Battery module, energy storage device and electric equipment

Abstract

The invention relates to the field of energy storage, and provides a battery module, an energy storage device and electric equipment, and the battery module comprises a battery cell assembly comprising N rows of battery cells; the CCS assembly is fixed on the top surface of the battery cell assembly, the CCS assembly is provided with a plurality of series aluminum bars, first aluminum bars and second aluminum bars, and the series aluminum bars are used for connecting adjacent battery cells in series; the first end plate is fixed on one side of the battery cell assembly along the battery cell arrangement direction, a first fool-proof concave hole is formed in the first end plate, the first fool-proof concave hole is opposite to the first aluminum bar, and the first end plate is made of an insulating material; the fool-proof embedded block is embedded into the first fool-proof concave hole and is clamped with the first aluminum bar; the second end plate is fixed on the other side of the battery cell assembly along the battery cell arrangement direction, a second fool-proof concave hole is formed in the second end plate, the second fool-proof concave hole is opposite to the second aluminum bar, and the second end plate is made of an insulating material. The energy storage density of the battery module can be improved.

Description

Technical Field

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

[0002] An energy storage device is a device for storing and transferring electric energy. The energy storage device can be used in a power system, and the surplus electric energy during the off-peak period of electricity consumption can be stored through the energy storage device to supplement the electricity consumption during the peak period of electricity consumption. Therefore, the energy storage device can not only store the excessive generated electricity of the power generation system, but also transmit electric energy to the power grid when the generated electricity of the power generation system is low.

[0003] An energy storage device generally includes a box body and a plurality of battery cells arranged inside the box body. The plurality of battery cells are connected in series, parallel, or in a hybrid connection to store electric energy. At present, the volumetric energy density of the energy storage device is relatively low. Therefore, how to improve the volumetric energy density of the energy storage device is an urgent problem to be solved. Summary of the Invention

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

[0005] According to some embodiments of the present disclosure, on the one hand, a battery module is provided, including: a cell assembly, the cell assembly including N rows of cells; a CCS assembly, the CCS assembly being fixed on the top surface of the cell assembly, the CCS assembly being provided with a plurality of series aluminum bars, a first aluminum bar, and a second aluminum bar, the series aluminum bars being used for connecting adjacent cells in series, the first aluminum bar being located on one side of the cell assembly along the cell arrangement direction, and the second aluminum bar being located on the other side of the cell assembly along the cell arrangement direction; a first end plate, the first end plate being fixed on one side of the cell assembly along the cell arrangement direction, the first end plate being provided with a first anti-fooling concave hole, the first anti-fooling concave hole being opposite to the first aluminum bar, and the material of the first end plate being an insulating material; an anti-fooling insert block, the anti-fooling insert block being embedded in the first anti-fooling concave hole and being clamped with the first aluminum bar; a second end plate, the second end plate being fixed on the other side of the cell assembly along the cell arrangement direction, the second end plate being provided with a second anti-fooling concave hole, the second anti-fooling concave hole being opposite to the second aluminum bar, and the material of the second end plate being an insulating material.

[0006] In some embodiments, the first aluminum bar is provided with a notch, and a part of the anti-fooling insert block protrudes from the first anti-fooling concave hole, and the part protruding from the first anti-fooling concave hole is engaged with the notch.

[0007] In some embodiments, the first end plate and / or the second end plate further includes: a transverse reinforcing rib and a longitudinal reinforcing rib, the transverse reinforcing rib and the longitudinal reinforcing rib being connected to each other.

[0008] In some embodiments, in the extending direction of the longitudinal stiffeners, the arrangement density of the transverse stiffeners gradually increases from both sides towards the middle.

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

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

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

[0012] In some embodiments, the first end plate further includes: a fixing concave hole, the fixing concave hole is located at the top end of the first end plate, and the battery module further includes a wire harness fixing structure, and the wire harness fixing structure passes through the fixing concave hole and is snap-connected to the first end plate.

[0013] In some embodiments, the anti-fooling insert block includes: a first main body portion and a second main body portion, the first main body portion and the second main body portion extend in different directions, and the extending directions of the first main body portion and the second main body portion are different from the direction from the first end plate to the battery cell assembly.

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

[0015] In some embodiments, the battery module further includes: at least one cable tie, and the cable tie 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.

[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 opposite to the cable tie.

[0017] In some embodiments, the first end plate and / or the second end plate further includes: a cable tie upper limit rib and a cable tie lower limit stop, and the cable tie upper limit rib and the cable tie lower limit stop enclose an installation space, and the cable tie is snap-connected in the installation space.

[0018] According to some embodiments of the present disclosure, on the other hand, an energy storage device is further provided, including a housing having an accommodation space therein; and a plurality of battery modules as described above, located in the accommodation space.

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

[0020] The technical solutions provided by the embodiments of the present disclosure have 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 increasing the space utilization rate of the battery module while fulfilling the function of the end plate; on the other hand, a foolproof insert block and a first foolproof concave hole are provided at the corresponding position of the first aluminum bar, which can prevent the misalignment of the first aluminum bar and the second aluminum bar during the installation process of the first aluminum bar and the second aluminum bar, and can prevent mistakes 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 exemplary illustrations do not constitute a limitation on the embodiments unless otherwise stated. The drawings in the figures do not constitute a scale limitation; in order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the drawings required to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a partial structural schematic diagram of a battery module provided by an embodiment of the present disclosure; Figure 2 It is another partial structural schematic diagram of a battery module provided by an embodiment of the present disclosure; Figure 3 It is yet another partial structural schematic diagram of a battery module provided by an embodiment of the present disclosure; Figure 4 It is a structural schematic diagram of a CCS component provided by an embodiment of the present disclosure; Figure 5 It is a structural schematic diagram of a first end plate or a second end plate provided by an embodiment of the present disclosure; Figure 6 It is an enlarged structural schematic diagram of the cooperation between a wire harness fixing structure and the first end plate provided by an embodiment of the present disclosure; Figure 7 It is a structural schematic diagram of a first foolproof concave hole provided by an embodiment of the present disclosure; Figure 8 A structural schematic diagram of a foolproof insert block provided by an embodiment of the present disclosure. Detailed implementation manners

[0023] As can be seen from the background art, current battery modules generally include: a battery cell assembly, a battery cell insulating sheet, and an end plate. Among them, in order to enable the end plate to have a certain support strength, the end plate is usually made of metal and can conduct electricity. The battery cell insulating sheet is disposed between the end plate and the battery cell assembly, and insulates the end plate and the battery cell assembly from each other to avoid abnormal conduction. However, setting the insulating sheet will make the assembly of the battery module cumbersome and costly.

[0024] The technical solutions provided by the embodiments of the present disclosure have 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 rate of the battery module while completing the function of the end plate; on the other hand, a foolproof insert block and a first foolproof concave hole are provided at the corresponding position of the first aluminum bar, which can prevent the first aluminum bar and the second aluminum bar from being installed misaligned during the installation of the first aluminum bar and the second aluminum bar, and can prevent mistakes to improve the reliability of the installation of the battery module.

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

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

[0027] In the description of the embodiments of the present disclosure, the term "and / or" is only a description of the association relationship of the associated objects, indicating that three relationships can exist. For example, A and / or B can represent: the existence of A, the simultaneous existence of A and B, and the existence of B. In addition, the character " / " in this article generally represents an "or" relationship between the front and rear associated objects.

[0028] In the description of the embodiments of the present disclosure, the term "a plurality" 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).

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

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

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

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

[0033] The terms used in the description of the various embodiments herein are for the purpose of describing particular embodiments only and are not intended to be limiting. As used in the description of the various embodiments and the appended claims, "the component" is also intended to include the plural form unless the context clearly dictates otherwise. Among them, the component includes components such as layers, films, regions, or plates.

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

[0035] Reference Figures 1 to 8 , Figure 1 is a partial structural schematic diagram of a battery module provided by an embodiment of the present disclosure; Figure 2 is another partial structural schematic diagram of a battery module provided by an embodiment of the present disclosure; Figure 3 is yet another partial structural schematic diagram of a battery module provided by an embodiment of the present disclosure; Figure 4 is a structural schematic diagram of a CCS component provided by an embodiment of the present disclosure; Figure 5 is a structural schematic diagram of a first end plate or a second end plate provided by an embodiment of the present disclosure; Figure 6 is an enlarged structural schematic diagram of the cooperation between a wire harness fixing structure and the first end plate provided by an embodiment of the present disclosure; Figure 7 is a structural schematic diagram of a first anti-fooling concave hole provided by an embodiment of the present disclosure; Figure 8 is a structural schematic diagram of an anti-fooling insert block provided by an embodiment of the present disclosure. Among them, Figure 1 the schematic diagram shows a structural schematic diagram containing the first end plate, Figure 2 the schematic diagram shows a structural schematic diagram containing the second end plate.

[0036] Reference 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.

[0037] The battery module may include: a CCS component 101, the CCS component 101 is fixed on the top surface of the battery cell component 100, the CCS component 101 is provided with a plurality of series-connected aluminum bars 111, a first aluminum bar 121, and a second aluminum bar 131. The series-connected aluminum bars 111 are used to connect adjacent battery cells 110 in series. The first aluminum bar 121 is located on one side of the battery cell component 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 component 100 along the arrangement direction of the battery cells 110.

[0038] The battery module may include: a first end plate 102, the first end plate 102 is fixed on one side of the battery cell component 100 along the arrangement direction of the battery cells 110. The first end plate 102 is provided with a first anti-fooling concave hole 112, the first anti-fooling concave hole 112 is aligned with the first aluminum bar 121, and the material of the first end plate 102 is an insulating material.

[0039] The battery module may include: an anti-fooling insert 103, the anti-fooling insert 103 is embedded in the first anti-fooling concave hole 112 and is clamped with the first aluminum bar 121.

[0040] 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 component 100 along the arrangement direction of the battery cells 110. The second end plate 104 is provided with a second anti-fooling concave hole 114, the second anti-fooling concave hole 114 is aligned with the second aluminum bar 131, and the material of the second end plate 104 is an insulating material.

[0041] The technical solution provided by the embodiments 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 rate of the battery module while completing the function of the end plate; on the other hand, the cooperation of the anti-fooling insert 103 and the first anti-fooling concave hole 112 is provided at the corresponding position of the first aluminum bar 121, which can prevent the misalignment of the first aluminum bar 121 and the second aluminum bar 131 during the installation process of the first aluminum bar 121 and the second aluminum bar 131, and can prevent misoperation to improve the reliability of the installation of the battery module.

[0042] The number of battery cells 110 in the battery cell component 100 can be selected according to the output power required by the battery module. The higher the output power required by the battery module, the more the number of battery cells 110 can be.

[0043] In some embodiments, the battery cell 110 has an explosion-proof valve. When the temperature of the battery cell 110 exceeds the normal value, its internal pressure will also increase rapidly. At this time, the battery cell 110 releases the pressure inside itself to the outside through the explosion-proof valve to reduce the possibility of the battery cell 110 exploding.

[0044] In some embodiments, the CCS component 101 may further include a separator plate 141. The separator plate 141 in the CCS component 101 is a structure that separates the battery cell 110 from other structures. The groove 151 in the separator plate 141 is used to install the series aluminum bar 111, the first aluminum bar 121, and the second aluminum bar 131, and the rest covers the top surface of the battery cell 110 not covered by the series aluminum bar 111, thereby avoiding the situation of misconnection between the battery cell 110 and other structures and avoiding safety hazards such as short circuits.

[0045] For the series aluminum bar 111, the first aluminum bar 121, and the second aluminum bar 131, the groove 151 provides an 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 assembly efficiency of the series aluminum bar 111, the first aluminum bar 121, and the second aluminum bar 131 with the separator plate 141. At the same time, the groove 151 also plays a limiting role in the series aluminum bar 111, the first aluminum bar 121, and the second aluminum bar 131 to improve the installation stability of the series aluminum bar 111, the first aluminum bar 121, and the second aluminum bar 131 on the separator plate 141, thereby facilitating the improvement of the connection stability 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 wire.

[0046] The groove 151 may be recessed toward the side close to the battery cell assembly 100 in the thickness direction of the battery cell 110. The specific shape of the groove 151 is not limited and can have various shapes, such as an arc groove, a square groove, an elliptical groove with a notch, etc. In some embodiments, the groove 151 is an arc groove (the arc groove should be understood in a broad sense, including an arc groove and an elliptical arc groove), and the arc groove is easy to be formed by thermoforming and demoulded.

[0047] 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 two adjacent battery cells 110 to connect the two adjacent battery cells 110 in series, and 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.

[0048] The series aluminum bar 111, the first aluminum bar 121, and the second aluminum bar 131 can be directly welded to 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.

[0049] Further, taking the battery cell assembly 100 with three battery cells 110 as an example, the battery cell assembly 100 includes a first battery cell, a second battery cell and a third battery cell respectively. Each battery cell 110 includes a positive terminal and a negative terminal. A series aluminum bar 111 is respectively connected to the positive terminal of a first battery cell and the negative terminal of the second battery cell, and then is respectively connected to the positive terminal of the second battery cell and the negative terminal of the third battery cell through another series aluminum bar 111. 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 electrode output and the negative electrode output respectively. It can be understood that when the battery cell assembly 100 has other numbers of battery cells 110, the connection sequence can be deduced in turn according to the above logic.

[0050] In some embodiments, the CCS (Cells Contact System, integrated busbar) assembly 101 may further include sampling connection lines. The sampling connection lines can monitor the voltage and temperature of each battery cell 110 of the battery cell assembly 100, and can transmit the collected signals to a battery management system (not shown in the figure) to achieve overcurrent protection and thermal runaway management of the battery cell assembly 100. The CCS assembly 101 can be fixedly connected to the battery cell assembly 100, and the number of the CCS assemblies 101 can correspond to the number of the battery cell assemblies 100.

[0051] The sampling connection lines 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, so as to facilitate the collection of various data of the battery cell 110. The sampling connection lines can be copper wires, aluminum alloy wires, flexible printed circuits (FPC) or printed circuit boards (PCB).

[0052] In some embodiments, an isolation groove 161 is further provided on the isolation plate 141. The sampling connection lines are fixed in the isolation groove 161, thereby reducing the possibility that the sampling connection lines slide and shift on the isolation plate 141 or even fall off from the CCS assembly 101, ensuring the stability of the connection of the sampling connection lines, and thus being beneficial to improving the reliability of the CCS assembly 101. Using the isolation groove 161 to provide a routing space for the sampling connection lines of the same battery module can improve the space utilization rate within the battery module.

[0053] Combined with reference to Figure 1 and Figure 5, in some embodiments, the material of the first end plate 102 is a polymer nano-plastic material, such as nano-polyolefin, nano-nylon, nano-polyester, nano-polyoxymethylene, etc. The polymer nano-plastic material has relatively high strength. After the first end plate 102 is formed, the first end plate 102 has a relatively strong anti-stress effect, thereby completing the insulation while providing a certain anti-stress effect.

[0054] In some embodiments, the first end plate 102 may further include: a transverse reinforcing rib 105 and a longitudinal reinforcing rib 106, and the transverse reinforcing rib 105 is connected to the longitudinal reinforcing rib 106. The use of the transverse reinforcing rib 105 and the longitudinal reinforcing rib 106 can further improve the support strength of the first end plate 102. The first end plate 102 can be used to prevent the displacement of the battery cell assembly 100 during vibration, impact or long-term use, and can improve the stability of the battery module.

[0055] In some embodiments, in the extending direction of the longitudinal reinforcing rib 106, the arrangement density of the transverse reinforcing ribs 105 gradually increases from both sides to the middle. In other words, the arrangement density of the transverse reinforcing ribs 105 at the middle position of the first end plate 102 is greater. The transverse reinforcing ribs 105 with a greater arrangement density will further improve the anti-stress effect at the middle position of the first end plate 102. For the first end plate 102, the middle part of the first end plate 102 is often subjected to greater stress. Therefore, by increasing the arrangement density of the transverse reinforcing ribs 105 in the middle part, the reliability of the battery module can be further improved.

[0056] In some embodiments, the first end plate 102 further includes: a module lifting hole 107, and the module lifting hole 107 is cylindrical. The module lifting hole 107 is used to facilitate the installation of the battery module. By pre-reserving the module lifting hole 107, the installation of the battery module can be facilitated, thereby improving the convenience of the battery module installation.

[0057] In some other embodiments, the module lifting hole 107 may also be in other shapes, as long as the shape is convenient for cooperating with the lifting machine.

[0058] In some embodiments, the arrangement density of the longitudinal reinforcing ribs 106 connected to the module lifting hole 107 is greater than the arrangement density of the longitudinal reinforcing ribs 106 on both sides of the module lifting hole 107. In other words, the arrangement density of the longitudinal reinforcing ribs 106 around the module lifting hole 107 is greater. When the module lifting hole 107 is used, the stress around the module lifting hole 107 is relatively strong. By setting the arrangement density of the longitudinal reinforcing ribs 106 around the module lifting hole 107 to be greater, the anti-stress effect of the module lifting hole 107 during use can also be improved, thereby avoiding the deformation of the module lifting hole 107 and further improving the reliability of the module lifting hole 107 and the first end plate 102.

[0059] In some embodiments, the first end plate 102 further includes: first mounting holes 122 arranged at intervals, and a part of the first aluminum bars 121 are embedded in the first mounting holes 122. For the first aluminum bars 121, protrusions corresponding to the first mounting holes 122 can be provided, and these protrusions are installed in the first mounting holes 122. Through the snap connection of the protrusions and recesses, the positioning and installation of the first aluminum bars 121 can be facilitated, thereby improving the convenience of assembling the battery module.

[0060] Reference Figure 2 and Figure 6 , in some embodiments, the battery module may further include: an output connector 108, the output connector 108 is electrically connected to the sampling connection wires, collects the electrical signals of the battery cells 110 obtained by all the sampling connection wires, and outputs them via the output connector 108.

[0061] Continue to refer to Figure 1 , Figure 4 , Figure 5 and Figure 6 , Figure 6 FIG. is an enlarged schematic structural view of the cooperation between a wire harness fixing structure and the first end plate provided in an embodiment of the present disclosure. In some embodiments, the first end plate 102 further includes: a fixing concave hole 119, the fixing concave hole 119 is located at the top of the first end plate 102, and the battery module further includes a wire harness fixing structure 203, the wire harness fixing structure 203 passes through the fixing concave hole 119 and is snap-connected to the first end plate 102. Through the cooperation of the wire harness fixing structure 203 and the fixing concave hole 119, the wire harness fixing structure can be fixed on the first end plate 102, and the sampling connection wires can be limited through the wire harness fixing structure 203, thereby facilitating the routing of the sampling connection wires and improving the aesthetics of the battery module.

[0062] In some embodiments, the sampling connection wires can be fixed to the first end plate 102 through cable ties. In other embodiments, a wire bundling structure can also be provided in the CCS component 101. The wire bundling structure and the isolation groove 161 enclose a first accommodation space, and one sampling connection wire is fixed in the first accommodation space.

[0063] Compared with the method of fixing through cable ties, the method of using the wire bundling structure can avoid the interference between the cable ties and the battery cells 110 when fixing the sampling connection wires, thereby avoiding the situation of scratching the blue film on the surface of the battery cells 110, thereby improving the reliability of the battery module, which is beneficial to extending the service life of the battery cells 110 and improving the reliability of the battery module. The method of setting the wire bundling structure is also beneficial to saving the space of the CCS component 101 and facilitating the arrangement of the CCS component 101 and the battery cell component 100 in the battery pack.

[0064] In some embodiments, the first aluminum strip 121 is provided with a notch, and part of the anti-fooling insert block 103 protrudes from the first anti-fooling concave hole 112, and the part protruding from the first anti-fooling concave hole 112 is engaged with the notch. By controlling the anti-fooling insert block 103 to protrude from the first anti-fooling concave hole 112, when the first aluminum strip 121 and the second aluminum strip 131 are installed out of alignment, the second aluminum strip 131 cannot be correspondingly clamped with the anti-fooling insert block 103, so that the misalignment of the first aluminum strip 121 and the second aluminum strip 131 can be avoided, thereby improving the reliability of the battery module.

[0065] In some embodiments, the first end plate 102 further includes: module fixing holes 204, and the module fixing holes 204 are located on both sides of the first end plate 102 along the direction perpendicular to the arrangement direction of the battery cells. In other words, the module fixing holes 204 are located on both sides of the first end plate 102 along the vertical direction. Providing the 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 the installation of the first end plate 102.

[0066] Reference Figure 1 、 Figure 2 and Figure 5 In some embodiments, the battery module further includes: at least one tie strap 200, and the tie strap 200 surrounds the battery cell assembly 100, the first end plate 102 and the second end plate 104 to fix the battery cell assembly 100, the first end plate 102 and the second end plate 104. The tie strap 200 can be used to fix the battery assembly, the first end plate 102 and the second end plate 104, so as to prevent the battery modules from moving relative to each other, and can reduce the overall size of the battery module, thereby improving the space utilization rate of the battery module.

[0067] In some embodiments, the battery module further includes: a buffer cotton (not shown), and the buffer cotton is located between the first end plate 102 and the battery cell assembly 100, and is also located between the second end plate 104 and the battery cell assembly 100, and the buffer cotton is aligned with the tie strap 200. By aligning the buffer cotton with the tie strap 200, during the installation of the battery module, the stress of the battery module can be buffered by the buffer cotton, thereby reducing the stress on the battery cell assembly 100 during the fixing of the battery module, and thus improving the reliability of the battery module.

[0068] Here, the alignment means that the orthographic projection of the tie strap 200 on the surface of the buffer cotton is located within the buffer cotton. For the tie strap 200, during the process of fixing the battery cell assembly 100, stress will be generated on the battery cells 110, and the buffer cotton can be used to improve the reliability of the battery module.

[0069] In some embodiments, the number of the tie straps 200 is multiple, and multiple buffer cottons can be provided corresponding to the tie straps 200 to further improve the reliability of the battery module.

[0070] In some embodiments, the first end plate 102 further includes: a strap upper limit rib 201 and a strap lower limit retaining platform 202. The strap upper limit rib 201 and the strap lower limit retaining platform 202 enclose an installation space, and the strap 200 is snap-fitted in the installation space. The strap upper limit rib 201 is used to limit the upper limit of the movement of the strap 200, and the strap lower limit retaining platform 202 is used to limit the lower limit of the movement of the strap 200, so as to facilitate snap-fitting the strap 200 onto the first end plate 102, thereby improving the convenience of installing the battery module.

[0071] The strap upper limit rib 201 and the strap lower limit retaining platform 202 are actually convex extensions and platforms protruding from the first end plate 102, and the snap-fitting of the strap is completed through the cooperation of upper and lower blocking.

[0072] With reference to Figure 1 、 Figure 7 and Figure 8 In some embodiments, the structure of the first anti-fooling concave hole 112 may include: a first limit baffle 132, and the first limit baffle 132 is used to limit the movement of the anti-fooling insert 103 in the directions of approaching and departing from the battery cell assembly 100; a second limit baffle 142, and the second limit baffle 142 is used to limit the movement of the anti-fooling insert 103 in a direction perpendicular to the directions of approaching and departing from the battery cell assembly 100.

[0073] By the cooperation of the first limit baffle 132 and the second limit baffle 142, on the one hand, it is convenient to install the anti-fooling insert 103, thereby avoiding the problem of incomplete installation of the anti-fooling insert 103. On the other hand, after the anti-fooling insert 103 is installed, it can also prevent the anti-fooling insert 103 from moving within the first anti-fooling concave hole 112, thereby avoiding the problem that the anti-fooling insert 103 cannot correctly judge the installation of the first aluminum bar 121 and the second aluminum bar 131, and thus the reliability of the battery module can be further improved; 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-fooling insert 103 in the vertical direction.

[0074] In some embodiments, the anti-fooling insert 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 extending directions of the first main body portion 113 and the second main body portion 123 are different from the direction from the first end plate 102 to the battery cell assembly 100, and the first main body portion 113 is located above the second main body portion 123.

[0075] The anti-fooling insert block 103 may further include: a limiting protrusion 133, which is located on the bottom surface of the second main body portion 123 and is used to cooperate with the first limiting baffle 132 after the anti-fooling insert block 103 is installed to complete the limitation of the movement of the anti-fooling insert block 103 in the directions approaching and away from the battery cell assembly 100.

[0076] In some embodiments, the thickness of the limiting protrusion 133 gradually decreases in the direction approaching the battery cell assembly 100. When installing the anti-fooling insert block 103, the side of the limiting protrusion 133 with a thinner thickness can be used to approach the battery cell assembly 100, which is convenient for installing the anti-fooling insert block 103.

[0077] The cooperation between the anti-fooling insert block 103 and the first anti-fooling concave hole 112 will be further described below. Refer to Figure 7 and Figure 8 , the width of the first main body portion 113 is less than or equal to the gap between the second limiting baffles 142, so as to avoid interference between the second limiting baffles 142 and the first main body portion 113. The thickness of the second main body portion 123 is less than or equal to the gap between the first limiting baffle 132 and the second limiting baffle 142, so as to avoid interference between the first limiting baffle 132 and the second limiting baffle 142 and the second main body portion 123. As the anti-fooling insert block 103 is installed, the limiting protrusion 133 is located in the first anti-fooling concave hole 112, and thus the installation of the anti-fooling insert block 103 is completed.

[0078] After the installation is completed, due to the limitation of the limiting protrusion 133, the second main body portion 123, the first limiting baffle 132 and the second limiting baffle 142, the anti-fooling insert block 103 will not fall out of the first anti-fooling concave hole 112. This is because, since the limiting protrusion 133 is located in the first anti-fooling concave hole 112, when the anti-fooling insert block 103 is taken out along the installation direction, the limiting protrusion 133 interferes with the first limiting baffle 132. If it is necessary to remove the anti-fooling insert block 103, this interference needs to be eliminated. To eliminate the interference, the anti-fooling insert block 103 needs to be moved in the vertical direction. Due to the limitation of the second main body portion 123, the first limiting baffle 132 and the second limiting baffle 142, when the anti-fooling insert block 103 is moved in the vertical direction, the second main body portion 123 will interfere with the first limiting baffle 132 and the second limiting baffle 142. Therefore, the anti-fooling insert block 103 will not fall out of the first anti-fooling concave hole 112.

[0079] In some embodiments, in the direction from the first end plate 102 pointing to the battery cell assembly 100, the length of the first anti-fooling concave hole 112 is equal to the length of the second main body portion 123, so that when the anti-fooling insert block 103 is installed, the movement of the anti-fooling insert block 103 in the directions approaching and away from the battery cell assembly 100 can also be restricted.

[0080] With reference toFigure 2 and Figure 5 , in some embodiments, the material of the second end plate 104 is a polymer nano-plastic material, such as nano-olefin, nano-nylon, nano-polyester, nano-polyoxymethylene, etc. The polymer nano-plastic material has relatively high strength. After the second end plate 104 is formed, the second end plate 104 has relatively strong stress resistance, thereby providing a certain stress resistance while achieving insulation.

[0081] In some embodiments, the second end plate 104 may further include: a transverse reinforcing rib 105 and a longitudinal reinforcing rib 106, and the transverse reinforcing rib 105 is connected to the longitudinal reinforcing rib 106. The use of the transverse reinforcing rib 105 and the longitudinal reinforcing rib 106 can further improve the support strength of the second end plate 104. The second end plate 104 can be used to prevent the displacement of the battery cell assembly 100 during vibration, impact or long-term use, and can improve the stability of the battery module.

[0082] In some embodiments, in the extending direction of the longitudinal reinforcing rib 106, the arrangement density of the transverse reinforcing ribs 105 gradually increases from both sides to the middle. In other words, the density of the transverse reinforcing ribs 105 at the middle position of the second end plate 104 is greater. The transverse reinforcing ribs 105 with a greater density will further improve the stress resistance at the middle position of the second end plate 104. For the second end plate 104, the middle part of the second end plate 104 is often subjected to greater stress. Therefore, by increasing the arrangement density of the transverse reinforcing ribs 105 in the middle part, the reliability of the battery module can be further improved.

[0083] In some embodiments, the second end plate 104 further includes: a module lifting hole 107, and the module lifting hole 107 is cylindrical. The module lifting hole 107 is used to facilitate the installation of the battery module. By pre-reserving the module lifting hole 107, the installation of the battery module can be facilitated, thereby improving the convenience of installing the battery module.

[0084] In some embodiments, the arrangement density of the longitudinal reinforcing ribs 106 connected to the module lifting hole 107 is greater than the arrangement density of the longitudinal reinforcing ribs 106 on both sides of the module lifting hole 107. In other words, the arrangement density of the longitudinal reinforcing ribs 106 around the module lifting hole 107 is greater. When the module lifting hole 107 is used, the stress around the module lifting hole 107 is relatively strong. By setting a greater arrangement density of the longitudinal reinforcing ribs 106 around the module lifting hole 107, the stress resistance during the use of the module lifting hole 107 can also be improved, thereby avoiding the deformation of the module lifting hole 107 and further improving the reliability of the module lifting hole 107 and the second end plate 104.

[0085] In some embodiments, the second end plate 104 further includes: second mounting holes 124 arranged at intervals, and a part of the second aluminum bar 131 is embedded in the second mounting holes 124. For the second aluminum bar 131, protrusions corresponding to the second mounting holes 124 can be provided, and these protrusions are installed in the second mounting holes 124. Through the snap connection of the protrusions and recesses, the positioning and installation of the second aluminum bar 131 can be facilitated, thereby improving the convenience of assembling the battery module.

[0086] In some embodiments, the second end plate 104 may further include: fixing concave holes 119, and the fixing concave holes 119 are also located at the top of the second end plate 104.

[0087] In some embodiments, second anti-fooling concave holes 114 may be provided on the second end plate 104, and there are no notches on the second aluminum bar 131. Even if the second aluminum bar 131 and the first aluminum bar 121 are installed misaligned, since there are no notches on the second aluminum bar 131, the second aluminum bar 131 cannot be installed. When the first aluminum bar 121 and the second aluminum bar 131 are installed misaligned, the second aluminum bar 131 cannot be correspondingly snap-connected with the anti-fooling insert block 103, thereby avoiding the misalignment of the first aluminum bar 121 and the second aluminum bar 131, and improving the reliability of the battery module.

[0088] In some embodiments, the second end plate 104 further includes: module fixing holes 204, and the module fixing holes 204 are located on both sides of the second end plate 104 along the direction perpendicular to the arrangement direction of the battery cells. In other words, the module fixing holes 204 are located on both sides of the second end plate 104 along the vertical direction. Providing the 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 installing the second end plate 104.

[0089] In some embodiments, the second end plate 104 further includes: a strap upper limit rib 201 and a strap lower limit retaining table 202. The strap upper limit rib 201 and the strap lower limit retaining table 202 enclose an installation space, and the strap 200 is snap-connected in the installation space. The strap upper limit rib 201 is used to limit the upper limit of the movement of the strap 200, and the strap lower limit retaining table 202 is used to limit the lower limit of the movement of the strap 200, thereby facilitating the snap connection of the strap 200 to the second end plate 104 and improving the convenience of installing the battery module.

[0090] In some embodiments, the structures of the first end plate 102 and the second end plate 104 may be the same, which can facilitate the production of the first end plate 102 and the second end plate 104 and improve the versatility of the entire battery module.

[0091] The technical solutions provided by the embodiments of the present disclosure have 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 increasing the space utilization rate of the battery module while fulfilling the function of the end plate; on the other hand, a foolproof insert 103 is provided at a position corresponding to the first aluminum bar 121 and is matched with the first foolproof concave hole 112, which can prevent the misalignment of the first aluminum bar 121 and the second aluminum bar 131 during the installation process of the first aluminum bar 121 and the second aluminum bar 131, and can prevent mistakes, so as to improve the reliability of the installation of the battery module.

[0092] Another embodiment of the present disclosure further provides an energy storage device, which may include the battery module in some or all of the above embodiments. It should be noted that the same or corresponding parts as those in the above embodiments may refer to the above embodiments and will not be repeated hereinafter.

[0093] In some embodiments, the energy storage device may include: a housing, and an accommodation space is provided inside the housing.

[0094] The energy storage device may further include: a plurality of battery modules as described above, and the battery modules are located in the accommodation space.

[0095] Since the energy required by people has strong temporality and spatiality, in order to rationally utilize energy and improve the energy utilization rate, it is necessary to store one form of energy in the same or converted into another form of energy through a medium or device, and then release it in a specific energy form based on future application needs. As is well known, to achieve the major goal of carbon neutrality, the current main way to generate green electric energy is to develop green energy such as photovoltaic and wind power to replace fossil energy. Currently, the generation of green electric energy generally depends on photovoltaic, wind power, water potential, etc. However, wind energy and solar energy generally have problems such as strong intermittency and large volatility, which will cause the power grid to be unstable, there is not enough electricity during peak electricity consumption, and too much electricity during low electricity consumption. The unstable voltage will also damage the power. Therefore, the problem of "abandoning wind and light" may be caused due to insufficient electricity demand or insufficient grid acceptance capacity. To solve these problems, energy storage is required. That is, the electric energy is converted into other forms of energy and stored through physical or chemical means, and the energy is converted into electric energy and released when needed. Simply put, energy storage is similar to a large "portable charger", which stores electric energy when photovoltaic and wind energy are sufficient and releases the stored power when needed.

[0096] Taking electrochemical energy storage as an example, the present solution provides an energy storage device. A chemical battery is provided inside the energy storage device. It mainly uses the chemical elements in the chemical battery as the energy storage medium. The charge and discharge process is accompanied by chemical reactions or changes of the energy storage medium. Simply put, the electrical energy generated by wind energy and solar energy is stored in the chemical battery, and the stored electrical energy is released for use when the external electrical energy usage reaches a peak, or transferred to places with a shortage of electrical energy for reuse.

[0097] Another embodiment of the present disclosure further provides an electrical device. The electrical device 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 same or corresponding parts as those in the above embodiments may refer to the above embodiments, and will not be repeated hereinafter.

[0098] The electrical device may further include, but is not limited to, portable devices such as Bluetooth headsets, mobile phones, digital devices, and tablet computers, as well as large devices such as electric motorcycles, electric vehicles, and energy storage power stations. The embodiments of the present application do not make any limitations. The energy storage device provides electrical energy for the electrical device.

[0099] Those of ordinary skill in the art can understand that the above embodiments are specific embodiments for implementing the present disclosure. In actual applications, various changes can be made in form and details without departing from the spirit and scope of the embodiments of the present disclosure. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the embodiments of the present disclosure. Therefore, the protection scope of the embodiments of the present disclosure should be subject to the scope defined by the claims.

Claims

1. A battery module, characterized in that: include: A battery cell assembly, the battery cell assembly comprising N rows of battery cells; A CCS assembly, wherein the CCS assembly is fixed on 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 foolproof recessed hole, the first foolproof 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 is embedded in the first anti-foolproof recess and connected with the first aluminum bar; The second end plate is fixed on the other side of the battery cell assembly along the battery cell arrangement direction, and a second fool-proof recessed hole is provided on the second end plate, and the second fool-proof recessed hole is directly opposite to the second aluminum bar, and the material of the second end plate is insulating material.

2. The battery module according to claim 1, characterized in that: A notch is provided on the first aluminum bar, part of the fool-proofing insert protrudes from the first fool-proofing recessed hole, and the part protruding from the first fool-proofing recessed hole is engaged with the notch.

3. The battery module according to claim 1, characterized in that: The first end plate and / or the second end plate further include: transverse reinforcing ribs and longitudinal reinforcing ribs, and the transverse reinforcing ribs are connected to the longitudinal reinforcing ribs.

4. The battery module according to claim 3, 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.

5. The battery module according to claim 3, characterized in that: The first end plate and / or the second end plate further include: a module hoisting hole, and the module hoisting hole is cylindrical.

6. The battery module according to claim 5, 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.

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

8. 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 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.

9. The battery module according to claim 1, characterized in that: The anti-cracking block includes: a first main body portion and a second main body portion, the first main body portion and the second main body portion extend in different directions, and the extending direction of the first main body portion and the second main body portion is different from the direction in which the first end plate points to the battery cell assembly.

10. The battery module according to claim 9, characterized in that: The anti-fouling insert block further includes: a limiting protrusion, which 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.

11. The battery module according to claim 1, characterized in that: 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.

12. The battery module according to claim 11, characterized in that: 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.

13. The battery module according to claim 11, 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 clipped into the installation space.

14. 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 13, wherein the battery modules are located in the accommodating space.

15. An electrical equipment, characterized in that: Comprising the battery module according to any one of claims 1 to 13, or comprising the energy storage device according to claim 14.

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