent battery cells 110 in series. The first aluminum bar 121 and the second aluminum bar 131 are respectively connected to one output port of a battery cell 110 as the positive output and the negative output.

[0055] The series-connected aluminum bar 111, the first aluminum bar 121 and the second aluminum bar 131 can be directly welded on the battery cell 110. The first aluminum bar 121 can be one of the positive aluminum bar or the negative aluminum bar, and the second aluminum bar 131 can be the other of the positive aluminum bar or the negative aluminum bar.

[0056] 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 aluminum bar 111 connects the positive terminal of the first battery cell and the negative terminal of the second battery cell, respectively. Another series aluminum bar 111 connects the positive terminal of the second battery cell and the negative terminal of the third battery cell, respectively. The negative terminal of the first battery cell is electrically connected to the second aluminum bar 131, and the positive terminal of the third battery cell is electrically connected to the first aluminum bar 121, 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 sequentially according to the above logic.

[0057] In some embodiments, the CCS (Cells Contact System) assembly 101 may further include sampling cables that monitor the voltage and temperature of each cell 110 in the cell assembly 100 and transmit the collected signals to a battery management system (not shown) to implement overcurrent protection and thermal runaway management for the cell assembly 100. The CCS assembly 101 may be fixedly connected to the cell assembly 100, and the number of CCS assemblies 101 may correspond to the number of cell assemblies 100.

[0058] The sampling connection wire can be welded to the series aluminum bar 111, the first aluminum bar 121, or the second aluminum bar 131 to achieve electrical connection with the series aluminum bar 111, the first aluminum bar 121, and the second aluminum bar 131, thereby facilitating the collection of various data from the battery cell 110. The sampling connection wire can be a copper conductor, an aluminum alloy conductor, a flexible printed circuit (FPC), or a printed circuit board (PCB).

[0059] In some embodiments, an isolation groove 161 is further provided on the isolation plate 141, and the sampling connection line is fixed in the isolation groove 161, thereby reducing the possibility of the sampling connection line sliding and deflecting on the isolation plate 141 or even falling off the CCS component 101, so as to ensure the stability of the connection of the sampling connection line, thereby facilitating the improvement of the reliability of the CCS component 101. The isolation groove 161 is used to provide routing space for the sampling connection lines of the same battery module, thereby improving the space utilization within the battery module.

[0060] Combined with reference Figure 1 and Figure 5 In some embodiments, the first end plate 102 is made of a polymer nanoplastic material, such as nano-polyolefin, nano-nylon, nano-polyester, or nano-polyoxymethylene. Polymer nanoplastic materials are relatively strong, and when formed into the first end plate 102, the first end plate 102 has a strong stress resistance, thereby providing both insulation and a certain degree of stress resistance.

[0061] In some embodiments, the first end plate 102 may further include transverse reinforcing ribs 105 and longitudinal reinforcing ribs 106, which are interconnected. The transverse reinforcing ribs 105 and longitudinal reinforcing ribs 106 can further enhance the supporting strength of the first end plate 102. The first end plate 102 can be used to prevent the battery cell assembly 100 from shifting due to vibration, impact, or long-term use, thereby improving the stability of the battery module.

[0062] In some embodiments, the arrangement density of the transverse reinforcing ribs 105 gradually increases from the sides toward the center in the direction of extension of the longitudinal reinforcing ribs 106. In other words, the arrangement density of the transverse reinforcing ribs 105 in the center of the first end plate 102 is greater. A higher density of transverse reinforcing ribs 105 further enhances the stress resistance of the center of the first end plate 102. For the first end plate 102, the center portion of the first end plate 102 is often subjected to greater stress. Therefore, increasing the arrangement density of the transverse reinforcing ribs 105 in the center portion can further improve the reliability of the battery module.

[0063] In some embodiments, the first end plate 102 further includes a cylindrical module hoisting hole 107. The module hoisting hole 107 is used to facilitate the installation of the battery module. By reserving the module hoisting hole 107 in advance to facilitate the installation of the battery module, the convenience of battery module installation can be improved.

[0064] In other embodiments, the module hoisting hole 107 may also have other shapes as long as the shape is convenient for matching with the hoisting machine.

[0065] In some embodiments, the arrangement density of the longitudinal reinforcing ribs 106 connected to the module hoisting hole 107 is greater than the arrangement density of the longitudinal reinforcing ribs 106 on both sides of the module hoisting hole 107. In other words, the arrangement density of the longitudinal reinforcing ribs 106 around the module hoisting hole 107 is greater. When the module hoisting hole 107 is in use, the stress around the module hoisting hole 107 is stronger. By providing a higher arrangement density of the longitudinal reinforcing ribs 106 around the module hoisting hole 107, the stress resistance of the module hoisting hole 107 during use can be increased, thereby preventing deformation of the module hoisting hole 107 and further improving the reliability of the module hoisting hole 107 and the first end plate 102.

[0066] In some embodiments, the first end plate 102 further includes spaced-apart first mounting holes 122, into which portions of the first aluminum bars 121 are inserted. The first aluminum bars 121 may be provided with protrusions corresponding to the first mounting holes 122, which are then mounted within the first mounting holes 122. The engagement of the protrusions and recesses facilitates positioning and installation of the first aluminum bars 121, thereby enhancing the convenience of battery module assembly.

[0067] refer to Figure 2 and Figure 6 In some embodiments, the battery module may further include: an output connector 108 , which is electrically connected to the sampling connection line, collects the electrical signals of the battery cells 110 obtained by all the sampling connection lines, and outputs them through the output connector 108 .

[0068] Continue to refer Figure 1 、 Figure 4 、 Figure 5 and Figure 6 , Figure 6 This is an enlarged structural schematic diagram of a wiring harness fixing structure and a first end plate provided in an embodiment of the present disclosure. In some embodiments, the first end plate 102 further includes: a fixing recessed hole 119, the fixing recessed hole 119 being located at the top of the first end plate 102, and the battery module further includes a wiring harness fixing structure 203, the wiring harness fixing structure 203 passing through the fixing recessed hole 119 and engaging with the first end plate 102. The wiring harness fixing structure 203 can be fixed to the first end plate 102 by the cooperation with the fixing recessed hole 119, and the sampling connection line can be limited by the wiring harness fixing structure 203, thereby facilitating the routing of the sampling connection line and improving the aesthetics of the battery module.

[0069] In some embodiments, the sampling connection line can be fixed to the first end plate 102 by a cable tie. In other embodiments, a cable bundle structure can be set in the CCS assembly 101. The cable bundle structure and the isolation groove 161 form a first accommodating space, and a sampling connection line is fixed in the first accommodating space.

[0070] Compared to fixing with cable ties, the cable tie structure can prevent the cable tie from interfering with the battery cell 110 when fixing the sampling connection line, thereby preventing the occurrence of blue film scratching on the surface of the battery cell 110, thereby improving the reliability of the battery module, thereby helping to extend the service life of the battery cell 110 and improving the reliability of the battery module. The cable tie structure also helps save space in the CCS assembly 101 and facilitates the arrangement of the CCS assembly 101 and the battery cell assembly 100 in the battery pack.

[0071] In some embodiments, a notch is provided in the first aluminum bar 121, and a portion of the anti-mash block 103 protrudes from the first anti-mash recess 112, with the portion protruding from the first anti-mash recess 112 interlocking with the notch. Controlling the anti-mash block 103 to protrude from the first anti-mash recess 112 prevents the second aluminum bar 131 from engaging with the anti-mash block 103 when the first aluminum bar 121 and the second aluminum bar 131 are misaligned. This prevents misalignment between the first and second aluminum bars 121, 131, and improves the reliability of the battery module.

[0072] In some embodiments, the first end plate 102 also includes: module fixing holes 204, which are located on both sides of the first end plate 102 perpendicular to the direction of battery cell arrangement. In other words, the module fixing holes 204 are located on both sides of the first end plate 102 along the vertical direction. Reserving module fixing holes 204 on the first end plate 102 can facilitate the assembly of the first end plate 102 and improve the convenience and reliability of installation of the first end plate 102.

[0073] refer to Figure 1 、 Figure 2 and Figure 5 In some embodiments, the battery module further includes at least one tie band 200, which surrounds the battery cell assembly 100, the first end plate 102, and the second end plate 104 to secure the battery cell assembly 100, the first end plate 102, and the second end plate 104. The tie band 200 secures the battery assembly, the first end plate 102, and the second end plate 104, thereby preventing relative movement of the battery module and reducing the overall size of the battery module, thereby improving the space utilization of the battery module.

[0074] In some embodiments, the battery module further includes a cushioning pad (not shown). The cushioning pad is positioned between the first end plate 102 and the battery cell assembly 100, and between the second end plate 104 and the battery cell assembly 100. The cushioning pad is aligned with the tie band 200. This alignment of the cushioning pad and the tie band 200 allows the cushioning pad to buffer stress during battery module installation, thereby reducing stress on the battery cell assembly 100 during battery module fixation and improving battery module reliability.

[0075] The term "facing" here means that the projection of the strap 200 on the surface of the buffer cotton is located inside the buffer cotton. The strap 200 will generate stress on the battery cell 110 during the process of fixing the battery cell assembly 100. The use of buffer cotton can improve the reliability of the battery module.

[0076] In some embodiments, there are multiple straps 200 , and multiple buffer cottons can be provided to correspond to the straps 200 to further improve the reliability of the battery module.

[0077] In some embodiments, the first end plate 102 further includes: a strap upper limit rib 201 and a strap lower limit platform 202. The strap upper limit rib 201 and the strap lower limit platform 202 enclose an installation space within which the strap 200 is secured. The strap upper limit rib 201 is used to limit the upper limit of movement of the strap 200, while the strap lower limit platform 202 is used to limit the lower limit of movement of the strap 200. This facilitates securing the strap 200 to the first end plate 102, thereby improving the convenience of battery module installation.

[0078] The upper limit rib 201 of the strap and the lower limit platform 202 of the strap are actually convex extensions and platforms protruding from the first end plate 102, which cooperate to complete the clamping of the strap by blocking up and down.

[0079] Combined with reference Figure 1 、 Figure 7 and Figure 8 In some embodiments, the structure of the first anti-fouling recess 112 may include: a first limiting baffle 132, the first limiting baffle 132 is used to limit the movement of the anti-fouling block 103 in the direction toward the battery cell assembly 100 and away from the battery cell assembly 100; a second limiting baffle 142, the second limiting baffle 142 is used to limit the movement of the anti-fouling block 103 in the direction perpendicular to the direction toward the battery cell assembly 100 and away from the battery cell assembly 100.

[0080] By utilizing the cooperation of the first limit baffle 132 and the second limit baffle 142, on the one hand, the installation of the anti-foolproofing block 103 can be facilitated, thereby avoiding the problem of the anti-foolproofing block 103 not being installed in place. On the other hand, after the anti-foolproofing block 103 is installed, the anti-foolproofing block 103 can be prevented from moving in the first anti-foolproofing recess 112, thereby avoiding the problem that the anti-foolproofing block 103 cannot correctly judge the installation of the first aluminum bar 121 and the second aluminum bar 131, thereby further improving the reliability of the battery module; moreover, the second limit baffle 142 is also located above the first limit baffle 132, and the cooperation between the second limit baffle 142 and the first limit baffle 132 can also limit the movement of the anti-foolproofing block 103 in the vertical direction.

[0081] In some embodiments, the anti-fouling block 103 may include: a first main body portion 113 and a second main body portion 123, the first main body portion 113 and the second main body portion 123 extend in different directions, and the extension direction of the first main body portion 113 and the second main body portion 123 is different from the direction of the first end plate 102 pointing to the battery cell assembly 100, and the first main body portion 113 is located above the second main body portion 123.

[0082] The anti-stupidity block 103 may also include: a limiting protrusion 133, which is located on the bottom surface of the second main body 123 and is used to cooperate with the first limiting baffle 132 after the anti-stupidity block 103 is installed to complete the limitation of the movement of the anti-stupidity block 103 in the direction toward and away from the battery cell assembly 100.

[0083] In some embodiments, the thickness of the limiting protrusion 133 gradually decreases in the direction toward the battery cell assembly 100. When installing the anti-fouling block 103, the side of the limiting protrusion 133 with a thinner thickness can be used to approach the battery cell assembly 100, which can facilitate the installation of the anti-fouling block 103.

[0084] The following will further explain the cooperation between the anti-fouling insert 103 and the first anti-fouling recess 112, refer to Figure 7 and Figure 8 The width of the first main body 113 is less than or equal to the gap between the second limiting baffle 142, thereby avoiding interference between the second limiting baffle 142 and the first main body 113, and the thickness of the second main body 123 is less than or equal to the gap between the first limiting baffle 132 and the second limiting baffle 142, thereby avoiding interference between the first limiting baffle 132 and the second limiting baffle 142 and the second main body 123. With the installation of the anti-foolproofing block 103, the limiting protrusion 133 is located in the first anti-foolproofing recess 112, thus completing the installation of the anti-foolproofing block 103.

[0085] After the installation is completed, due to the restrictions of the limiting protrusion 133, the second main body 123, the first limiting baffle 132 and the second limiting baffle 142, the anti-foolproofing block 103 will not fall out of the first anti-foolproofing recess 112. This is because the limiting protrusion 133 is located in the first anti-foolproofing recess 112. When the anti-foolproofing block 103 is taken out along the installation direction, the limiting protrusion 133 interferes with the first limiting baffle 132. If the anti-foolproofing block 103 needs to be removed, this interference needs to be eliminated. To eliminate the interference, the anti-foolproofing block 103 needs to be moved in the vertical direction. Due to the restrictions of the second main body 123, the first limiting baffle 132 and the second limiting baffle 142, when the anti-foolproofing block 103 is moved in the vertical direction, the second main body 123 will interfere with the first limiting baffle 132 and the second limiting baffle 142. Therefore, the anti-foolproofing block 103 will not fall out of the first anti-foolproofing recess 112.

[0086] In some embodiments, in the direction in which the first end plate 102 points to the battery cell assembly 100, the length of the first anti-foolproof recess 112 is equal to the length of the second main body 123, so that when the anti-foolproof insert 103 is installed, the movement of the anti-foolproof insert 103 in the direction toward and away from the battery cell assembly 100 can be restricted.

[0087] Combined with reference Figure 2 and Figure 5 In some embodiments, the second end plate 104 is made of a polymer nanoplastic material, such as nano-polyolefin, nano-nylon, nano-polyester, or nano-polyoxymethylene. Polymer nanoplastic materials are relatively strong, and when formed into the second end plate 104, the second end plate 104 has a strong stress resistance, thereby providing both insulation and a certain degree of stress resistance.

[0088] In some embodiments, the second end plate 104 may further include transverse reinforcing ribs 105 and longitudinal reinforcing ribs 106, which are interconnected. The transverse reinforcing ribs 105 and longitudinal reinforcing ribs 106 can further enhance the support strength of the second end plate 104. The second end plate 104 can prevent the battery cell assembly 100 from shifting due to vibration, impact, or long-term use, thereby improving the stability of the battery module.

[0089] In some embodiments, the arrangement density of the transverse reinforcing ribs 105 gradually increases from the sides toward the center along the extension direction of the longitudinal reinforcing ribs 106. In other words, the density of the transverse reinforcing ribs 105 in the middle of the second end plate 104 is greater. The higher density of transverse reinforcing ribs 105 further enhances the stress resistance of the middle portion of the second end plate 104. For the second end plate 104, the middle portion of the second end plate 104 is often subjected to greater stress. Therefore, increasing the arrangement density of the transverse reinforcing ribs 105 in the middle portion can further improve the reliability of the battery module.

[0090] In some embodiments, the second end plate 104 further includes a cylindrical module hoisting hole 107. The module hoisting hole 107 is used to facilitate the installation of the battery module. By reserving the module hoisting hole 107 in advance to facilitate the installation of the battery module, the convenience of battery module installation can be improved.

[0091] In some embodiments, the arrangement density of the longitudinal reinforcing ribs 106 connected to the module hoisting hole 107 is greater than the arrangement density of the longitudinal reinforcing ribs 106 on both sides of the module hoisting hole 107. In other words, the arrangement density of the longitudinal reinforcing ribs 106 around the module hoisting hole 107 is greater. When the module hoisting hole 107 is in use, the stress around the module hoisting hole 107 is stronger. By providing a greater arrangement density of the longitudinal reinforcing ribs 106 around the module hoisting hole 107, the stress resistance of the module hoisting hole 107 during use can be increased, thereby preventing deformation of the module hoisting hole 107 and further improving the reliability of the module hoisting hole 107 and the second end plate 104.

[0092] In some embodiments, the second end plate 104 further includes spaced second mounting holes 124, into which portions of the second aluminum bars 131 are embedded. The second aluminum bars 131 may be provided with protrusions corresponding to the second mounting holes 124, which are then mounted within the second mounting holes 124. The engagement between the protrusions and the recesses facilitates positioning and installation of the second aluminum bars 131, thereby enhancing the convenience of battery module assembly.

[0093] In some embodiments, the second end plate 104 may further include a fixing recessed hole 119 , which is also located at the top end of the second end plate 104 .

[0094] In some embodiments, a second anti-mistake recessed hole 114 can be provided on the second end plate 104, and there is no notch on the second aluminum bar 131. Even if the second aluminum bar 131 and the first aluminum bar 121 are installed misaligned, the second aluminum bar 131 cannot be installed due to the lack of a notch on the second aluminum bar 131. When the first aluminum bar 121 and the second aluminum bar 131 are installed misaligned, the second aluminum bar 131 cannot be correspondingly engaged with the anti-mistaken insert 103, thereby avoiding the installation misalignment of the first aluminum bar 121 and the second aluminum bar 131, thereby improving the reliability of the battery module.

[0095] In some embodiments, the second end plate 104 also includes: module fixing holes 204, which are located on both sides of the second end plate 104 perpendicular to the direction of battery cell arrangement. In other words, the module fixing holes 204 are located on both sides of the second end plate 104 along the vertical direction. Reserving module fixing holes 204 on the second end plate 104 can facilitate the assembly of the second end plate 104 and improve the convenience and reliability of the installation of the second end plate 104.

[0096] In some embodiments, the second end plate 104 further includes a strap upper limit rib 201 and a strap lower limit stop 202. The strap upper limit rib 201 and the strap lower limit stop 202 define an installation space within which the strap 200 is secured. The strap upper limit rib 201 limits the upper limit of movement of the strap 200, while the strap lower limit stop 202 limits the lower limit of movement of the strap 200. This facilitates securing the strap 200 to the second end plate 104, thereby enhancing the convenience of battery module installation.

[0097] In some embodiments, the structures of the first end plate 102 and the second end plate 104 may be the same, which may facilitate the production of the first end plate 102 and the second end plate 104 and improve the versatility of the entire battery module.

[0098] The technical solution provided by the embodiment of the present disclosure has at least the following advantages: on the one hand, setting the first end plate 102 and the second end plate 104 as insulating materials can reduce the setting of insulating sheets in the battery module, thereby improving the energy storage density of the battery module, and improving the space utilization of the battery module while completing the function of the end plate; on the other hand, an anti-mistake block 103 and a first anti-mistake recess 112 are provided at the corresponding position of the first aluminum bar 121, which can avoid the first aluminum bar 121 and the second aluminum bar 131 from being installed out of position during the installation process, and can prevent misalignment, so as to improve the reliability of the battery module installation.

[0099] 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. It should be noted that the parts that are the same or corresponding to the above embodiments can refer to the above embodiments and will not be repeated below.

[0100] In some embodiments, the energy storage device may include: a shell with a receiving space provided in the shell.

[0101] The energy storage device may further include: a plurality of battery modules as described above, wherein the battery modules are located in the accommodation space.

[0102] Since the energy people need is highly temporal and spatial, in order to rationally utilize energy and improve energy utilization, it is necessary to use a medium or device to store one form of energy in the same form or convert it into another form of energy, and then release it in a specific energy form based on future application needs. As we all know, to achieve the goal of carbon neutrality, the main way to generate green electricity is to develop green energy such as photovoltaics and wind power to replace fossil energy. Currently, the generation of green electricity generally relies on photovoltaics, wind power, hydropower, etc., but wind and solar energy are generally intermittent and volatile, which will cause grid instability, insufficient electricity during peak hours, and excessive electricity during low hours. Unstable voltage will also cause damage to electricity. Therefore, insufficient electricity demand or insufficient grid acceptance capacity may lead to the problem of "wind and solar power curtailment". To solve these problems, we must rely on energy storage. That is, electrical energy is converted into other forms of energy through physical or chemical means and stored, and then the energy is converted into electrical energy and released when needed. Simply put, energy storage is like a large "power bank". When there is sufficient photovoltaic and wind energy, electrical energy is stored and the stored electricity is released when needed.

[0103] Taking electrochemical energy storage as an example, this solution provides an energy storage device with a chemical battery inside. The device mainly uses the chemical elements in the chemical battery as the energy storage medium. The charging and discharging process is accompanied by chemical reactions or changes in the energy storage medium. Simply put, the electricity generated by wind and solar energy is stored in the chemical battery. When the use of external electricity reaches its peak, the stored electricity is released for use, or transferred to places where electricity is scarce for use.

[0104] Another embodiment of the present disclosure further provides an electrical device, which may include the battery module in some or all of the above embodiments, or the energy storage device in some or all of the above embodiments. It should be noted that the parts that are the same or corresponding to the above embodiments can refer to the above embodiments and will not be repeated below.

[0105] The power-consuming devices may also include, but are not limited to, portable devices such as Bluetooth headsets, mobile phones, digital devices, tablet computers, and large devices such as electric motorcycles, electric cars, and energy storage power stations, which are not limited in the present embodiment. The energy storage device provides power to the power-consuming devices.

[0106] 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, the battery cell assembly comprising N rows of battery cells; A CCS assembly, wherein the CCS assembly is fixed to the top surface of the battery cell assembly, and the CCS assembly is provided with a plurality of series aluminum bars, a first aluminum bar, and a second aluminum bar, wherein the series aluminum bars are used to connect adjacent battery cells in series, the first aluminum bar is located on one side of the battery cell assembly along the battery cell arrangement direction, and the second aluminum bar is located on the other side of the battery cell assembly along the battery cell arrangement direction; A first end plate, the first end plate is fixed to one side of the battery cell assembly along the battery cell arrangement direction, the first end plate is provided with a first fool-proof recessed hole, the first fool-proof recessed hole is directly opposite to the first aluminum bar, and the material of the first end plate is an insulating material; An anti-foolproof insert, the anti-foolproof insert being embedded in the first anti-foolproof recess and connected to the first aluminum bar; A second end plate, the second end plate is fixed to the other side of the battery cell assembly along the battery cell arrangement direction, the second end plate is provided with a second fool-proof recessed hole, the second fool-proof recessed hole is opposite to the second aluminum bar, and the material of the second end plate is an insulating material; The anti-foolproof insert includes: a first main body portion and a second main body portion, the first main body portion and the second main body portion extending in different directions, and the extending direction of the first main body portion and the second main body portion is different from the direction of the first end plate pointing to the battery cell assembly, the first main body portion is located above the second main body portion, and the first main body portion protrudes from the first anti-foolproof recessed hole, the first aluminum bar is provided with a notch, and the portion of the first main body portion protruding from the first anti-foolproof recessed hole is engaged with the notch; The first fool-proof recess includes: a first limit baffle, the first limit baffle is used to limit the first main body; a second limit baffle, the second limit baffle cooperates with the first limit baffle to limit the second main body; The second aluminum bar is not provided with a notch.

2. The battery module according to claim 1, wherein: The first end plate and / or the second end plate further include: transverse reinforcing ribs and longitudinal reinforcing ribs, and the transverse reinforcing ribs and the longitudinal reinforcing ribs are connected to each other.

3. The battery module according to claim 2, characterized in that: In the extension direction of the longitudinal reinforcing ribs, the arrangement density of the transverse reinforcing ribs gradually increases from both sides to the middle.

4. The battery module according to claim 2, wherein: The first end plate and / or the second end plate further include: a module hoisting hole, and the module hoisting hole is cylindrical.

5. The battery module according to claim 4, characterized in that: The arrangement density of the longitudinal reinforcing ribs connected to the module hoisting hole is greater than the arrangement density of the longitudinal reinforcing ribs on both sides of the module hoisting hole.

6. The battery module according to claim 1, characterized in that: The first end plate further includes: first mounting holes arranged at intervals, with some of the first aluminum bars embedded in the first mounting holes, and / or the second end plate further includes: second mounting holes arranged at intervals, with some of the second aluminum bars embedded in the second mounting holes.

7. The battery module according to claim 1, characterized in that: The first end plate further includes: a fixing concave hole, which is located at the top end of the first end plate. The battery module further includes a wire harness fixing structure, which passes through the fixing concave hole and is clamped with the first end plate.

8. The battery module according to claim 1, wherein: The anti-fouling block further includes: a limiting protrusion, which is located on the bottom surface of the second main body portion, and the thickness of the limiting protrusion gradually decreases in the direction approaching the battery core assembly.

9. The battery module according to claim 1, wherein: The battery module further includes: at least one strap, which surrounds the battery cell assembly, the first end plate, and the second end plate to fix the battery cell assembly, the first end plate, and the second end plate.

10. The battery module according to claim 9, characterized in that: The battery module further includes: buffer cotton, which is located between the first end plate and the battery cell assembly, and between the second end plate and the battery cell assembly, and the buffer cotton is directly opposite to the strap.

11. The battery module according to claim 9, characterized in that: The first end plate and / or the second end plate further include: a strap upper limit rib and a strap lower limit stop, wherein the strap upper limit rib and the strap lower limit stop form an installation space, and the strap is clamped in the installation space.

12. 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 11, wherein the battery modules are located in the accommodating space.

13. An electrical device, characterized in that: Comprising the battery module according to any one of claims 1 to 11, or comprising the energy storage device according to claim 12.

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