Abstract: The present disclosure relates to the technical field of energy storage devices, and provides a battery cell assembly (10), a battery module (100), and a battery pack (200). The battery cell assembly (10) includes: at least two battery cells (1) and an insulation film (2). The at least two battery cells (1) are stacked. Each battery cell (1) includes an electrode assembly (11) and a battery housing (12). The electrode assembly (11) is accommodated in the battery housing (12). The electrode assembly (11) includes a first electrode plate (111), a second electrode plate (112), and a separator (113) disposed between the first electrode plate (111) and the second electrode plate (112). The insulation film (2) surrounds a periphery of the at least two battery cells (1) to wrap the at least two battery cells (1) together.

Abstract: Disclosed is a battery module including a battery cell array structure, an upper cap and a lower cap, the battery cell array structure is disposed between the upper cap and the lower cap. Each battery cell includes an electrode assembly and a battery case. The electrode assembly is of a wound structure and flat, outer surface of the electrode assembly includes two flat surfaces facing each other in a vertical direction; or the electrode assembly is of a laminated structure, the first electrode plate, the separator and the second electrode plate are laminated in the vertical direction. Being distinguished from the existing technology, the maximum swelling force of the battery module may be reduced, thus end plates with smaller volumes may be selected to improve energy density of the battery module.

Abstract: Disclosed are a secondary battery, a battery module and an electric vehicle. The battery module includes a plurality of secondary batteries arranged in sequence. The secondary battery includes an electrode assembly, a housing and a top cover assembly. The electrode assembly is accommodated in an accommodating chamber of the housing. The electrode assembly includes a plurality of electrode units, the plurality of electrode units being stacked in an axial direction of the accommodating chamber. The top cover assembly includes a top cover plate and an insulating member arranged on an inner side of the top cover plate, the top cover plate being connected to the housing, the insulating member being located on a side of the electrode assembly in the axial direction. A first buffer gap is provided between the insulating member and the top cover plate.

Abstract: The disclosure relates to a secondary battery and a battery module. The secondary battery comprises a casing, which includes a receiving hole having an opening; a top cover assembly, which includes a top cover plate connected to the casing to close the opening; an electrode assembly disposed within the receiving hole, the electrode assembly has an dimension of 0.01 mm to 1000 mm in an axial direction of the receiving hole, the electrode assembly includes two end faces opposed to each other in a first direction perpendicular to the axial direction and tabs extending from the end faces, the electrode assembly includes two or more electrode units laminated in the axial direction, and in a second direction perpendicular to the axial direction and the first direction, the dimension of the tab is smaller than the dimension of the end face; and a current collecting member electrically connected to the tab.

Abstract: The present disclosure provides a battery module and a battery pack. The battery pack comprises a box and a battery module, the battery module is accommodated in the box. The battery module comprises batteries sequentially arranged in a first direction. The battery comprises an electrode assembly, a case and a cap assembly, the electrode assembly is received in the case, and the cap assembly is connected with the case. The case comprises two first side walls, and the two first side walls are respectively positioned at two sides of the electrode assembly in the first direction. The first side walls of two adjacent batteries face each other. An area of the first side wall is defined as S1, a distance between the electrode assemblies of two adjacent batteries in the first direction is defined as D, S1 and D satisfying a relationship: 1.2×10?5 mm?1?D/S1?500×10?5 mm?1.

Abstract: The present application relates to a current collector and a secondary battery. The current collector is used to electrically connect a pole and tab of a secondary battery, and comprises: a first sheet; a second sheet that is disposed to intersect the first sheet, the second sheet being used to electrically connect to the pole; a current collection unit, the current collection unit and the second sheet being disposed at two opposite sides of the first sheet in a first thickness direction thereof, and the first thickness direction thereof intersecting with a second thickness direction of the second sheet; the current collection unit comprises a first current collection sheet, the first current collection sheet is used to electrically connect to the tab, and the first current collection sheet is provided with a first connection terminal that is connected to the first sheet.

Abstract: The present disclosure relates to a secondary battery and a battery module. The secondary battery comprises a case, comprising a base plate and a side plate connected with the base plate, wherein the base plate and the side plate form a receiving hole and an opening in communication with the receiving hole, the opening is arranged opposite to the base plate in an axial direction of the receiving hole, and the base plate has a thickness larger than that of the side plate; a cap assembly, sealingly connected with the side plate to close the opening; and an electrode assembly, disposed in the receiving hole and comprising two or more electrode units, which are stacked in the axial direction, and each electrode unit is arranged with a wide side opposite to the base plate and a narrow side toward the side plate.

Abstract: The present disclosure relates to a secondary battery and a battery module. The secondary battery includes a case including a receiving space with an opening; a cap assembly connected to the case and close the opening; an electrode assembly disposed in the receiving space and including two end faces opposite to each other in a first direction perpendicular to an axial direction of the receiving space, and tabs extending from the end faces and two or more electrode units stacked in the axial direction; and a current collecting unit, including a first piece extending in the axial direction and a first current collecting piece connected to the first piece, the tab extends in the first direction and is connected to the first current collecting piece, and a portion of the tab connected to the first current collecting piece and the first current collecting piece are stacked in the axial direction.

Abstract: The disclosure provides a battery pack, which includes a plurality of batteries and a box, the plurality of batteries accommodated in the box; each battery including an explosion-proof valve; the box including a lower box for supporting the batteries and an upper box matching the lower box, wherein the upper box includes an upper plate and a lower plate, the upper plate covers the lower plate to form an accommodating space for accommodating a fire extinguishing agent; the explosion-proof valve of each battery faces the lower plate of the upper box, and the lower plate is set to be able to discharge the fire extinguishing agent from the accommodating space after being melted. When the battery occurs a thermal runaway, the fire extinguishing agent in the lower plate flows rapidly to the runaway area, thus inhibiting the thermal runaway of the battery.

Abstract: The present application relates to a current collector and a secondary battery. The current collector is used to electrically connect a pole and tab of a secondary battery, and comprises: a first sheet; a second sheet that is disposed to intersect the first sheet, the second sheet being used to electrically connect to the pole; a current collection unit, the current collection unit and the second sheet being disposed at two opposite sides of the first sheet in a first thickness direction thereof, and the first thickness direction thereof intersecting with a second thickness direction of the second sheet; the current collection unit comprises a first current collection sheet, the first current collection sheet is used to electrically connect to the tab, and the first current collection sheet is provided with a first connection terminal that is connected to the first sheet.

Abstract: The application provides a battery module, which includes a plurality of batteries, an upper cover, and a pressing strip. The pressing strip covers an explosion-proof valve of a battery, and includes a main body portion and a bottom plate portion. The bottom plate portion is connected to the main body portion and forms an accommodating cavity together with the main body portion. A fire extinguishing agent is sealed in the accommodating cavity. The bottom plate portion of the pressing strip is configured to be melted. The fire extinguishing agent is constantly stored in the accommodating cavity of the pressing strip, so as to avoid wasteful use of the fire extinguishing agent caused by the same flowing in all directions, so that the amount of the fire extinguishing agent can be maintained at a constant level at all times.

Abstract: The embodiments of the present disclosure provide a battery module and a battery pack. A battery module includes: a cooling component; and a battery group, comprising secondary batteries disposed side by side in a first direction and each including a case having an accommodating hole, an electrode assembly disposed in the accommodating hole, and a cap assembly, the electrode assembly including two end faces disposed opposite to each other in a second direction intersecting the first direction and an electrode tab extending from each end face. The secondary batteries each includes two sides opposite to each other in the second direction, the cooling component is disposed on at least one of the two sides, the cooling component and the end face are respectively disposed on two sides of the case in the second direction, and the cooling component is connected and fixed to each of the secondary batteries.

Abstract: The present application relates to a secondary battery and a battery module. The secondary battery comprises: a casing, which is provided with an accommodating hole with an opening; a top cover assembly, which is in sealed connection with the casing to close the opening; an electrode assembly, which is arranged in the accommodating hole, and comprises two end faces opposite to a first direction perpendicular to an axial direction of the accommodating hole, and tabs extending from the end faces, the electrode assembly comprises two or more electrode units, wherein two or more electrode units are stacked in the axial direction, and in a second direction perpendicular to the axial direction and the first direction, the size of the tabs is smaller than that of the end faces; and a current collector, which comprises a body portion.

Abstract: The present disclosure relates to a battery module and a battery pack. The battery module comprises two or more secondary batteries arranged side by side in a first direction, each of which includes a case, an electrode assembly and a closing portion, wherein the case has a receiving hole comprising an opening and extending in a second direction, and the first direction intersects with the second direction, wherein the closing portion is sealingly connected with the case to close the opening, the electrode assembly is disposed in the receiving hole and includes two or more electrode units, the electrode unit includes a first electrode plate, a second electrode plate and a separator, and the two or more electrode units are stacked in the second direction.

Abstract: The present disclosure provides a battery module and a battery pack. The battery pack comprises a box and a battery module, the battery module is accommodated in the box. The battery module comprises batteries sequentially arranged in a first direction. The battery comprises an electrode assembly, a case and a cap assembly, the electrode assembly is received in the case, and the cap assembly is connected with the case. The case comprises two first side walls, and the two first side walls are respectively positioned at two sides of the electrode assembly in the first direction. The first side walls of two adjacent batteries face each other. An area of the first side wall is defined as S1, a distance between the electrode assemblies of two adjacent batteries in the first direction is defined as D, S1 and D satisfying a relationship: 1.2×10?5 mm?1?D/S1?500×10?5 mm?1.

Abstract: The present disclosure provides a battery pack and a vehicle. The battery pack comprises a battery module, a box assembly and a first adhesive member. The battery module comprises first batteries arranged sequentially in a horizontal direction. The first battery comprises an electrode assembly and a case, and the electrode assembly is received in the case. The electrode assembly comprises a first electrode plate, a second electrode plate and a separator. The box assembly has a connection portion, and the connection portion is positioned at a side of the battery module in the vertical direction. An outer surface of the case comprises a first surface, and the first surface is connected with the connection portion via the first adhesive member. An area A of the first surface and an elastic modulus B of the first adhesive member satisfy a relationship: 0.02 cm2/MPa?A/B?9 cm2/MPa.

Abstract: Disclosed herein is a battery pack including a box body and a plurality of battery modules disposed in the box body and arranged in a horizontal direction. The battery module can include a plurality of battery cells electrically connected to each other by a plurality of first bus bars, the battery cell can include a battery case and two electrode terminals. The disclosed arrangement of the battery modules in the battery pack can effectively avoid short-circuiting the electrode terminals of the battery module caused by the collapse of the box body toward the inside, thereby improving the safety of the battery pack.

Abstract: The present disclosure provides a battery pack and a vehicle. The battery pack comprises a battery module, a box assembly and a first adhesive member. The battery module comprises first batteries arranged sequentially in a horizontal direction. The first battery comprises an electrode assembly and a case, and the electrode assembly is received in the case. The electrode assembly comprises a first electrode plate, a second electrode plate and a separator. The box assembly has a connection portion, and the connection portion is positioned at a side of the battery module in the vertical direction. An outer surface of the case comprises a first surface, and the first surface is connected with the connection portion via the first adhesive member. An area A of the first surface and an elastic modulus B of the first adhesive member satisfy a relationship: 0.02 cm2/MPa?A/B?9 cm2/MPa.

Abstract: The disclosure relates to a secondary battery and a battery module. The secondary battery comprises: a case comprising a receiving hole having an opening; a cap assembly connected with the case to close the opening; an electrode assembly disposed in the receiving hole, wherein the electrode assembly comprises two end surfaces opposite to each other in a first direction and tabs extending from respective end surfaces, and there are two or more electrode assemblies stacked in the axial direction; and a current collector comprising an extending portion and a current collecting portion connected to the tab, wherein the extending portion extends in the axial direction, the current collecting portion comprises a connecting end extending in a second direction perpendicular to both the axial direction and the first direction, and is connected to an end of the extending portion away from the cap assembly through the connecting end.

Abstract: The present invention relates to a secondary battery and a battery module. The secondary battery includes: a casing including a receiving cavity having an opening; a top cover assembly, and an electrode assembly disposed in the receiving cavity, wherein the electrode assembly includes two end faces disposed opposite to each other in a first direction perpendicular to a depth direction of the receiving cavity, a lug extending from each end face; the lug is a layered structure and has a redundant section near the end face and a connecting section connected to the redundant section; the current collecting member includes a current collecting portion fixedly connected to the connecting section. The lug of the secondary battery of the embodiment of the present invention has the redundant section, which can effectively buffer the movement and reduce the possibility that the lug is torn or broken due to an excessive tensile stress.