Battery pack and electric device

Abstract

The embodiment of the utility model provides a battery pack and an electric device, and relates to the technical field of batteries. The battery pack comprises a plurality of battery modules, a lead-out pole piece and a connecting bar; the plurality of battery modules are arranged side by side; the leading-out pole piece comprises a positive pole leading-out pole piece and a negative pole leading-out pole piece, the positive pole leading-out pole piece is connected to a positive pole column of the battery module, and the negative pole leading-out pole piece is connected to a negative pole column of the battery module; the connecting row is arranged between two adjacent battery modules, one end of the connecting row is welded or riveted with the positive electrode leading-out pole piece of one battery module, and the other end of the connecting row is welded or riveted with the negative electrode leading-out pole piece of the other battery module. Compared with a threaded connection mode in the prior art, the connection bar and the leading-out pole piece are connected in a welding or riveting mode, so that the connection bar and the leading-out pole piece are connected more quickly, and the production efficiency of the battery pack is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of batteries, and in particular, to a battery pack and an electrical device. Background Art

[0002] The battery pack includes a box body and multiple groups of battery modules. The box body includes an upper box body and a bottom guard plate. The upper box body includes a plurality of cross beams and a plurality of longitudinal beams. The cross beam refers to the beam in the width direction of the battery pack. The longitudinal beam refers to the beam in the length direction of the battery pack.

[0003] Multiple groups of battery modules are installed in the upper box body and arranged along the width direction of the battery pack. Among them, when installing multiple groups of battery modules in the upper box body, first invert the upper box body, install the battery modules in the upper box body, and then right the upper box body. The cross beam limits the battery module in the length direction of the battery pack.

[0004] In the battery pack with the above structure, the lead-out pole tabs in two adjacent battery modules are electrically connected by a copper connecting piece on one side of the cross beam. One end of the connecting piece is connected to the positive lead-out pole tab of one group of battery modules, and the other end of the connecting piece is connected to the negative lead-out pole tab of another group of battery modules.

[0005] In the related art, the connection efficiency between the connecting piece and the positive lead-out pole tab, and between the connecting piece and the negative lead-out pole tab is relatively low, resulting in a relatively low production efficiency of the battery pack. Summary of the Utility Model

[0006] In view of the above problems, the embodiments of the present application provide a battery pack and an electrical device, which improve the production efficiency of the battery pack.

[0007] According to one aspect of the embodiments of the present application, a battery pack is provided. The battery pack includes a plurality of battery modules, lead-out pole tabs, and connection rows; the plurality of battery modules are arranged side by side; the lead-out pole tabs include positive lead-out pole tabs and negative lead-out pole tabs, the positive lead-out pole tabs are connected to the positive pole columns of the battery modules, and the negative lead-out pole tabs are connected to the negative pole columns of the battery modules; the connection rows are arranged between two adjacent battery modules, one end of the connection row is welded or riveted to the positive lead-out pole tab of one battery module, and the other end of the connection row is welded or riveted to the negative lead-out pole tab of another battery module.

[0008] One end of the connecting row is welded or riveted to the positive electrode lead tab of a battery module, and the other end of the connecting row is welded or riveted to the negative electrode lead tab of another battery module, so that the connecting row can realize the electrical connection of two adjacent battery modules. And compared with the threaded connection method in the related art, the connecting row in the present application is welded or riveted to the lead tab, making the connection between the connecting row and the lead tab faster, which is beneficial to improving the production efficiency of the battery pack. In addition, by using the welding method to connect the connecting row and the lead tab, the contact area between the connecting row and the lead tab is larger, the contact is more reliable, the contact resistance is smaller, and the number of parts is reduced, eliminating the step of connecting screws in the subsequent process.

[0009] In some embodiments, the connecting row is provided with a first positioning groove and a second positioning groove. The positive electrode lead tab is located in the first positioning groove, and the negative electrode lead tab is located in the second positioning groove.

[0010] By adopting the above scheme, the first positioning groove can limit the matching position between the positive electrode lead tab and the connecting row, which is beneficial to realizing the quick installation and connection between the positive electrode lead tab and the connecting row. And the groove wall of the first positioning groove can limit the position of the positive electrode lead tab after the connection between the positive electrode lead tab and the connecting row, reducing or even limiting the displacement of the positive electrode lead tab, and preventing the connection between the positive electrode lead tab and the connecting row from loosening or disconnecting. The second positioning groove can limit the matching position between the negative electrode lead tab and the connecting row, which is beneficial to realizing the quick installation and connection between the negative electrode lead tab and the connecting row. And the groove wall of the second positioning groove can limit the position of the negative electrode lead tab after the connection between the negative electrode lead tab and the connecting row, reducing or even limiting the displacement of the negative electrode lead tab, and preventing the connection between the negative electrode lead tab and the connecting row from loosening or disconnecting.

[0011] In some embodiments, the battery pack further includes a cross beam. The cross beam is arranged at one end of the battery module. The connecting row and the lead tab are arranged on one side of the cross beam, and the cross beam is connected to the connecting row.

[0012] By adopting the above scheme, the cross beam is arranged at one end of the battery module, which can limit the position of the battery module. The connecting row is connected to the cross beam, and the cross beam plays a role in fixing the connecting row. Furthermore, the relative positions of the battery module, the cross beam, the connecting row and the lead tab are fixed, and the electrical performance of the battery pack is more stable.

[0013] In some embodiments, the connecting row is connected to the cross beam by snap connection or tying with a cable tie.

[0014] By adopting the snap connection or tying with a cable tie, the connection method between the connecting row and the cross beam is simpler, the operation is convenient, and the cost is lower.

[0015] In some embodiments, the battery pack further includes an insulating member disposed between the connection row and the battery module, and / or the insulating member is disposed between the connection row and the crossbeam.

[0016] By adopting the above solution, the setting of the insulating member can achieve insulation isolation between the connection row and the battery cell or between the connection row and the crossbeam, reducing the probability of short circuit between battery modules or between the battery module and the crossbeam.

[0017] In some embodiments, the part of the connection row for welding or riveting with the lead-out pole tab is the transfer area; the insulating member includes an insulating film disposed on the surface of the connection row except the transfer area.

[0018] By adopting the above solution, using the insulating film to wrap the connection row has low cost and convenient operation, and the insulating film can comprehensively wrap the connection row on the basis of conforming to the shape of the connection row, with relatively comprehensive insulation protection and strong ability to adapt to the shape of the connection row. In addition, the setting of the insulating film will not cause too much increase in the local volume of the battery pack, which is beneficial to the compact and lightweight design of the battery pack.

[0019] In some embodiments, the insulating member further includes an insulating base disposed between the transfer area and the crossbeam.

[0020] The transfer area is not wrapped by the insulating film. An insulating base is provided between the transfer area and the crossbeam, and the insulating base can insulate and isolate the transfer area and the crossbeam, preventing short circuit and unstable circuit connection in the area that cannot be wrapped by the insulating film.

[0021] In some embodiments, the insulating base is provided with a first installation groove and a second installation groove. The transfer area of one connection row for welding or riveting with the positive lead-out pole tab is disposed in the first installation groove, and the transfer area of the other connection row for welding or riveting with the negative lead-out pole tab is disposed in the second installation groove.

[0022] By adopting the above solution, the insulating base not only plays the role of insulation isolation, but also can play the role of positioning the connection row, reducing the displacement of the connection row and reducing the probability of failure of the welding or riveting structure between the lead-out pole tab and the connection row due to the displacement of the connection row.

[0023] According to another aspect of the embodiments of the present application, an electrical device is provided, including the battery pack in any of the above embodiments.

[0024] In the embodiments of the present application, one end of the connection row is welded or riveted to the positive lead-out pole tab of one battery module, and the other end of the connection row is welded or riveted to the negative lead-out pole tab of another battery module, making the connection between the connection row and the lead-out pole tab faster, which is beneficial to improving the production efficiency of the battery pack.

[0025] The above description is only an overview of the technical solution of the embodiments of the present application. In order to better understand the technical means of the embodiments of the present application, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features, and advantages of the embodiments of the present application more obvious and understandable, the following specifically illustrates the specific implementation manners of the present application. Brief Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 It is a schematic structural diagram of the battery pack provided by the embodiment of the present application.

[0028] Figure 2 It is Figure 1 an enlarged view of part A in

[0029] Figure 3 It is a schematic structural diagram of the welding of the connection row and the lead-out pole tab.

[0030] Figure 4 It is a schematic structural diagram of the riveting of the connection row and the lead-out pole tab.

[0031] Figure 5 It is an exploded structural diagram of the connection row and the lead-out pole tab.

[0032] Description of the reference numerals: 100, battery module; 200, lead-out pole tab; 210, positive lead-out pole tab; 220, negative lead-out pole tab; 300, connection row; 310, first positioning groove; 320, second positioning groove; 330, transition area; 400, cross beam; 500, insulating part; 510, insulating film; 520, insulating base; 521, first installation groove; 522, second installation groove; 600, rivet. Detailed Description of the Embodiments

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present application.

[0034] 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 application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0035] The terms "comprising" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover but not exclude other elements. The word "a" or "an" does not exclude the presence of a plurality.

[0036] Reference to "an embodiment" herein means that a particular feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase "an embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0037] The term "and / or" herein is merely a description of the relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0038] The orientation terms appearing in the following description are the directions shown in the figures and do not limit the specific structure of the battery pack or electrical device of this application. For example, in the description of this application, terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of this application.

[0039] In addition, expressions indicating directions such as the X direction, Y direction, and Z direction used to describe the operation and structure of the components of the battery pack or electrical device of this embodiment are not absolute but relative. Although these indications are appropriate when the components of the battery pack or electrical device are in the positions shown in the figures, when these positions change, these directions should have different interpretations to correspond to the change.

[0040] In addition, the terms "first", "second", etc. in the description and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order, and may explicitly or implicitly include one or more of such features.

[0041] In the description of this application, unless otherwise specified, the meaning of "a plurality of" refers to two or more (including two). Similarly, "a plurality of groups" refers to two or more groups (including two groups).

[0042] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, the "connection" or "coupling" of a mechanical structure may refer to a physical connection. For example, a physical connection may be a fixed connection, such as a fixed connection through a fixing member, such as a screw, bolt, or other fixing member; a physical connection may also be a detachable connection, such as a snap connection or a snap-fit connection; a physical connection may also be an integral connection, such as a welded, bonded, or integrally formed connection. The "connection" or "coupling" of a circuit structure may refer to not only a physical connection but also an electrical connection or a signal connection. For example, it may be a direct connection, that is, a physical connection, or it may be indirectly connected through at least one intermediate element, as long as the circuit is connected, and it may also be the connection inside two elements; a signal connection may refer to not only a signal connection through a circuit but also a signal connection through a media medium, such as radio waves. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] An embodiment of this application provides a battery pack and an electrical device. The above-mentioned electrical device includes the above-mentioned battery pack, and the above-mentioned battery pack can provide electrical energy for the electrical device.

[0044] Among them, the above-mentioned electrical device may be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, an energy storage device, a amusement device, an elevator, and a lifting device, etc. The vehicle may be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc.; the spacecraft includes an airplane, a rocket, a space shuttle, and a spaceship, etc.; the electric toy includes a fixed or mobile electric toy, such as a game console, an electric vehicle toy, an electric ship toy, or an electric airplane toy, etc.; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, a hammer drill, an impact drill, a concrete vibrator, and a planer, etc.; the energy storage device may be an energy storage wall, a base station energy storage, a container energy storage, etc.; the amusement device may be a carousel, a drop tower, etc. This application does not impose special restrictions on the above-mentioned electrical device.

[0045] For new energy vehicles, the above battery pack can be used as a driving power source to replace fossil fuels and provide driving power.

[0046] Specifically, the battery pack includes a battery management system (BMS) and multiple above-mentioned battery cells. The multiple battery cells can be electrically connected in series, in parallel, or in a hybrid manner of series and parallel, and communicate with the battery management system to form a battery pack. The above battery management system controls and monitors the working states of the respective battery cells. In addition, the multiple battery cells can also be first connected in series and / or in parallel and form a battery module with a module management system, and then multiple battery modules are electrically connected in series, in parallel, or in a hybrid manner of series and parallel, and jointly constitute a battery pack with the battery management system.

[0047] Among them, the multiple battery cells in the above battery pack or battery module can be installed on a support structure such as a box body, a frame, or a bracket, and can be electrically connected through a current collecting component such as a bus bar between the respective battery cells and between the battery cells and the battery management system. The above battery cells can be lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, and their outer contours can be cylindrical, flat, cuboid, or other shapes, but are not limited thereto.

[0048] Generally, a battery cell includes a battery cell housing and an electrode assembly, and the electrode assembly is accommodated in the battery cell housing. The electrode assembly is the smallest unit for electrochemical reactions in the battery to achieve charge and discharge of the battery cell, and generally includes a positive electrode plate, a negative electrode plate, and a separator that separates the positive electrode plate and the negative electrode plate. An electrolyte is injected into the battery cell housing, and the electrolyte can infiltrate into the interior of the electrode assembly to provide an ion migration path for the electrode assembly to conduct electrochemical reactions and play a role in conducting electricity.

[0049] In the related art, after multiple battery cells are electrically connected to form a battery module, each battery module has a positive electrode lead-out bus bar and a negative electrode lead-out bus bar. The positive electrode lead-out bus bar is equivalent to the total positive of the battery module, and the negative electrode lead-out bus bar is equivalent to the total negative of the battery module. Different battery modules are connected through a connecting row. One end of the connecting row is connected to the positive electrode lead-out bus bar of one battery module, and the other end is connected to the negative electrode lead-out bus bar of another battery module. The connecting row is connected to the positive electrode lead-out bus bar and the connecting row is connected to the negative electrode lead-out bus bar through bolts. The connection efficiency of the bolt connection is low, and its connection structure sometimes loosens, resulting in the inability to guarantee the electrical connection stability of adjacent battery modules.

[0050] In view of the above problems, the embodiments of the present application provide a battery pack and an electrical device using the same. Figure 1 Schematic diagram of the structure of the battery pack provided by the embodiment of the present application. Figure 2 For Figure 1 Enlarged view of part A in Figure 3Schematic diagram of the structure for welding the connection row and the lead-out electrode tab. Figure 4 Schematic diagram of the structure for riveting the connection row and the lead-out electrode tab.

[0051] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The battery pack includes a plurality of battery modules 100, lead-out electrode tabs 200, and connection rows 300; the plurality of battery modules 100 are arranged side by side; the lead-out electrode tabs 200 include a positive lead-out electrode tab 210 and a negative lead-out electrode tab 220, the positive lead-out electrode tab 210 is connected to the positive electrode post of the battery module 100, and the negative lead-out electrode tab 220 is connected to the negative electrode post of the battery module 100; the connection row 300 is disposed between two adjacent battery modules 100, one end of the connection row 300 is welded or riveted to the positive lead-out electrode tab 210 of one battery module 100, and the other end of the connection row 300 is welded or riveted to the negative lead-out electrode tab 220 of another battery module 100.

[0052] The lead-out electrode tab 200 can be a metal thin sheet, usually a copper sheet or an aluminum sheet. Exemplarily, the positive lead-out electrode tab 210 is an aluminum sheet, and the negative lead-out electrode tab 220 is a copper sheet.

[0053] The connection row 300 is a conductive metal plate. For example, the connection row 300 can be a copper row.

[0054] The welding method between the connection row 300 and the lead-out electrode tab 200 can be pressure welding, laser welding, ultrasonic welding, resistance welding, etc., and the embodiments of the present application do not limit this.

[0055] As Figure 4 shown, the riveting method between the connection row 300 and the lead-out electrode tab 200 can be that a first connection hole is provided on the lead-out electrode tab 200, a second connection hole is provided on the connection row 300, a rivet 600 is passed through the first connection hole and the second connection hole, so that the head of the rivet 600 is close to the surface of the lead-out electrode tab 200 or the connection row 300, and then one end of the rod of the rivet 600 is upset to form a riveting head, so that the lead-out electrode tab 200 and the connection row 300 are clamped between the head of the rivet 600 and the riveting head.

[0056] In the above riveting method, a coating can be provided on the surface of the rivet 600. For example, galvanized or nickel-plated, so as to increase the corrosion resistance of the rivet 600.

[0057] One end of the connection row 300 is welded or riveted to the positive electrode lead tab 210 of a battery module 100, and the other end of the connection row 300 is welded or riveted to the negative electrode lead tab 220 of another battery module 100, so that the connection row 300 can realize the electrical connection of two adjacent battery modules 100. Compared with the threaded connection method in the related art, the connection row 300 in the present application is welded or riveted to the lead tab 200, making the connection between the connection row 300 and the lead tab 200 faster, which is beneficial to improving the production efficiency of the battery pack.

[0058] In addition, by using the welding method to connect the connection row 300 and the lead tab 200, the contact area between the connection row 300 and the lead tab 200 is larger, the contact is more reliable, the contact resistance is smaller, and the number of parts is reduced, eliminating the step of connecting screws in the subsequent process.

[0059] Figure 5 It is an explosion structure schematic diagram of the connection row and the lead tab. Figure 5 As shown, in some embodiments, the connection row 300 is provided with a first positioning groove 310 and a second positioning groove 320. The positive electrode lead tab 210 is located in the first positioning groove 310, and the negative electrode lead tab 220 is located in the second positioning groove 320.

[0060] The first positioning groove 310 and the second positioning groove 320 can be formed by bending the connection row 300. For example, the connection row 300 extends in the first direction, and both ends of the connection row 300 are bent to one side of the connection row 300 to form a groove-like structure, which are the first positioning groove 310 and the second positioning groove 320 respectively.

[0061] It can be understood that the width of the first positioning groove 310 is greater than or equal to the width of the positive electrode lead tab 210, and the width of the second positioning groove 320 is greater than or equal to the width of the negative electrode lead tab 220.

[0062] The first positioning groove 310 can limit the mating position of the positive electrode lead tab 210 and the connection row 300, which is beneficial to realizing the quick installation and connection of the positive electrode lead tab 210 and the connection row 300. Moreover, the groove wall of the first positioning groove 310 can limit the position of the positive electrode lead tab 210 after the positive electrode lead tab 210 is connected to the connection row 300, reducing or even limiting the displacement of the positive electrode lead tab 210 and preventing the connection between the positive electrode lead tab 210 and the connection row 300 from loosening or disconnecting.

[0063] The second positioning groove 320 can define the mating position of the negative electrode lead tab 220 and the connection row 300, which is conducive to realizing the quick installation and connection of the negative electrode lead tab 220 and the connection row 300. Moreover, the groove wall of the second positioning groove 320 can limit the position of the negative electrode lead tab 220 after the negative electrode lead tab 220 and the connection row 300 are connected, reduce or even limit the displacement of the negative electrode lead tab 220, and prevent the connection between the negative electrode lead tab 220 and the connection row 300 from loosening or disconnecting.

[0064] As Figure 1 and Figure 2 shown, in some embodiments, the battery pack further includes a cross beam 400. The cross beam 400 is disposed at one end of the battery module 100. The connection row 300 and the lead tab 200 are disposed on one side of the cross beam 400, and the cross beam 400 is connected to the connection row 300.

[0065] The cross beam 400 can be a metal plate, such as a plate-like structure made of steel. Among them, reinforcing ribs can be provided on one side of the cross beam 400 to increase the strength of the cross beam 400 and prevent the cross beam 400 from breaking due to the expansion of the battery cells during the use of the battery pack.

[0066] The cross beam 400 is disposed at one end of the battery module 100, which can define the position of the battery module 100 and make the structure of the battery pack more stable.

[0067] The connection row 300 is connected to the cross beam 400, and the cross beam 400 plays a role in fixing the connection row 300. Furthermore, the relative positions of the battery module 100, the cross beam 400, the connection row 300, and the lead tab 200 are fixed, and the electrical performance of the battery pack is also more stable.

[0068] In some embodiments, the connection row 300 is connected to the cross beam 400 by means of snap connection or tying with a cable tie.

[0069] By using the snap connection or tying with a cable tie, the connection method between the connection row 300 and the cross beam 400 is simpler, the operation is convenient, and the cost is lower.

[0070] Among them, the snap connection can be: a card slot is provided on the cross beam 400, a part of the connection row 300 is bent into a shape that can be adapted to the card slot, and when assembling the connection row 300, the part of the connection row 300 is inserted into the card slot on the cross beam 400.

[0071] The method of tying with a cable tie can be: a hole communicating with both sides of the cross beam 400 is provided on the cross beam 400, one end of the cable tie is passed through the hole, bypasses the connection row 300, and then is connected to the other end of the cable tie to realize the fixation of the connection row 300 and the cross beam 400. It is also possible not to provide a hole on the cross beam 400, but to bypass the cross beam 400 and the connection row 300 with the cable tie and then connect its two ends.

[0072] As Figure 2 shown, in some embodiments, the battery pack further includes an insulating member 500 disposed between the connection row 300 and the battery module 100, and / or the insulating member 500 is disposed between the connection row 300 and the cross beam 400.

[0073] The provision of the insulating member 500 can achieve insulation isolation between the connection row 300 and the battery cells or between the connection row 300 and the cross beam 400, reducing the probability of short circuit between battery modules 100 or between the battery module 100 and the cross beam 400.

[0074] The insulating member 500 can be made of mica, plastic, plastic parts, etc. In addition, the setting method of the insulating member 500 can be various.

[0075] As Figure 5 shown, in some embodiments, the part of the connection row 300 for welding or riveting with the lead-out pole tab 200 is the transition area 330; the insulating member 500 includes an insulating film 510, and the insulating film 510 is disposed on the surface of the connection row 300 except for the transition area 330.

[0076] The insulating film 510 can be fixed on the surface of the connection row 300 by means of heat shrinkage, spraying, pasting, etc. In addition, the insulating film 510 can be disposed on the surface of the connection row 300 after the lead-out pole tab 200 is welded or riveted to the connection row 300, and can also be disposed on the surface of the connection row 300 after the connection row 300 is connected to the lead-out pole tab 200. When the latter method is used, the insulating film 510 can simultaneously wrap the surface of the whole formed after the connection row 300 is welded or riveted to the lead-out pole tab 200, and the insulation protection effect is better.

[0077] Wrapping the connection row 300 with the insulating film 510 has a lower cost, is convenient to operate, and the insulating film 510 can wrap the connection row 300 in all directions on the basis of fitting the surface of the connection row 300 according to the different shapes of the connection row 300, and the insulation protection is relatively comprehensive, and the ability to adapt to the shape of the connection row 300 is strong.

[0078] In addition, the provision of the insulating film 510 will not cause too much increase in the local volume of the battery pack, which is beneficial to the compact and lightweight design of the battery pack.

[0079] Combined with Figure 2 and Figure 4 , in some embodiments, the insulating member 500 further includes an insulating base 520, and the insulating base 520 is disposed between the transition area 330 and the cross beam 400.

[0080] The insulating base 520 can be connected to the cross beam 400, for example, it can be screw connection, pin connection, snap connection, etc.

[0081] The insulating base 520 can also be not connected to the cross beam 400 and directly clamped between the connection row 300 and the cross beam 400.

[0082] Since the transfer area 330 is not wrapped by the insulating film 510, an insulating base 520 is arranged between the transfer area 330 and the cross beam 400. The insulating base 520 can insulate and isolate the transfer area 330 and the cross beam 400, preventing short circuits and unstable circuit connections in areas that cannot be wrapped by the insulating film 510.

[0083] In some embodiments, the insulating base 520 is provided with a first installation groove 521 and a second installation groove 522. The transfer area 330 of a connection row 300 welded or riveted to the positive electrode lead tab 210 is arranged in the first installation groove 521, and the transfer area 330 of the other connection row 300 welded or riveted to the negative electrode lead tab 220 is arranged in the second installation groove 522.

[0084] The insulating base 520 can be formed by injection molding. Both the first installation groove 521 and the second installation groove 522 are groove-shaped structures on the insulating base 520.

[0085] The first installation groove 521 and the second installation groove 522 can be arranged at symmetrical positions on the insulating base 520 or can be arranged asymmetrically. The embodiments of the present application do not limit this.

[0086] When the first positioning groove 310 and the second positioning groove 320 are arranged on the connection row 300, the first positioning groove 310 can be arranged in the first installation groove 521, the second positioning groove 320 can be arranged in the second installation groove 522, and the outer surface of the side wall of the first positioning groove 310 fits or at least partially contacts the side wall of the first installation groove 521 to realize the limit of the first installation groove 521 on the first positioning groove 310. Similarly, the outer surface of the side wall of the second positioning groove 320 fits or at least partially contacts the side wall of the second installation groove 522 to realize the limit of the second installation groove 522 on the second positioning groove 320.

[0087] Through the above installation relationship between the first positioning groove 310 and the first installation groove 521, and the second positioning groove 320 and the second installation groove 522, the insulating base 520 can also position the connection row 300, so that the relative position between the insulating base 520 and the connection row 300 is relatively fixed, and the structure of the battery pack is more stable.

[0088] Therefore, by adopting the above solution, the insulating base 520 not only plays the role of insulating isolation, but also can position the connection row 300, reduce the displacement of the connection row 300, and reduce the probability of failure of the welding or riveting structure between the lead-out pole tab 200 and the connection row 300 due to the displacement of the connection row 300.

[0089] The embodiment of the present application further provides an electrical device, including the battery pack in any of the above embodiments. The electrical performance of the power supply system of the electrical device using this battery pack is more stable.

[0090] In summary, in the embodiment of the present application, one end of the connection row 300 is welded or riveted to the positive lead-out pole tab 210 of a battery module 100, and the other end of the connection row 300 is welded or riveted to the negative lead-out pole tab 220 of another battery module 100, so that the connection between the connection row 300 and the lead-out pole tab 200 is faster, which is beneficial to improving the production efficiency of the battery pack.

[0091] Those skilled in the art can understand that although some embodiments herein include certain features included in other embodiments rather than other features, the combination of the features of different embodiments means that it is within the scope of the present application and forms different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0092] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack, characterized in that: include: A plurality of battery modules, wherein the plurality of battery modules are arranged side by side; Lead-out electrode tabs, including positive lead-out electrode tabs and negative lead-out electrode tabs, the positive lead-out electrode tabs are connected to the positive electrode posts of the battery module, and the negative lead-out electrode tabs are connected to the negative electrode posts of the battery module; A connecting row is arranged between two adjacent battery modules, one end of the connecting row is welded or riveted to the positive lead-out electrode tab of one battery module, and the other end of the connecting row is welded or riveted to the negative lead-out electrode tab of another battery module.

2. The battery pack according to claim 1, characterized in that: The connecting row is provided with a first positioning groove and a second positioning groove, the positive electrode lead-out pole piece is located in the first positioning groove, and the negative electrode lead-out pole piece is located in the second positioning groove.

3. The battery pack according to claim 1, characterized in that: It also includes a crossbeam, which is arranged at one end of the battery module, the connecting bar and the lead-out electrode sheet are arranged on one side of the crossbeam, and the crossbeam is connected to the connecting bar.

4. The battery pack according to claim 3, characterized in that: The connecting row is clamped with the cross beam or tied with a cable tie.

5. The battery pack according to claim 3, characterized in that: It also includes an insulating member, which is arranged between the connecting bar and the battery module, and / or the insulating member is arranged between the connecting bar and the crossbeam.

6. The battery pack according to claim 5, characterized in that: The portion of the connecting bar used for welding or riveting with the lead-out pole piece is a transition area; The insulating member includes an insulating film, and the insulating film is disposed on a surface of the connection bar except the transfer area.

7. The battery pack according to claim 6, characterized in that: The insulating member further comprises an insulating base, and the insulating base is arranged between the transition area and the crossbeam.

8. The battery pack according to claim 7, characterized in that: The insulating base is provided with a first mounting groove and a second mounting groove, a transition area of ​​one connecting row welded or riveted to the positive lead-out electrode piece is provided in the first mounting groove, and a transition area of ​​another connecting row welded or riveted to the negative lead-out electrode piece is provided in the second mounting groove.

9. An electrical device, characterized in that: A battery pack comprising any one of claims 1 to 8.

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