Energy storage module

Abstract

The application provides an energy storage module, comprising a rotating shaft and an electric core assembly, wherein the rotating shaft is connected with the electric core assembly; the electric core assembly comprises a plurality of electric core units, and the plurality of electric core units are arranged in sequence along the circumferential direction of the rotating shaft; and the electric core assembly can rotate. The energy storage module provided by the application has good heat dissipation uniformity and high heat dissipation efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a power storage module. BACKGROUND

[0002] Lithium ion secondary batteries must work within a certain temperature range, otherwise the performance of the battery will be affected, the service life of the battery will be shortened, and the safety factor of the battery will be reduced, further causing problems such as gas production, smoking, and liquid leakage, and even the risk of battery combustion.

[0003] The existing battery module generally fixes the battery cell in the battery box, and then uses water cooling or air cooling to dissipate heat. However, since the position of the battery cell is fixed, when using water cooling or air cooling to dissipate heat, the heat dissipation surface of the battery cell is fixed (i.e. the surface of the battery cell in contact with the cooling liquid or cold air is fixed), which makes it easy for different parts of the battery module to have uneven heat dissipation, resulting in poor overall heat dissipation of the battery module and low heat dissipation efficiency.

[0004] Therefore, it is necessary to design a power storage battery module with good heat dissipation uniformity and high heat dissipation efficiency. SUMMARY

[0005] The present application provides a power storage module with good heat dissipation uniformity and high heat dissipation efficiency.

[0006] The present application provides a power storage module, comprising a rotating shaft and a battery cell assembly, wherein the rotating shaft is connected to the battery cell assembly; the battery cell assembly comprises a plurality of battery cell units, and the plurality of battery cell units are arranged in sequence along the circumferential direction of the rotating shaft; and the battery cell assembly is rotatable.

[0007] In an implementable manner, the battery cell assembly is rotatable about the axis of the rotating shaft.

[0008] In an implementable manner, the rotating shaft is rotatably connected to the battery cell assembly, the battery cell assembly is rotatable (e.g. under the blowing of external wind) about the rotating shaft; or the rotating shaft is fixedly connected to the battery cell assembly, the rotating shaft is used to be rotatably connected to an external device, the battery cell assembly is rotatable (e.g. under the blowing of external wind) relative to the external device; or the rotating shaft is fixedly connected to the battery cell assembly, the rotating shaft is used to be connected to an external driving device, and the battery cell assembly and the rotating shaft are rotatable under the driving of the external driving device.

[0009] In an implementation, the battery cell assembly further comprises a support wheel, the battery cell units are arranged on an outer surface of the support wheel, and a plurality of the battery cell units are arranged circumferentially around a periphery of the support wheel, the rotating shaft is connected with the support wheel and axial directions of the rotating shaft and the support wheel are parallel.

[0010] In an implementation, the rotating shaft is rotatably connected with the support wheel, and the support wheel is capable of rotating around the rotating shaft; or the rotating shaft is fixedly connected with the support wheel, and the rotating shaft is used to be rotatably connected with the external device or is used to be connected with an external driving device.

[0011] In an implementation, the support wheel is provided with a central hole penetrating through the support wheel along an axial direction of the support wheel, the rotating shaft is inserted into the central hole, and two ends of the rotating shaft respectively extend to opposite sides of the support wheel.

[0012] In an implementation, a plurality of the battery cell units are arranged radially along a circumferential direction of the rotating shaft.

[0013] In an implementation, the battery cell assembly further comprises a flying disc, the flying disc is arranged on at least one side of the support wheel along an axial direction of the support wheel, the flying disc is provided with a plurality of mounting slots on a surface close to the battery cell units, a plurality of the mounting slots respectively correspond to a plurality of the battery cell units, and an end of each of the battery cell units is inserted and fixed in a corresponding mounting slot.

[0014] In an implementation, a central position of the flying disc is provided with a clamping hole, the support wheel is inserted into the clamping hole, so that the flying disc is sleeved on the support wheel.

[0015] In an implementation, the flying disc is arranged on opposite sides of the support wheel along an axial direction of the support wheel, and opposite ends of each of the battery cell units are respectively inserted and fixed in the mounting slots of the flying discs on the opposite sides.

[0016] In an implementation, the battery cell assembly further comprises a pole row, the pole row is arranged on at least one side of the support wheel along an axial direction of the support wheel, each of the battery cell units comprises at least one battery cell, and a tab of the battery cell corresponds to the pole row, and the pole row is electrically connected with the tabs of the battery cells in a plurality of the battery cell units.

[0017] In an implementation, the pole row is arranged on opposite sides of the support wheel along an axial direction of the support wheel, two tabs of the battery cell are respectively arranged on opposite ends of the battery cell, and the two tabs of the battery cell are respectively electrically connected with the pole rows on the opposite sides.

[0018] In an implementation, the pole row is located on a side of the flying disc away from the battery cell unit, the flying disc is provided with a receiving groove on a surface of the side away from the battery cell unit, and the pole row is arranged in the receiving groove; the flying disc is provided with a through hole at a position corresponding to the pole lug, and the pole lug of the battery cell is electrically connected with the pole row after passing through the through hole.

[0019] In an implementation, the pole row comprises a plurality of current collecting tabs, the plurality of current collecting tabs are arranged in a circumferential direction of the rotating shaft to form a ring structure, the plurality of current collecting tabs correspond to the plurality of battery cell units respectively, and each current collecting tab is electrically connected with the pole lug of the battery cell in a corresponding battery cell unit.

[0020] In an implementation, the current collecting tab comprises an electrical connection part and a clamping part connected with an end of the electrical connection part, the electrical connection part is electrically connected with the pole lug of the battery cell, and the clamping parts of two adjacent current collecting tabs are connected.

[0021] In an implementation, the clamping part comprises a first recess and a second recess, the first recess and the second recess are located at opposite ends of the clamping part respectively; the clamping part has opposite first and second surfaces, the first recess is recessed from the first surface toward a side close to the second surface, and the second recess is recessed from the second surface toward a side close to the first surface; the first recess of one of the two adjacent current collecting tabs is overlapped with the second recess of the other current collecting tab.

[0022] In an implementation, the clamping part further comprises a main body part, the first recess and the second recess are arranged at opposite ends of the main body part respectively; the sum of the thicknesses of the first recess and the second recess is equal to the thickness of the main body part, so that the surfaces of the clamping parts of the two adjacent current collecting tabs are flush after the clamping parts of the two adjacent current collecting tabs are overlapped.

[0023] In an implementation, the battery cell assembly further comprises a current collecting disc, the current collecting disc is arranged on a side of the pole row away from the battery cell unit, and the current collecting disc is electrically connected with the pole row.

[0024] In an implementation, the current collecting disc comprises an outer ring and an inner ring arranged concentrically, the diameter of the outer ring is greater than the diameter of the inner ring, the outer ring is arranged around the inner ring, the outer ring and the inner ring are connected through a current collecting strip, the outer ring is in contact with the pole row, and the inner ring is sleeved on the rotating shaft.

[0025] In an implementation, the end surface of the supporting wheel is provided with a clamping groove, and the current collecting strip is clamped in the clamping groove.

[0026] In an implementable manner, the outer surface of the supporting wheel is provided with a clamping groove, and the side of the battery cell unit is inserted into the clamping groove.

[0027] In an implementable manner, the battery cell unit comprises a heat-dissipating supporting shell and at least one battery cell arranged in the heat-dissipating supporting shell, the side of the heat-dissipating supporting shell is inserted into the clamping groove, and the tab of the battery cell extends out of the heat-dissipating supporting shell.

[0028] In an implementable manner, the supporting wheel is made of an insulating and heat-insulating material.

[0029] In an implementable manner, the battery cell unit is in a square structure, the length direction of the battery cell unit is parallel to the axial direction of the supporting wheel, the width direction of the battery cell unit forms an angle of 45°-90° with the first tangent plane of the supporting wheel, and the first tangent plane is the tangent plane at the position where the battery cell unit contacts the supporting wheel.

[0030] In an implementable manner, a plurality of battery cell units are arranged in a radial manner along the circumferential direction of the supporting wheel, one end of the battery cell unit away from the supporting wheel is a first end, and there is a gap between the first ends of adjacent battery cell units, so that a ventilation groove is formed between the adjacent battery cell units.

[0031] In an implementable manner, the energy storage module further comprises a cover plate, the cover plate is arranged on the opposite sides of the battery cell assembly, and the cover plate is fixed with the battery cell assembly.

[0032] The energy storage module provided by the application has the advantages that the rotating shaft is arranged to be connected with the battery cell assembly, a plurality of battery cell units in the battery cell assembly are arranged in sequence along the circumferential direction of the rotating shaft, and the battery cell assembly can rotate, so that the battery cell assembly can continuously change the heat-dissipating part (i.e. the part of the battery cell assembly contacting the air) when the battery cell assembly rotates, thereby improving the consistency, uniformity and efficiency of heat dissipation of the energy storage module, and the battery cell assembly can further dissipate heat by air convection during the rotation process, thereby further improving the heat dissipation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 FIG. 1 is a schematic diagram of the three-dimensional structure of the energy storage module in the embodiment of the application.

[0034] Figure 2 FIG. 4 is a schematic diagram of the exploded structure of the energy storage module. Figure 1 FIG. 5 is a schematic diagram of the structure after removing the cover plate.

[0035] Figure 3 FIG. 8 is a schematic diagram of the exploded structure of the energy storage module. Figure 2 FIG. 9 is a schematic diagram of the exploded structure of the energy storage module.

[0036] Figure 4 For Figure 3 The exploded view of the structure after further decomposition.

[0037] Figure 5 For the structure diagram of the partial cell assembly installed on the rotating shaft in the embodiment of the application.

[0038] Figure 6 For the structure diagram of the flying disc in the embodiment of the application.

[0039] Figure 7 For the structure diagram of the pole row in the embodiment of the application.

[0040] Figure 8 For Figure 7 The connection structure diagram of the adjacent two current collecting sheets.

[0041] Figure 9 For Figure 8 The structure diagram of the single current collecting sheet.

[0042] Figure 10 For the structure diagram of the current collecting disc in the embodiment of the application.

[0043] Figure 11 For the assembly structure diagram of the cell unit, the supporting wheel and the flying disc in the embodiment of the application.

[0044] Figure 12 For the structure diagram of the flying disc in another direction in the embodiment of the application.

[0045] Figure 13 For the structure diagram of the cell unit in the embodiment of the application.

[0046] Figure 14 For Figure 13 The exploded structure diagram.

[0047] Figure 15 For the assembly structure diagram of the cell unit and the supporting wheel in another embodiment of the application.

[0048] Figure 16 For the structure diagram of the single current collecting sheet in another embodiment of the application.

[0049] Among them, 1-cell assembly, 2-shaft, 21-second weight reduction hole, 3-cover plate, 11-cell unit, 111-cell, 111a-tab, 112-heat dissipation support housing, 113-ventilation slot, 12-support wheel, 121-center hole, 122-slot, 123-slot groove, 124-first weight reduction hole, 13-flying disc, 131-mounting slot, 132-slot hole, 133-accommodating slot, 134-through hole, 135-plug slot, 14-pole row, 140-current collector plate, 141-electrical connection part, 142-locking part, 1421-main body part, 1422-first recessed part, 1423-second recessed part, 15-current collector plate, 151-outer ring, 152-inner ring, 153-current collector strip. Detailed Implementation

[0050] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0051] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and claims of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0052] The directional terms such as "up," "down," "left," "right," "front," "back," "top," and "bottom" (if present) used in the specification and claims of this invention are defined by the position of the structures in the drawings and the relative positions of the structures, and are only for the clarity and convenience of expressing the technical solution. It should be understood that the use of directional terms should not limit the scope of protection claimed by this invention.

[0053] like Figures 1 to 4 As shown, the energy storage module provided in this embodiment of the invention includes a rotating shaft 2 and a battery cell assembly 1. The rotating shaft 2 is connected to the battery cell assembly 1 and is used to connect to an external device (not shown) or an external drive device (not shown). The battery cell assembly 1 includes a plurality of battery cell units 11, which are arranged sequentially along the circumferential direction of the rotating shaft 2. The battery cell assembly 1 is rotatable.

[0054] Specifically, the energy storage module provided in this embodiment is connected to the battery cell assembly 1 by setting a rotating shaft 2. Multiple battery cell units 11 in the battery cell assembly 1 are arranged sequentially along the circumferential direction of the rotating shaft 2, and the battery cell assembly 1 can rotate around the axis of the rotating shaft 2. When the battery cell assembly 1 rotates around the axis of the rotating shaft 2, the battery cell assembly 1 can continuously change its heat dissipation part (i.e. the part of the battery cell assembly 1 that is in contact with the air), thereby improving the heat dissipation consistency, heat dissipation uniformity and heat dissipation efficiency of the energy storage module; moreover, the battery cell assembly 1 can further dissipate heat through air convection during rotation, thereby further improving the heat dissipation efficiency.

[0055] As shown in Figures 1 to 4 As an embodiment, the rotating shaft 2 is fixedly connected with the battery cell assembly 1, the rotating shaft 2 is used to be rotatably connected with an external device, and the battery cell assembly 1 can rotate relative to the external device under the blowing of external wind. At this time, a bearing (not shown in the figure) can be arranged between the rotating shaft 2 and the external device, so that the rotating shaft 2 and the battery cell assembly 1 can rotate more smoothly.

[0056] Specifically, the external device can be an electrically powered vehicle, an electrically powered machine, or other electrically powered equipment, and can also be a wind power / photovoltaic energy storage system or other energy storage equipment. Of course, the external device can also be other devices. The external wind can come from natural wind or wind blown by a wind cooling device. When the external wind blows the plurality of battery cell units 11 in the battery cell assembly 1, the battery cell assembly 1 and the rotating shaft 2 can rotate together relative to the external device.

[0057] As another embodiment, the rotating shaft 2 is rotatably connected with the battery cell assembly 1, the rotating shaft 2 is used to be connected with an external device (the rotating shaft 2 can be fixedly connected or rotatably connected with the external device), and the battery cell assembly 1 can rotate around the rotating shaft 2 under the blowing of external wind. At this time, a bearing (not shown in the figure) can be arranged between the rotating shaft 2 and the battery cell assembly 1, so that the battery cell assembly 1 can rotate more smoothly around the rotating shaft 2. When the external wind blows the plurality of battery cell units 11 in the battery cell assembly 1, the battery cell assembly 1 can rotate relative to the external device, and the rotating shaft 2 can rotate or not rotate.

[0058] The above two cases are because the rotating power of the battery cell assembly 1 comes from external wind, so it is not necessary to use a driving device to drive the battery cell assembly 1 to rotate, thereby saving energy consumption and equipment cost. At the same time, in order to make the battery cell assembly 1 rotate better, as shown in Figures 1 to 4 The plurality of battery cell units 11 in the battery cell assembly 1 can be arranged in a radial structure, that is, the plurality of battery cell units 11 in the battery cell assembly 1 are arranged to form a structure similar to the impeller structure of a centrifugal fan, thereby increasing the wind receiving area of the battery cell assembly 1, so that the battery cell assembly 1 can be blown by wind better and has a larger heat dissipation area.

[0059] As another embodiment, the rotating shaft 2 is fixedly connected with the battery cell assembly 1, the rotating shaft 2 is used to be connected with an external driving device (not shown in the figure, for example, the external driving device can be a motor or the like), and the battery cell assembly 1 and the rotating shaft 2 can rotate under the driving of the external driving device.

[0060] As shown in Figures 2 to 4 As an embodiment, the battery cell assembly 1 further comprises a support wheel 12, the battery cell unit 11 is arranged on the outer surface of the support wheel 12, the plurality of battery cell units 11 are arranged circumferentially around the periphery of the support wheel 12, and the rotating shaft 2 is connected with the support wheel 12 and the axial directions of the two are parallel.

[0061] AsFigures 2 to 4 As shown, in one embodiment, the rotating shaft 2 is connected to the center position of the support wheel 12.

[0062] like Figures 2 to 4 As shown, in one embodiment, the support wheel 12 has a cylindrical structure and a central hole 121. The central hole 121 extends through the support wheel 12 along its axial direction. The rotating shaft 2 is inserted into the central hole 121, and both ends of the rotating shaft 2 extend to opposite sides of the support wheel 12. Of course, in other embodiments, the rotating shaft 2 and the support wheel 12 can have other connection methods. For example, the rotating shaft 2 can be located on opposite sides of the support wheel 12 (the rotating shaft 2 does not extend through the support wheel 12), and the rotating shaft 2 is connected to the opposite ends of the support wheel 12; or, the rotating shaft 2 and the support wheel 12 are an integral structure.

[0063] like Figures 2 to 4 As shown, in one embodiment, the rotating shaft 2 is fixedly connected to the support wheel 12. The rotating shaft 2 is used for rotatable connection with an external device, and the support wheel 12 can rotate together with the rotating shaft 2, thereby enabling the battery cell assembly 1 and the rotating shaft 2 to rotate together relative to the external device. In this embodiment, the rotating shaft 2 and the support wheel 12 are fixedly connected by an interference fit; of course, in other embodiments, the rotating shaft 2 and the support wheel 12 can also be fixedly connected by other means (e.g., snap-fit, screw-fit, adhesive-fit, etc.).

[0064] In another embodiment, the rotating shaft 2 is rotatably connected to the support wheel 12, which can rotate around the rotating shaft 2, thereby enabling the battery cell assembly 1 to rotate around the rotating shaft 2. In this case, a bearing can be provided between the rotating shaft 2 and the support wheel 12 to allow the battery cell assembly 1 to rotate around the rotating shaft 2 more smoothly.

[0065] In another embodiment, the rotating shaft 2 is fixedly connected to the support wheel 12. The rotating shaft 2 is used to connect to an external drive device. At this time, the battery cell assembly 1 and the rotating shaft 2 can rotate under the drive of the external drive device.

[0066] like Figures 3 to 5 and Figure 11 As shown, in one embodiment, the battery cell assembly 1 further includes a fly disk 13. The fly disk 13 is disposed on at least one side of the support wheel 12 along its axial direction (i.e., along the axial direction of the support wheel 12). The fly disk 13 has a plurality of mounting slots 131 on its surface near the battery cell unit 11. The plurality of mounting slots 131 correspond to a plurality of battery cell units 11, and the end of each battery cell unit 11 is inserted and fixed in a corresponding mounting slot 131. The fly disk 13 is used to stabilize the battery cell unit 11, thereby ensuring the stability of the battery cell unit 11 during rotation.

[0067] like Figures 3 to 5 and Figure 11As shown, as an embodiment, the fly disc 13 is arranged on opposite sides of the support wheel 12 along the axial direction thereof (i.e. along the axial direction of the support wheel 12), and the opposite ends of each of the battery cell units 11 are respectively inserted and fixed in the mounting slots 131 of the fly discs 13 on the opposite sides, so as to further improve the stability of the battery cell units 11.

[0068] As shown in FIG. 1, as an embodiment, the battery cell assembly 1 comprises a plurality of battery cell units 11, each of which comprises at least one battery cell 111. Figures 4 to 6 As shown, as an embodiment, the middle part of the fly disc 13 is provided with a clamping hole 132, and the end of the support wheel 12 is inserted into the clamping hole 132, so that the fly disc 13 is sleeved on the support wheel 12, and the fly disc 13 and the support wheel 12 are fixedly connected in a clearance fit manner. Of course, in other embodiments, the fly disc 13 and the support wheel 12 can also be fixedly connected in other ways (such as clamping, screwing, gluing, etc.).

[0069] As shown in FIG. 1, as an embodiment, the battery cell assembly 1 comprises a plurality of battery cell units 11, each of which comprises at least one battery cell 111. Figures 2 to 5 As shown in FIG. 1, as an embodiment, the battery cell assembly 1 further comprises a pole row 14, the pole row 14 is arranged on at least one side of the support wheel 12 along the axial direction thereof, each of the battery cell units 11 comprises at least one battery cell 111, the pole ear 111a of the battery cell 111 is arranged corresponding to the pole row 14, and the pole row 14 is electrically connected with the pole ears 111a of the battery cells 111 in the plurality of battery cell units 11, and the pole row 14 is used for leading out the pole ears 111a of the battery cells 111. Figure 13 As shown in FIG. 1, as an embodiment, the pole row 14 is arranged on opposite sides of the support wheel 12 along the axial direction thereof, the two pole ears 111a of the battery cell 111 are arranged on opposite ends of the battery cell 111 (i.e. the battery cell 111 adopts a mode of leading out the pole ears 111a from the same side), and the two pole ears 111a of the battery cell 111 are electrically connected with the pole rows 14 on the opposite sides, so as to lead out the positive and negative pole ears of the battery cell 111. Of course, in other embodiments, the battery cell 111 can also adopt a mode of leading out the pole ears 111a from one side, that is, the two pole ears 111a of the battery cell 111 are arranged on the same side of the battery cell 111, and at this time, only the pole row 14 needs to be arranged on one side of the support wheel 12.

[0070] As shown in FIG. 1, as an embodiment, the pole row 14 is located on the side of the fly disc 13 away from the battery cell unit 11, the fly disc 13 is provided with a containing slot 133 on the surface of the side away from the battery cell unit 11, and the pole row 14 is arranged in the containing slot 133 (i.e. the pole row 14 is embedded in the containing slot 133). The fly disc 13 is provided with a through hole 134 at a position corresponding to the pole ear 111a, the position of the through hole 134 corresponds to the position of the mounting slot 131, and the pole ear 111a of the battery cell 111 is electrically connected with the pole row 14 after passing through the through hole 134. Figures 2 to 4 Figure 13 As shown in FIG. 1, as an embodiment, the pole row 14 is located on the side of the fly disc 13 away from the battery cell unit 11, the fly disc 13 is provided with a containing slot 133 on the surface of the side away from the battery cell unit 11, and the pole row 14 is arranged in the containing slot 133 (i.e. the pole row 14 is embedded in the containing slot 133). The fly disc 13 is provided with a through hole 134 at a position corresponding to the pole ear 111a, the position of the through hole 134 corresponds to the position of the mounting slot 131, and the pole ear 111a of the battery cell 111 is electrically connected with the pole row 14 after passing through the through hole 134.

[0071] As shown in FIG. 1, as an embodiment, the pole row 14 is located on the side of the fly disc 13 away from the battery cell unit 11, the fly disc 13 is provided with a containing slot 133 on the surface of the side away from the battery cell unit 11, and the pole row 14 is arranged in the containing slot 133 (i.e. the pole row 14 is embedded in the containing slot 133). The fly disc 13 is provided with a through hole 134 at a position corresponding to the pole ear 111a, the position of the through hole 134 corresponds to the position of the mounting slot 131, and the pole ear 111a of the battery cell 111 is electrically connected with the pole row 14 after passing through the through hole 134. Figures 3 to 7 Figure 12 As shown in FIG. 1, as an embodiment, the pole row 14 is located on the side of the fly disc 13 away from the battery cell unit 11, the fly disc 13 is provided with a containing slot 133 on the surface of the side away from the battery cell unit 11, and the pole row 14 is arranged in the containing slot 133 (i.e. the pole row 14 is embedded in the containing slot 133). The fly disc 13 is provided with a through hole 134 at a position corresponding to the pole ear 111a, the position of the through hole 134 corresponds to the position of the mounting slot 131, and the pole ear 111a of the battery cell 111 is electrically connected with the pole row 14 after passing through the through hole 134. ​​

[0072] As shown in Figures 4 to 7 , as an embodiment, the pole row 14 includes a plurality of current collecting sheets 140 arranged in a circumferential direction of the rotation shaft 2 to form a ring structure (a radial structure), and the plurality of current collecting sheets 140 correspond to the plurality of battery cell units 11 respectively, and each current collecting sheet 140 is electrically connected to the tab 111a of the battery cell 111 in a corresponding battery cell unit 11.

[0073] Specifically, each current collecting sheet 140 is embedded in the accommodating groove 133 on the flying disc 13, and after the tab 111a of the battery cell 111 passes through the through hole 134, the tab 111a is bent to be attached to the current collecting sheet 140, and then the current collecting sheet 140 and the tab 111a are welded and fixed to lead out the tab 111a of each battery cell 111.

[0074] As shown in Figure 3 , Figure 8 and Figure 9 , as an embodiment, the current collecting sheet 140 includes an electrical connection part 141 and a clamping part 142 connected to an end of the electrical connection part 141, the clamping part 142 is arranged perpendicular to the electrical connection part 141, the electrical connection part 141 is electrically connected to the tab 111a of the battery cell 111, and the clamping parts 142 of two adjacent current collecting sheets 140 are connected.

[0075] As shown in Figure 8 and Figure 9 , as an embodiment, the clamping part 142 includes a first recessed part 1422 and a second recessed part 1423, and the first recessed part 1422 and the second recessed part 1423 are located at opposite ends of the clamping part 142 respectively. The clamping part 142 has opposite first and second surfaces, the first recessed part 1422 is recessed from the first surface towards the side close to the second surface, and the second recessed part 1423 is recessed from the second surface towards the side close to the first surface (i.e. the first recessed part 1422 and the second recessed part 1423 are recessed from the two opposite surfaces of the clamping part 142 respectively); in two adjacent current collecting sheets 140, the first recessed part 1422 of one current collecting sheet 140 and the second recessed part 1423 of the other current collecting sheet 140 are overlapped together, thereby realizing the electrical connection between the two adjacent current collecting sheets 140.

[0076] As shown in Figure 8 and Figure 9As shown, as an embodiment, the engaging portion 142 further comprises a main body portion 1421 which is not provided with a recess, and a first recessed portion 1422 and a second recessed portion 1423 are respectively arranged at opposite ends of the main body portion 1421; the sum of the thicknesses of the first recessed portion 1422 and the second recessed portion 1423 is equal to the thickness of the main body portion 1421, so that after the engaging portions 142 of the two adjacent current collecting tabs 140 are overlapped together, the surfaces of the engaging portions 142 of the two adjacent current collecting tabs 140 are flush, thereby making the surface of the pole row 14 as a whole be in a planar shape when the current collecting disc 15 (the specific structure of the current collecting disc 15 will be described below) contacts the pole row 14, so that the current collecting disc 15 can be attached to the surface of the pole row 14, thereby increasing the contact area between the two, thereby increasing the current leading-out efficiency and improving the stability of the overall structure of the module.

[0077] As shown in Figure 9 , as an embodiment, the current collecting tab 140 is in an L-shaped structure, and the first recessed portion 1422 of the engaging portion 142 is connected to the end of the electrical connection portion 141. As shown in Figure 16 , as another embodiment, the current collecting tab 140 is in an inverted T-shaped structure, and the main body portion 1421 of the engaging portion 142 is connected to the end of the electrical connection portion 141. Of course, in other embodiments, the current collecting tab 140 can also be in other shapes.

[0078] As shown in Figure 4 , Figure 5 and Figure 10 , as an embodiment, the battery cell assembly 1 further comprises a current collecting disc 15, which is arranged at the side of the pole row 14 away from the battery cell unit 11 and is electrically connected to the pole row 14.

[0079] As shown in Figure 4 , Figure 5 and Figure 10 , as an embodiment, the current collecting disc 15 comprises an outer ring 151 and an inner ring 152 which are concentrically arranged, the diameter of the outer ring 151 is larger than that of the inner ring 152, the outer ring 151 is arranged around the inner ring 152, and the outer ring 151 and the inner ring 152 are connected through a current collecting strip 153. The diameter of the outer ring 151 is slightly larger than the diameter of the support wheel 12, and the outer ring 151 is in contact with the pole row 14 (i.e., the outer ring 151 abuts against the pole row 14); the diameter of the inner ring 152 is slightly larger than the diameter of the rotating shaft 2, and the inner ring 152 is sleeved on the rotating shaft 2.

[0080] As shown in Figure 5 and Figure 10 , as an embodiment, the outer ring 151 of the current collecting disc 15 abuts against the engaging portion 142 of each current collecting tab 140 in the pole row 14.

[0081] As shown in Figure 4 , Figure 5 andFigure 11 As shown in the drawings, as an embodiment, the end surface of the support wheel 12 is provided with a clamping groove 122, and the current collector plate 153 is clamped in the clamping groove 122, so that the current collector plate 15 is fixedly connected with the support wheel 12.

[0082] As shown in the drawings, as an embodiment, the outer surface of the support wheel 12 is provided with a clamping groove 123, and the side of the battery cell unit 11 is inserted into the clamping groove 123, so that the battery cell unit 11 is fixed on the support wheel 12, further improving the stability of the battery cell unit 11. Figure 4 Figure 11 As shown in the drawings, as an embodiment, the outer surface of the support wheel 12 is provided with a clamping groove 123, and the side of the battery cell unit 11 is inserted into the clamping groove 123, so that the battery cell unit 11 is fixed on the support wheel 12, further improving the stability of the battery cell unit 11.

[0083] As shown in the drawings, as an embodiment, the outer surface of the support wheel 12 is provided with a clamping groove 123, and the side of the battery cell unit 11 is inserted into the clamping groove 123, so that the battery cell unit 11 is fixed on the support wheel 12, further improving the stability of the battery cell unit 11. Figure 11 Figure 13 As shown in the drawings, as an embodiment, the outer surface of the support wheel 12 is provided with a clamping groove 123, and the side of the battery cell unit 11 is inserted into the clamping groove 123, so that the battery cell unit 11 is fixed on the support wheel 12, further improving the stability of the battery cell unit 11. Figure 14 As shown in the drawings, as an embodiment, the battery cell unit 11 includes a heat dissipation support shell 112 and at least one battery cell 111 arranged in the heat dissipation support shell 112, the side of the heat dissipation support shell 112 is inserted into the clamping groove 123, and the tab 111a of the battery cell 111 extends out of the heat dissipation support shell 112. The heat dissipation support shell 112 is used to reinforce, stabilize and dissipate heat of the battery cell 111.

[0084] Specifically, in the present embodiment, the heat dissipation support shell 112 is a U-shaped structure with three open sides (i.e., the heat dissipation support shell 112 is a three-sided structure), two of which are arranged on opposite sides of the heat dissipation support shell 112 along the axial direction of the support wheel 12, and the other is arranged on the side of the heat dissipation support shell 112 close to the surface of the support wheel 12; the tabs 111a at both ends of the battery cell 111 extend out of the heat dissipation support shell 112 through the openings on the opposite sides of the heat dissipation support shell 112, and the two ends of the battery cell 111 opposite the tabs 111a are inserted and fixed in the mounting grooves 131 of the flying discs 13 on the opposite sides; the side of the heat dissipation support shell 112 close to the support wheel 12 is inserted into the clamping groove 123 on the support wheel 12. At the same time, as shown in the drawings, the flying disc 13 is also provided with an insertion groove 135 on the surface close to the battery cell unit 11, and the end of the heat dissipation support shell 112 is inserted into the insertion groove 135. Figure 11

[0085] Of course, in addition to being fixed by clamping the mounting grooves 131 and the insertion grooves 135 on the flying disc 13 and the clamping groove 123 on the support wheel 12, when the mass of the battery cell unit 11 is large, the battery cell unit 11 can also be fixed by bonding with the flying disc 13 and / or the support wheel 12; or a fixing bracket (not shown in the drawings) can be designed on the surface of the support wheel 12 to fix the battery cell unit 11; or a protective ring (not shown in the drawings) can be sleeved on the outside of the battery cell unit 11 for fixation.

[0086] As shown in the drawings, as an embodiment, the outer surface of the support wheel 12 is provided with a clamping groove 123, and the side of the battery cell unit 11 is inserted into the clamping groove 123, so that the battery cell unit 11 is fixed on the support wheel 12, further improving the stability of the battery cell unit 11. Figure 13 and​​​Figure 14 As shown, as an embodiment, one battery cell 111 is arranged in each heat dissipation support shell 112.

[0087] As another embodiment, a plurality of battery cells 111 are arranged in each heat dissipation support shell 112, and the adjacent battery cells 111 are fixed by bonding.

[0088] As an embodiment, the battery cell 111 and the heat dissipation support shell 112 are fixed by bonding.

[0089] As an embodiment, the support wheel 12 is made of insulating and heat insulating material, so as to prevent the heat transfer of the single-piece battery cell 111 after thermal runaway, and slow down the further expansion of thermal runaway.

[0090] As shown in Figure 11 and Figure 13 As an embodiment, the battery cell unit 11 is in square structure, the battery cell unit 11 has a length direction L and a width direction W, the length direction L of the battery cell unit 11 is parallel to the axial direction of the support wheel 12, and the battery cell unit 11 is arranged perpendicular to the tangent plane of the support wheel 12, that is, the angle between the width direction W of the battery cell unit 11 and the first tangent plane of the support wheel 12 is 90°, and the first tangent plane is the tangent plane at the contact position between the battery cell unit 11 and the support wheel 12 (in other words, the width direction W of the battery cell unit 11 is parallel to the first radial direction of the support wheel 12, and the first radial direction is the radial direction at the contact position between the battery cell unit 11 and the support wheel 12).

[0091] As shown in Figure 15 and in combination with Figure 13 As an embodiment, the tangent plane between the battery cell unit 11 and the support wheel 12 is arranged at a certain angle, and the angle a between the width direction W of the battery cell unit 11 and the first tangent plane of the support wheel 12 is greater than or equal to 45° and less than 90°, and the first tangent plane is the tangent plane at the contact position between the battery cell unit 11 and the support wheel 12.

[0092] As shown in Figures 1 to 3As shown, as an embodiment, the plurality of battery cell units 11 in the battery cell assembly 1 are arranged radially along the circumferential direction of the support wheel 12, the first end of the battery cell unit 11 is away from the support wheel 12, the second end of the battery cell unit 11 is close to the support wheel 12, there is a gap between the first ends of adjacent battery cell units 11, thereby forming a ventilation groove 113 between adjacent battery cell units 11; the second ends of adjacent battery cell units 11 can be abutted (i.e. the two adjacent battery cell units 11 are placed to form a V-shaped structure), or can be arranged with a gap. The external wind forms a turbulent flow after blowing into the ventilation groove 113, thereby quickly taking away the heat on the surface of the battery cell unit 11, improving the heat dissipation efficiency; at the same time, since there is a gap between adjacent battery cell units 11, each battery cell unit 11 is an individual, and does not interfere with each other, when the heat of a certain battery cell unit 11 is too high, it will not affect the performance of other battery cell units 11, improving the safety of the module. The shape of the ventilation groove 113 can be trapezoidal, triangular, etc., which is related to the placement angle and position between adjacent battery cell units 11.

[0093] As shown in Figure 4 and Figure 11 As an embodiment, the first weight reduction hole 124 is provided on the support wheel 12, and the first weight reduction hole 124 penetrates the support wheel 12 along the axial direction of the support wheel 12. The second weight reduction hole 21 is provided on the rotating shaft 2, and the second weight reduction hole 21 penetrates the rotating shaft 2 along the axial direction of the rotating shaft 2. By providing the first weight reduction hole 124 on the support wheel 12 and the second weight reduction hole 21 on the rotating shaft 2, the weight of the energy storage module is reduced, and the energy density is improved.

[0094] As shown in Figure 1 As an embodiment, the energy storage module further comprises a cover plate 3, the cover plate 3 is arranged on the opposite sides of the battery cell assembly 1, and the cover plate 3 is fixed with the battery cell assembly 1, and the cover plate 3 is sleeved on the rotating shaft 2.

[0095] As shown in Figure 14 As an embodiment, the battery cell 111 is a soft package battery cell. Of course, in other embodiments, the battery cell 111 can also be a square battery cell or a cylindrical battery cell, and the structure of the mounting groove 131 on the flying disc 13 is adjusted accordingly according to the different battery cell 111 to ensure the stability of the battery cell assembly 1 during rotation; at the same time, when the battery cell 111 is a square battery cell or a cylindrical battery cell, its weight is larger than that of the soft package battery cell, and it needs to be fixed by sleeving a ring-shaped protective ring on the outside of the battery cell assembly 1.

[0096] As an embodiment, the assembly method of the energy storage module can be:

[0097] 1. Insert the rotating shaft 2 into the center hole 121 of the support wheel 12 and pass through the support wheel 12;

[0098] 2. A flying disc 13 is fixed on one end of the support wheel 12;

[0099] 3. A plurality of electric core units 11 are radially arranged around the support wheel 12, and one end of the electric core unit 11 is inserted and fixed in the mounting slot 131 on the flying disc 13;

[0100] 4. Another flying disc 13 is sleeved on the other end of the support wheel 12, and the other end of the electric core unit 11 is inserted and fixed in the mounting slot 131 on the other flying disc 13;

[0101] 5. The pole row 14 is embedded in the containing slot 133 on the flying disc 13, and the pole lug 111a of the electric core 111 is bent and welded with the pole row 14;

[0102] 6. The current collecting disc 15 is arranged on both sides of the support wheel 12, the current collecting disc 15 abuts against the pole row 14, and the current collecting strip 153 on the current collecting disc 15 is clamped in the clamping slot 122 on the end face of the support wheel 12;

[0103] 7. The cover plate 3 is sleeved on both ends of the rotating shaft 2, and the cover plate 3 is fixed with the electric core assembly 1, that is, the assembly of the energy storage module is completed.

[0104] The energy storage module provided by the embodiment of the application has the following advantages:

[0105] 1. The plurality of electric core units 11 in the electric core assembly 1 are arranged in a radial structure, so that the plurality of electric core units 11 are arranged to form a structure similar to the impeller of a centrifugal fan. When the rotating shaft 2 of the energy storage module is installed on an external device, external wind can blow the plurality of electric core units 11 to provide rotating power for the electric core assembly 1, so that the electric core assembly 1 rotates relative to the external device, thereby enabling the electric core assembly 1 to continuously change the heat dissipation position, and further improving the heat dissipation consistency, heat dissipation uniformity and heat dissipation efficiency of the energy storage module. Moreover, the electric core assembly 1 can further convect heat with air during rotation, thereby further improving the heat dissipation efficiency.

[0106] 2. The gap is arranged between the adjacent electric core units 11, so that the ventilation groove 113 is formed between the adjacent electric core units 11. External wind forms a turbulent flow after being blown into the ventilation groove 113, thereby quickly taking away the heat on the surface of the electric core unit 11 and improving the heat dissipation efficiency. Moreover, since the gap exists between the adjacent electric core units 11, each electric core unit 11 is an independent individual and does not interfere with each other. When the heat of a certain electric core unit 11 is too high, the performance of other electric core units 11 will not be affected, thereby improving the safety of the module.

[0107] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An energy storage module, characterized by, The application relates to a rotating shaft (2) and an electric core assembly (1), wherein the rotating shaft (2) is connected with the electric core assembly (1); the electric core assembly (1) comprises a plurality of electric core units (11) arranged along the circumferential direction of the rotating shaft (2) in sequence; the electric core assembly (1) can rotate; the electric core assembly (1) further comprises a supporting wheel (12), the electric core units (11) are arranged on the outer surface of the supporting wheel (12), the plurality of electric core units (11) are arranged circumferentially around the periphery of the supporting wheel (12), and the rotating shaft (2) is connected with the supporting wheel (12) and the axial directions of the two are parallel. The rotating shaft (2) is rotatably connected with the electric core assembly (1), the electric core assembly (1) can rotate around the rotating shaft (2); or the rotating shaft (2) is fixedly connected with the electric core assembly (1), the rotating shaft (2) is used for being rotatably connected with an external device, or the electric core assembly (1) can rotate relative to the external device; or the rotating shaft (2) is fixedly connected with the electric core assembly (1), the rotating shaft (2) is used for being connected with an external driving device, and the electric core assembly (1) and the rotating shaft (2) can rotate under the driving of the external driving device.

2. The energy storage module of claim 1, wherein, The rotating shaft (2) is rotatably connected with the supporting wheel (12), the supporting wheel (12) can rotate around the rotating shaft (2); or the rotating shaft (2) is fixedly connected with the supporting wheel (12), the rotating shaft (2) is used for being rotatably connected with an external device, or is used for being connected with an external driving device.

3. The energy storage module of claim 1, wherein, The supporting wheel (12) is provided with a central hole (121) penetrating through the supporting wheel (12) along the axial direction of the supporting wheel (12), the rotating shaft (2) is inserted into the central hole (121), and the two ends of the rotating shaft (2) respectively extend to opposite sides of the supporting wheel (12).

4. The energy storage module of claim 1, wherein, The electric core assembly (1) further comprises a flying disc (13), the flying disc (13) is arranged on at least one side of the supporting wheel (12) along the axial direction thereof; the flying disc (13) is provided with a plurality of mounting grooves (131) on the surface close to the electric core units (11), the plurality of mounting grooves (131) respectively correspond to the plurality of electric core units (11), and the end of each electric core unit (11) is inserted and fixed in a corresponding mounting groove (131).

5. The energy storage module of claim 4, wherein, A clamping hole (132) is arranged at the middle position of the flying disc (13), the supporting wheel (12) is inserted into the clamping hole (132), so that the flying disc (13) is sleeved on the supporting wheel (12).

6. The energy storage module of claim 4, wherein, The flying disc (13) is arranged on opposite sides of the supporting wheel (12) along the axial direction thereof, and the opposite ends of each electric core unit (11) are respectively inserted and fixed in the mounting grooves (131) of the flying discs (13) on the opposite sides.

7. The energy storage module of claim 4, wherein, The electric core assembly (1) further comprises a pole row (14) arranged on at least one side of the support wheel (12) along the axial direction thereof; each of the electric core units (11) comprises at least one electric core (111), and the pole lug (111a) of the electric core (111) is arranged corresponding to the pole row (14), and the pole row (14) is electrically connected with the pole lug (111a) of the electric core (111) in the plurality of electric core units (11) at the same time.

8. The energy storage module of claim 7, wherein, The pole row (14) is arranged on opposite sides of the support wheel (12) along the axial direction thereof, and the two pole lugs (111a) of the electric core (111) are arranged on opposite ends of the electric core (111) respectively, and the two pole lugs (111a) of the electric core (111) are electrically connected with the pole rows (14) on the opposite sides respectively.

9. The energy storage module of claim 7, wherein, The pole row (14) is located on the side of the flying disc (13) away from the electric core unit (11), and the flying disc (13) is provided with a containing groove (133) on the surface of the side away from the electric core unit (11), and the pole row (14) is arranged in the containing groove (133).

10. The energy storage module of claim 9, wherein, The flying disc (13) is provided with a through hole (134) on the position corresponding to the pole lug (111a), and the pole lug (111a) of the electric core (111) is electrically connected with the pole row (14) after passing through the through hole (134).

11. The energy storage module of claim 7, wherein, The pole row (14) comprises a plurality of current collecting sheets (140), and the plurality of current collecting sheets (140) are arranged in a ring structure along the circumferential direction of the rotating shaft (2), and the plurality of current collecting sheets (140) correspond to the plurality of electric core units (11) respectively, and each of the current collecting sheets (140) is electrically connected with the pole lug (111a) of the electric core (111) in the corresponding electric core unit (11).

12. The energy storage module of claim 11, wherein, The current collecting sheet (140) comprises an electrical connection part (141) and an engaging part (142) connected with the end of the electrical connection part (141), the electrical connection part (141) is electrically connected with the pole lug (111a) of the electric core (111), and the engaging parts (142) of two adjacent current collecting sheets (140) are connected.

13. The energy storage module of claim 12, wherein, The engaging part (142) comprises a first recessed part (1422) and a second recessed part (1423), and the first recessed part (1422) and the second recessed part (1423) are located at opposite ends of the engaging part (142) respectively; the engaging part (142) has opposite first and second surfaces, the first recessed part (1422) is recessed from the first surface towards the side close to the second surface, and the second recessed part (1423) is recessed from the second surface towards the side close to the first surface; in two adjacent current collecting sheets (140), the first recessed part (1422) of one of the current collecting sheets (140) and the second recessed part (1423) of the other current collecting sheet (140) are overlapped together.

14. The energy storage module of claim 13, wherein, The engaging portion (142) further comprises a main body portion (1421), and the first recessed portion (1422) and the second recessed portion (1423) are respectively arranged at opposite ends of the main body portion (1421); the sum of the thicknesses of the first recessed portion (1422) and the second recessed portion (1423) is equal to the thickness of the main body portion (1421), so that the surfaces of the engaging portions (142) of two adjacent current collecting tabs (140) are flush after the engaging portions (142) of the two adjacent current collecting tabs (140) are overlapped.

15. The energy storage module of claim 7, wherein, The electric cell assembly (1) further comprises a current collecting disc (15), which is arranged on the side of the pole row (14) away from the electric cell unit (11) and is electrically connected with the pole row (14).

16. The energy storage module of claim 15, wherein, The current collecting disc (15) comprises a concentrically arranged outer ring (151) and an inner ring (152), the diameter of the outer ring (151) is greater than the diameter of the inner ring (152), the outer ring (151) is arranged around the inner ring (152), the outer ring (151) and the inner ring (152) are connected through a current collecting strip (153), the outer ring (151) is in contact with the pole row (14), and the inner ring (152) is sleeved on the rotating shaft (2).

17. The energy storage module of claim 16, wherein, The end surface of the supporting wheel (12) is provided with a clamping groove (122), and the current collecting strip (153) is clamped in the clamping groove (122).

18. The energy storage module of any one of claims 1-17, wherein, The outer surface of the supporting wheel (12) is provided with a clamping groove (123), and the side of the electric cell unit (11) is inserted into the clamping groove (123).

19. The energy storage module of claim 18, wherein, The electric cell unit (11) comprises a heat dissipation supporting shell (112) and at least one electric cell (111) arranged in the heat dissipation supporting shell (112), the side of the heat dissipation supporting shell (112) is inserted into the clamping groove (123), and the tab (111a) of the electric cell (111) extends out of the heat dissipation supporting shell (112).

20. The energy storage module of any one of claims 1-17, wherein, The supporting wheel (12) is made of an insulating and heat insulating material.

21. The energy storage module of any one of claims 1-17, wherein, The electric cell unit (11) has a square structure, the length direction (L) of the electric cell unit (11) is parallel to the axial direction of the supporting wheel (12), the included angle (a) between the width direction (W) of the electric cell unit (11) and the first tangent plane of the supporting wheel (12) is 45°-90°, and the first tangent plane is the tangent plane at the position where the electric cell unit (11) is in contact with the supporting wheel (12).

22. The energy storage module of any one of claims 1-17, wherein, A plurality of electric cell units (11) are arranged in a radial manner along the circumferential direction of the supporting wheel (12), one end of the electric cell unit (11) away from the supporting wheel (12) is a first end, and there is a gap between the first ends of adjacent electric cell units (11), so that a ventilation groove (113) is formed between the adjacent electric cell units (11).

23. The energy storage module of any one of claims 1-17, wherein, The energy storage module further comprises a cover plate (3), which is arranged on opposite sides of the electric cell assembly (1) and is fixed with the electric cell assembly (1).

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