2425results about "Electric connector introduction" patented technology

The utility model discloses a single battery and a battery pack with the single battery, the single battery comprises a shell, a pole group, an anti-explosion valve and a side plate, the shell defines a mounting space, and openings are arranged at two ends of the shell along the length direction of the single battery; the pole group is arranged in the mounting space, and the outer side of the pole group is coated with an insulating film; the anti-explosion valve is arranged in the mounting space and is positioned on one side of the shell along the width direction of the battery monomers, and an avoiding hole corresponding to the anti-explosion valve is formed in the shell; the side plate is arranged between the insulating film and the anti-explosion valve, a plurality of through holes are formed in the side plate, and the through holes penetrate through the side plate; wherein a concave part is arranged on the side wall of one end, far away from the side plate, of the shell along the width direction of the single battery, and the bottom wall, close to the side plate, of the concave part protrudes towards the side plate. According to the battery monomer disclosed by the utility model, the cracking risk of the battery monomer is relatively low, and the risk of heat spreading between adjacent battery monomers is relatively low.

The invention relates to a top cover assembly and a tab welding method, at least two second connecting parts of a pole are arranged at intervals along the width direction of a cover plate, and tabs extending from at least two groups of battery cells in a battery cell assembly respectively correspond to the positions of the at least two second connecting parts. When the pole column and the battery cell assembly are welded, the tabs of the at least two groups of battery cells can be respectively welded with the tab welding surfaces of the at least two second connecting parts, so that an adapter plate is omitted, and the welding process is reduced. Moreover, due to the omission of an adapter plate, the first electrode and the second electrode can be adopted to apply pressure to the pole and the tab from the two sides respectively, so that the tab and the pole are welded in a pressure welding manner. Local heating is adopted in press fusion welding, the welding time is short, and welding slag is not generated in the welding process. Therefore, the top cover assembly and the tab welding method can ensure the quality of the battery on the premise of improving the assembly efficiency. In addition, the invention also provides a battery monomer, a battery and an electric device.

The utility model provides a battery cell top cover and a battery, and relates to the technical field of lithium batteries. Specifically, the battery cell top cover comprises a cover plate, an upper pole and a lower pole, wherein the cover plate is provided with pole holes for accommodating the upper pole and the lower pole; the upper pole partially protrudes downwards to form a first groove, the lower pole partially protrudes upwards to form a second groove, and the bottom wall of the first groove is connected with the bottom wall of the second groove. Based on the arrangement of the first groove and the second groove, the weights of the upper pole and the lower pole are respectively reduced, and certain materials of the upper pole and the lower pole are saved, so that the lightweight design of the battery cell top cover is realized, and the manufacturing cost of the battery cell top cover is reduced at the same time.

The invention discloses a manufacturing method of a battery monomer, the battery monomer, a battery and a power utilization device. The invention relates to a manufacturing method of a battery monomer. The manufacturing method of the battery monomer comprises the following steps: connecting an electrode leading-out piece of a naked battery cell with an electrode part; the connected electrode lead-out piece is bent, so that the naked battery cell enters the containing space of the shell through an opening, and the opening of the shell is the side face with the largest area of the shell; and the top cover is connected with the shell so as to seal the opening. According to the battery cell, the bare battery cell of the battery cell can be conveniently installed under the condition that the electrode part is not arranged on the top cover.

A rechargeable battery includes: a case receiving an electrode assembly and including an opening; a cap assembly including a cap plate coupled to the case to cover the opening, and a terminal plate thermally fused to the cap plate by a thermal-fusion member, the thermal-fusion member electrically insulating the cap plate and the terminal plate from each other; and a sealing part attached to and located on a side of the thermal-fusion member, a side surface of the terminal plate, and an outer surface of the cap plate.

The invention relates to a pole, a top cover assembly, a battery monomer, a battery and an electric device. The pole comprises a first connecting part, a second connecting part and a fusing part, the at least two second connecting parts are arranged at intervals along the preset direction, namely the thickness direction of the shell, so that the tabs extending from the at least two groups of battery cells in the battery cell assembly respectively correspond to the positions of the at least two second connecting parts. When the pole column and the battery cell assembly are welded, the tabs of each group of battery cells can be directly welded with the corresponding second connecting parts respectively, so that an adapter plate is omitted. And when the single battery is abnormal, the fusing part between the first connecting part and the second connecting part is easy to fuse, so that the circuit is cut off. Therefore, the pole, the top cover assembly and the battery monomer can ensure the safety on the premise of omitting an adapter plate.

The invention provides a battery. The battery comprises a shell, a cover body, a battery cell, a pole assembly and an insulating glue layer, the cover body is buckled on the shell; the battery cell is located in a cavity defined by the shell and the cover body, and a first tab of the battery cell is conductively connected with the shell; a pole assembly arranged on the shell in a penetrating manner is connected with a second tab of the battery cell; the pole assembly comprises a connecting sheet and a pole; the insulating rubber layer is arranged between the connecting sheet and the side wall of the shell; a first hole is formed in the side wall of the shell, a second hole is formed in the insulating glue layer, the pole penetrates through the overlapping area of the first hole and the second hole, at least part of the connecting piece is exposed in the overlapping area of the first hole and the second hole, and the connecting piece exposed in the overlapping area is connected with the second tab through a first welding mark. The projection of the first welding mark does not coincide with the projection of the pole. Through the mode, compared with a riveting mode, the welding connection mode is low in cost, and the problem of poor air tightness or short circuit of the battery caused by riveting can be avoided.

The invention relates to the technical field of battery energy, in particular to a battery cell and a battery. The battery cell comprises a first pole piece, a diaphragm and a second pole piece, the first pole piece and the second pole piece are stacked, and the diaphragm is arranged between the first pole piece and the second pole piece; and along the first direction, the stripping force F1 between the diaphragm on the outermost side and the second pole piece adjacent to the diaphragm meets the condition that F1 is greater than or equal to 13N / m. By improving the adhesion between the diaphragm on the outermost side of the battery cell and the second pole piece, the problem of curling and warping of the single-sided pole piece in the battery cell can be solved, so that the phenomenon that the distance between the first pole piece and the second pole piece is increased due to curling and warping is avoided, the transmission distance of lithium ions is reduced, and the transmission efficiency of the lithium ions is improved. According to the present invention, the lithium precipitation problem of the battery cell cycle black spot is reduced, the cycle life of the battery is prolonged, and the adhesion between the diaphragm and the second pole piece is increased so as to reduce the deformation problem during the battery cycle and reduce the abnormal expansion in the thickness direction during the cycle so as to improve the cycle performance of the battery.

A battery cell cover plate and a battery cell, relating to the field of battery cell structures. The battery cell cover plate comprises: a plate assembly provided with mounting holes (201); and terminals (1), a position-limiting portion (13) being formed on an outer side portion of each terminal (1), wherein when the terminals (1) are correspondingly disposed at the mounting holes (201), the plate assembly is located between the position-limiting portions (13), and the plate assembly is pressed against the terminals (1) so as to seal the mounting holes (201). The battery cell cover plate can meet cell assembly requirements without the need to provide a riveting block, so that the overall structure of the battery cell cover plate is effectively reduced, thereby effectively reducing the occupied space, weight, and production cost of the battery cell cover plate. In addition, the internal resistance of the battery cell can be effectively reduced to lower the overcurrent temperature rise of the battery cell, thereby ensuring the safety performance of the battery cell when in use.

The invention provides a battery monomer structure, which comprises a naked battery cell, wherein the naked battery cell is provided with a concave part I which is concave inwards; the Mylar film is wrapped on other parts except the concave part of the naked battery cell; the shell is provided with an opening end, and the opening end of the shell is provided with a concave part II which is concave inwards; the shell is provided with an opening end, the top cover assembly is provided with an insulating plastic plate in a clamping manner, the bottom of the top cover assembly is provided with an insulating plastic plate in a clamping manner, the top cover assembly is arranged at the opening end of the shell in a covering manner, and the shell and the top cover assembly are enclosed to form a containing space. The top cover plate and the naked battery cell are insulated through the lower plastic, the bent position of the tab and the shell are insulated through the plastic clamping plate, the safety of the battery cell is protected, the battery pole is concave inwards to improve the space utilization rate of the battery, meanwhile, the resistance is reduced by reducing the current passing path, namely, the internal resistance is reduced to reduce the self heat release of the battery, and the temperature rise of the battery is reduced.

To provide a lead with an insulating resin film with which, when applied to a battery, it is possible to eject a gas generated in a region sealed by the outer packaging of the battery to the outside of the region sealed by the outer packaging.SOLUTION: Provided is a lead with an insulating resin film comprising a conductor and an insulating resin film, wherein, when an axis extending along two sides facing each other is defined as an axis X and an axis crossing the axis X is defined as an axis Y with the conductor viewed from above, the insulating resin film is disposed so as to cover the conductor crossing it along the axis X and not to cover both ends of the conductor that are along the axis Y so as to extend off both ends of the conductor and overlap. The insulating resin film has a first layer being in contact with the conductor, and a second layer. The second layer includes a base resin composed primarily of polypropylene, and one or more kinds of additive component selected from a rubber component and an elastomer component. The melting point of the base resin is 110°C to 130°C inclusive, and the softening point of the additive component is 130°C or below. The second layer contains 10 mass% to 40 mass% inclusive of the additive component.SELECTED DRAWING: Figure 3A

The utility model relates to a pole structure, a top cover assembly, a battery monomer, a battery and a power utilization device, and relates to the technical field of batteries, the pole structure comprises a mounting carrier, a pole, a fixing ring and a sealing member, the mounting carrier is provided with a mounting hole, and the mounting carrier comprises a first abutting wall; the pole comprises a first metal layer and a second metal layer which are stacked, and the first metal layer at least comprises a first step surface; the fixing ring sleeves the peripheral wall of the second metal layer and comprises a first end wall; the sealing element sleeves the peripheral wall of the first metal layer; the sealing piece comprises a first sealing wall and a second sealing wall which are oppositely arranged, the first sealing wall abuts against the first abutting wall, and the second sealing wall abuts against the first step face and the first end wall. According to the pole structure, the top cover assembly, the battery monomer, the battery and the electric device, under the condition of ensuring good sealing performance, the material consumption of the composite metal body is reduced, and the production cost is effectively reduced.

The invention discloses a secondary battery and electric equipment, the secondary battery comprises a shell and an electrode assembly, the electrode assembly is accommodated in the shell, the shell comprises a shell body and a shell cover, and the shell cover comprises a first edge and a second edge adjacent to the first edge. The shell cover is provided with a groove at least comprising a first groove section and a second groove section, and the first groove section and the second groove section are in a curve shape when observed in the thickness direction of the shell cover. The first groove section comprises a first end connected with the second groove section and a second end serving as the tail end of the groove, the first groove section extends in the direction away from the second edge, and the first groove section is parallel to the first edge or gradually away from the first edge in the extending direction from the first end to the second end. And when the internal pressure of the secondary battery is too high, the groove can be broken for pressure relief and air exhaust, so that the risk that the secondary battery catches fire and explodes is reduced. And the first groove section can guide cracks of the groove, so that the possibility that the shell cover is exploded along with the groove is reduced, and the safety of the secondary battery is improved.

The utility model discloses a secondary battery top cover. Comprising a cover plate, an isolation piece, a conductive block, a pole and a sealing piece, wherein a pole hole is formed in the cover plate in a penetrating manner; the isolation piece is arranged on the surface of the cover plate and is provided with a pole via hole corresponding to the pole hole; the conductive block is arranged in the isolation piece; a riveting groove which does not upwards penetrate through the conductive block is upwards formed in the conductive block from the bottom surface, a riveting part which is riveted and fixed with the riveting groove is arranged at the top of the pole, and the riveting groove comprises a riveting flange which is formed by extending from the periphery of the riveting groove along the radial inner side and at least covers part of the riveting groove; the riveting part comprises a riveting convex edge which extends into the riveting groove and is at least partially located on the upper side of the riveting flange. The utility model also comprises a secondary battery.

A battery cell and a battery having same, and an electric device. The battery cell comprises: a housing, which comprises a mounting wall; an electrode assembly, which is arranged in the housing; an explosion-proof valve, which is arranged on the mounting wall; and an air guide part, which comprises an air guide groove formed in the mounting wall, wherein the air guide groove is configured to guide to the explosion-proof valve a gas generated by the electrode assembly. In the technical solutions of the embodiments of the present application, the air in the housing can be guided to flow to the explosion-proof valve, and by means of providing the air guide groove in the mounting wall, an increase in the exhaust efficiency of the battery cell is facilitated, thus increasing the pressure relief efficiency of the battery cell. Compared with the separate provision of an air guide assembly in the battery cell, providing the air guide groove in the mounting wall to form the air guide part facilitates a reduction in the space in the battery cell that is occupied by the air guide part.

The invention discloses a battery monomer, a preparation method thereof, a battery and a power utilization device. The battery cell comprises: a housing provided with a pole; the electrode assembly is arranged in the shell and comprises an active material coating part and a tab, and the tab is connected with the pole in a welding manner to form a welding mark; the welding mark comprises a first welding seam and a second welding seam, the second welding seam is located on one side of the width direction of the first welding seam and partially overlaps with the first welding seam, and the maximum thickness of the first welding seam is smaller than that of the second welding seam. In the technical scheme of the embodiment of the invention, the first welding seam is formed on one side of the width direction of the second welding seam, so that on one hand, the first welding seam can be used for effectively reducing the probability of welding cracks of multiple layers of tab pieces of the tab and reducing overcurrent temperature rise, thereby reducing the probability of thermal runaway of the electrode assembly due to excessive temperature rise; and on the other hand, the anti-stripping strength of the welding marks on the tabs can be increased, and the reliability of the single battery is remarkably improved.

A battery top cover and a battery, relating to the technical field of batteries. The battery top cover comprises a cover plate (1), a post assembly (3) and a lower plastic piece (2). The cover plate (1) is provided with a first mounting hole (11). The lower plastic piece (2) is provided with a second mounting hole (21). The first mounting hole (11) and the second mounting hole (21) are correspondingly arranged. The post assembly (3) is arranged in the first mounting hole (11), and the lower end of the post assembly (3) extends into the second mounting hole (21). The post assembly (3) comprises a support ring (31) and a post (32). The support ring (31) is fixedly provided in the first mounting hole (11). The post (32) comprises a substrate (320). A first end face of the substrate (320) is provided with a first boss (321). The diameter of the first boss (321) is smaller than the diameter of the substrate (320). The substrate (320) is arranged in the support ring (31). The upper surface of the substrate (320) is flush with the upper surface of the support ring (31). The thickness of the post (32) in the axial direction is greater than the thickness of the support ring (31). By means of the described structure, a positive electrode riveting block and a negative electrode riveting block are omitted, and the number of parts is reduced, such that the weight of the whole cover plate is reduced. The component cost is reduced, and the assembly process is simplified. The height of the post (32) is reduced, the occupied space is reduced, and the energy density of the battery can be improved.

The utility model relates to the technical field of batteries, and provides a battery and a battery device, and the battery comprises a battery shell which comprises a cover plate and a shell part; the pole assembly is arranged on the cover plate, and at least part of the pole assembly is located on the outer side of the cover plate; the insulation sleeve covers the outer surface of the pole assembly, and at least part of the insulation sleeve is located on the outer side of the cover plate; the insulating coating covers at least part of the cover plate, and the insulating coating is located on the outer side of the cover plate; wherein the insulation sleeve covers at least part of the insulation coating, the coincident area of the orthographic projection of the insulation sleeve on the cover plate and the insulation coating is S1, the area enclosed by the circumferential outer edge of the cover plate is S2, and S1 / S2 is 0.2%-10%, so that reliable insulation protection of the insulation sleeve on the pole assembly can be ensured, and the coincident area of the insulation sleeve and the insulation coating can be ensured not to be too large; therefore, the overall heat dissipation performance of the battery shell is ensured, and the safe use performance of the battery device can be effectively improved.

The embodiment of the utility model provides an insulating part for coating a battery cell, an electrode assembly, a battery monomer, a battery and a power utilization device, and the insulating part comprises a middle folding sheet which is provided with a positioning hole; the first folding sheet is connected with the middle folding sheet at a first folding line, and the first folding sheet comprises a first main folding sheet and a side folding sheet connected with the first main folding sheet at a third folding line; the extension sheet is connected to one end, close to the middle folding sheet, of the side folding sheet at the fourth folding line; the second folding sheet is connected with the middle folding sheet at a second folding line; wherein the middle folding sheet is configured to cover the bottom of the battery cell, the first folding sheet and the second folding sheet are configured to cover the circumferential side part of the battery cell after being folded, and the extension sheet is configured to completely cover the positioning hole. The insulating part can prevent the battery cell from being in contact with the shell and can receive active substances falling from the pole piece of the battery cell, so that electrochemical corrosion of the shell is avoided.

The invention provides a battery monomer, a battery and a power utilization device, and belongs to the technical field of batteries. The single battery comprises a first shell wall, a pole and an insulation sealing structure, a mounting hole is formed in the first shell wall, and the pole comprises a penetrating part penetrating through the mounting hole and a first extending part which is connected with the penetrating part and extends in the direction away from the central axis of the mounting hole relative to the penetrating part; the first extension part extends to the outer side of the outer surface or the inner side of the inner surface of the first shell wall, the insulation sealing structure is matched between the pole and the first shell wall, and the first extension part comprises a first section part and a second section part which are sequentially arranged in the direction away from the central axis of the mounting hole; and the second section part has a large compression degree on the insulation sealing structure relative to the first section part. According to the battery monomer, the sealing reliability of the insulation sealing structure is improved, and the reliability of the battery monomer is improved.

The utility model relates to the technical field of batteries, and discloses a cover plate structure and a battery cell, the cover plate structure comprises: a cover plate body, which is provided with two spaced welding through holes, each welding through hole is suitable for corresponding to a partial area on a connecting sheet and a group of tabs, and the thickness of the cover plate body is T0; the two poles are arranged on the cover plate body and penetrate through the cover plate body; each sealing plate is arranged in the corresponding welding through hole in a covering mode so as to seal the corresponding welding through hole, a clamping groove is formed in the lower side of each sealing plate, the thickness of each sealing plate is T1, and T1 / T0 is larger than or equal to 0.6 and smaller than or equal to 1; and each insulating part is arranged on the lower side of the corresponding sealing plate, each insulating part is provided with a buckle corresponding to the corresponding clamping groove, and the buckles are matched with the clamping grooves in a clamped mode. The welding through holes are convenient for welding equipment to weld the tabs and the connecting pieces, poor welding is avoided, the sealing plate covers the welding through holes to ensure the sealing performance, the insulating part is clamped and matched with the sealing plate, and the reliability is high.

The present invention relates to a high-stability magnetic storage battery, comprising a battery inner cavity shell (9), a positive electrode current collector (8), a negative electrode current collector (12), a battery separator (6), and an outer shell cover plate (5). The battery inner cavity shell (9) is filled with an electrolyte (10), the positive electrode current collector (8) and the negative electrode current collector (12) are arranged on the inner wall of the battery inner cavity shell (9) relative to each other, the outer wall of the battery inner cavity shell (9) is provided with one or more magnets, and the electrolyte (10) contains a negative electrode active material (11A) and a positive electrode active material (11B). Compared with the prior art, the battery of the present invention has the advantages of improving the structural stability of the electrode material, improving the performance of the electrode and the electrolyte, and extending the service life of the storage battery.

The utility model provides an anti-twist top cover for a secondary battery, which is characterized in that a turnover ring is arranged on the surface of a top cover sheet, and the turnover ring is turned over towards a pole component and is used for preventing the pole component from moving upwards; a through hole and a limiting groove are formed in the surface of the pin, the pin is connected to the bottom of the pole assembly in a clamped mode, a limiting block for preventing the pin from twisting is arranged on the side edge of the bottom of the lower plastic, and a positioning column matched with the limiting groove is arranged on the surface of the bottom of the lower plastic; according to the utility model, the pole component is fixed on the mounting hole through the folding ring, the through hole on the pin is sleeved at the bottom of the pole, the positioning column and the limiting blocks are arranged on the lower plastic, the pin is assembled at the bottom of the lower plastic and sleeved on the pole, and the limiting blocks and the positioning column on the left and right sides form a triangular structure. The pins are limited by the positioning columns and the limiting blocks on the two sides, so that the pins are effectively prevented from twisting, and the safety and reliability of the battery are improved.

The invention provides a battery monomer, a battery, a power utilization device, an ultrasonic welding head and an ultrasonic welding device, and belongs to the technical field of batteries. Wherein the battery monomer comprises a shell, a pole and an electrode assembly, the pole is arranged in the shell, the electrode assembly comprises an active material coating part arranged in the shell and a tab part electrically connected with the active material coating part and the pole, the tab part comprises a plurality of tab pieces, and the plurality of tab pieces are stacked and connected to form a furling part; the furling part is provided with a first area and a second area, the compaction degree of the plurality of tab pieces in the first area is greater than that of the plurality of tab pieces in the second area, a connecting part is formed at the position, used for being electrically connected with the pole column, of the furling part, and at least part of the edge of the connecting part on the furling part falls in the first area. According to the battery monomer, the problem of cracks on the edge of the connecting part can be improved, the conductive yield and the connecting strength of the tab part and the pole are improved, and the reliability of the battery monomer is improved.

A battery pack comprising a frame and two or more battery cells installed to the frame. The two or more battery cells are interconnected by a rotatable connector which is configured to enable electrical connections between the two or more battery cells. The rotatable connector is adapted to be switched between at least a first rotational position in which the two or more battery cells being electrically connected, and a second rotational position, in which the two or more battery cells being not electrically connected. When the user actuates the knob on the battery pack, the connecting terminals change their rotational positions from a non-conducting position to a conducting position, thereby enabling the electrical connections between the groups of battery cells.

The utility model provides a battery monomer, a battery device and a power utilization device, and belongs to the technical field of batteries. The battery monomer comprises a shell, an electrode assembly, an electrode terminal, a fixing piece and a first insulating piece, the electrode assembly is housed within the housing. The electrode terminal is disposed on a wall portion of the housing and is electrically connected to the electrode assembly. The fixing piece is arranged on the peripheral side of the electrode terminal, the fixing piece comprises a base part and a limiting part, the base part is connected to the wall part, the limiting part is connected to the base part and extends in the direction close to the electrode terminal, and the limiting part is configured to limit the electrode terminal to move in the direction away from the electrode assembly in the thickness direction of the wall part. And at least part of the first insulating part is arranged between the electrode terminal and the limiting part. The thickness of the limiting part is smaller than that of the base part. Therefore, the space for accommodating the first insulating part between the limiting part and the electrode terminal can be enlarged while the connection strength requirement of the base part and the wall part of the fixing part is met, so that the creepage distance between the limiting part and the electrode terminal can be increased.

A secondary battery, an electronic device, and a method for manufacturing a secondary battery. The battery comprises a housing, an electrode assembly, a cover plate and a current collector member; one side of the housing is an opening side, and the other side opposite to said side of the housing is a closed side; the housing comprises a first cylinder and a second cylinder which are arranged in a segmented manner; one end of the first cylinder is provided with an end wall to form the closed side, and the other end of the first cylinder comprises a first connecting segment; one end of the second cylinder is provided with an opening to form the opening side, and the other end of the second cylinder comprises a second connecting segment; the second connecting segment is fixedly connected to the first connecting segment; a roll groove recessed inwards is formed in the second cylinder in a surrounding manner; the electrode assembly is accommodated in the housing; the cover plate is sealedly mounted at the opening; the current collector member is arranged between the electrode assembly and the cover plate and comprises a tab connecting portion and a housing connecting portion; the tab connecting portion is electrically connected to a tab; and the case connecting portion is electrically connected to the second cylinder. The battery structure can solve the technical problem of the falling of welding slag onto the housing during the welding of the current collector member to the housing.

The single battery comprises a shell, end covers, a pole group and tabs connected to the two ends of the pole group, the pole group and the end covers are both located in the shell, the end covers are located at the two ends of the pole group, the tabs penetrate through the end covers, the end covers comprise the first end cover and the second end cover, and the first end cover and the second end cover are connected. A containing cavity is defined between the first end cover and the second end cover, and the tab is located in the containing cavity. According to the single battery disclosed by the utility model, the end covers are arranged at the two ends of the pole group, the tabs penetrate through the end covers, each end cover consists of the first end cover and the second end cover which are connected, and the first end cover and the second end cover can be used for isolating the contact between the tabs and the shell and preventing the short circuit of the single battery; and the processing mode and the assembling mode of the end cover are simple.

The utility model provides a liquid cooling module which is characterized in that a plurality of cells are arranged in parallel to form a battery pack, end plates are respectively arranged at two ends of the battery pack, a positive pole and a negative pole are arranged at the top of each cell, a plurality of busbars are arranged on the battery pack, and the positive pole and the negative pole of each cell are respectively connected by the busbars. The liquid cooling plate is arranged at the top of the battery cell and located between the positive pole and the negative pole, and the heat conduction structural adhesive is arranged between the liquid cooling plate and the top of the battery pack; the liquid cooling plate is arranged between the positive pole and the negative pole by fully utilizing the protruding heights of the positive pole and the negative pole, so that the space occupied by the liquid cooling plate in height is reduced, and the space utilization rate is improved; the liquid cooling plate is integrated on the battery module, so that the material of the liquid cooling plate is reduced, and the cost is reduced; the liquid cooling plate is arranged at the top of the battery cell, so that the risks of poor insulation, short circuit and the like caused by liquid cooling plate breakage due to bottom collision of the battery pack are reduced, and the safety of the battery pack is improved.

The utility model provides a negative pole and a battery cover plate, and relates to the technical field of energy storage components. The negative pole comprises an aluminum main body part, a copper extension part and an upper insulation sealing piece; the copper extension part is arranged at the bottom of the aluminum main body part; the bottom of the copper extension part is provided with an insulation connection step, and the insulation connection step is provided with a reinforcing connection ring groove. The upper insulation sealing piece covers the aluminum main body part, and the upper insulation sealing piece is provided with a connecting ring matched with the reinforcing connecting ring groove. The battery cover plate comprises a cover plate, a positive pole, a lower insulation sealing piece and a negative pole; the negative pole and the positive pole are both arranged on the cover plate, and upper insulation sealing pieces are arranged between the negative pole and the cover plate and between the positive pole and the cover plate; the lower insulation sealing piece is arranged at the bottom of the cover plate. The technical effect of reducing the sealing failure probability of the negative pole is achieved.