Cylindrical battery assembly and energy storage power supply

Abstract

The present application belongs to the technical field of batteries. Disclosed are a cylindrical battery assembly and an energy storage power supply. The cylindrical battery assembly comprises a plurality of cylindrical batteries, at least one electrical connecting sheet and at least one first insulating member. Each of the plurality of cylindrical batteries comprises end faces including a first end face and a second end face; the plurality of cylindrical batteries are electrically connected by means of the at least one electrical connecting sheet; and a part or all of each first insulating member in the at least one first insulating member is arranged between a plane where the first end face is located and a plane where the corresponding electrical connecting sheet is located, and each first insulating member is provided with first through holes, the first through holes being configured to provide connection spaces for the cylindrical batteries and the corresponding electrical connecting sheet. The cylindrical battery assembly of the present application can effectively improve an insulation protection effect on the cylindrical batteries, thereby reducing the probability of short circuits occurring during the usage of the cylindrical batteries, and further enhancing the safety.

Description

Cylindrical battery components and energy storage power supplies Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a cylindrical battery assembly and an energy storage power supply. Background Art

[0002] As people's living standards continue to improve, they often use outdoor energy storage power supplies to meet their outdoor power needs. These power supplies contain cylindrical batteries for storing electricity and have multiple output ports for various devices, meeting basic outdoor power needs or emergency power requirements.

[0003] Currently, cylindrical batteries used in outdoor energy storage power supplies on the market may short-circuit during use, which can be dangerous. Summary of the Invention

[0004] In view of this, the purpose of this application is to overcome the deficiencies in the related art and provide a cylindrical battery assembly.

[0005] To solve the above technical problems, this application provides:

[0006] A cylindrical battery assembly includes multiple cylindrical batteries, each of the multiple cylindrical batteries includes an end face, and the end face includes a first end face and a second end face; at least one electrical connection piece, and the multiple cylindrical batteries are electrically connected through the at least one electrical connection piece; and at least one first insulating member, each of the at least one first insulating member is partially or completely arranged between the plane where the first end face is located and the plane where the corresponding electrical connection piece is located, and the first insulating member has a first through hole, and the first through hole is used to provide a connection space between the cylindrical battery and the corresponding electrical connection piece.

[0007] In addition, the cylindrical battery assembly according to the present application may also have the following additional technical features:

[0008] In some embodiments of the present application, the entire first insulating member is arranged between the plane where the first end face is located and the plane where the corresponding electrical connection piece is located, the outer edge of the first insulating member is circular, and the first insulating member basically covers or completely covers the outer edge of the first end face.

[0009] In some embodiments of the present application, a first electrode is provided on one side of the first end surface of the cylindrical battery, and the shape of the first through hole matches the shape of the first electrode.

[0010] In some embodiments of the present application, an adhesive layer is provided on a side of the first insulating member facing the first end surface.

[0011] In some embodiments of the present application, the entire first insulating member is arranged between the plane where the first end face is located and the plane where the electrical connection piece is located, the number of the first through holes is at least two, and one first through hole corresponds to one first end face.

[0012] In some embodiments of the present application, the first insulating member includes at least one first connecting portion and at least two main body portions, one main body portion has a first through hole, and a first connecting portion is used for connecting between two adjacent main body portions, and the outer edge shape of the portion of each main body portion of the at least two main body portions that is not connected to the first connecting portion matches the outer edge shape of the first end face.

[0013] In some embodiments of the present application, an adhesive layer is provided on a side of the main body facing the first end surface.

[0014] In some embodiments of the present application, a circuit board is also included, and the entire first insulating member is arranged between the plane where the first end face is located and the plane where the corresponding electrical connecting piece is located. The circuit board is electrically connected to at least one electrical connecting piece, and the circuit board is fixed to one side of multiple cylindrical batteries through at least one electrical connecting piece.

[0015] In some embodiments of the present application, a heat insulating member is further included, and the heat insulating member is disposed between the circuit board and the plurality of cylindrical batteries.

[0016] In some embodiments of the present application, the thermal insulation component is located in the area where the circuit board is located.

[0017] In some embodiments of the present application, a buffer member is further included. The buffer member is disposed between the heat insulating member and the plurality of cylindrical batteries and is located within the region where the heat insulating member is located.

[0018] In some embodiments of the present application, the first insulating member is provided with a plurality of first accommodating grooves for accommodating cylindrical batteries, each of the plurality of first accommodating grooves faces the side of the cylindrical battery, a first side plate is provided on one side of the first accommodating groove, the first side plate is provided with a first through hole at each first accommodating groove, and the first side plate is provided between the plane where the first end face is located and the plane where the corresponding electrical connection plate is located.

[0019] In some embodiments of the present application, the first insulating member is provided with a second side plate arranged opposite to the first side plate, the first accommodating groove is located between the first side plate and the second side plate, the second side plate is provided with a first through hole at each first accommodating groove, and the second side plates are all arranged between the plane where the first end face is located and the plane where the corresponding electrical connection plate is located.

[0020] In some embodiments of the present application, the first through hole of the first side plate and the first through hole of the second side plate have the same diameter and are centrally symmetrical.

[0021] In some embodiments of the present application, the first side plate has a second receiving groove on a side away from the cylindrical battery, and the second receiving groove is used to accommodate the corresponding electrical connection piece.

[0022] In some embodiments of the present application, at least one second insulating member is further included to cover the corresponding electrical connection piece.

[0023] In some embodiments of the present application, the second insulating member is received in the second receiving groove.

[0024] In some embodiments of the present application, the first side plate is provided with at least one second connection portion on a side away from the cylindrical battery for installing a heat dissipation fan.

[0025] In some embodiments of the present application, the first insulating member is provided with a plurality of first accommodating grooves for accommodating a plurality of cylindrical batteries, each of the plurality of first accommodating grooves faces the end face of the cylindrical battery, and the first insulating member is further provided with a limiting portion at one end of the first accommodating groove, the limiting portion having a first through hole, and the limiting portion is arranged between the plane where the first end face is located and the plane where the corresponding electrical connection piece is located.

[0026] In some embodiments of the present application, the plurality of first receiving grooves are in a honeycomb or matrix shape.

[0027] In some embodiments of the present application, a circuit board is further included, and the first insulating member is provided with a third connecting portion for connecting to the circuit board.

[0028] In some embodiments of the present application, the limiting portion is mesh-shaped.

[0029] In some embodiments of the present application, the limiting portion is provided with a first groove at the first through hole, so as to avoid the liquid injection hole of the cylindrical battery.

[0030] In some embodiments of the present application, the first insulating member is further provided with a plurality of protrusions on a side away from the cylindrical battery. The plurality of protrusions and the limiting portion form a second receiving groove for accommodating the corresponding electrical connection piece.

[0031] In some embodiments of the present application, each of the plurality of protrusions is provided with a second through hole.

[0032] In some embodiments of the present application, the first insulating member has a first surface and a second surface, the first accommodating groove passes through the first surface and the second surface, the limiting portion includes a transition portion and a supporting portion, the transition portion is connected to the first surface, and the supporting portion is used to support the cylindrical battery.

[0033] In some embodiments of the present application, there is a gap between the support portion and the second surface.

[0034] In some embodiments of the present application, the height of the gap is 0.4 mm to 0.7 mm.

[0035] In some embodiments of the present application, the first insulating member is provided with a first shell and a second shell, the first shell and the second shell form a accommodating space, and are respectively provided with a plurality of first accommodating grooves for accommodating a plurality of cylindrical batteries, each of the plurality of first accommodating grooves faces the end face of the cylindrical battery, and the first shell and the second shell are respectively provided with a limiting portion at one end of their respective plurality of first accommodating grooves, the limiting portion having a first through hole, and the limiting portion is arranged between the plane where the first end face is located and the plane where the corresponding electrical connecting piece is located.

[0036] In some embodiments of the present application, the first shell and the second shell are provided with a plurality of protrusions on a side away from the cylindrical battery. The plurality of protrusions and the limiting portion form a second receiving groove for accommodating the corresponding electrical connection piece.

[0037] In some embodiments of the present application, each of the multiple protrusions is provided with a second through hole, the first shell is provided with a fourth connecting portion on a side facing the cylindrical battery at part of the second through hole, and the second shell is provided with a fifth connecting portion for connecting the fourth connecting portion.

[0038] In some embodiments of the present application, each of at least one electrical connection sheet includes at least two electrical connection sheet units and a sixth connection portion, at least two electrical connection sheet units are connected through the sixth connection portion, and each of at least two electrical connection sheet units includes a hollow portion, a first electrical connection portion, and a second electrical connection portion, and the hollow portion separates the first electrical connection portion and the second electrical connection portion.

[0039] In some embodiments of the present application, the hollow portion has one or more structures of a straight line, an I-shape, a cross-shape, a Z-shape, an S-shape or an H-shape.

[0040] In some embodiments of the present application, the width of the hollow portion is 0.5 mm to 1.5 mm.

[0041] In some embodiments of the present application, the electrical connection piece has one or more of a first arc-shaped structure, a second arc-shaped structure, or a square structure.

[0042] In some embodiments of the present application, the electrical connection piece has a first arc-shaped structure, and the diameter of the first arc-shaped structure is smaller than the diameter of the cylindrical battery.

[0043] In some embodiments of the present application, the electrical connection sheet has a first arc-shaped structure, and the diameter of the first arc-shaped structure is 6 mm to 8 mm smaller than the diameter of the cylindrical battery.

[0044] In some embodiments of the present application, the electrical connection sheet has a square structure, and the sixth connection portion has a square structure.

[0045] In some embodiments of the present application, the electrical connection sheet further includes a sampling portion.

[0046] In some embodiments of the present application, the width of the sampling portion is smaller than the width of the sixth connecting portion.

[0047] In some embodiments of the present application, the hollow portion has one or more structures of an I-type, a cross-type, or an H-type, and the first electrical connection portion and / or the second electrical connection portion has a bending portion.

[0048] In some embodiments of the present application, the corresponding electrical connection piece on the first insulating member is located in the area where the first insulating member is located.

[0049] In some embodiments of the present application, the cylindrical battery further includes a first electrode and a second electrode, and the sixth connecting portion includes a series segment and a parallel segment, the series segment is used for electrical connection between the first electrode of one cylindrical battery and the second electrode of another cylindrical battery, and the parallel segment is used for electrical connection between the first electrode of one cylindrical battery and the first electrode of another cylindrical battery, and the width of the series segment is greater than the width of the parallel segment.

[0050] In some embodiments of the present application, the ratio of the width of the series segment to the width of the parallel segment is 1.5 to 7.

[0051] In a second aspect, an embodiment of the present application further provides an energy storage power supply, comprising a housing and the cylindrical battery assembly described in any of the above embodiments, wherein the cylindrical battery assembly is disposed in the housing.

[0052] Compared with the related art, the beneficial effects of this application are:

[0053] The present application proposes a cylindrical battery assembly, which includes a plurality of cylindrical batteries, at least one electrical connection piece, and at least one first insulating member. The cylindrical battery has a first end face and a second end face arranged opposite to each other. The plurality of cylindrical batteries are electrically connected to the electrical connection piece to achieve series and parallel connection, so as to improve the voltage, current and capacity of the cylindrical battery assembly. Part or all of the first insulating member is arranged between the plane where the first end face is located and the plane where the electrical connection piece is located. This can further improve the insulation protection effect of the cylindrical battery on the basis of the insulation protection of the heat shrink film, thereby reducing the probability of short circuit of the cylindrical battery during use, thereby improving safety. A first through hole is opened on the first insulating member to provide a connection space for the cylindrical battery and the electrical connection piece, so as to facilitate the electrical connection piece to contact the electrode of the cylindrical battery to achieve electrical connection, thereby enabling the plurality of cylindrical batteries to be electrically connected to the electrical connection piece to achieve series and parallel connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0055] FIG1 shows an exploded schematic diagram of a cylindrical battery assembly in some embodiments of the present application.

[0056] FIG2 shows a perspective schematic diagram 1 of a cylindrical battery assembly in some embodiments of the present application.

[0057] FIG3 shows a second perspective schematic diagram of a cylindrical battery assembly in some embodiments of the present application.

[0058] FIG4 shows a first perspective schematic diagram of an electrical connection sheet in some embodiments of the present application.

[0059] FIG5 shows a third perspective schematic diagram of a cylindrical battery assembly in some embodiments of the present application.

[0060] FIG6 shows a second exploded schematic diagram of a cylindrical battery assembly in some embodiments of the present application.

[0061] FIG7 shows a fourth perspective schematic diagram of a cylindrical battery assembly in some embodiments of the present application.

[0062] FIG8 shows a second three-dimensional schematic diagram of the electrical connecting piece in some embodiments of the present application.

[0063] FIG9 shows a fifth perspective schematic diagram of a cylindrical battery assembly in some embodiments of the present application.

[0064] FIG10 shows a third exploded schematic diagram of a cylindrical battery assembly in some embodiments of the present application.

[0065] FIG11 shows a sixth perspective schematic diagram of a cylindrical battery assembly in some embodiments of the present application.

[0066] FIG12 is an enlarged schematic diagram of the structure of section A in FIG11 .

[0067] FIG13 shows a first perspective schematic diagram of the first insulating member in some embodiments of the present application.

[0068] FIG14 shows a second perspective schematic diagram of the first insulating member in some embodiments of the present application.

[0069] FIG15 shows a third perspective schematic diagram of the electrical connecting piece in some embodiments of the present application.

[0070] FIG16 shows a seventh perspective schematic diagram of a cylindrical battery assembly in some embodiments of the present application.

[0071] FIG. 17 is an enlarged schematic diagram of the structure of section B in FIG. 13 .

[0072] FIG. 18 is an enlarged schematic diagram of the structure of section C in FIG. 10 .

[0073] FIG. 19 shows a schematic cross-sectional view of FIG. 18 .

[0074] Explanation of the main component symbols: 100-cylindrical battery assembly; 110-cylindrical battery; 111-first end face; 112-second end face; 113-first electrode; 114-injection hole; 115-second electrode; 120-electrical connecting piece; 121-electrical connecting piece unit; 1211-hollow portion; 1212-first electrical connecting portion; 1213-second electrical connecting portion; 1214-bending portion; 122-sixth connecting portion; 1221-series section; 1222-parallel section; 123-sampling portion; 124-first arc-shaped structure; 125-square structure; 126-second arc-shaped structure; 130-first insulating member; 131-first through hole; 132-first connecting portion; 133-main body; 134- First accommodating groove; 1341-first side plate; 13411-second accommodating groove; 13412-second connecting portion; 1342-second side plate; 1343-limiting portion; 13431-first groove; 13432-transfer portion; 13433-support portion; 13434-first surface; 13435-second surface; 136-protrusion; 1361-second through hole; 1371-first shell; 13711-fourth connecting portion; 1372-second shell; 13721-fifth connecting portion; 1373-accommodating space; 138-third connecting portion; 140-circuit board; 150-second insulating member; 160-cooling fan; 170-thermal insulating member; 180-buffer member. DETAILED DESCRIPTION

[0075] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0076] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial" or "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present application.

[0077] Furthermore, the terms "first" or "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0078] In this application, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," or "fixed" should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0079] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0080] Currently, cylindrical batteries used in outdoor energy storage power supplies on the market are covered with a thin layer of heat-shrink film on the steel casing to provide insulation and prevent short circuits. However, during subsequent processing, testing, transportation, and long-term use, the heat-shrink film on cylindrical batteries is prone to damage, which can cause short circuits during use, creating a dangerous situation.

[0081] To solve the above problems, as shown in FIG1 , an embodiment of the present application provides a cylindrical battery assembly 100 , which is primarily used for energy storage power supplies. The cylindrical battery assembly 100 includes a plurality of cylindrical batteries 110 , at least one electrical connection sheet 120 , and at least one first insulating member 130 .

[0082] Referring to Figures 2 and 3 , a cylindrical battery 110 includes end surfaces, including a first end surface 111 and a second end surface 112. Multiple cylindrical batteries 110 are electrically connected via an electrical connection sheet 120. A first insulating member 130 is partially or entirely disposed between the plane of the first end surface 111 and the plane of the electrical connection sheet 120. The first insulating member 130 has a first through hole 131. The first through hole 131 is used to provide a connection space between the cylindrical battery 110 and the electrical connection sheet 120, while effectively isolating the electrical connection sheet 120 from the first end surface 111 or the second end surface 112 of the cylindrical battery 110.

[0083] In the cylindrical battery assembly 100 provided in the embodiments of the present application, multiple cylindrical batteries 110 are electrically connected to the electrical connection sheet 120 to achieve series and parallel connection, thereby increasing the voltage, current, and capacity of the cylindrical battery assembly 100. Disposing part or all of the first insulating member 130 between the plane of the first end face 111 and the plane of the electrical connection sheet 120 further enhances the insulation protection provided by the heat shrink film for the cylindrical batteries 110, thereby reducing the probability of short circuits in the cylindrical batteries 110 during use and improving safety.

[0084] A first through hole 131 is provided on the first insulating member 130 to provide a connection space between the cylindrical battery 110 and the electrical connection piece 120, thereby facilitating contact between the electrical connection piece 120 and the electrodes of the cylindrical battery 110 to achieve electrical connection, thereby enabling multiple cylindrical batteries 110 to be connected in series and in parallel through electrical connection with the electrical connection piece 120.

[0085] For example, the electrical connection piece 120 may be made of a conductive metal material, such as copper, aluminum, or silver, and the first insulating member 130 may be made of highland barley paper having strong high temperature resistance and strong insulating properties.

[0086] As shown in Figures 1, 2, and 3, in one embodiment of the present application, optionally, the entire first insulating member 130 is disposed between the plane where the first end face 111 is located and the plane where the electrical connection piece 120 is located, the outer edge of the first insulating member 130 is circular, and the first insulating member 130 substantially covers or completely covers the outer edge of the first end face 111. Thus, disposing the entire first insulating member 130 between the plane where the first end face 111 is located and the plane where the electrical connection piece 120 is located, and substantially covering or completely covering the outer edge of the first end face 111, can further enhance the insulation protection effect of the cylindrical battery 110, thereby further reducing the probability of short circuiting of the cylindrical battery 110 during use, thereby further enhancing safety. In addition, the outer edge of the first insulating member 130 is circular to match the outer edge of the first end face 111 of the cylindrical battery 110.

[0087] As shown in Figures 1 and 3, in one embodiment of the present application, a cylindrical battery 110 is optionally provided with a first electrode 113 on one side of a first end surface 111, and the shape of the first through hole 131 matches the shape of the first electrode 113. This, on the one hand, serves to avoid the first electrode 113 and provide a connection space between the electrical connection piece 120 and the first electrode 113; on the other hand, it can maximize coverage of the first end surface 111, thereby maximizing the insulation protection effect of the cylindrical battery 110. For example, the first electrode 113 can be a positive electrode column.

[0088] In one embodiment of the present application, an adhesive layer is optionally provided on the side of the first insulating member 130 facing the first end face 111, so that the first insulating member 130 is firmly mounted on the first end face 111 via the adhesive layer, thereby improving the installation stability of the first insulating member 130 and further ensuring the stability of the insulation protection effect of the cylindrical battery 110. Exemplarily, the first insulating member 130 is a single-sided adhesive-backed highland barley paper, and the adhesive-backed surface can be directly adhered to the first end face 111 or the second end face 112 of the cylindrical battery 110.

[0089] As shown in Figures 1 and 3, in one embodiment of the present application, optionally, the entire first insulating member 130 is arranged between the plane where the first end face 111 is located and the plane where the electrical connecting piece 120 is located, and the first insulating member 130 includes at least two first through holes 131, one first through hole 131 corresponds to one first end face 111, so that two or more cylindrical batteries 110 share one first insulating member 130, thereby effectively improving the installation efficiency of the first insulating member 130.

[0090] As shown in Figures 1 and 3, in one embodiment of the present application, the first insulating member 130 is optionally further provided with at least one first connecting portion 132 and at least two main body portions 133. The main body portion 133 has a first through hole 131. The first connecting portion 132 is used to connect the main body portions 133. The outer edge shape of the portion of the main body portion 133 not connected to the first connecting portion 132 matches the outer edge shape of the first end face 111. Thus, at least one connecting portion 132 and at least two main body portions 133 are provided, and one main body portion 133 corresponds to the first end face 111 of a cylindrical battery 110, so that each first insulating member 130 can be provided on at least two cylindrical batteries 110, thereby effectively improving installation efficiency. The outer edge shape of the portion of the main body portion 133 not connected to the first connecting portion 132 is provided to match the outer edge shape of the first end face 111 to maximize coverage of the first end face 111, thereby maximizing the insulation protection effect on the cylindrical battery 110.

[0091] In one embodiment of the present application, optionally, an adhesive layer is provided on the side of the main body 133 facing the first end face 111, so that the main body 133 is firmly set on the first end face 111 through the adhesive layer, so that the first insulating member 130 is firmly set on the first end face 111 as a whole, thereby improving the installation stability of the first insulating member 130, and further ensuring the stability of the insulation protection effect of the cylindrical battery 110.

[0092] As shown in Figures 1, 2 and 3, in one embodiment of the present application, optionally, the cylindrical battery assembly 100 further includes a circuit board 140, the entire first insulating member 130 is disposed between the plane where the first end face 111 is located and the plane where the electrical connection piece 120 is located, the circuit board 140 is electrically connected to the electrical connection piece 120, and the circuit board 140 is fixed to one side of the cylindrical battery 110 through the electrical connection piece 120. Thus, the circuit board 140 fixed to one side of the cylindrical battery 110 is electrically connected to the electrical connection piece 120, so as to realize the charging and discharging functions of the cylindrical battery 110 through the circuit board 140. Exemplarily, the circuit board 140 may be a battery management system (BMS).

[0093] As shown in FIG1 , in one embodiment of the present application, the cylindrical battery assembly 100 optionally further includes a heat insulator 170 disposed between the circuit board 140 and the cylindrical battery 110. The heat insulator 170 is located within the region where the circuit board 140 is located. Thus, the heat insulator 170 is disposed between the circuit board 140 and the cylindrical battery 110 to provide insulation, thereby preventing the heat generated by the cylindrical battery 110 from affecting the circuit board 140.

[0094] As shown in FIG1 , in one embodiment of the present application, the cylindrical battery assembly 100 optionally further includes a buffer member 180, which is disposed between the thermal insulation member 170 and the cylindrical battery 110 and located within the region where the thermal insulation member 170 is located. Thus, the buffer member 180 is disposed between the thermal insulation member 170 and the cylindrical battery 110 and within the region where the thermal insulation member 170 is located, thereby providing a buffering and vibration reduction function, thereby reducing the impact on the cylindrical battery 110 and the circuit board 140 during transportation, thereby facilitating a longer service life of the cylindrical battery 110 and the circuit board 140.

[0095] As shown in Figures 5, 6 and 7, in one embodiment of the present application, optionally, the first insulating member 130 is provided with a plurality of first accommodating grooves 134 for accommodating the cylindrical batteries 110, the first accommodating grooves 134 face the side of the cylindrical battery 110, and a first side plate 1341 is provided on one side of the first accommodating groove 134. The first side plate 1341 is provided with a first through hole 131 at each first accommodating groove 134, and the first side plate 1341 is provided between the plane where the first end face 111 is located and the plane where the electrical connecting piece 120 is located.

[0096] Therefore, a plurality of first receiving grooves 134 for receiving the cylindrical batteries 110 are provided on the side of the first insulating member 130 facing the cylindrical batteries 110, thereby providing space for receiving and installing the plurality of cylindrical batteries 110. A first side plate 1341 is provided on one side of the first receiving groove 134, located between the plane where the first end surface 111 is located and the plane where the electrical connection plate 120 is located. The first side plate 1341 is provided with a first through hole 131 at each first receiving groove 134, thereby providing a connection space between the cylindrical battery 110 and the electrical connection plate 120, thereby facilitating contact between the electrical connection plate 120 and the electrodes of the cylindrical battery 110 to achieve electrical connection. This allows the plurality of cylindrical batteries 110 to be connected in series and in parallel through electrical connection with the electrical connection plate 120, thereby increasing the voltage, current, and capacity of the cylindrical battery assembly 100.

[0097] As shown in Figures 5, 6 and 7, in one embodiment of the present application, optionally, the first insulating member 130 is further provided with a second side plate 1342 arranged opposite to the first side plate 1341, the first accommodating groove 134 is located between the first side plate 1341 and the second side plate 1342, the second side plate 1342 is provided with a first through hole 131 at each first accommodating groove 134, and the first side plate 1341 and the second side plate 1342 are both arranged between the plane where the first end face 111 is located and the plane where the electrical connecting piece 120 is located.

[0098] Therefore, the first side plate 1341 and the second side plate 1342 are both arranged between the plane where the first end face 111 is located and the plane where the electrical connection plate 120 is located. This can further improve the insulation protection effect of the cylindrical battery 110 on the basis of the insulation protection of the heat shrink film, thereby reducing the probability of short circuit of the cylindrical battery 110 during use, thereby improving safety.

[0099] The first side plate 1341 and the second side plate 1342 are provided with a first through hole 131 at each first receiving groove 134, so as to provide a connection space for the cylindrical battery 110 and the electrical connection piece 120, thereby facilitating the electrical connection piece 120 to contact the electrodes of the cylindrical battery 110 to achieve electrical connection, thereby enabling multiple cylindrical batteries 110 to be connected in series and in parallel through electrical connection with the electrical connection piece 120.

[0100] As shown in Figure 6, in one embodiment of the present application, optionally, the first through hole 131 of the first side plate 1341 and the first through hole 131 of the second side plate 1342 have the same diameter and are centrally symmetrical, so as to respectively adapt to the shapes of the positive and negative poles of the cylindrical battery 110, so that the electrical connection portion of the electrical connection sheet 120 can adopt a common shape, thereby improving versatility and further facilitating improving the production efficiency of the electrical connection sheet 120.

[0101] As shown in Figures 6 and 7, in one embodiment of the present application, the first side plate 1341 optionally has a second receiving groove 13411 on a side away from the cylindrical battery 110. The second receiving groove 13411 is used to receive the electrical connection piece 120. Therefore, the second receiving groove 13411 is provided on the side of the first side plate 1341 away from the cylindrical battery 110 to receive the electrical connection piece 120, thereby providing a space for receiving and installing the electrical connection piece 120.

[0102] As shown in Figures 1, 5 and 6, in one embodiment of the present application, optionally, the cylindrical battery assembly 100 further includes at least one second insulating member 150 for covering the electrical connection sheet 120. Thus, the second insulating member 150 for covering the electrical connection sheet 120 is provided, which can further enhance the insulation protection effect, thereby further enhancing safety, thereby preventing the electrical connection sheet 120 from contacting the circuit board 140, the housing of the energy storage power supply or other components to cause leakage or short circuit problems. Exemplarily, the second insulating member 150 can be highland barley paper with strong high temperature resistance and strong insulation. The second insulating member 150 can also be a glass fiber board with strong high temperature resistance, strong insulation and high hardness, which not only enhances safety, but also plays the role of supporting the cylindrical battery 110 as a whole, making the cylindrical battery assembly 100 a whole, thereby facilitating installation as a whole, thereby effectively improving installation efficiency and stability.

[0103] As shown in FIG5 and FIG6 , in one embodiment of the present application, optionally, the second insulating member 150 is received in the second receiving groove 13411. Thus, the second insulating member 150 is received and installed.

[0104] As shown in Figures 5, 6, and 7, in one embodiment of the present application, the first side plate 1341 is optionally provided with at least one second connection portion 13412 on a side away from the cylindrical battery 110 for mounting a cooling fan 160. Thus, at least one second connection portion 13412 is provided on a side of the first side plate 1341 away from the cylindrical battery 110, so that the cooling fan 160 can be mounted on the first side plate 1341 via the second connection portion 13412, thereby achieving a heat dissipation function for the cylindrical battery assembly 100, thereby helping to extend the service life of the circuit board 140 and the cylindrical battery 110.

[0105] As shown in Figures 9, 10, 12 and 13, in one embodiment of the present application, optionally, the first insulating member 130 is further provided with a plurality of first accommodating grooves 134 for accommodating the cylindrical batteries 110, the first accommodating grooves 134 facing the end faces of the cylindrical batteries 110, and the first insulating member 130 is further provided with a limiting portion 1343 at one end of the first accommodating groove 134, the limiting portion 1343 having a first through hole 131, and the limiting portion 1343 is arranged between the plane where the first end face 111 is located and the plane where the electrical connecting piece 120 is located.

[0106] Therefore, a plurality of first receiving grooves 134 for receiving cylindrical batteries 110 are provided on the end surface of the first insulating member 130 facing the cylindrical battery 110, thereby providing space for receiving and installing the plurality of cylindrical batteries 110. A stopper 1343 is provided between the plane where the first end surface 111 is located and the plane where the electrical connection sheet 120 is located, and a first through-hole 131 is provided at each first receiving groove 134 of the stopper 1343 to provide connection space between the cylindrical battery 110 and the electrical connection sheet 120, thereby facilitating contact between the electrical connection sheet 120 and the electrodes of the cylindrical battery 110 to achieve electrical connection. This allows the plurality of cylindrical batteries 110 to be connected in series and in parallel through electrical connection with the electrical connection sheet 120, thereby increasing the voltage, current, and capacity of the cylindrical battery assembly 100.

[0107] As shown in Figures 13 and 14, in one embodiment of the present application, optionally, the plurality of first receiving grooves 134 are in a honeycomb or matrix shape, so that the plurality of cylindrical batteries 110 are arranged in a honeycomb or matrix shape to improve the space utilization and energy density of the cylindrical battery assembly 100.

[0108] As shown in Figures 1 and 16, in one embodiment of the present application, the cylindrical battery assembly 100 optionally further includes a circuit board 140, and the first insulating member 130 is provided with a third connecting portion 138 for connecting to the circuit board 140. Thus, the circuit board 140 is mounted on the first insulating member 130 via the third connecting portion 138, thereby achieving a stable installation of the circuit board 140.

[0109] As shown in FIG. 11 , FIG. 12 and FIG. 13 , in one embodiment of the present application, optionally, the limiting portion 1343 is in a mesh shape, so that the plurality of cylindrical batteries 110 are arranged in a mesh shape to improve the space utilization and energy density of the cylindrical battery assembly 100 .

[0110] As shown in Figures 10, 11, 12, and 18, in one embodiment of the present application, the limiting portion 1343 optionally has a first groove 13431 at the first through hole 131, which is used to avoid the injection hole 114 of the cylindrical battery 110. Therefore, the first groove 13431 is provided at the limiting portion 1343 at the first through hole 131 to avoid the injection hole 114 of the cylindrical battery 110.

[0111] As shown in Figures 9, 11 and 12, in one embodiment of the present application, optionally, the first insulating member 130 is further provided with a plurality of protrusions 136 on a side away from the cylindrical battery 110, and the protrusions 136 and the limiting portion 1343 form a second accommodating groove 13411, and the second accommodating groove 13411 is used to accommodate the electrical connecting piece 120 to achieve the accommodation and installation of the electrical connecting piece 120.

[0112] As shown in FIG. 9 and FIG. 11 to FIG. 14 , in one embodiment of the present application, optionally, the protrusion 136 is provided with a second through hole 1361 , so that the first shell 1371 and the second shell 1372 can be firmly connected as one through bolts.

[0113] As shown in Figures 13, 17 and 18, in one embodiment of the present application, optionally, the first insulating member 130 has a first surface 13434 and a second surface 13435, the first accommodating groove 134 passes through the first surface 13434 and the second surface 13435, the limiting portion 1343 includes a connecting portion 13432 and a supporting portion 13433, the connecting portion 13432 is connected to the first surface 13434, and the supporting portion 13433 is used to support the cylindrical battery 110, so that the connecting portion 13432 and the supporting portion 13433 define a limiting groove that is adapted to the outer shape of the cylindrical battery 110, thereby playing a role of radial limitation and axial support for the cylindrical battery 110, and thus the cylindrical battery 110 is firmly installed in the first accommodating groove 134, thereby effectively improving the stability of use.

[0114] As shown in Figures 18 and 19, in one embodiment of the present application, a gap optionally exists between the support portion 13433 and the second surface 13435. During the manufacturing process of the first insulating member 130, due to the injection molding process, burrs or thickening may appear on the support portion 13433 in the direction toward the first surface 13434. This burr or thickening may cause a gap between the first end surface 111 of the cylindrical battery 110 and the second surface 13435, thereby hindering the stable electrical connection between the positive and negative electrodes of the cylindrical battery 110 and the electrical connection piece 120. The gap between the support portion 13433 and the second surface 13435 can offset the gap caused by the burrs or thickening.

[0115] In one embodiment of the present application, optionally, the height of the gap along the direction indicated by the dotted arrow in Figure 19 is 0.4 mm to 0.7 mm, and optimally 0.4 mm or 0.7 mm.

[0116] As shown in Figures 13 and 14, in one embodiment of the present application, optionally, the first insulating member 130 is further provided with a first shell 1371 and a second shell 1372, the first shell 1371 and the second shell 1372 form a accommodating space 1373, and are respectively provided with a plurality of corresponding first accommodating grooves 134 for accommodating the cylindrical batteries 110, the first accommodating grooves 134 facing the end faces of the cylindrical batteries 110, the first shell 1371 and the second shell 1372 are respectively provided with limiting portions 1343 at one end of the first accommodating grooves 134, the limiting portion 1343 has a first through hole 131, and the limiting portion 1343 is arranged between the plane where the first end face 111 is located and the plane where the electrical connecting piece 120 is located.

[0117] Thus, a plurality of first receiving grooves 134 for accommodating cylindrical batteries 110 are provided on the end surfaces of the first shell 1371 and the second shell 1372 facing the cylindrical batteries 110, providing an accommodating space 1373 for the plurality of cylindrical batteries 110, so that the plurality of cylindrical batteries 110 are enclosed within the accommodating space 1373. A stopper 1343 is provided between the plane where the first end surface 111 is located and the plane where the electrical connection sheet 120 is located, and a first through-hole 131 is provided in each first receiving groove 134 of the stopper 1343 to provide a connection space between the cylindrical battery 110 and the electrical connection sheet 120, thereby facilitating contact between the electrical connection sheet 120 and the electrodes of the cylindrical battery 110 to achieve electrical connection. This allows the plurality of cylindrical batteries 110 to be connected in series and in parallel through electrical connection with the electrical connection sheet 120, thereby increasing the voltage, current, and capacity of the cylindrical battery assembly 100.

[0118] As shown in Figures 12, 13, 14 and 18, in one embodiment of the present application, optionally, the first shell 1371 and the second shell 1372 are provided with a plurality of protrusions 136 on the side away from the cylindrical battery 110, and the protrusions 136 and the limiting portion 1343 form a second accommodating groove 13411, and the second accommodating groove 13411 is used to accommodate the electrical connection piece 120 to achieve the accommodation and installation of the electrical connection piece 120.

[0119] As shown in Figures 12, 13, 14 and 18, in one embodiment of the present application, optionally, the protrusion 136 is provided with a second through hole 1361, the first shell 1371 is provided with a fourth connecting portion 13711 on the side facing the cylindrical battery 110 at part of the second through hole 1361, and the second shell 1372 is provided with a fifth connecting portion 13721 for connecting the fourth connecting portion 13711, so that the fourth connecting portion 13711 and the fifth connecting portion 13721 are firmly connected as one by bolts, thereby improving the installation stability of the cylindrical battery 110.

[0120] As shown in Figures 4, 8, and 15, in one embodiment of the present application, the electrical connection sheet 120 optionally includes at least two electrical connection sheet units 121 and a sixth connection portion 122. The electrical connection sheet units 121 are connected via the sixth connection portion 122. The electrical connection sheet units 121 include a hollow portion 1211, a first electrical connection portion 1212, and a second electrical connection portion 1213. The hollow portion 1211 separates the first electrical connection portion 1212 from the second electrical connection portion 1213. Thus, two or more cylindrical batteries 110 share a single electrical connection sheet 120, effectively improving the installation efficiency of the electrical connection sheet 120. The hollow portion 1211 separates the first electrical connection portion 1212 from the second electrical connection portion 1213, facilitating stable contact between the first electrical connection portion 1212 and the second electrical connection portion 1213 and the electrode through welding, thereby improving the contact quality between the electrical connection sheet unit 121 and the electrode, and thereby improving the stability and reliability of the electrical connection.

[0121] As shown in Figures 4, 8, and 15, in one embodiment of the present application, the hollow portion 1211 may optionally have one or more structures selected from the group consisting of a straight line, an I-shaped structure, a cross-shaped structure, a Z-shaped structure, an S-shaped structure, and an H-shaped structure, to provide a welding space between the electrical connection piece unit 121 and the electrode, thereby improving the welding quality of the electrical connection piece unit 121. The specific shape can be designed based on the actual needs of the product, as long as it can expose the electrodes of the cylindrical battery 110, and will not be listed here.

[0122] In one embodiment of the present application, optionally, the width of the hollow portion 1211 in the direction indicated by the dotted arrow in FIG8 is 0.5 mm to 1.5 mm. Thus, by controlling the width of the hollow portion 1211 within the range of 0.5 mm to 1.5 mm, on the one hand, it is possible to prevent the welding between the electrical connection piece unit 121 and the electrode from being affected by the hollow portion 1211 being too small, and on the other hand, it is possible to prevent the contact area between the electrical connection piece unit 121 and the electrode from being too small due to the hollow portion 1211 being too large, thereby affecting the stability and reliability of the electrical connection.

[0123] In one embodiment of the present application, optionally, the electrical connection piece 120 has one or more of a first arc-shaped structure 124 , a second arc-shaped structure 126 , or a square structure 125 .

[0124] As shown in FIG4 , a square structure 125 is provided on the electrical connection piece 120 to provide a clearance for the fasteners, thereby facilitating connection between the fasteners and the housing of the energy storage power supply, thereby allowing the cylindrical battery 110 to be securely installed in the housing of the energy storage power supply.

[0125] As shown in FIG8 , a second arc-shaped structure 126 is provided on the electrical connection piece 120 to position the electrical connection piece 120 during installation, thereby improving the installation efficiency and accuracy of the electrical connection piece 120. A square structure 125 is provided on the electrical connection piece 120 to provide clearance for other structural components, thereby preventing the electrical connection piece 120 from interfering with or making electrical contact with other structures.

[0126] As shown in FIG. 15 , a square structure 125 is provided on the electrical connection piece 120 to position the electrical connection piece 120 during installation, thereby improving the installation efficiency and accuracy of the electrical connection piece 120 .

[0127] As shown in FIG1 , in one embodiment of the present application, the electrical connection piece 120 optionally includes a first arc-shaped structure 124 , the diameter of which is smaller than the diameter of the cylindrical battery 110 . Therefore, by setting the diameter of the first arc-shaped structure 124 smaller than the diameter of the cylindrical battery 110 , the first insulating member 130 can better isolate the electrical connection piece 120 from the first end face 111 or the second end face 112 of the cylindrical battery 110 , thereby enhancing the insulation protection effect of the first insulating member 130 on the cylindrical battery 110 and further reducing the probability of a short circuit in the cylindrical battery 110 during use.

[0128] As shown in FIG1 , in one embodiment of the present application, the electrical connection piece 120 optionally includes a first arc-shaped structure 124, the diameter of which is 6 mm to 8 mm smaller than the diameter of the cylindrical battery 110. This prevents, on the one hand, the electrical connection piece 120 from contacting the first end face 111 or the second end face 112 of the cylindrical battery 110 due to an excessively large diameter of the first arc-shaped structure 124, thereby easily causing a short circuit. On the other hand, it prevents, on the other hand, the positioning, installation, and current conduction effects of the electrical connection piece 120 due to an excessively small diameter of the first arc-shaped structure 124.

[0129] As shown in Figure 15, in one embodiment of the present application, optionally, the electrical connection piece 120 has a square structure 125, and the sixth connection portion 122 has a square structure 125 to play a positioning role in the installation of the electrical connection piece 120, thereby facilitating the improvement of the installation efficiency and installation accuracy of the electrical connection piece 120.

[0130] As shown in Figures 4, 8, and 15, in one embodiment of the present application, the electrical connection sheet 120 optionally further includes a sampling portion 123, so that the circuit board 140 is electrically connected to the electrical connection sheet 120 via the sampling portion 123, thereby sampling the status information of the cylindrical battery 110, where the status information is one or more of voltage, current, or resistance. Exemplarily, the circuit board 140 is a battery management system, which is a control unit of the cylindrical battery 110. The battery management system is electrically connected to the cylindrical battery 110 via the sampling portion 123 and provides overcharge, overtemperature protection, overcurrent, overdischarge, and voltage balancing for the cylindrical battery 110.

[0131] As shown in Figures 8 and 15, in one embodiment of the present application, optionally, the width of the sampling portion 123 along the direction indicated by the dotted arrow in Figure 8 is smaller than the width of the sixth connecting portion 122 along the direction indicated by the dotted arrow in Figure 8, so as to facilitate the electrical connection of the electrical connecting piece 120 to the circuit board 140 through the sampling portion 123 to achieve electrical connection, and avoid structural interference or electrical contact between the sampling portion 123 and other components on the circuit board 140 due to the excessive width of the sampling portion 123.

[0132] As shown in FIG8 , in one embodiment of the present application, optionally, the hollow portion 1211 has one or more structures of an I-type, a cross-type, or an H-type, and the first electrical connection portion 1212 and / or the second electrical connection portion 1213 have a bent portion 1214 to provide welding space between the electrical connection sheet unit 121 and the electrode. The specific shape can be designed according to the actual needs of the product and will not be listed here. The first electrical connection portion 1212 and / or the second electrical connection portion 1213 have a bent portion 1214 so that the first electrical connection portion 1212 and / or the second electrical connection portion 1213 are in close contact with the electrode of the cylindrical battery 110, thereby improving the stability and reliability of the electrical connection.

[0133] As shown in Figures 7 and 9, in one embodiment of the present application, optionally, the electrical connection piece 120 on the first insulating member 130 is located in the area where the first insulating member 130 is located, which not only realizes the accommodation and installation function of the electrical connection piece 120, but also ensures the insulation effect of the first insulating member 130.

[0134] As shown in Figures 10 and 15, in one embodiment of the present application, the cylindrical battery 110 optionally further includes a first electrode 113 and a second electrode 115. The sixth connecting portion 122 includes a series segment 1221 and a parallel segment 1222. The series segment 1221 is used to electrically connect the first electrode 113 of one cylindrical battery to the second electrode 115 of another cylindrical battery, and the parallel segment 1222 is used to electrically connect the first electrode 113 of one cylindrical battery to the first electrode 113 of another cylindrical battery. The width of the series segment 1221 along the direction indicated by the solid arrow in Figure 15 is greater than the width of the parallel segment 1222 along the direction indicated by the dashed arrow in Figure 15. When the cylindrical battery 110 short-circuits due to external compression, internal defects, or external impact, the smaller parallel segment 1222 will fuse, acting as a fuse for safety protection, thereby significantly improving the reliability and safety of the cylindrical battery 110.

[0135] In one embodiment of the present application, optionally, the ratio of the width of the series section 1221 to the width of the parallel section 1222 is between 1.5 and 7.

[0136] An embodiment of the present application further provides an energy storage power supply, comprising a housing and the cylindrical battery assembly described in any of the above embodiments, wherein the cylindrical battery assembly is disposed in the housing.

[0137] The cylindrical battery assembly is the cylindrical battery assembly 100 described in any of the above embodiments, and therefore has all the beneficial effects of the cylindrical battery assembly 100 described in any of the above embodiments, which will not be described in detail here.

[0138] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0139] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A cylindrical battery assembly, characterized in that: The invention comprises a plurality of cylindrical batteries, each of which comprises an end face, wherein the end face comprises a first end face and a second end face; at least one electrical connection sheet, through which the plurality of cylindrical batteries are electrically connected; and at least one first insulating member, each of which is partially or entirely arranged between a plane where the first end face is located and a plane where the corresponding electrical connection sheet is located, and the first insulating member has a first through hole, and the first through hole is used to provide a connection space between the cylindrical battery and the corresponding electrical connection sheet.

2. The cylindrical battery assembly according to claim 1, characterized in that: The entire first insulating member is disposed between a plane where the first end surface is located and a plane where the corresponding electrical connection piece is located, an outer edge of the first insulating member is circular, and the first insulating member substantially covers or completely covers an outer edge of the first end surface.

3. The cylindrical battery assembly according to claim 1 or 2, characterized in that: The cylindrical battery is provided with a first electrode on one side of the first end surface, and the shape of the first through hole matches the shape of the first electrode.

4. The cylindrical battery assembly according to any one of claims 1 to 3, characterized in that: An adhesive layer is provided on a side of the first insulating member facing the first end surface.

5. The cylindrical battery assembly according to any one of claims 1 to 4, characterized in that: The entire first insulating member is disposed between a plane where the first end surface is located and a plane where the corresponding electrical connection sheet is located. The number of the first through holes is at least two, and one first through hole corresponds to one first end surface.

6. The cylindrical battery assembly according to claim 5, characterized in that: The first insulating member includes at least one first connecting portion and at least two main body portions, one main body portion has a first through hole, and one first connecting portion is used for connecting between two adjacent main body portions, and the outer edge shape of the portion of each main body portion of the at least two main body portions that is not connected to the first connecting portion matches the outer edge shape of the first end face.

7. The cylindrical battery assembly according to claim 6, characterized in that: An adhesive layer is disposed on a side of the main body facing the first end surface.

8. The cylindrical battery assembly according to any one of claims 1 to 7, characterized in that: It also includes a circuit board, wherein the entire first insulating member is arranged between the plane where the first end face is located and the plane where the corresponding electrical connecting piece is located, the circuit board is electrically connected to the at least one electrical connecting piece, and the circuit board is fixed to one side of the multiple cylindrical batteries through the at least one electrical connecting piece.

9. The cylindrical battery assembly according to claim 8, characterized in that: A heat insulator is also included, and the heat insulator is disposed between the circuit board and the plurality of cylindrical batteries.

10. The cylindrical battery assembly according to claim 9, characterized in that: The heat insulating member is located in the area where the circuit board is located.

11. The cylindrical battery assembly according to claim 9 or 10, characterized in that: A buffer is also included, which is arranged between the heat insulating member and the plurality of cylindrical batteries and is located in the area where the heat insulating member is located.

12. The cylindrical battery assembly according to any one of claims 1 to 11, characterized in that: The first insulating member is provided with a plurality of first accommodating grooves for accommodating the plurality of cylindrical batteries, each of the plurality of first accommodating grooves faces the side of the cylindrical battery, a first side plate is provided on one side of the first accommodating groove, the first side plate is provided with the first through hole at each first accommodating groove, and the first side plate is provided between the plane where the first end face is located and the plane where the corresponding electrical connecting piece is located.

13. The cylindrical battery assembly according to claim 12, characterized in that: The first insulating member is also provided with a second side plate arranged opposite to the first side plate, the first accommodating groove is located between the first side plate and the second side plate, the second side plate is provided with the first through hole at each first accommodating groove, and the second side plate is arranged between the plane where the first end face is located and the plane where the corresponding electrical connecting plate is located.

14. The cylindrical battery assembly according to claim 13, characterized in that: The first through hole of the first side plate and the first through hole of the second side plate have the same diameter and are centrally symmetrical.

15. The cylindrical battery assembly according to any one of claims 12 to 14, characterized in that: The first side plate has a second receiving groove on a side away from the cylindrical battery, and the second receiving groove is used to receive the corresponding electrical connection sheet.

16. The cylindrical battery assembly according to claim 15, characterized in that: It also includes at least one second insulating member for covering the corresponding electrical connection piece.

17. The cylindrical battery assembly according to claim 16, characterized in that: The second insulating member is received in the second receiving groove.

18. The cylindrical battery assembly according to any one of claims 12 to 17, characterized in that: The first side plate is provided with at least one second connection portion on a side away from the cylindrical battery for installing a heat dissipation fan.

19. The cylindrical battery assembly according to any one of claims 1 to 18, characterized in that: The first insulating member is provided with a plurality of first accommodating grooves for accommodating the plurality of cylindrical batteries, each of the plurality of first accommodating grooves faces the end surface of the cylindrical battery, and the first insulating member is further provided with a limiting portion at one end of the first accommodating groove, the limiting portion having the first through hole, and the limiting portion is arranged between the plane where the first end surface is located and the plane where the corresponding electrical connecting piece is located.

20. The cylindrical battery assembly according to claim 19, characterized in that: The plurality of first containing grooves are in a honeycomb shape or a matrix shape.

21. The cylindrical battery assembly according to claim 19 or 20, characterized in that: A circuit board is also included, and the first insulating member is provided with a third connecting portion for connecting to the circuit board.

22. The cylindrical battery assembly according to any one of claims 19 to 21, characterized in that: The limiting portion is in a mesh shape.

23. The cylindrical battery assembly according to claim 22, characterized in that: The limiting portion is provided with a first groove at the first through hole, for avoiding the liquid injection hole of the cylindrical battery.

24. The cylindrical battery assembly according to any one of claims 19 to 23, characterized in that: The first insulating member is further provided with a plurality of protrusions on a side away from the cylindrical battery, and the plurality of protrusions and the limiting portion form a second accommodating groove, and the second accommodating groove is used to accommodate the corresponding electrical connecting piece.

25. The cylindrical battery assembly according to claim 24, characterized in that: Each of the plurality of protrusions is provided with a second through hole.

26. The cylindrical battery assembly according to any one of claims 19 to 25, characterized in that: The first insulating member has a first surface and a second surface, the first accommodating groove runs through the first surface and the second surface, the limiting portion includes a transition portion and a supporting portion, the transition portion is connected to the first surface, and the supporting portion is used to support the cylindrical battery.

27. The cylindrical battery assembly according to claim 26, characterized in that: There is a gap between the support portion and the second surface.

28. The cylindrical battery assembly according to claim 27, characterized in that: The height of the gap is 0.4 mm to 0.7 mm.

29. The cylindrical battery assembly according to any one of claims 1 to 28, characterized in that: The first insulating member is provided with a first shell and a second shell, the first shell and the second shell form a accommodating space, and are respectively provided with a plurality of first accommodating grooves for accommodating the plurality of cylindrical batteries, each of the plurality of first accommodating grooves faces the end surface of the cylindrical battery, and the first shell and the second shell are respectively provided with a limiting portion at one end of their respective plurality of first accommodating grooves, the limiting portion having the first through hole, and the limiting portion is arranged between the plane where the first end surface is located and the plane where the corresponding electrical connecting piece is located.

30. The cylindrical battery assembly according to claim 29, characterized in that: The first shell and the second shell are provided with a plurality of protrusions on a side away from the cylindrical battery, and the plurality of protrusions and the limiting portion form a second receiving groove, and the second receiving groove is used to receive the corresponding electrical connection sheet.

31. The cylindrical battery assembly according to claim 30, characterized in that: Each of the plurality of protrusions is provided with a second through hole, the first shell is provided with a fourth connection portion at a side of part of the second through hole facing the cylindrical battery, and the second shell is provided with a fifth connection portion for connecting the fourth connection portion.

32. The cylindrical battery assembly according to any one of claims 1 to 28, characterized in that: Each of the at least one electrical connection sheet includes at least two electrical connection sheet units and a sixth connection portion, the at least two electrical connection sheet units are connected by the sixth connection portion, and each of the at least two electrical connection sheet units includes a hollow portion, a first electrical connection portion, and a second electrical connection portion, the hollow portion separating the first electrical connection portion and the second electrical connection portion.

33. The cylindrical battery assembly according to claim 32, characterized in that: The hollow portion has one or more structures of a straight line shape, an I shape, a cross shape, a Z shape, an S shape or an H shape.

34. The cylindrical battery assembly according to claim 32 or 33, characterized in that: The width of the hollow portion is 0.5 mm to 1.5 mm.

35. The cylindrical battery assembly according to any one of claims 32 to 34, characterized in that: The electrical connecting piece has one or more of a first arc-shaped structure, a second arc-shaped structure or a square structure.

36. The cylindrical battery assembly according to claim 35, characterized in that: The electrical connection sheet has the first arc-shaped structure, and the diameter of the first arc-shaped structure is smaller than the diameter of the cylindrical battery.

37. The cylindrical battery assembly according to claim 35 or 36, characterized in that: The electrical connection sheet has the first arc-shaped structure, and a diameter of the first arc-shaped structure is 6 mm to 8 mm smaller than a diameter of the cylindrical battery.

38. The cylindrical battery assembly according to any one of claims 35 to 37, characterized in that: The electrical connection sheet has the square structure, and the sixth connection portion has the square structure.

39. The cylindrical battery assembly according to any one of claims 32 to 38, characterized in that: The electrical connection sheet further includes a sampling portion.

40. The cylindrical battery assembly according to claim 39, characterized in that: The width of the sampling portion is smaller than the width of the sixth connecting portion.

41. The cylindrical battery assembly according to any one of claims 32 to 40, characterized in that: The hollow portion has one or more structures of an I-type, a cross-type or an H-type, and the first electrical connection portion and / or the second electrical connection portion has a bending portion.

42. The cylindrical battery assembly according to any one of claims 32 to 41, characterized in that: The cylindrical battery also includes a first electrode and a second electrode, and the sixth connecting portion includes a series segment and a parallel segment, the series segment is used for electrical connection between the first electrode of one cylindrical battery and the second electrode of another cylindrical battery, and the parallel segment is used for electrical connection between the first electrode of one cylindrical battery and the first electrode of another cylindrical battery, and the width of the series segment is greater than the width of the parallel segment.

43. The cylindrical battery assembly according to claim 42, characterized in that: The ratio of the width of the series section to the width of the parallel section is 1.5 to 7.

44. The cylindrical battery assembly according to any one of claims 1 to 43, characterized in that: The corresponding electrical connection piece on the first insulating member is located in the area where the first insulating member is located.

45. An energy storage power supply, characterized in that: It comprises a shell and a cylindrical battery assembly according to any one of claims 1 to 44, wherein the cylindrical battery assembly is arranged in the shell.

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