Battery monomer, battery device, power utilization device and energy storage device

Abstract

The invention provides a battery monomer, a battery device, a power utilization device and an energy storage device. The battery cell provided by the present disclosure comprises: a housing having an accommodating space, the housing comprising a first housing wall; at least part of the electrode assembly is arranged in the accommodating space, and the electrode assembly comprises a first tab and a second tab which are opposite in polarity; the first electrode terminal and the second electrode terminal are respectively arranged on the first shell wall, the first electrode terminal is electrically connected with the first tab, and the second electrode terminal is electrically connected with the second tab; the insulating part is at least partially arranged between the first electrode terminal and the second electrode terminal; the part, located between the first electrode terminal and the second electrode terminal, of the insulating part exceeds the upper surfaces of the first electrode terminal and the second electrode terminal in the wall thickness direction of the first shell wall and away from the direction of the containing space. Therefore, the battery cell, the battery device, the power utilization device and the energy storage device which can reduce the overlapping risk between the electrode terminals can be provided.

Description

Battery cell, battery device, electric device and energy storage device TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of batteries, in particular to a battery cell, a battery device, an electric device and an energy storage device. BACKGROUND

[0002] With the popularization and promotion of the concept of green development, new energy batteries are increasingly widely used in life and industry. For example, new energy vehicles equipped with batteries have been widely used, and batteries are also increasingly used in the field of energy storage and the like.

[0003] In the existing battery system, the battery usually includes a shell and an electrode terminal arranged in the shell. The electrode terminal can include a positive electrode terminal and a negative electrode terminal. How to reduce the short circuit risk of the positive electrode terminal and the negative electrode terminal is one of the research directions in the industry.

[0004] SUMMARY

[0005] Therefore, the present disclosure aims to provide a battery cell, a battery device, an electric device and an energy storage device capable of reducing the short circuit risk between electrode terminals.

[0006] To achieve the above-mentioned purpose, the present disclosure adopts the following technical solutions.

[0007] The first aspect of the present disclosure provides a battery cell, comprising: a shell having an accommodation space, the shell comprising a first shell wall; an electrode assembly at least partially arranged in the accommodation space, the electrode assembly comprising a first tab and a second tab with opposite polarities; a first electrode terminal and a second electrode terminal arranged in the first shell wall respectively, the first electrode terminal being electrically connected with the first tab, and the second electrode terminal being electrically connected with the second tab; an insulating member at least partially arranged between the first electrode terminal and the second electrode terminal; along the wall thickness direction of the first shell wall and away from the direction of the accommodation space, the part of the insulating member between the first electrode terminal and the second electrode terminal exceeds the upper surfaces of both the first electrode terminal and the second electrode terminal.

[0008] Since the insulating member is arranged between the first electrode terminal and the second electrode terminal, the risk of short circuit of the first electrode terminal and the second electrode terminal can be reduced; even if the first electrode terminal and the second electrode terminal are arranged compactly and close to each other in a long range, short circuit is not likely to occur due to creeping or the like. Moreover, since the first electrode terminal and the second electrode terminal can be arranged compactly on the same housing wall of the housing, the volume utilization of the battery can be improved. In addition, the insulating member extends beyond the upper surfaces of both the first electrode terminal and the second electrode terminal, and the first electrode terminal and the second electrode terminal can be reliably insulated from each other.

[0009] In some embodiments, the first electrode terminal has a first protruding portion protruding from the outer surface of the first housing wall, the second electrode terminal has a second protruding portion protruding from the outer surface of the first housing wall, and a gap is formed between the first protruding portion and the second protruding portion; the insulating member includes an insulating partition wall arranged in the gap to partition the first protruding portion and the second protruding portion, and the insulating partition wall extends beyond the first protruding portion and the second protruding portion along the thickness direction of the first housing wall and away from the accommodation space.

[0010] The insulating partition wall is arranged between the gap formed by the first protruding portion and the second protruding portion, and not only can the risk of short circuit between the first electrode terminal and the second electrode terminal be reduced, but also the first electrode terminal and the second electrode terminal can be arranged compactly. Even if the first electrode terminal and the second electrode terminal are arranged close to each other in a long range, the risk of accidental short circuit can be reduced by the insulation of the two electrode terminals by the insulating partition wall of the corresponding length, and the structure of the insulating member is simple and easy to assemble with the electrode terminals.

[0011] In some embodiments, the insulating member includes an insulating bottom wall and the insulating partition wall; the insulating bottom wall is arranged between at least one of the first protruding portion and the second protruding portion and the first housing wall, and the insulating partition wall is connected to the insulating bottom wall.

[0012] The insulating bottom wall is arranged between at least one of the first protruding portion and the second protruding portion and the first housing wall, and at least one of the first protruding portion and the second protruding portion and the first housing wall can be insulated. The insulating partition wall is connected to the insulating bottom wall, so that one insulating member can be used to insulate the first protruding portion or the second protruding portion from the housing wall and to insulate the first protruding portion and the second protruding portion from each other, which is beneficial to reduce the number of parts, improve assembly efficiency, and reduce production cost.

[0013] In some embodiments, the insulating bottom wall is disposed between the first and second protruding portions and the first housing wall, and the insulating bottom wall is formed as an integral piece with the insulating partition wall.

[0014] The insulating bottom wall is disposed between the first and second protruding portions and the first housing wall, and can insulate the first and second protruding portions from the first housing wall. The insulating bottom wall is formed as an integral piece with the insulating partition wall, and can reduce the number of components and improve assembly efficiency.

[0015] In some embodiments, the insulating member further comprises an insulating side wall connected to the insulating bottom wall and extending along a wall thickness direction of the first housing wall, the insulating side wall being disposed around at least one of the first and second protruding portions, and the insulating partition wall being disposed further away from the first housing wall than the insulating side wall along the wall thickness direction of the first housing wall.

[0016] The insulating side wall is disposed around at least one of the first and second protruding portions, and can not only insulate the first and / or second protruding portion circumferentially and reduce the probability of the first and / or second protruding portion conducting electricity with other components, but also can strengthen the first and / or second protruding portion in a direction perpendicular to the wall thickness direction of the first housing wall (e.g., in a direction along the wall surface of the first housing wall), and reduce the probability of the first and / or second protruding portion being displaced or deformed due to external force. The insulating partition wall is disposed further away from the first housing wall than the insulating side wall, and thus can insulate the first and second electrode terminals together with the insulating side wall, and can save space and simplify the overall structure of the insulating member because the insulating partition wall does not have to be disposed from the insulating bottom wall.

[0017] In some embodiments, the insulating side wall comprises a first side wall portion and a second side wall portion located in the gap, the first side wall portion being disposed proximate to the first protruding portion, and the second side wall portion being disposed proximate to the second protruding portion, and the insulating member further comprises a connecting wall spanning between the first and second side wall portions, and the insulating partition wall is disposed on the connecting wall and extends from the connecting wall along a wall thickness direction of the first housing wall towards a direction away from the first housing wall.

[0018] The first side wall part is arranged close to the first protruding part, and the second side wall part is arranged close to the second protruding part, so that the creepage distance on the surface of the first electrode terminal and the second electrode terminal can be increased, and the insulation reliability can be improved. The first protruding part and the second protruding part are respectively provided with the insulating side wall part, so that the first protruding part and the second protruding part can be circumferentially insulated, the probability of electric conduction between the first protruding part and the second protruding part and other components can be reduced, the strength of the first protruding part and the second protruding part in the direction perpendicular to the wall thickness direction of the first shell wall can be increased, and the probability of deformation of the first protruding part and the second protruding part due to external force can be reduced. In addition, since the insulating isolation wall is arranged on the connecting wall and extends from the connecting wall to the wall thickness direction of the first shell wall in the direction away from the first shell wall, the arrangement space can be saved, and the overall structure of the insulating part can be simplified.

[0019] In some embodiments, the insulating part further comprises an extending wall connected to the end of the insulating side wall away from the insulating bottom wall in the wall thickness direction, and the projection of at least one of the first protruding part and the second protruding part in the same projection plane as the extending wall has an overlapping part.

[0020] The overall structure formed by the extending wall and the insulating side wall can limit the displacement or bending deformation of the first protruding part and / or the second protruding part in the wall thickness direction of the first shell wall; when the first protruding part and the second protruding part both have overlapping parts in the wall thickness direction of the first shell wall, when one electrode terminal is subjected to external force or torque, the insulating part can transmit the force or torque acting on this electrode terminal to the other electrode terminal, and the deformation resistance of the electrode terminal can be further improved.

[0021] In some embodiments, the insulating isolation wall extends in the direction away from the first shell wall along the extending wall.

[0022] In this way, not only can the short circuit risk of the first protruding part and the second protruding part be reduced, but also when the first electrode terminal and the second electrode terminal are arranged compactly, the length of the overlapping part of the first electrode terminal and the second electrode terminal can be increased due to the above arrangement, and the risk of overlap between the busbars on the first electrode terminal and the second electrode terminal can be reduced.

[0023] In some embodiments, the insulating isolation wall has at least one reinforcing rib extending in the wall thickness direction of the first shell wall.

[0024] The insulating isolation wall has at least one reinforcing rib, which can increase the strength of the insulating isolation wall and reduce the risk of deformation of the insulating isolation wall due to external force.

[0025] In some embodiments, the insulating partition wall extends beyond both the first protruding portion and the second protruding portion in a wall thickness direction of the first housing wall and away from the accommodation space, and at least one reinforcing rib is arranged at the extended portion.

[0026] When the extended portion is provided with at least one reinforcing rib, the busbar can be positioned in connection with the electrode terminal through the reinforcing rib, and the positioning accuracy of the busbar is improved.

[0027] In some embodiments, the reinforcing rib is protruded from a surface of the insulating partition wall facing the first electrode terminal and / or the second electrode terminal.

[0028] In this way, the insulating partition wall not only insulates the first electrode terminal and the second electrode terminal from each other and reduces the risk of busbar overlap, but also the reinforcing rib protruded from the insulating partition wall can increase the strength of the insulating partition wall, improve the positioning accuracy of the busbar, and reduce the number of components and the cost.

[0029] In some embodiments, the first protruding portion comprises a first main body portion and a first extension portion connected to each other, the second protruding portion comprises a second main body portion and a second extension portion connected to each other, the gap comprises a first gap formed between the first extension portion and the second extension portion, and the insulating partition wall is arranged at least in the first gap.

[0030] The protruding portion comprising the main body portion and the extension portion can increase the contact area of the terminal plate with air, thereby increasing the contact area of the electrode terminal with air, increasing the heat dissipation area, and improving the heat dissipation performance of the electrode terminal, further improving the use performance of the battery cell. The insulating partition wall arranged at least in the first gap can reduce the risk of short circuit of the first extension portion and the second extension portion, and can increase the length of the overlapping portion of the first extension portion and the second extension portion.

[0031] In some embodiments, a second gap is further formed between the first main body portion and the second extension portion, and the insulating partition wall is arranged in the first gap and the second gap.

[0032] The risk of short circuit of the first main body portion and the second extension portion can be reduced, and the length of the overlapping portion of the first main body portion and the second extension portion can be increased.

[0033] In some embodiments, the first main body portion has a first protruding portion protruding along a first direction, the second extending portion has a first stepped portion formed by being partially recessed along the wall thickness direction; along the wall thickness direction, the first protruding portion covers a portion of the first stepped portion from a side away from the first housing wall; and along the first direction, a first gap exists between the first protruding portion and a first stepped surface of the first stepped portion that is perpendicular to the first direction, wherein the first direction is perpendicular to the wall thickness direction and coincides with the extending directions of the first extending portion and the second extending portion; the first gap constitutes at least a portion of the second gap.

[0034] Thus, the cooperation of the first protruding portion and the first stepped portion can limit the bending deformation of the second electrode terminal, and the first protruding portion covers a portion of the first stepped portion, which not only can reduce the space occupied by the first protruding portion, but also can improve the space utilization. By arranging the insulating isolation wall at the first gap, the creepage distance on the surfaces of the first electrode terminal and the second electrode terminal can be increased, and the insulation reliability can be improved.

[0035] In some embodiments, a third gap is further formed between the second main body portion and the first extending portion, and the insulating isolation wall is arranged in the first gap, the second gap, and the third gap.

[0036] The insulating isolation wall is arranged at the gap between the first protruding portion and the second protruding portion, which reduces the risk of short circuit between the electrode terminals and facilitates increasing the size of the overlapping portion of the first protruding portion and the second protruding portion.

[0037] In some embodiments, the second main body portion has a second protruding portion protruding along a first direction, the first extending portion has a second stepped portion formed by being partially recessed along the wall thickness direction; along the wall thickness direction, the second protruding portion covers a portion of the second stepped portion from a side away from the first housing wall; and along the first direction, a second gap exists between the second protruding portion and a second stepped surface of the second stepped portion that is perpendicular to the first direction, the second gap constitutes at least a portion of the third gap.

[0038] Thus, the cooperation of the second protruding portion and the second stepped portion can limit the bending deformation of the first electrode terminal, and further covering a portion of the second stepped portion by the second protruding portion not only can reduce the space occupied by the second protruding portion, but also can improve the space utilization. By arranging the insulating isolation wall at the second gap, the creepage distance on the surfaces of the first electrode terminal and the second electrode terminal can be increased, and the insulation reliability can be improved.

[0039] In some embodiments, the first slit extends along a first direction, the second slit and the third slit extend along a second direction, the first direction and the second direction are perpendicular to each other and both are perpendicular to the wall thickness direction, and the insulating isolation wall is located in the first slit, the second slit, and the third slit and is formed as an integral piece.

[0040] In this way, the bending strength of the region of the first shell wall where the electrode terminals are arranged can be improved by the synergy of the two electrode terminals. Moreover, the first electrode terminal assembly and the second electrode terminal can be arranged as compactly as possible, which is conducive to the use of the non-electrode terminal arrangement region of the first shell wall, and further conducive to improving the volume utilization rate of the battery pack. The first slit, the second slit, and the third slit all have the arrangement of the insulating isolation wall, which can reduce the risk of short circuit between the electrode terminals and is conducive to increasing the size of the overlapping portion. The insulating isolation wall located in the first slit, the second slit, and the third slit is formed as an integral piece, which is conducive to reducing the number of components, speeding up the assembly, and reducing the cost.

[0041] A second aspect of the present disclosure provides a battery device, the battery device comprising the battery cell of the first aspect.

[0042] In this way, the risk of short circuit in the battery device can be reduced.

[0043] In some embodiments, the plurality of battery cells are arranged relative to each other; a busbar assembly electrically connects the battery cells adjacent along the arrangement direction of the battery cells, the busbar assembly comprises a first busbar and a second busbar, in the same battery cell, along the wall thickness direction of the first shell wall, the first busbar is arranged on the side of the first electrode terminal away from the first shell wall, the second busbar is arranged on the side of the second electrode terminal away from the first shell wall, and along the wall thickness direction of the first shell wall and away from the direction of the accommodation space, the insulating member exceeds the surfaces of the first electrode terminal and the second electrode terminal away from the first shell wall.

[0044] In this way, when a plurality of battery cells are connected by busbars, the risk of short circuit between the busbars can be reduced.

[0045] In some embodiments, along the wall thickness direction of the first shell wall and away from the direction of the accommodation space, the insulating member exceeds the surfaces of the first busbar and the second busbar away from the first shell wall.

[0046] In this way, when a plurality of battery cells are connected by busbars, the risk of short circuit between the busbars can be further reduced.

[0047] In some embodiments, the insulating member comprises an insulating partition wall, the insulating partition wall is partially located between the first bus member and the second bus member, and the first bus member and the second bus member respectively abut against the insulating partition wall.

[0048] The first bus member and the second bus member are insulated by the insulating partition wall, thereby reducing the risk of short circuit between the bus members.

[0049] In some embodiments, the insulating partition wall is provided with a first reinforcing rib on a side facing the first bus member, and a second reinforcing rib on a side facing the second bus member, and the first bus member is provided with a first recess, and the second bus member is provided with a second recess, the first recess is matched with the first reinforcing rib, and the second recess is matched with the second reinforcing rib.

[0050] When a plurality of battery cells are connected by bus members, the bus members can be positioned by matching the recesses and the reinforcing ribs, thereby improving the positioning accuracy of the bus members, and the first reinforcing rib and the second reinforcing rib can also improve the strength of the insulating partition wall.

[0051] In some embodiments, the first reinforcing rib and the second reinforcing rib are arranged at intervals.

[0052] In this way, the strength of the insulating partition wall can be further increased, and the positioning accuracy of the bus members can be further improved.

[0053] In some embodiments, the battery device comprises a box body, each of the battery cells is accommodated in the box body, at least one box wall of the box body has a boss, the boss forms an accommodation portion on a side facing the battery cells, and at least part of the first electrode terminal, the second electrode terminal, the bus member assembly, and the insulating member is accommodated in the accommodation portion.

[0054] In this way, the height of the box body at the positions of the first electrode terminal, the second electrode terminal, and the bus member can be increased, thereby reducing the size of the battery device and also facilitating the improvement of the volume utilization rate of the battery device.

[0055] A third aspect of the present disclosure provides a power utilization device. The power utilization device comprises the battery cell provided in the first aspect or the battery device provided in the second aspect, and the battery cell or the battery device is used to store or provide electric energy.

[0056] In this way, the risk of short circuit of the first electrode terminal and the second electrode terminal in the power utilization device can be reduced, and the risk of overlap between the bus members on the first electrode terminal and the second electrode terminal can also be reduced.

[0057] A fourth aspect of the present disclosure provides a power storage device. The power storage device comprises the battery cell provided in the first aspect or the battery device provided in the second aspect, and the battery cell or the battery device is used for storing or providing electric energy.

[0058] Therefore, the risk of short circuit of the first electrode terminal and the second electrode terminal in the power storage device can be reduced, and the risk of the overlap between the busbars on the first electrode terminal and the second electrode terminal can also be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0059] FIG. 1 is a structural schematic diagram of a vehicle provided in an embodiment of the present disclosure;

[0060] FIG. 2 is a structural schematic diagram of a power storage device provided in an embodiment of the present disclosure;

[0061] FIG. 3 is a perspective exploded schematic diagram of a battery device provided in an embodiment of the present disclosure;

[0062] FIG. 4 is a perspective exploded schematic diagram of a battery cell provided in an embodiment of the present disclosure;

[0063] FIG. 5 is a perspective schematic diagram of the internal structure of a battery device provided in an embodiment of the present disclosure;

[0064] FIG. 6 is a side view of the internal structure of a battery device provided in an embodiment of the present disclosure;

[0065] FIG. 7 is a schematic diagram of the A-A cross section of FIG. 6 provided in an embodiment of the present disclosure;

[0066] FIG. 8 is a partial enlarged schematic diagram of the B region of FIG. 7 provided in an embodiment of the present disclosure;

[0067] FIG. 9 is a top view of a first shell wall provided in an embodiment of the present disclosure;

[0068] FIG. 10 is a partial enlarged schematic diagram of the C region of FIG. 9 provided in an embodiment of the present disclosure;

[0069] FIG. 11 is a schematic diagram of the D-D cross section of FIG. 9 provided in an embodiment of the present disclosure;

[0070] FIG. 12 is a partial enlarged schematic diagram of the D1 region of FIG. 11 provided in an embodiment of the present disclosure;

[0071] FIG. 13 is a schematic diagram of the E-E cross section of FIG. 9 provided in an embodiment of the present disclosure;

[0072] FIG. 14 is a partial enlarged schematic diagram of the E1 region of FIG. 13 provided in an embodiment of the present disclosure;

[0073] FIG. 15 is a perspective schematic diagram of a first shell wall provided in another embodiment of the present disclosure;

[0074] Fig. 16 is a schematic view of the F-F cross section of Fig. 15 according to an embodiment of the present disclosure;

[0075] Fig. 17 is a schematic view of the G-G cross section of Fig. 15 according to an embodiment of the present disclosure;

[0076] Fig. 18 is a schematic view of a first housing wall according to another embodiment of the present disclosure;

[0077] Fig. 19 is a schematic view of a first housing wall according to a further embodiment of the present disclosure;

[0078] Fig. 20 is a schematic view of a first housing wall according to an embodiment of the present disclosure;

[0079] Fig. 21 is a schematic view of a battery device with a boss according to an embodiment of the present disclosure.

[0080] Legend of reference signs

[0081] 1000 vehicle; 2000 energy storage device; 100 battery device; 200 controller; 300 motor; 400 master control module; 10 battery cell; 20 box; 20A first box; 20B second box; 1 housing; 11 first housing wall; 12 accommodation space; 13 first electrode terminal; 131 first protrusion; 1311 first body portion; 1312 first extension; 13111 first extension portion; 13121 second step portion; 14 second electrode terminal; 141 second protrusion; 1411 second body portion; 1412 second extension; 14111 second extension portion; 14121 first step portion; 15 insulation; 151 insulation partition wall; 1511 reinforcing rib; 15111 first reinforcing rib; 15112 second reinforcing rib; 152 insulation bottom wall; 153 insulation side wall; 1531 first side wall portion; 1532 second side wall portion; 154 connecting wall; 155 extension wall; 16 gap; 161 first gap; 162 second gap; 163 third gap; 2 electrode assembly; 21 first tab; 22 second tab; 3 busbar; 31 first busbar; 311 first end edge; 3111 first recess; 32 second busbar; 321 second end edge; 3211 second recess; 111a boss; 111b accommodation portion; X wall thickness direction; Y first direction; Z second direction. DETAILED DESCRIPTION

[0082] It should be noted that the embodiments and technical features in the present disclosure can be combined with each other without conflict, and the detailed description in the specific embodiments should be understood as an explanation of the purpose of the present disclosure, and should not be regarded as an improper limitation of the present disclosure.

[0083] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure; the use of the terms "including," "comprising," "having" and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items.

[0084] In the description of the disclosure, the technical terms "first", "second", "third", "fourth" and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the disclosure, the meaning of "a plurality of" is more than two, unless otherwise explicitly and specifically limited.

[0085] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the disclosure. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0086] In the description of the disclosure, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0087] In the description of the embodiments of the disclosure, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the disclosure and simplifying the description, and is not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed in a particular orientation, be operated or used, and therefore cannot be understood as a limitation on the embodiments of the disclosure.

[0088] In the description of the disclosure, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanical connection, or it can be electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the disclosure can be understood according to the specific circumstances.

[0089] In the description of the present disclosure, unless explicitly defined and limited otherwise, the technical term "contact" should be interpreted broadly, which can be direct contact or contact through an intermediate medium layer, which can be contact between two objects in contact without interaction force or contact between two objects in contact with interaction force.

[0090] In the description of the embodiments of the present disclosure, unless explicitly defined and limited otherwise, the technical terms "parallel" and "perpendicular" allow a certain degree of tolerance and / or error, including approximately parallel and approximately perpendicular.

[0091] Next, the present disclosure will be described in detail.

[0092] With the popularization and promotion of the concept of green development, new energy batteries are increasingly widely used in life and industry. For example, new energy vehicles equipped with batteries have been widely used, and batteries are also increasingly used in energy storage fields and the like.

[0093] In the existing battery system, the battery generally includes a shell and an electrode terminal arranged on the shell. The electrode terminal can include a positive electrode terminal and a negative electrode terminal. In the prior art, the shell of the battery monomer has the tendency to be insufficient in strength and prone to bending deformation. In order to improve the strength of the shell of the battery monomer, the electrode terminals are arranged compactly. However, when the electrode terminals of different polarities are arranged compactly, they are prone to short circuit. Therefore, how to reduce the short circuit risk between the positive electrode terminal and the negative electrode terminal is one of the research directions in the industry.

[0094] Through research, an insulating piece can be added between the positive electrode terminal and the negative electrode terminal, thereby reducing the short circuit risk between the electrode terminals.

[0095] Based on such a design concept, the inventors of the present disclosure designed a battery monomer, which includes a shell having an accommodation space, the shell including a first shell wall; an electrode assembly at least partially arranged in the accommodation space, the electrode assembly including first and second tabs of opposite polarities; first and second electrode terminals respectively arranged on the first shell wall, the first electrode terminal being electrically connected to the first tab, and the second electrode terminal being electrically connected to the second tab; and an insulating piece at least partially arranged between the first and second electrode terminals. Along the wall thickness direction of the first shell wall and away from the direction of the accommodation space, the part of the insulating piece between the first and second electrode terminals exceeds the upper surfaces of both the first and second electrode terminals.

[0096] The insulating part is arranged between the first electrode terminal and the second electrode terminal, which not only reduces the risk of short circuit of the first electrode terminal and the second electrode terminal, but also increases the length of the overlapping part of the first electrode terminal and the second electrode terminal when the first electrode terminal and the second electrode terminal are arranged compactly, thereby improving the volume utilization rate of the battery. In addition, the insulating part protrudes above the upper surfaces of the first electrode terminal and the second electrode terminal, which can improve the insulation reliability between the first electrode terminal and the second electrode terminal. In the embodiment of the present disclosure, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging.

[0097] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc. The present disclosure is not limited thereto.

[0098] The technical solutions described in the embodiments of the present application are applicable to various electric devices using battery cells or battery devices, such as mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc.

[0099] The technical solutions described in the embodiments of the present application are also applicable to energy storage devices. The energy storage device can be used in energy storage power stations, wind power systems, solar power systems, mobile power systems or temporary power supply systems, etc. The energy storage device can store electrical energy as needed and output electrical energy at appropriate times. For example, the energy storage device can store electrical energy during the low electricity consumption period, and provide electrical energy for related users or electrical equipment during the peak electricity consumption period. The energy storage system provided in the embodiments of the present application can be any power system that needs to use an energy storage device.

[0100] For convenience of description, the electric device of an embodiment of the present disclosure is taken as a vehicle 1000 for example. The following will be described with reference to the accompanying drawings.

[0101] FIG. 1 is a structural schematic diagram of a vehicle according to an embodiment of the present disclosure. The vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle, which can be a pure electric vehicle, a hybrid vehicle, or a range extended vehicle, etc. As shown in FIG. 1, the vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom, head, or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as an operating power source of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, the controller 200 being used to control the battery device 100 to supply power to the motor 300, for example, for the working power demand of the vehicle 1000 during starting, navigation, and driving.

[0102] In some embodiments of the present disclosure, the battery device 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1000.

[0103] FIG. 2 is a structural schematic diagram of an energy storage device 2000 according to an embodiment of the present disclosure. The energy storage device 2000 includes one or more battery clusters to improve the voltage and capacity of the energy storage device. The battery cluster can include a plurality of battery devices, and the plurality of battery devices are connected in series through a busbar component to improve the voltage of the energy storage device. When the energy storage device includes a plurality of battery clusters, the plurality of battery clusters are connected in parallel to improve the capacity of the energy storage device.

[0104] In some embodiments, the energy storage device 2000 is an energy storage container or an energy storage cabinet.

[0105] In some embodiments, the energy storage device can include a cabinet body and one or more battery clusters, and the battery clusters are accommodated in the cabinet body.

[0106] In some embodiments, the energy storage device can include a thermal management module, a master control module, a general control module 400, a power distribution module, and a fire-fighting module, etc.

[0107] FIG. 3 is a perspective exploded schematic diagram of a battery device according to an embodiment of the present disclosure. As shown in FIG. 3, the battery device 100 includes a box body 20, which can include a first box body 20A and a second box body 20B. The first box body 20A and the second box body 20B are buckled to form a closed space inside the box body 20 to accommodate a battery cell assembly. Here, the closed refers to covering or closing, which can be sealed or unsealed. The first box body 20A can be a top cover or a bottom plate.

[0108] As an example, the box body can include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected with the frame, so that a closed space is formed inside the box body to accommodate the battery cell assembly.

[0109] As an example, the box can be part of a chassis structure of a vehicle. For example, the top cover of the box can be at least part of a floor of the vehicle, or the frame of the box can be at least part of a cross beam and a longitudinal beam of the vehicle.

[0110] The battery apparatus mentioned in embodiments of the present disclosure can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells connected in series, in parallel, or in a mixed connection through a busbar (not shown in FIG. 3).

[0111] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells.

[0112] As an example, the battery cell assembly can be a battery module formed by arranging and fixing a plurality of battery cells into one independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0113] In some embodiments, the battery apparatus can be a battery pack including a box and one or more battery cell assemblies accommodated in the box.

[0114] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the box by fixing the battery module in the box.

[0115] As an example, the battery cell assembly can also be accommodated in the box by directly fixing a plurality of battery cells in the box.

[0116] Hereinafter, some embodiments of the present disclosure will be described in detail with reference to FIGS. 4 to 21.

[0117] FIG. 4 is a perspective exploded view of the battery cell 10 according to an embodiment of the present disclosure; FIG. 5 is a perspective view of the internal structure of the battery device 100 according to an embodiment of the present disclosure; FIG. 6 is a side view of the internal structure of the battery device 100 according to an embodiment of the present disclosure; FIG. 7 is a cross-sectional view of A-A of FIG. 6 according to an embodiment of the present disclosure; FIG. 8 is a partial enlarged view of a region B of FIG. 7 according to an embodiment of the present disclosure; FIG. 9 is a top view of the first housing wall 11 according to an embodiment of the present disclosure; FIG. 10 is a partial enlarged view of a region C of FIG. 9 according to an embodiment of the present disclosure; FIG. 11 is a cross-sectional view of D-D of FIG. 9 according to an embodiment of the present disclosure; FIG. 12 is a partial enlarged view of a region D1 of FIG. 11 according to an embodiment of the present disclosure; FIG. 13 is a cross-sectional view of E-E of FIG. 9 according to an embodiment of the present disclosure; FIG. 14 is a partial enlarged view of a region E1 of FIG. 13 according to an embodiment of the present disclosure; FIG. 15 is a perspective view of the first housing wall 11 according to another embodiment of the present disclosure; FIG. 16 is a cross-sectional view of F-F of FIG. 15 according to an embodiment of the present disclosure; FIG. 17 is a cross-sectional view of G-G of FIG. 15 according to an embodiment of the present disclosure; FIG. 18 is a perspective view of the first housing wall 11 according to yet another embodiment of the present disclosure; FIG. 19 is a perspective view of the first housing wall 11 according to still another embodiment of the present disclosure; FIG. 20 is a perspective exploded view of the first housing wall 11 according to an embodiment of the present disclosure; and FIG. 21 is a cross-sectional view of the battery device 100 with a boss according to an embodiment of the present disclosure.

[0118] In the description of the embodiments of the present disclosure, the direction in which the arrow X is located represents the "wall thickness direction X of the first housing wall 11", the "height direction of the battery cell 10", the direction in which the arrow Y is located represents the "length direction of the first housing wall 11", the "length direction of the battery cell 10", the "first direction Y", and the direction in which the arrow Z is located represents the "width direction of the first housing wall 11", the "thickness direction of the battery cell 10", the "second direction Z".

[0119] A first aspect of the present disclosure provides a battery cell 10. The battery cell 10 includes: a housing 1 having an accommodation space 12, the housing 1 including a first housing wall 11; an electrode assembly 2 at least partially disposed in the accommodation space 12, the electrode assembly 2 including first and second polar tabs 21 and 22 of opposite polarity; first and second electrode terminals 13 and 14 respectively disposed on the first housing wall 11, the first electrode terminal 13 being electrically connected to the first polar tab 21, and the second electrode terminal 14 being electrically connected to the second polar tab 22; an insulating member 15 at least partially disposed between the first and second electrode terminals 13 and 14; and the insulating member 15 being located beyond the upper surfaces of both the first and second electrode terminals 13 and 14 in the portion between the first and second electrode terminals 13 and 14 along the wall thickness direction X of the first housing wall 11 and away from the accommodation space 12.

[0120] In the embodiments of the present disclosure, for the convenience of description, the plane on the first electrode terminal 13 for welding the bus member is referred to as the upper surface of the first electrode terminal 13, and the plane on the second electrode terminal 14 for welding the bus member is referred to as the upper surface of the second electrode terminal 14.

[0121] As shown in FIG. 4, the battery cell 10 includes a housing 1 having a plurality of housing walls, for the convenience of description, one of the housing walls is named as the first housing wall 11. The battery cell 10 further includes an electrode assembly 2 located in an accommodation space 12 surrounded by the plurality of housing walls.

[0122] In some embodiments, as shown in FIG. 4, the battery cell 10 includes an electrode assembly 2. The electrode assembly 2 includes a positive electrode sheet, a negative electrode sheet, and a separator. During the charging and discharging process of the battery cell 10, active ions (e.g., lithium ions) are embedded and extracted between the positive and negative electrodes. The separator is arranged between the positive and negative electrode sheets, which can prevent the short circuit of the positive and negative electrodes, and at the same time allow the active ions to pass through. In the embodiment shown in FIG. 4, as the electrode assembly 2, two laminated jelly rolls formed by laminating and winding the positive electrode sheet, the negative electrode sheet, and the separator are shown, but the electrode assembly 2 is not limited to the winding structure shown in FIG. 4, for example, it can also be a laminated structure or other structure forms.

[0123] The electrode assembly 2 includes first and second tabs 21 and 22 of opposite polarity, which can conduct current out of the electrode assembly 2. One of the first and second tabs 21 and 22 can be a positive tab, and the other can be a negative tab. In the specific embodiment shown in FIG. 4, the first and second tabs 21 and 22 are shown disposed on one side of the electrode assembly 2 in the thickness direction X and proximate one end of the electrode assembly 2 in the first direction Y. Of course, the first and second tabs 21 and 22 can also be disposed on both ends of the electrode assembly 2, and / or proximate the other end of the electrode assembly 2 in the first direction Y.

[0124] In some embodiments, the battery cell 10 includes a housing 1. The housing 1 can be a steel case, an aluminum case, a plastic case (e.g., polypropylene), a composite metal case (e.g., copper-aluminum composite case), or an aluminum-plastic film, etc. In some embodiments, the housing can be a sealed structure, or a non-sealed structure. As an example, when the housing is a non-sealed structure, the housing serves to protect the electrode assembly, and a sealing bag is further included between the housing and the electrode assembly, which is used to encapsulate the electrode assembly and electrolyte, etc. Specifically, the sealing bag can be a bag-shaped insulating member or an aluminum-plastic film. When the housing is a sealed structure, it is used to encapsulate the electrode assembly, electrolyte, etc.

[0125] As an example, the battery cell 10 can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or other shapes of battery cells, including a square battery cell, a blade battery cell, a multi-prismatic battery cell (e.g., a hexagonal battery cell), etc. In the embodiments shown in FIGS. 4-21, a square battery cell is used as an example for illustration. In some embodiments, as shown in FIG. 4, the housing 1 includes a plurality of case walls, a portion of which enclose a space with an opening, which can be closed by another case wall (e.g., the first case wall 11) to form a receiving space 12 for receiving the electrode assembly 2 and electrolyte, etc. The housing 1 can have one or more openings. The case wall (e.g., the first case wall 11) that closes the opening can also be configured as a top cover.

[0126] As shown in FIGS. 4-20, the battery cell 10 further includes first and second electrode terminals 13 and 14 disposed on the first case wall 11, which are electrically connected to the first and second tabs 21 and 22, respectively, to conduct current into or out of the electrode assembly 2.

[0127] In some embodiments, the electrode terminals can be directly connected to the tabs, or indirectly connected to the tabs via a current collecting member. For ease of illustration, in the embodiments of the present disclosure, the case wall on which the electrode terminals are disposed is referred to as the first case wall 11.

[0128] Optionally, the electrode terminal can be two, three or four, etc., including electrode terminals with opposite polarity. When the electrode terminal is two, the polarity of the two electrode terminals can be opposite. Two electrode terminals can be one negative and the other positive. The electrode terminal can be located at the center of the first shell wall 11, or at one end of the first shell wall 11 along the first direction Y, or at one end of the first shell wall 11 along the second direction Z. The specific location of the electrode terminal on the first shell wall 11 is not limited, as long as it can realize the electrical connection between the electrode terminal and the tab. In a specific embodiment, as shown in FIG. 4, the electrode terminal is located at one end of the first shell wall 11 along the first direction Y.

[0129] Optionally, the electrode terminal can be a cuboid, a triangular prism, an "L" shape or other irregular shape, etc. The shapes of the first electrode terminal 13 and the second electrode terminal 14 can be the same or different.

[0130] As shown in FIGS. 4-20, the battery monomer 10 further comprises an insulating piece 15, which is at least partially disposed between the first electrode terminal 13 and the second electrode terminal 14, and the insulating piece 15 is used to insulate the first electrode terminal 13 and the second electrode terminal 14 from each other.

[0131] In some embodiments, as shown in FIGS. 4, 15, 18 and 19, the first electrode terminal 13 and the second electrode terminal 14 have overlapping portions in the direction perpendicular to the wall thickness direction X, and part of the structure of the insulating piece 15 can be disposed between the overlapping portions of the first electrode terminal 13 and the second electrode terminal 14. Taking the embodiment shown in FIG. 4 as an example, part of the insulating piece 15 can be disposed between the overlapping portions of the first electrode terminal 13 and the second electrode terminal 14 along the first direction Y; part of the insulating piece 15 can also be disposed between the overlapping portions of the first electrode terminal 13 and the second electrode terminal 14 along the second direction Z; part of the insulating piece 15 can also be disposed between the overlapping portions of the first electrode terminal 13 and the second electrode terminal 14 along the first direction Y and between the overlapping portions of the first electrode terminal 13 and the second electrode terminal 14 along the second direction Z.

[0132] In some embodiments, as shown in FIGS. 9, 11, 12, 13 and 14, the first electrode terminal 13 and the second electrode terminal 14 have overlapping portions along the wall thickness direction X, and part of the insulating piece 15 can also be disposed between the overlapping portions of the first electrode terminal 13 and the second electrode terminal 14 along the wall thickness direction X.

[0133] Optionally, the insulating member 15 arranged between the first electrode terminal 13 and the second electrode terminal 14 can be directly connected with the first housing wall 11, or part of the structure of the insulating member 15 can be arranged between the electrode terminals and the first housing wall 11, and this part is connected with the part of the insulating member 15 arranged between the first electrode terminal 13 and the second electrode terminal 14, or the insulating member 15 can be an integral member.

[0134] In the wall thickness direction X of the first housing wall 11, the surface (for example, the upper surface shown in FIG. 4) of the part of the insulating member 15 arranged between the first electrode terminal 13 and the second electrode terminal 14 on the side away from the accommodation space 12 exceeds the upper surfaces (for example, the upper surfaces shown in FIG. 4) of both the first electrode terminal 13 and the second electrode terminal 14. Further, in the wall thickness direction X of the first housing wall 11, the surface (for example, the upper surface shown in FIG. 5) of the part of the insulating member 15 arranged between the first electrode terminal 13 and the second electrode terminal 14 on the side away from the accommodation space 12 exceeds the surface (for example, the upper surface shown in FIG. 5) of the bus member 3 on the side away from the accommodation space 12.

[0135] In some embodiments, the distance between the surface (for example, the upper surface shown in FIG. 5) of the insulating member 15 on the side away from the accommodation space 12 and the upper surface (for example, the upper surface shown in FIG. 4) of either the first electrode terminal 13 or the second electrode terminal 14 in the wall thickness direction X is within the range of 0.2 mm to 10 mm. Optionally, the distance between the surface (for example, the upper surface shown in FIG. 5) of the insulating member 15 on the side away from the accommodation space 12 and the upper surface (for example, the upper surface shown in FIG. 4) of either the first electrode terminal 13 or the second electrode terminal 14 in the wall thickness direction X can be 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 8.5 mm, 9 mm, 9.5 mm, or 10 mm, etc., and of course can also be other values within the above range.

[0136] Since the insulating member 15 is arranged between the first electrode terminal 13 and the second electrode terminal 14, the risk of short circuit of the first electrode terminal 13 and the second electrode terminal 14 can be reduced; even if the first electrode terminal and the second electrode terminal are arranged compactly and thus close to each other over a long range, short circuit is not likely to occur due to creeping or the like. Moreover, since the first electrode terminal and the second electrode terminal can be arranged compactly on the same housing wall of the housing, the volume utilization rate of the battery can be improved. In addition, the insulating member exceeds the upper surfaces of both the first electrode terminal and the second electrode terminal, and thus the insulation reliability between the first electrode terminal and the second electrode terminal can be improved.

[0137] In some embodiments, as shown in FIGS. 4-20, the first electrode terminal 13 has a first protruding portion 131 protruding out of the outer surface of the first housing wall 11, the second electrode terminal 14 has a second protruding portion 141 protruding out of the outer surface of the first housing wall 11, and a gap 16 is formed between the first protruding portion 131 and the second protruding portion 141; the insulating member 15 includes an insulating partition wall 151, which is arranged in the gap 16 to insulate the first protruding portion 131 from the second protruding portion 141, and which extends beyond the first protruding portion 131 and the second protruding portion 141 in the wall thickness direction X of the first housing wall 11 and away from the accommodation space 12.

[0138] The first protruding portion 131 refers to the portion of the first electrode terminal 13 that extends beyond the first housing wall 11 in the wall thickness direction X of the first housing wall 11 and is located outside the outer shell 1, and the second protruding portion 141 refers to the portion of the second electrode terminal 14 that extends beyond the first housing wall 11 in the wall thickness direction X of the first housing wall 11 and is located outside the outer shell 1. In the wall thickness direction X of the first housing wall 11, the gap 16 formed by the first protruding portion 131 and the second protruding portion 141 can be linear (e.g., as shown in FIGS. 15 or 18), "L"-shaped (e.g., as shown in FIG. 19), "Z"-shaped (e.g., as shown in FIG. 4), curved, or of another shape, and the insulating partition wall 151 is arranged in the gap 16.

[0139] Optionally, the first protruding portion 131 can be a cuboid, a triangular prism, "L"-shaped, or of another irregular shape. The second protruding portion 141 can be a cuboid, a triangular prism, "L"-shaped, or of another irregular shape. The first protruding portion 131 and the second protruding portion 141 can be of the same shape or of different shapes.

[0140] Optionally, in the wall thickness direction X of the first housing wall, when the insulating partition wall 151 and the gap 16 extend in the same direction, the insulating partition wall 151 can extend longer than, shorter than, or substantially the same length as the gap 16 in the same direction.

[0141] In the wall thickness direction X of the first housing wall 11, the surface (e.g., the upper surface shown in FIG. 4) of the insulating partition wall 151 on the side away from the accommodation space 12 extends beyond the upper surfaces (e.g., the upper surfaces shown in FIG. 4) of both the first protruding portion 131 and the second protruding portion 141. Further, in the wall thickness direction X of the first housing wall 11, the surface (e.g., the upper surface shown in FIG. 5) of the insulating partition wall 151 on the side away from the accommodation space 12 extends beyond the surface (e.g., the upper surface shown in FIG. 5) of the busbar 3 on the side away from the accommodation space 12.

[0142] The insulation isolation wall 151 is arranged between the gap 16 formed by the first protruding part 131 and the second protruding part 141, which can not only reduce the risk of short circuit between the first electrode terminal and the second electrode terminal, but also compactly arrange the first electrode terminal and the second electrode terminal. Even if the first electrode terminal and the second electrode terminal are arranged close to each other in a long range, the risk of accidental short circuit can be reduced by the insulation isolation wall of the corresponding length to isolate the two electrode terminals, and the structure of the insulation part is simple and easy to assemble with the electrode terminal.

[0143] In some embodiments, as shown in FIG. 16, the insulation part 15 includes an insulation bottom wall 152 and an insulation isolation wall 151: the insulation bottom wall 152 is arranged between at least one of the first protruding part 131 and the second protruding part 141 and the first shell wall 11, and the insulation isolation wall 151 is connected with the insulation bottom wall 152.

[0144] The insulation bottom wall 152 is arranged between at least one of the first protruding part 131 and the second protruding part 141 and the first shell wall 11, and at least one of the first protruding part 131 and the second protruding part 141 is insulated from the first shell wall 11.

[0145] Optionally, the insulation bottom wall 152 can be located between the first protruding part 131 and the first shell wall 11 to insulate the first protruding part 131 and the first shell wall 11 from each other, and no insulation part 15 can be arranged between the second protruding part 141 and the first shell wall 11, at this time, the second protruding part 141 is electrically the same as the shell 1, which can be positively charged or negatively charged, and another insulation part can be additionally arranged between the second protruding part 141 and the first shell wall 11; the insulation bottom wall 152 can be located between the first protruding part 131 and the first shell wall 11 and between the second protruding part 141 and the first shell wall 11, and the insulation bottom wall 152 insulates the first protruding part 131 and the second protruding part 141 from the first shell wall 11; the insulation bottom wall 152 can be located only between the second protruding part 141 and the first shell wall 11, which is not described here.

[0146] In the process of assembling the battery monomer, the electrode assembly and the insulation part can be assembled separately or integrally.

[0147] The insulation bottom wall 152 is arranged between at least one of the first protruding part 131 and the second protruding part 141 and the first shell wall 11, which can insulate at least one of the first protruding part 131 and the second protruding part 141 from the first shell wall 11. The insulation isolation wall 151 is connected with the insulation bottom wall 152, so that one insulation part 15 can be used to insulate the first protruding part 131 or the second protruding part 141 from the shell wall, and to insulate the first protruding part 131 and the second protruding part 141 from each other, which is beneficial to reduce the number of parts, improve the assembly efficiency, and reduce the production cost.

[0148] In some embodiments, as shown in FIG. 20, the insulating bottom wall 152 is arranged between the first and second protruding portions 131 and 141 and the first housing wall 11, and the insulating bottom wall 152 is formed as an integral part with the insulating partition wall 151. The insulating bottom wall 152 insulates both the first and second protruding portions 131 and 141 from the first housing wall 11.

[0149] In the wall thickness direction X, a portion of the insulating bottom wall 152 is located between the first protruding portion 131 and the first housing wall 11, and another portion of the insulating bottom wall 152 is located between the second protruding portion 141 and the first housing wall 11.

[0150] The insulating bottom wall 152 is arranged between the first and second protruding portions 131 and 141 and the first housing wall 11, and can insulate both the first and second protruding portions 131 and 141 from the first housing wall 11. The insulating bottom wall 152 is formed as an integral part with the insulating partition wall 151, and can reduce the number of components and improve assembly efficiency.

[0151] In some embodiments, as shown in FIG. 8 or FIG. 17, the insulating member 15 further comprises an insulating side wall 153 connected to the insulating bottom wall 152 and extending along the wall thickness direction X of the first housing wall 11, and the insulating side wall 153 is arranged around at least one of the first and second protruding portions 131 and 141. In the wall thickness direction X of the first housing wall 11, the insulating partition wall 151 is arranged further away from the first housing wall 11 than the insulating side wall 153. The insulating side wall 153 is used to insulate part of the first protruding portion 131 or part of the second protruding portion 141 from external structures.

[0152] Optionally, the insulating side wall 153 can be provided only around the first protruding portion 131, and the insulating partition wall 151 can be provided at a position further away from the first housing wall 11 than the insulating side wall 153 in the wall thickness direction X of the first housing wall 11. The insulating side wall 153 can also be provided only around the second protruding portion 141, and the insulating partition wall 151 can be provided at a position further away from the first housing wall 11 than the insulating side wall 153 in the wall thickness direction X of the first housing wall 11. The insulating side wall 153 can also be provided around both the first protruding portion 131 and the second protruding portion 141. As shown in FIG. 17, only one insulating side wall 153 can be provided between the first protruding portion 131 and the second protruding portion 141, and the insulating partition wall 151 can be provided at a position further away from the first housing wall 11 than the insulating side wall 153. As shown in FIG. 8, one insulating side wall 153 can be provided around each of the first protruding portion 131 and the second protruding portion 141, and the insulating partition wall 151 can be provided on one of the insulating side walls 153 at a position further away from the first housing wall 11 than the insulating side wall 153. Here, the surrounding includes complete surrounding and partial surrounding. The partial surrounding means that the insulating side wall 153 is provided along a part of the outer periphery of the first protruding portion 131 or the second protruding portion 141. The insulating partition wall 151 can be provided on both of the insulating side walls 153, i.e., two insulating partition walls 151 can be provided. Alternatively, one insulating partition wall 151 can be shared by both of the insulating side walls 153.

[0153] Optionally, a surface of the insulating side wall 153 on a side facing away from the accommodation space 12 (e.g., an upper surface of the first side wall portion 1531 or an upper surface of the second side wall portion 1532 shown in FIG. 8) can be lower than a surface of the first electrode terminal 13 or the second electrode terminal 14 on a side facing away from the accommodation space 12 (e.g., an upper surface of the first electrode terminal 13 or the second electrode terminal 14 shown in FIG. 8) in the wall thickness direction X of the first housing wall 11. Alternatively, the surface of the insulating side wall 153 on the side facing away from the accommodation space 12 (e.g., the upper surface of the first side wall portion 1531 or the upper surface of the second side wall portion 1532 shown in FIG. 8) can be substantially flush with the surface of the first electrode terminal 13 or the second electrode terminal 14 on the side facing away from the accommodation space 12 (e.g., the upper surface of the first electrode terminal 13 or the second electrode terminal 14 shown in FIG. 8) in the wall thickness direction X of the first housing wall 11.

[0154] The insulating side wall 153 is arranged around at least one of the first protrusion 131 and the second protrusion 141, which not only can insulate the first protrusion 131 and / or the second protrusion 141 in the circumferential direction, reduce the probability of the first protrusion 131 and / or the second protrusion 141 conducting electricity with other components, but also can strengthen the strength of the first protrusion 131 and / or the second protrusion 141 in the direction perpendicular to the wall thickness direction X of the first shell wall 11 (for example, in the direction along the wall surface of the first shell wall), reduce the probability of the first protrusion 131 and / or the second protrusion 141 being displaced or deformed due to external force pulling. The insulating partition wall is arranged at a position farther away from the first shell wall than the insulating side wall, which can realize the insulation between the first electrode terminal and the second electrode terminal together with the insulating side wall, and because the insulating partition wall does not have to be arranged starting from the insulating bottom wall, the arrangement space can be saved, and the overall structure of the insulating piece can be simplified.

[0155] In some embodiments, as shown in FIGS. 7 and 8, the insulating side wall 153 includes a first side wall portion 1531 and a second side wall portion 1532, the first side wall portion 1531 (for example, the right side wall in the gap 16 shown in FIG. 8) is arranged close to the first protrusion 131, and the second side wall portion 1532 (for example, the left side wall in the gap 16 shown in FIG. 8) is arranged close to the second protrusion 141, and the insulating piece 15 further includes a connecting wall 154, the connecting wall 154 is arranged between the first side wall portion 1531 and the second side wall portion 1532, and the insulating partition wall 151 is arranged on the connecting wall 154 and extends from the connecting wall 154 in the wall thickness direction X of the first shell wall 11 towards the direction away from the first shell wall 11.

[0156] Optionally, in the wall thickness direction X of the first shell wall 11, the surface of the side of the connecting wall 154 away from the accommodation space 12 (for example, the upper surface of the connecting wall 154 shown in FIG. 8) is lower than the surface of the side of the first electrode terminal 13 or the second electrode terminal 14 away from the accommodation space 12 (for example, the upper surface of the first electrode terminal 13 or the second electrode terminal 14 shown in FIG. 8), or, in the wall thickness direction X of the first shell wall 11, the surface of the side of the connecting wall 154 away from the accommodation space 12 (for example, the upper surface of the connecting wall 154 shown in FIG. 8) is substantially flush with the surface of the side of the first electrode terminal 13 or the second electrode terminal 14 away from the accommodation space 12 (for example, the upper surface of the first electrode terminal 13 or the second electrode terminal 14 shown in FIG. 8).

[0157] The first side wall portion 1531 is arranged close to the first protrusion 131, and the second side wall portion 1532 is arranged close to the second protrusion 141, so that the creepage distance on the surface of the first electrode terminal 13 and the second electrode terminal 14 can be increased, and the insulation reliability can be improved. The first protrusion 131 and the second protrusion 141 are respectively provided with the insulation side wall 153 portion, so that not only the circumferential insulation of the first protrusion 131 and the second protrusion 141 can be achieved, and the probability of electric conduction between the first protrusion 131 and the second protrusion 141 and other components can be reduced, but also the strength of the first protrusion 131 and the second protrusion 141 in the direction perpendicular to the wall thickness direction X of the first shell wall 11 can be strengthened, and the probability of deformation of the first protrusion 131 and the second protrusion 141 due to external force pulling can be reduced. In addition, since the insulation isolation wall is arranged on the connecting wall and extends from the connecting wall to the wall thickness direction of the first shell wall in the direction away from the first shell wall, the arrangement space can be saved, and the overall structure of the insulation member can be simplified.

[0158] In some embodiments, as shown in FIG. 12, FIG. 14 or FIG. 17, the insulation member 15 further comprises an extension wall 155 connected to the end of the insulation side wall 153 away from the insulation bottom wall 152 in the wall thickness direction X (for example, the upper end shown in FIG. 12, FIG. 14 or FIG. 17), and at least one of the first protrusion 131 and the second protrusion 141 has an overlapping portion with the projection of the extension wall 155 in the same projection plane along the wall thickness direction X of the first shell wall 11.

[0159] Optionally, only the first protrusion 131 can have an overlapping portion with the projection of the extension wall 155 in the same projection plane along the wall thickness direction X of the first shell wall 11; only the second protrusion 141 can have an overlapping portion with the projection of the extension wall 155 in the same projection plane along the wall thickness direction X of the first shell wall 11; or as shown in FIG. 12, FIG. 14 or FIG. 17, the first protrusion 131 and the second protrusion 141 can both have an overlapping portion with the projection of the extension wall 155 in the same projection plane along the wall thickness direction X of the first shell wall 11.

[0160] Optionally, as shown in FIG. 17, the surface of the protruding wall 155 on the side facing away from the accommodation space 12 (for example, the upper surface of the protruding wall 155 shown in FIG. 8 or FIG. 17) is substantially flush with the surface of the first protruding portion 131 or the second protruding portion 141 on the side facing away from the accommodation space 12 (for example, the upper surface of the first protruding portion 131 or the second protruding portion 141 shown in FIG. 8 or FIG. 17) in the wall thickness direction X of the first housing wall 11; as shown in FIG. 12 or FIG. 14, the surface of the protruding wall 155 on the side facing away from the accommodation space 12 (for example, the upper surface of the protruding wall 155 shown in FIG. 8 or FIG. 17) is lower than the surface of the first protruding portion 131 or the second protruding portion 141 on the side facing away from the accommodation space 12 (for example, the upper surface of the first protruding portion 131 or the second protruding portion 141 shown in FIG. 8 or FIG. 17) in the wall thickness direction X of the first housing wall 11.

[0161] In the process of assembling the battery cell, the electrode terminal can be integrally formed with the insulating member 16.

[0162] The overall structure formed by the protruding wall 155 and the insulating side wall 153 can limit the displacement or bending deformation of the first protruding portion 131 and / or the second protruding portion 141 in the wall thickness direction of the first housing wall; when the first protruding portion 131 and the second protruding portion 141 both have overlapping portions with the protruding wall 155 in the wall thickness direction X of the first housing wall 11, when one electrode terminal is subjected to pulling or extrusion, the insulating member 15 can transfer the energy acting on this electrode terminal to the other electrode terminal, further enhancing the deformation resistance of the electrode terminal.

[0163] In some embodiments, as shown in FIG. 12 or FIG. 14, the insulating isolation wall 151 is arranged on the protruding wall 155 and extends in the direction away from the first housing wall 11.

[0164] In some embodiments, as shown in FIG. 12 or FIG. 14, the insulating isolation wall 151 is arranged on the protruding wall 155 and extends in the direction away from the first housing wall 11.

[0165] In this way, not only can the short circuit risk of the first protruding portion 131 and the second protruding portion 141 be reduced, but also when the first electrode terminal 13 and the second electrode terminal 14 are arranged compactly, due to the above arrangement, the length of the overlapping portion of the first electrode terminal 13 and the second electrode terminal 14 can be increased, and the risk of the overlapping of the busbars 3 on the first electrode terminal 13 and the second electrode terminal 14 can be reduced.

[0166] In some embodiments, as shown in FIG. 5 and FIG. 20, the insulating isolation wall 151 has at least one reinforcing rib, and the reinforcing rib extends in the wall thickness direction X of the first housing wall 11.

[0167] Optionally, a reinforcing rib extending in the wall thickness direction X of the first housing wall 11 can be provided on a surface of the insulation partition wall 151 perpendicular to the second direction Z, or the insulation partition wall 151 can be locally raised in the second direction Z.

[0168] Optionally, the reinforcing rib can be one, two, three, or more. When there are multiple reinforcing ribs, the multiple reinforcing ribs can be located on the same surface of the insulation partition wall 151 perpendicular to the second direction Z, or the multiple reinforcing ribs can be located on different surfaces of the insulation partition wall 151 perpendicular to the second direction Z.

[0169] Optionally, in the wall thickness direction X of the first housing wall 11, the reinforcing rib can extend beyond the insulation partition wall 151, or the reinforcing rib can be located within the range of the insulation partition wall 151. In a specific embodiment, the reinforcing rib is formed within the full length range of the insulation partition wall 151 in the wall thickness direction X.

[0170] The provision of the insulation partition wall 151 with at least one reinforcing rib can increase the strength of the insulation partition wall 151 and reduce the risk of the insulation partition wall 151 being deformed by external force.

[0171] In some embodiments, as shown in FIGS. 5 and 20, in the wall thickness direction X of the first housing wall 11 and away from the direction facing the accommodation space 12, the insulation partition wall 151 extends beyond both the first protruding portion 131 and the second protruding portion 141, and at least one reinforcing rib 1511 is provided in at least the extended portion. Of course, in the wall thickness direction X perpendicular to the first housing wall 11, the overlapping portion of the insulation partition wall 151 and the first protruding portion 131 or the second protruding portion 141 can also have a reinforcing rib.

[0172] Optionally, the extended portion can have one, two, three, or more reinforcing ribs 1511. The multiple reinforcing ribs 1511 can be arranged in a row along the first direction Y, and further, the multiple reinforcing ribs 1511 can be arranged in a row with intervals along the first direction Y.

[0173] When the extended portion has at least one reinforcing rib 1511, the busbar 3 can be connected and positioned with the electrode terminal through the reinforcing rib when different battery cells 10 are connected by the busbar 3, thereby improving the positioning accuracy of the busbar 3.

[0174] In some embodiments, as shown in FIG. 20, the reinforcing rib 1511 is formed within the full length range of the insulation partition wall 151 in the wall thickness direction X.

[0175] In this way, not only can the strength of the insulation partition wall 151 be further increased, thereby further reducing the risk of the insulation partition wall 151 being crushed by external force, but also the busbar 3 can be connected and positioned with the electrode terminal through the reinforcing rib when different battery cells 10 are connected by the busbar 3, thereby improving the positioning accuracy of the busbar 3.

[0176] In some embodiments, as shown in FIGS. 5 and 20, the reinforcing rib 1511 is protruded from the surface of the insulation partition wall 151 facing the first electrode terminal 13 and / or the second electrode terminal 14.

[0177] Optionally, the reinforcing rib 1511 can be protruded from the surface of the insulation partition wall 151 facing the first electrode terminal 13; the reinforcing rib 1511 can also be protruded from the surface of the insulation partition wall 151 facing the second electrode terminal 14; the reinforcing rib 1511 can also be protruded from the surface of the insulation partition wall 151 facing the first electrode terminal 13 and from the surface of the insulation partition wall 151 facing the second electrode terminal 14.

[0178] In some embodiments, as shown in FIGS. 5 and 20, the reinforcing rib is formed by a protruding portion formed in the insulation partition wall 151.

[0179] The insulation partition wall 151 can be protruded in one side or the other side of the second direction Z to form the reinforcing rib. When the reinforcing rib has multiple, the directions of the multiple protruding portions can be the same or opposite. In one specific embodiment, the reinforcing rib has two, and the directions of the two reinforcing ribs are opposite.

[0180] In this way, the insulation partition wall 151 not only can insulate the first electrode terminal 13 and the second electrode terminal 14 from each other, reducing the risk of the busbar 3 being overlapped, but also, the reinforcing rib protruded from the insulation partition wall can increase the strength of the insulation partition wall 151, improve the positioning accuracy of the busbar 3, and reduce the number of components and the cost.

[0181] In some embodiments, as shown in FIGS. 9 and 10, the first protruding portion 131 includes a first body portion 1311 and a first extension portion 1312 connected to each other, the second protruding portion 141 includes a second body portion 1411 and a second extension portion 1412 connected to each other, the gap 16 includes a first gap 161 formed between the first extension portion 1312 and the second extension portion 1412, and the insulation partition wall 151 is arranged at least in the first gap 161.

[0182] In the specific example shown in FIG. 9, the first body portion 1311 and the second body portion 1411 are formed in a substantially rectangular shape with the long sides extending along the second direction Z, and the first body portion 1311 and the second body portion 1411 are arranged along the first direction Y. The first extension portion 1312 and the second extension portion 1412 are each formed in a substantially rectangular shape with the long sides extending along the first direction Y, and the first extension portion 1312 and the second extension portion 1412 are arranged along the second direction. The first body portion 1311 and the second body portion 1411 are arranged relatively compactly along the first direction, that is, the distance between the first body portion 1311 and the second extension portion 1412 is relatively small, and the distance between the second body portion 1411 and the first extension portion 1312 is relatively small. However, the distance between the first body portion 1311 and the second extension portion 1412 can also be relatively large, and the distance between the second body portion 1411 and the first extension portion 1312 can also be relatively large. In this way, the first gap 161 is formed between the first extension portion 1312 and the second extension portion 1412.

[0183] Of course, FIG. 6 shows only one specific example, and the shapes and arrangement positions of the first body portion 1311, the first extension portion 1312, the second body portion 1411, and the second extension portion 1412 are not limited to the example shown in FIG. 9.

[0184] Furthermore, in the specific example shown in FIG. 6, along the second direction Z, the outer edge (the edge close to the long side of the first housing wall) of the second body portion 1411 is substantially flush with the first extension portion 1312, and the outer edge (the edge close to the long side of the first housing wall) of the first body portion 1311 is substantially flush with the second extension portion 1412. However, it can also not be flush. Alternatively, one of the outer edges of the second body portion 1411 and the first extension portion 1312 is closer to the long side of the first housing wall 11, and / or one of the outer edges of the first body portion 1311 and the second extension portion 1412 is closer to the long side of the first housing wall 11.

[0185] The arrangement of the protruding portions including the body portions and the extension portions can increase the contact area of the terminal plate with air, thereby increasing the contact area of the electrode terminal with air, thereby increasing the heat dissipation area and improving the heat dissipation performance of the electrode terminal, and further improving the use performance of the battery monomer 10. The arrangement of the insulating partition wall 151 in at least the first gap 161 can reduce the risk of short circuit of the first extension portion 1312 and the second extension portion 1412, and can also increase the length of the overlapping portion of the first extension portion 1312 and the second extension portion 1412.

[0186] In some embodiments, as shown in FIGS. 9 and 10, a second gap 162 is also formed between the first body portion 1311 and the second extension portion 1412, and the insulating partition wall 151 is arranged in the first gap 161 and the second gap 162.

[0187] The risk of short circuit of the first body portion 1311 and the second extension portion 1412 can be reduced, and the length of the overlapping portion of the first body portion 1311 and the second extension portion 1412 can be increased.

[0188] In some embodiments, as shown in FIGS. 11 and 12, the first body portion 1311 has a first protruding portion 13111 protruding along the first direction Y, and the second extension portion 1412 has a first stepped portion 14121 formed by being locally recessed along the wall thickness direction X; along the wall thickness direction X, the first protruding portion 13111 covers a portion of the first stepped portion 14121 from the side away from the first housing wall 11; and along the first direction Y, a first gap exists between the first protruding portion 13111 and a first stepped surface of the first stepped portion 14121 perpendicular to the first direction Y, wherein the first direction Y is perpendicular to the wall thickness direction X and coincides with the extension direction of the first extension portion 1312 and the second extension portion 1412; the first gap constitutes at least part of the second gap 162. That is, the insulating isolation wall 151 is also arranged at the first gap. Wherein the first stepped surface refers to the surface (for example, the upper surface shown in FIG. 12) of the first stepped portion 14121 perpendicular to the wall thickness direction X and away from the accommodation space 12 along the wall thickness direction X.

[0189] In the embodiments shown in FIGS. 11 and 12, the first stepped portion 14121 is a one-section stepped portion, and of course the number of sections of the first stepped portion can also be two or three or the like. When the first stepped portion is a multi-section stepped portion, the first protruding portion 13111 can cover one or more sections of the first stepped portion 14121 closest to the first protruding portion 13111 from the side away from the accommodation space 12.

[0190] In this way, the cooperation of the first protruding portion 13111 and the first stepped portion 14121 can achieve the limitation of the bending deformation of the second electrode terminal 14, and the first protruding portion 13111 covers a portion of the first stepped portion 14121, which not only can reduce the space occupied by the first protruding portion 13111 and improve the space utilization. By arranging the insulating isolation wall 151 at the first gap, the creepage distance on the surface of the first electrode terminal 13 and the second electrode terminal 14 can be increased, and the insulation reliability can be improved.

[0191] In some embodiments, as shown in FIGS. 9 and 10, a third gap 163 is also formed between the second body portion 1411 and the first extension portion 1312, and the insulating isolation wall 151 is arranged in the first gap 161, the second gap 162, and the third gap 163.

[0192] The insulating isolation wall 151 is arranged at the gap 16 between the first protruding part 131 and the second protruding part 141, which reduces the risk of short circuit between the electrode terminals and facilitates increasing the size of the overlapping part of the first protruding part 131 and the second protruding part 141.

[0193] In some embodiments, as shown in FIG. 13 and FIG. 14, the second main body part 1411 has a second protruding part 14111 extending along the first direction Y, and the first extending part 1312 has a second stepped part 13121 formed by being partially recessed along the wall thickness direction X; along the wall thickness direction X, the second protruding part 14111 covers a part of the second stepped part 13121 from the side away from the first shell wall 11; and along the first direction Y, there is a second gap between the second protruding part 14111 and a second stepped surface of the second stepped part 13121 perpendicular to the first direction Y, and the second gap constitutes at least part of a third gap 163. That is, the insulating isolation wall 151 is also arranged at the second gap. Wherein, the second stepped surface refers to the surface of the second stepped part 13121 perpendicular to the wall thickness direction X and away from the accommodation space 12 along the wall thickness direction X (for example, the upper surface shown in FIG. 12).

[0194] In the embodiments shown in FIG. 13 or FIG. 14, the second stepped part 13121 is a one-step stepped part, and of course the number of steps of the second stepped part 13121 can also be two or three or the like. When the second stepped part is a multi-step stepped part, the second protruding part 14111 can cover one or more steps of the second stepped part 13121 closest to the second protruding part 14111 from the side away from the first shell wall 11.

[0195] In this way, the cooperation of the second protruding part 14111 and the second stepped part 13121 can achieve the limitation of the bending deformation of the first electrode terminal 13, and further covering a part of the second stepped part 13121 by the second protruding part 14111 can not only reduce the space occupied by the second protruding part 14111, but also improve the space utilization. By arranging the insulating isolation wall 151 at the second gap, the creepage distance on the surface of the first electrode terminal 13 and the second electrode terminal 14 can be increased, and the insulation reliability can be improved.

[0196] In some embodiments, as shown in FIG. 9, FIG. 10 or FIG. 20, the first gap 161 extends along the first direction Y, the second gap 162 and the third gap 163 extend along the second direction Z, the first direction Y and the second direction Z are perpendicular to each other and are both perpendicular to the wall thickness direction X, and the insulating isolation wall 151 is located at the first gap 161, the second gap 162 and the third gap 163 and is formed as an integral piece.

[0197] That is, along the second direction Z, the first extension part 1312 and the second extension part 1412 have an overlapping part, thereby a first gap 161 extending along the first direction Y is formed between the first extension part 1312 and the second extension part 1412; along the first direction Y, the first main body part 1311 and the second extension part 1412 have an overlapping part, thereby a second gap 162 extending along the second direction Z is formed between the first main body part 1311 and the second extension part 1412; along the first direction Y, the second main body part 1411 and the first extension part 1312 have an overlapping part, thereby a third gap 163 extending along the second direction Z is formed between the second main body part 1411 and the first extension part 1312.

[0198] The first gap 161, the second gap 162 and the third gap 163 are in communication with each other, thereby the insulating isolation wall 151 located in the first gap 161, the second gap 162 and the third gap 163 can be formed as an integral piece. Of course, the insulating isolation wall 151 located in the first gap 161, the second gap 162 and the third gap 163 can also be formed as a separate piece, for example, different insulating isolation walls 151 are respectively arranged in the first gap 161, the second gap 162 and the third gap 163.

[0199] Thereby, the bending strength of the region of the first shell wall 11 where the electrode terminals are arranged can be improved by the synergy of the two electrode terminals. Moreover, the first electrode terminal 13 assembly and the second electrode terminal 14 can be arranged as compact as possible, which is conducive to the utilization of the non-electrode terminal arrangement region of the first shell wall 11, and further conducive to improving the volume utilization rate of the battery pack. The first gap 161, the second gap 162 and the third gap 163 all have the arrangement of the insulating isolation wall 151, which can reduce the risk of short circuit between the electrode terminals, and is conducive to increasing the size of the overlapping part. The insulating isolation wall 151 located in the first gap 161, the second gap 162 and the third gap 163 is formed as an integral piece, which is conducive to reducing the number of parts, speeding up the assembly speed and reducing the cost. The second aspect of the present disclosure provides a battery device 100. The battery device 100 comprises the battery monomer 10 provided in the first aspect.

[0200] Thereby, the risk of short circuit in the battery device 100 can be reduced.

[0201] In some embodiments, the plurality of battery cells 10 are arranged in an array; the battery device 100 further comprises a busbar assembly electrically connecting the battery cells 10 adjacent along the array direction of the battery cells 10, the busbar assembly comprises a first busbar 31 and a second busbar 32, in the same battery cell 10, along the wall thickness direction X of the first housing wall 11, the first busbar 31 is disposed on the side of the first electrode terminal 13 away from the first housing wall 11, the second busbar 32 is disposed on the side of the second electrode terminal 14 away from the first housing wall 11, along the wall thickness direction X of the first housing wall 11 and away from the orientation of the accommodation space 12, the insulating member 15 exceeds the surfaces of the first electrode terminal 13 and the second electrode terminal 14 away from the first housing wall 11.

[0202] In some embodiments, the same busbar 3 is used to connect the first electrode terminal 13 and the second electrode terminal 14 between adjacent battery cells 10, thereby achieving electrical connection between the battery cells 10.

[0203] In the specific embodiment shown in FIG. 5, the busbar 3 is configured in a rectangular thin plate shape, but is not limited to a rectangle and can be other suitable shapes, and is also not limited to a plate shape and can adopt other suitable three-dimensional shapes.

[0204] In the specific embodiment shown in FIG. 5, the busbar 3 is laminated to the extension portion of the electrode terminal, for example, in the same battery cell 10, along the wall thickness direction X of the first housing wall 11, the first busbar 31 is laminated to the first extension portion 1312 of the first electrode terminal 13, and the second busbar 32 is laminated to the second extension portion 1412 of the second electrode terminal 14. However, along the wall thickness direction X of the first housing wall 11, the busbar 3 is not limited to being laminated only to the extension portion, and the busbar 3 can also be laminated to the main body portion.

[0205] Along the wall thickness direction X of the first housing wall 11 and away from the orientation of the accommodation space 12, the insulating member 15 exceeds the upper surface of the first electrode terminal 13 (for example, the orientation shown in FIG. 5) and part of the first busbar 31, i.e., along the wall thickness direction X of the first housing wall 11, the surface of the insulating member 15 farthest away from the accommodation space 12 (for example, the upper surface of the insulating isolation portion shown in FIG. 8) can be located between the upper surface of the first electrode terminal 13 (for example, the orientation shown in FIG. 8) and the surface of the first busbar 31 farthest away from the accommodation space 12 (for example, the upper surface of the first busbar 31 shown in FIG. 8), further, along the wall thickness direction X of the first housing wall 11, the surface of the insulating member 15 farthest away from the accommodation space 12 (for example, the upper surface of the insulating isolation portion shown in FIG. 8) is farther away from the accommodation space 12 than the surface of the first busbar 31 farthest away from the accommodation space 12 (for example, the upper surface of the first busbar 31 shown in FIG. 8).

[0206] The insulating member 15 further extends beyond the upper surface of the second electrode terminal 14 (for example, the orientation shown in FIG. 5) and the second bus member 32, that is, the surface of the insulating member 15 farthest from the accommodation space 12 (for example, the upper surface of the insulating partition shown in FIG. 8) can be located between the upper surface of the second electrode terminal 14 (for example, the orientation shown in FIG. 8) and the surface of the second bus member 32 farthest from the accommodation space 12 (for example, the upper surface of the second bus member 32 shown in FIG. 8), and further, the surface of the insulating member 15 farthest from the accommodation space 12 (for example, the upper surface of the insulating partition shown in FIG. 8) is farther from the accommodation space 12 than the surface of the second bus member 32 farthest from the accommodation space 12 (for example, the upper surface of the second bus member 32 shown in FIG. 8) along the wall thickness direction X of the first housing wall 11.

[0207] Thus, when different battery cells 10 are connected by the bus members 3, the risk of short-circuiting between the bus members 3 can be reduced.

[0208] In some embodiments, the insulating member 15 extends beyond the first bus member 31 and the second bus member 32 away from the surface of the first housing wall 11 along the wall thickness direction X of the first housing wall 11 and away from the accommodation space 12. That is, the surface of the insulating member 15 farthest from the accommodation space 12 (for example, the upper surface of the insulating partition shown in FIG. 8) is farther from the accommodation space 12 than the surface of the first bus member 31 farthest from the accommodation space 12 (for example, the upper surface of the first bus member 31 shown in FIG. 8) along the wall thickness direction X of the first housing wall 11, and the surface of the insulating member 15 farthest from the accommodation space 12 (for example, the upper surface of the insulating partition shown in FIG. 8) is farther from the accommodation space 12 than the surface of the second bus member 32 farthest from the accommodation space 12 (for example, the upper surface of the second bus member 32 shown in FIG. 8) along the wall thickness direction X of the first housing wall 11.

[0209] Thus, when different battery cells 10 are connected by the bus members 3, the risk of short-circuiting between the bus members 3 can be further reduced.

[0210] In some embodiments, as shown in FIGS. 8 and 10, the insulating member 15 includes an insulating partition wall 151, and the insulating partition wall 151 is partially located between the first bus member 31 and the second bus member 32, and the first bus member 31 and the second bus member 32 respectively abut against the insulating partition wall 151.

[0211] In some embodiments, as shown in FIGS. 8 and 10, the first end edge 311 of the first bus member 31 (for example, the lower end edge of the first bus member 31 shown in FIG. 10) and the second end edge 321 of the second bus member 32 respectively abut against the insulating partition wall 151 (for example, the upper end edge of the first bus member 31 shown in FIG. 10).

[0212] The first busbar 31 and the second busbar 32 are insulated by the insulation partition wall 151, reducing the risk of short circuit between the busbars 3.

[0213] In some embodiments, the insulation partition wall 151 is provided with a first reinforcing rib 15111 on a side facing the first busbar 31, and a second reinforcing rib 15112 on a side facing the second busbar 32. The first busbar 31 is provided with a first recess 3111, and the second busbar 32 is provided with a second recess 3211. The first recess 3111 is matched with the first reinforcing rib 15111, and the second recess 3211 is matched with the second reinforcing rib 15112. Of course, the insulation partition wall 151 can be provided with more reinforcing ribs.

[0214] The insulation partition wall 151 is provided with a first reinforcing rib 15111 on a side facing the first end edge 311, and a second reinforcing rib 15112 on a side facing the second end edge 321. The first reinforcing rib 15111 extends along a direction perpendicular to the first end edge 311, and the second reinforcing rib 15112 extends along a direction perpendicular to the second end edge 321. The first busbar 31 is provided with a first recess 3111, and the second busbar 32 is provided with a second recess 3211. The first recess 3111 is matched with the first reinforcing rib 15111, and the second recess 3211 is matched with the second reinforcing rib 15112. Of course, the insulation partition wall 151 can be provided with more reinforcing ribs.

[0215] The first recess 3111 can be recessed from a surface (e.g., the lower surface shown in FIG. 10) of the first end edge 311 along the second direction Z and away from the side of the second end edge 321. The second recess 3211 can be recessed from a surface (e.g., the upper surface shown in FIG. 10) of the second end edge 321 along the second direction Z and away from the side of the first end edge 311.

[0216] When different battery monomers 10 are connected by the busbars 3, the busbars 3 can be positioned by the recesses and the reinforcing ribs, improving the positioning accuracy of the busbars 3. In some embodiments, the first reinforcing rib 15111 and the second reinforcing rib 15112 are spaced apart.

[0217] The spacing between the first reinforcing rib 15111 and the second reinforcing rib 15112 is not specifically limited here, but should be able to allow the first recess 3111 to match the first reinforcing rib 15111, and the second recess 3211 to match the second reinforcing rib 15112.

[0218] In this way, the strength of the insulation partition wall 151 can be further increased, and the positioning accuracy of the busbars 3 can be further improved.

[0219] In some embodiments, as shown in FIG. 21, the battery device 100 includes a box in which each battery cell 10 is accommodated, at least one box wall of the box has a boss 111a, the boss 111a forms an accommodation portion 111b on a side facing the battery cell 10, and at least part of the first electrode terminal 13, the second electrode terminal 14, the busbar 3 assembly, and the insulating member 15 are accommodated in the accommodation portion 111b.

[0220] Therefore, the height of the box at the positions of the first electrode terminal 13, the second electrode terminal 14, and the busbar 3 can be increased only, so that the size of the battery device 100 can be reduced, and the volume utilization of the battery device 100 can also be improved.

[0221] The third aspect of the present disclosure provides a power utilization device. The power utilization device includes the battery cell 10 provided in the first aspect or the battery device 100 provided in the second aspect, and the battery cell 10 or the battery device 100 is used to store or provide electric energy.

[0222] Therefore, the risk of short circuit of the first electrode terminal 13 and the second electrode terminal 14 in the power utilization device can be reduced, and the risk of overlap between the busbar 3 on the first electrode terminal 13 and the second electrode terminal 14 can also be reduced.

[0223] The fourth aspect of the present disclosure provides an energy storage device. The energy storage device includes the battery cell 10 provided in the first aspect or the battery device 100 provided in the second aspect, and the battery cell 10 or the battery device 100 is used to store or provide electric energy.

[0224] Therefore, the risk of short circuit of the first electrode terminal 13 and the second electrode terminal 14 in the energy storage device can be reduced, and the risk of overlap between the busbar 3 on the first electrode terminal 13 and the second electrode terminal 14 can also be reduced.

[0225] In a specific embodiment, there is a linear connection area between the positive electrode pole and the negative electrode pole, a plastic partition is arranged at the linear connection area, which increases the difficulty of overlap between the positive electrode pole and the negative electrode pole, and reduces the risk of short circuit of the outer end of the positive electrode pole or the negative electrode pole. A local reinforcing portion is arranged at the plastic partition, which can improve the strength of the plastic partition, and the reinforcing portion is matched with the groove on the busbar 3, which can improve the positioning accuracy of the busbar 3.

[0226] Taking the orientation shown in FIG. 5 as an example, the distance between the upper surface of the plastic partition and the lower surface of the busbar 3 along the wall thickness direction X of the first shell wall 11 is within the range of 0.2 mm to 10 mm, and further, along the wall thickness direction X of the first shell wall 11, the upper surface of the plastic partition is higher than the upper surface of the busbar 3.

[0227] The various embodiments / embodiments provided by the present disclosure can be combined with each other without producing contradictions.

[0228] The above merely describes the preferred embodiments of the present disclosure and is not intended to limit the present disclosure. The present disclosure can have various modifications and changes for those skilled in the art. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure. Industrial applicability

[0229] The present disclosure provides a battery cell, a battery device, a power consumption device, and an energy storage device. In the battery cell, an insulating member is arranged between the first electrode terminal and the second electrode terminal, which can reduce the risk of short circuit of the first electrode terminal and the second electrode terminal; even if the first electrode terminal and the second electrode terminal are arranged compactly and close to each other in a long range, short circuit is not easily caused by creeping or the like. Moreover, since the first electrode terminal and the second electrode terminal can be arranged compactly in the same housing wall of the housing, it is beneficial to improve the volume utilization rate of the battery. In addition, the insulating member exceeds the upper surfaces of both the first electrode terminal and the second electrode terminal, which can improve the insulation reliability between the first electrode terminal and the second electrode terminal.

Claims

1. A battery cell, wherein, The battery cell includes: a housing having a housing space, the housing including a first housing wall; an electrode assembly disposed at least partially in the housing space, the electrode assembly including first and second tabs of opposite polarity; first and second electrode terminals disposed on the first housing wall, the first electrode terminal being electrically connected to the first tab, and the second electrode terminal being electrically connected to the second tab; an insulating member disposed at least partially between the first and second electrode terminals; the insulating member being located between the first and second electrode terminals in a direction along a wall thickness of the first housing wall and away from a direction toward the housing space.

2. The battery cell according to claim 1, wherein the first electrode terminal has a first protruding portion protruding from an outer surface of the first housing wall, and the second electrode terminal has a second protruding portion protruding from the outer surface of the first housing wall, a gap being formed between the first and second protruding portions; the insulating member includes an insulating partition wall disposed in the gap to partition the first and second protruding portions, and the insulating partition wall protrudes from the first and second protruding portions in the direction along the wall thickness of the first housing wall and away from the direction toward the housing space.

3. The battery cell according to claim 2, wherein the insulating member includes an insulating bottom wall and the insulating partition wall; the insulating bottom wall is disposed between at least one of the first and second protruding portions and the first housing wall, and the insulating partition wall is connected to the insulating bottom wall.

4. The battery cell according to claim 3, wherein the insulating bottom wall is disposed between both of the first and second protruding portions and the first housing wall, and the insulating bottom wall and the insulating partition wall are formed as a single piece.

5. The battery cell according to claim 3 or 4, wherein the insulating member further includes an insulating side wall connected to the insulating bottom wall and extending in the direction along the wall thickness of the first housing wall, the insulating side wall being disposed around at least one of the first and second protruding portions, and the insulating partition wall is disposed farther from the first housing wall than the insulating side wall in the direction along the wall thickness of the first housing wall.

6. The battery cell according to claim 5, wherein the insulating side wall includes first and second side wall portions disposed in the gap, the first side wall portion being disposed proximate to the first protruding portion, and the second side wall portion being disposed proximate to the second protruding portion, the insulating member further includes a connecting wall disposed between the first and second side wall portions, the insulating partition wall is disposed on the connecting wall and extends from the connecting wall in the direction along the wall thickness of the first housing wall toward the direction away from the first housing wall.

7. The battery cell according to claim 5 or 6, wherein The insulating member further includes a protruding wall connected to an end portion of the insulating side wall away from the insulating bottom wall in the wall thickness direction of the first housing wall, At least one of the first protruding portion and the second protruding portion has an overlapping portion with a projection of the protruding wall in the same projection plane in the wall thickness direction of the first housing wall.

8. The battery cell according to claim 7, wherein The insulating partition wall is provided at the protruding wall extending in a direction away from the first housing wall.

9. The battery cell according to any one of claims 2 to 8, wherein The insulating partition wall has at least one reinforcing rib extending in the wall thickness direction of the first housing wall.

10. The battery cell according to any one of claims 2 to 8, wherein The insulating partition wall extends beyond both the first protruding portion and the second protruding portion in the wall thickness direction of the first housing wall and in a direction away from the accommodation space, and has at least one reinforcing rib at least at the portion extending beyond.

11. The battery cell according to any one of claims 9 to 10, wherein The reinforcing rib is provided protruding from a surface of the insulating partition wall facing the first electrode terminal and / or the second electrode terminal.

12. The battery cell according to any one of claims 2 to 11, wherein The first protruding portion includes a first main body portion and a first extension portion connected to each other, The second protruding portion includes a second main body portion and a second extension portion connected to each other, The gap includes a first gap formed between the first extension portion and the second extension portion, and the insulating partition wall is provided at least in the first gap.

13. The battery cell according to claim 12, wherein A second gap is further formed between the first main body portion and the second extension portion, and the insulating partition wall is provided in the first gap and the second gap.

14. The battery cell according to claim 13, wherein The first main body portion has a first protruding portion protruding in a first direction, and the second extension portion has a first step portion formed by being partially recessed in the wall thickness direction; The first protruding portion covers a portion of the first step portion from a side away from the first housing wall in the wall thickness direction, and a first gap is present between the first protruding portion and a first step surface of the first step portion perpendicular to the first direction in the first direction, the first direction being perpendicular to the wall thickness direction and coinciding with the extension direction of the first extension portion and the second extension portion; The first gap constitutes at least a portion of the second gap.

15. The battery cell according to claim 13 or 14, wherein A third gap is further formed between the second main body portion and the first extension portion, and the insulating partition wall is provided in the first gap, the second gap, and the third gap.

16. The battery cell according to claim 15, wherein The second main body portion has a second protruding portion protruding in a first direction, and the first extension portion has a second step portion formed by being partially recessed in the wall thickness direction a second step portion formed by recessing in the first direction, the second protruding portion covering a portion of the second step portion from a side away from the first case wall in the wall thickness direction, and a second gap between the second protruding portion and a second step face of the second step portion perpendicular to the first direction in the first direction, the second gap constituting at least a portion of the third gap.

17. The battery cell according to claim 15 or 16, wherein the first gap extends in a first direction, the second gap and the third gap extend in a second direction, the first direction and the second direction are perpendicular to each other and are both perpendicular to the wall thickness direction, the insulating partition wall is located in and constitutes an integral piece with the first gap, the second gap, and the third gap.

18. A battery device, wherein, including: the battery cell according to any one of claims 1 to 17.

19. The battery device according to claim 18, wherein a plurality of the battery cells are arranged with each other; the battery device further includes: a bus member assembly electrically connecting the battery cells adjacent in the arrangement direction of the battery cells, the bus member assembly includes a first bus member and a second bus member, in the same battery cell, the first bus member is disposed on a side of the first electrode terminal away from the first case wall in the wall thickness direction of the first case wall, the second bus member is disposed on a side of the second electrode terminal away from the first case wall in the wall thickness direction of the first case wall, the insulating member exceeds surfaces of the first electrode terminal and the second electrode terminal away from the first case wall in the wall thickness direction of the first case wall and in a direction away from the accommodation space.

20. The battery device according to claim 19, wherein the insulating member exceeds surfaces of the first bus member and the second bus member away from the first case wall in the wall thickness direction of the first case wall and in a direction away from the accommodation space.

21. The battery device according to claim 19 or 20, wherein the insulating member includes an insulating partition wall, the insulating partition wall is partially located between the first bus member and the second bus member, the first bus member and the second bus member respectively abut against the insulating partition wall.

22. The battery device according to claim 21, wherein the insulating partition wall is provided with a first reinforcing rib on a side toward the first bus member and a second reinforcing rib on a side toward the second bus member, the first bus member is provided with a first recess portion, the second bus member is provided with a second recess portion, the first recess portion cooperates with the first reinforcing rib, and the second recess portion cooperates with the second reinforcing rib.

23. The battery device according to claim 22, wherein the first reinforcing rib and the second reinforcing rib are disposed in a spaced-apart manner.

24. The battery device according to any one of claims 18 to 23, wherein the battery device includes a case, each of the battery cells is accommodated in the case, at least one case wall of the case has a boss, the boss forms an accommodation portion on a side toward the battery cell, At least a portion of the first electrode terminal, the second electrode terminal, the busbar assembly, and the insulator is housed in the housing.

25. An electrical device, comprising: A battery cell as claimed in any one of claims 1 to 17 or a battery device as claimed in any one of claims 18 to 24 for storing or providing electrical energy.

26. An energy storage device, wherein, A battery cell as claimed in any one of claims 1 to 17 or a battery device as claimed in any one of claims 18 to 24 for storing or providing electrical energy.

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