Battery and electric equipment

Abstract

The utility model provides a battery and electric equipment, the battery comprises at least two battery cells, the two battery cells are sequentially arranged along the length direction of the battery cells, each battery cell comprises a battery cell main body, and a positive tab and a negative tab which are arranged on the same side of the battery cell main body. The positive tab of one battery cell is electrically connected with the positive tab of the other battery cell, and the negative tab of one battery cell is electrically connected with the negative tab of the other battery cell, so that the heat concentration of the battery cells is reduced, the central expansion force of the battery cells is dispersed, and the service life of the battery is prolonged; meanwhile, the transmission path of electrons in each battery cell is shortened, and the transmission impedance and polarization effect are reduced, so that the power output performance of the battery cell is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery and electrical equipment. BACKGROUND

[0002] Lithium ion battery has become the mainstream product of secondary battery with high energy density and excellent cycle performance, and is widely used in portable electronic devices, electric vehicles, smart phones and spacecraft fields.

[0003] In the prior art, square batteries usually arrange multiple battery cells in parallel and closely, so that the large area side surfaces of adjacent battery cells contact each other; in the repeated charging and discharging process, the by-products (such as gas or electrolyte decomposition) generated by chemical reaction of the battery cells are usually concentrated in the central area of the battery cells, and since the central areas of adjacent battery cells are superimposed on each other, the pressure accumulation in the central area is further aggravated, resulting in a significant increase in the local swelling force of the battery cells, which adversely affects the service life of the battery. SUMMARY

[0004] The utility model embodiment provides a battery and electrical equipment to solve or at least partially solve the deficiencies in the prior art.

[0005] In one embodiment, the battery includes at least two battery cells, and the two battery cells are arranged in sequence along the length direction of the battery cells.

[0006] In the adjacent two battery cells, the positive electrode ear of one battery cell is electrically connected to the positive electrode ear of another battery cell, and the negative electrode ear of one battery cell is electrically connected to the negative electrode ear of another battery cell.

[0007] In one embodiment, the battery cell includes a first side surface and a second side surface arranged adjacent to each other, the extension direction of the first side surface is perpendicular to the length direction of the battery cell, and the extension direction of the second side surface is perpendicular to the width direction of the battery cell; wherein the area of the first side surface is smaller than the area of the second side surface.

[0008] In one embodiment, the battery cell includes a center surface parallel to the first side surface, and in each battery cell, the positive electrode ear and the negative electrode ear are symmetrically arranged about the center surface.

[0009] In one embodiment, the positive electrode ear and the negative electrode ear are arranged in sequence along the length direction of the battery cell.

[0010] In one embodiment, in the adjacent two battery cells, the negative electrode ear of one battery cell is arranged adjacent to the negative electrode ear of another battery cell along the length direction of the battery cell.

[0011] Or in two adjacent said battery cell, one of the positive tab and the other said battery cell positive tab adjacent to the length of the battery cell.

[0012] In an embodiment, the battery further comprises a cover plate, the cover plate is provided on one side of the battery cell, the cover plate is insulated from the negative tab, one end of the cover plate is electrically connected with the positive tab of one battery cell, the other end of the cover plate is electrically connected with the positive tab of another battery cell.

[0013] In an embodiment, the battery further comprises a first connecting piece, the first connecting piece is provided between two adjacent battery cells, the first connecting piece is insulated from the cover plate, one end of the first connecting piece is electrically connected with the negative tab of one battery cell, the other end of the first connecting piece is electrically connected with the negative tab of another battery cell.

[0014] In an embodiment, the cover plate comprises:

[0015] The cover plate body is provided on one side of the battery cell, the cover plate body is electrically connected with the positive tab, the cover plate body is insulated from the negative tab, the cover plate body is provided with a first mounting hole and a second mounting hole, the first mounting hole is provided corresponding to the positive tab, the second mounting hole is provided corresponding to the first connecting piece;

[0016] The first pole is provided on the side of the cover plate away from the battery cell, one end of the first pole is provided in the first mounting hole, and the first pole and the inner wall of the first mounting hole are in contact with each other;

[0017] The second pole is provided on the side of the cover plate away from the battery cell, one end of the second pole passes through the second mounting hole and is electrically connected with the first connecting piece, and the second pole is insulated from the inner wall of the second mounting hole.

[0018] In an embodiment, the first pole is located in the positive tab on the battery cell; the second pole is located in the first connecting piece on the battery cell.

[0019] Secondly, the utility model embodiment provides a kind of electric equipment, including the battery described in any one embodiment of the above.

[0020] The utility model embodiment provides a kind of battery and electric equipment, the battery includes at least two electric cores, two electric cores are sequentially arranged along the length direction of electric core, and electric core includes electric core main body and the positive lug and negative lug of being arranged on the same side of electric core main body, by in adjacent two electric cores, the positive lug of one electric core and the positive lug of another electric core are electrically connected, the negative lug of one electric core and the negative lug of another electric core are electrically connected, to reduce the heat concentration of electric core, so that the central expansion force of electric core is dispersed, to further prolong the service life of battery;Meanwhile, the path of internal electron transmission of each electric core is shortened, and transmission impedance and polarization effect are reduced, so as to improve the power output performance of electric core. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can also be obtained according to these drawings without creative labor for those skilled in the art.

[0022] Figure 1 The structural diagram of the battery provided by the utility model embodiment is shown in the figure.

[0023] Figure 2 The explosion diagram of the battery provided by the utility model embodiment is shown in the figure.

[0024] Figure 3 The structural diagram of the electric core assembly provided by the utility model embodiment is shown in the figure.

[0025] Figure 4 The assembly diagram of the electric core assembly and the cover plate provided by the utility model embodiment is shown in the figure.

[0026] Figure 5 The structural diagram of the electric core provided by the utility model embodiment is shown in the figure.

[0027] Figure 6 The top view structural diagram of the electric core provided by the utility model embodiment is shown in the figure.

[0028] Explanation of reference signs:

[0029] 1-battery; 11-electric core assembly; 12-housing; 13-cover plate; 14-first connecting piece; 15-second connecting piece;

[0030] 111-electric core; 111A-first side; 111B-second side; 111C-center surface; 1111-electric core main body; 1112-positive lug; 1113-negative lug; 1114-positive pole piece; 1115-negative pole piece; 1116-isolation film;

[0031] 121 - housing cavity; 122 - first port; 131 - cover plate body; 132 - first pole; 133 - second pole; 131A - first mounting hole; 131B - second mounting hole. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be apparently and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by the person skilled in the art without creative labor fall within the scope of protection of the present application. In addition, it should be understood that the specific embodiments described herein are only used for illustration and explanation of the present application, and are not used for limiting the present application. In the present application, the orientation words such as "upper" and "lower" generally refer to the upper and lower in the actual use or working state of the device, and specifically refer to the drawing direction in the drawings; and "inner" and "outer" refer to the contour of the device.

[0033] Please refer to Figure 1 , Figure 2 and Figure 3 ; wherein, Figure 1 is a structural schematic diagram of a battery provided by the embodiments of the present application; Figure 2 is an explosion schematic diagram of a battery provided by the embodiments of the present application; Figure 3 is a structural schematic diagram of a battery cell assembly provided by the embodiments of the present application; Figure 4 is an assembly schematic diagram of a battery cell assembly and a cover plate provided by the embodiments of the present application.

[0034] In an embodiment, the battery 1 includes but is not limited to a square battery, the battery 1 includes a plurality of battery cell assemblies 11, the battery cell assembly 11 includes two battery cells 111, the two battery cells 111 are sequentially arranged along the length direction of the battery cell 111, the battery cell 111 includes a battery cell body 1111 and a positive electrode lug 1112 and a negative electrode lug 1113 arranged on the same side of the battery cell body 1111; wherein, in the adjacent two battery cells 111, the positive electrode lug 1112 of one battery cell 111 and the positive electrode lug 1112 of another battery cell 111 are electrically connected, and the negative electrode lug 1113 of one battery cell 111 and the negative electrode lug 1113 of another battery cell 111 are electrically connected, thereby realizing the parallel arrangement of the adjacent two battery cells 111.

[0035] It should be noted that the number of the battery cells in the battery cell assembly is not limited, the battery cell assembly can include two, three, four, five or more battery cells, and the specific number can be flexibly adjusted according to the voltage and capacity requirements in the actual application scene, the module design requirements and the space limitation, and the embodiment is only exemplified by taking that the battery cell assembly includes two battery cells.

[0036] Specifically, the length direction of the battery cell 111 can be the X direction in the battery cell 111, the width direction of the battery cell 111 can be the Y direction in the battery cell 111, and the height direction of the battery cell 111 is the Z direction in the battery cell 111. Figure 2 Figure 2 Figure 2

[0037] It can be understood that, since the battery cell 111 can expand in the center area during the charging and discharging process, if the large-area side surfaces of the two adjacent battery cells 1 contact each other, the expansion force will be too concentrated, and then the pressure in the center area will be too large, which can cause deformation, rupture or other structural damage of the battery cell 1; the embodiment avoids the case that the expansion force is excessively accumulated by sequentially arranging the two battery cells 111 along the length direction of the battery cell 111, thereby reducing the risk that the expansion force in the center area of the battery cell 111 is too high; at the same time, the battery cell 1 can maintain good shape stability under high load, high temperature and other working environments, and is not prone to cracking or leakage due to excessive internal pressure, thereby enhancing the overall performance and reliability of the battery cell 1.

[0038] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 ; wherein, Figure 5 is a structural schematic diagram of the battery cell provided by the embodiment of the utility model.

[0039] In an embodiment, the battery cell 111 includes a first side surface 111A and a second side surface 111B arranged adjacent to each other, the extension direction of the first side surface 111A is perpendicular to the length direction of the battery cell 111, and the extension direction of the second side surface 111B is perpendicular to the width direction of the battery cell 111; wherein the area of the first side surface 111A is smaller than the area of the second side surface 111B.

[0040] ​​​Specifically, the battery cell 111 further comprises a shell 12, the shell 12 comprises a receiving cavity 121, and the battery cell assembly 11 is arranged in the receiving cavity 121; wherein the first side surface 111A of two adjacent battery cells 111 is arranged oppositely, and the second side surface 111B of the battery cell 111 faces the inner wall of the shell 12.

[0041] It can be understood that, since the area of the second side surface 111B is larger than the area of the first side surface 111A, by arranging the first side surface 111A of two adjacent battery cells 111 oppositely and arranging the second side surface 111B of the battery cell 111 to face the inner wall of the shell 12, the contact area between the battery cell 111 and the outer side of the battery cell assembly 11 is increased, thereby effectively improving the heat dissipation efficiency of the battery cell 111, so that the heat can be dissipated more quickly from the inside of the battery cell 111 to the external environment during the charging and discharging process of the battery 1, avoiding the accumulation of heat, and improving the heat dissipation performance of the battery 1.

[0042] Please continue to combine Figures 1 to 5 In an embodiment, the battery cell 111 comprises a center surface 111C parallel to the first side surface 111A, and the positive electrode tab 1112 and the negative electrode tab 1113 are symmetrically arranged about the center surface 111C in each battery cell 111, thereby optimizing the conduction path of the internal current of the battery cell 111 during operation, ensuring more uniform current distribution, reducing polarization and internal resistance, and improving the efficiency and reliability of the battery 1.

[0043] Specifically, the center surface 111C of the battery cell 111 is arranged parallel to the first side surface 111A, the extension direction of the first side surface 111A is perpendicular to the length direction of the battery cell 111, the plane in which the center line of the battery cell 111 in the width direction is located is the center surface 111C of the battery cell 111, and the center surface 111C divides the battery cell 111 into two parts in the length direction of the battery cell 111.

[0044] It should be noted that, in the related art, the internal resistance of the battery (i.e. the resistance inside the battery) directly affects the charging and discharging efficiency and power output of the battery, and one of the main sources of internal resistance is the transmission path of the current from the active material of the battery cell to the electrode connection point (such as the tab), the length of the path and the resistance of the material through which the current passes determine the overall internal resistance of the battery, and high internal resistance can cause energy loss, excessive heat, and even shorten the service life of the battery; at the same time, the polarization phenomenon in the battery refers to the change of potential difference in a part of the battery due to the non-uniformity of the chemical reaction inside the battery or the non-uniform flow of current during the charging and discharging process of the battery, thereby affecting the normal working performance of the battery.

[0045] It can be understood that, by arranging the positive tab 1112 and the negative tab 1113 symmetrically about the center surface 111C, the transmission distance of the current from the cell body 1111 to the tabs (the positive tab 1112 and the negative tab 1113) is shortened, and the path length of the current flowing from the cell 111 to the positive tab 1112 is ensured to be equal to the path length of the current flowing from the cell 111 to the negative tab 1113, so that the conduction path of the current inside the cell 111 becomes more symmetrical and balanced, avoiding local overcurrent or uneven current, thereby reducing the internal resistance of the battery 1, reducing the heating and polarization phenomenon of the battery 1, and improving the efficiency and stability of the battery 1.

[0046] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 ; wherein, Figure 6 is a top view structural schematic diagram of the cell provided by the utility model embodiment.

[0047] In an embodiment, the cell 111 can be a laminated cell 111, which includes a plurality of positive electrode sheets 1114, a plurality of negative electrode sheets 1115, and a plurality of isolation films 1116. One positive tab 1112 is arranged on one positive electrode sheet 1114, and the positive electrode sheet 1114 and the positive tab 1112 can be integrally formed or connected into one whole body by welding or the like. One negative tab 1113 is arranged on one negative electrode sheet 1115, and a plurality of negative tabs 1113 are arranged on the same side of the negative electrode sheet 1115. The negative electrode sheet 1115 and the negative tab 1113 can also be integrally formed or connected into one whole body by welding or the like, so that the structure of the cell 111 is compact and stable.

[0048] A plurality of positive electrode sheets 1114 and a plurality of negative electrode sheets 1115 are sequentially stacked along the width direction of the cell 111, one isolation film 1116 is arranged between one positive electrode sheet 1114 and one negative electrode sheet 1115, a plurality of positive tabs 1112 are aligned and arranged along the width direction of the cell 111, and a plurality of negative tabs 1113 are aligned and arranged along the width direction of the cell 111. Wherein, the positive tab 1112 and the negative tab 1113 are sequentially arranged along the length direction of the cell 111.

[0049] It can be understood that in the related art, the arrangement mode of the positive and negative tabs directly affects the length of the current path from the battery cell to the external circuit and the distribution thereof, and further affects the internal resistance, power performance and thermal management of the battery; in the embodiment, the positive tab 1112 and the negative tab 1113 are arranged on the same side of the battery cell body 1111, and the positive tab 1112 and the negative tab 1113 are arranged in sequence along the length direction of the battery cell 111, thereby reducing the length of the transmission path of the current from the battery cell 111 to the outside, ensuring that the current flows more uniformly, which can effectively reduce the polarization phenomenon inside the battery 1, reduce the local excessive current density, and further improve the overall performance of the battery 1.

[0050] At the same time, the shorter current transmission path and the uniform current distribution make the battery 1 work more efficiently, can better maintain stable performance under high-power load, reduce current loss, and also reduce the heat accumulation of the battery 1 due to internal resistance, reduce the heat generated by the battery 1 during charging and discharging, and improve the safety, life and working performance of the battery 1.

[0051] It should be noted that in the embodiment, the battery cell 111 can be a laminated battery cell 111, which is only used for illustration, and in another embodiment, the battery cell body 1111 can be a roll core, the battery cell 111 can be wound by at least one positive pole piece 1114, at least one negative pole piece 1115 and at least one isolation film 1116, the isolation film 1116 is arranged between the positive pole piece 1114 and the negative pole piece 1115, and the positive tab 1112 and the negative tab 1113 are arranged on the same side of the battery cell body 1111; wherein the positive pole piece 1114 can be provided with a plurality of positive tabs 1112, the negative pole piece 1115 can be provided with a plurality of negative tabs 1113, a plurality of positive tabs 1112 can be arranged in alignment along the width direction of the battery cell 111, and a plurality of negative tabs 1113 can be arranged in alignment along the width direction of the battery cell 111.

[0052] Please continue to combine Figures 1 to 6 ; in an embodiment, among two adjacent battery cells 111, the negative tab 1113 of one battery cell 111 is arranged adjacent to the negative tab 1113 of another battery cell 111 along the length direction of the battery cell 111, so that the connection of the two adjacent battery cells 111 is more compact.

[0053] Specifically, in the two adjacent battery cells 111, the positive tab 1112 of one battery cell 111 is electrically connected with the positive tab 1112 of another battery cell 111, and the negative tab 1113 of one battery cell 111 is electrically connected with the negative tab 1113 of another battery cell 111, so that the two adjacent battery cells 111 are arranged in parallel; wherein, by arranging the negative tab 1113 of one battery cell 111 adjacent to the negative tab 1113 of another battery cell 111 along the length direction of the battery cell 111, the current flow path is shortened, the impedance in the current flow is reduced, so that the current is more evenly distributed between the two parallel battery cells 111, balancing the load of each battery cell 111 in the battery cell assembly 11, preventing one battery cell 111 from carrying too much current, and avoiding overheating or performance degradation of the battery cell 111 caused by uneven load.

[0054] It should be noted that in the embodiment, the negative tab 1113 of one battery cell 111 is arranged adjacent to the negative tab 1113 of another battery cell 111 along the length direction of the battery cell 111, which is only used for illustration. In another embodiment, the positive tab 1112 of one battery cell 111 is arranged adjacent to the positive tab 1112 of another battery cell 111 along the length direction of the battery cell 111; that is, the position of the positive tab 1112 and the negative tab 1113 is not limited in the embodiment.

[0055] Please continue to combine Figures 1 to 6 In an embodiment, the battery 1 further comprises a cover plate 13, the cover plate 13 is arranged on one side of the battery cell 111, the cover plate 13 is arranged in insulation with the negative tab 1113, one end of the cover plate 13 is electrically connected with the positive tab 1112 of one battery cell 111, the other end of the cover plate 13 is electrically connected with the positive tab 1112 of another battery cell 111, so as to realize the electrical connection between the positive tabs 1112 of the two adjacent battery cells 111.

[0056] Specifically, the shell 12 further comprises a first port 122 communicating the accommodating cavity 121 with the external space, and the cover plate 13 is used to seal the first port 122 of the shell 12; the battery 1 further comprises a plurality of second connecting pieces 15, the second connecting pieces 15 are arranged between the battery cells 111 and the cover plate 13, one second connecting piece 15 corresponds to one battery cell 111, and one second connecting piece 15 is used to connect a plurality of positive tabs 1112, so as to realize the electrical connection between the plurality of positive tabs 1112.

[0057] It can be understood that the embodiment connects the positive tabs 1112 of two adjacent battery cells 111 through the cover plate 13 and the second connecting piece 15, thereby avoiding a complex separate connection mode, reducing the mechanical complexity of the connection of the battery cells 111, and simplifying the assembly process of the battery cell assembly 11. Meanwhile, by insulating the cover plate 13 from the negative tabs 1113, the possible electrical short circuit risk between the cover plate 13 and the negative tabs 1113 is avoided, the safety of the battery 1 is ensured, and the stability of the battery 1 during charging and discharging is improved.

[0058] It should be noted that the battery 1 further comprises a plurality of second connecting pieces 15, one second connecting piece 15 corresponding to one battery cell 111, and one second connecting piece 15 being used for connecting a plurality of positive tabs 1112, which is only used for illustration.

[0059] In another embodiment, in each battery cell 111, a plurality of positive tabs 1112 are arranged in sequence along the width direction of the battery cell 111. When the cover plate 13 is assembled with the shell 12, the positive tabs 1112 can be bent towards the battery cell body 1111, so that a plurality of positive tabs 1112 are stacked in sequence and connected with the cover plate 13, thereby realizing the electrical connection between the cover plate 13 and a plurality of positive tabs 1112 without the need to set the second connecting piece 15, reducing the complexity of the battery structure, and also improving the stability and efficiency of the electrical connection, which helps to reduce the internal resistance of the battery, improve the overall performance and reliability, and meet the application requirements in different scenarios.

[0060] Further, the battery 1 further comprises a first connecting piece 14, which is arranged between two adjacent battery cells 111. One end of the first connecting piece 14 is electrically connected with the negative tab 1113 of one battery cell 111, and the other end of the first connecting piece 14 is electrically connected with the negative tab 1113 of another battery cell 111, thereby realizing the electrical connection between the negative tabs 1113 of two adjacent battery cells 111.

[0061] Specifically, in each battery cell 111, a plurality of negative tabs 1113 are stacked in sequence along the width direction of the battery cell 111. By bending the plurality of stacked negative tabs 1113 towards the battery cell body 1111, a plurality of negative tabs 1113 can be arranged in sequence, and a plurality of negative tabs 1113 can be fixedly connected by welding, thereby ensuring good electrical contact and mechanical stability between a plurality of negative tabs 1113, thereby improving the current transmission efficiency and the overall performance of the battery 1.

[0062] The first connecting piece 14 is insulated from the cover plate 13, and the first connecting piece 14 and the plurality of negative tabs 1113 arranged in stacks can be fixedly connected by welding, thereby ensuring firm electrical connection between the negative tabs 1113 and the first connecting piece 14, and improving the reliability and durability of the battery 1.

[0063] It can be understood that the embodiment realizes electrical connection between the positive tabs 1112 of the two adjacent battery cells 111 by arranging the cover plate 13, and realizes electrical connection between the negative tabs 1113 of the two adjacent battery cells 111 by arranging the first connecting piece 14, thereby realizing parallel arrangement between the two adjacent battery cells 111, simplifying the assembly process of the battery cell assembly 11, and ensuring the stability and efficiency of electrical connection between the battery cells 111. At the same time, by optimizing the connection mode of the positive and negative tabs 1113, the connection resistance can be effectively reduced, the current transmission efficiency of the battery 1 can be improved, and the overall performance and cycle stability of the battery 1 can be enhanced.

[0064] In addition, since the negative tab 1113 of one battery cell 111 is arranged adjacent to the negative tab 1113 of another battery cell 111 along the length direction of the battery cell 111, the first connecting piece 14 only needs to cover a relatively short distance to realize electrical connection between the two adjacent negative tabs 1113, thereby reducing the overall length of the first connecting piece 14, and further simplifying the structure of the battery 1.

[0065] Please continue to combine Figures 1 to 6 In an embodiment, the cover plate 13 includes a cover plate body 131, a first pole 132, and a second pole 133. The cover plate body 131 is arranged on one side of the battery cell 111, the cover plate body 131 is electrically connected to the positive tab 1112, the cover plate body 131 is insulated from the negative tab 1113, the cover plate body 131 is provided with a first mounting hole 131A and a second mounting hole 131B, the first mounting hole 131A corresponds to the positive tab 1112, the second mounting hole 131B corresponds to the first connecting piece 14, the first pole 132 is arranged on the side of the cover plate 13 away from the battery cell 111, one end of the first pole 132 is arranged in the first mounting hole 131A, and the first pole 132 and the inner wall of the first mounting hole 131A are in contact with each other; the second pole 133 is arranged on the side of the cover plate 13 away from the battery cell 111, one end of the second pole 133 penetrates through the second mounting hole 131B and is electrically connected to the first connecting piece 14, and the second pole 133 is insulated from the inner wall of the second mounting hole 131B.

[0066] Specifically, one end of the cover plate body 131 is electrically connected with the positive electrode lug 1112 of one of the battery cells 111, and the other end of the cover plate body 131 is electrically connected with the positive electrode lug 1112 of another of the battery cells 111, thereby realizing the electrical connection between the positive electrode lugs 1112 of the two adjacent battery cells 111. The first pole 132 can be a positive pole, and the first pole 132 is installed in the first mounting hole 131A. The first mounting hole 131A can provide mechanical support to ensure that the first pole 132 is stably installed on the cover plate body 131 and does not loosen due to vibration or external force. The first pole 132 is in contact with the inner wall of the first mounting hole 131A, thereby realizing the electrical connection between the first pole 132 and the cover plate body 131.

[0067] It can be understood that, by electrically connecting the cover plate body 131 with the positive electrode lug 1112, the current can be transmitted to the cover plate body 131 through the pole lug, and by electrically connecting the first pole 132 with the cover plate body 131, the electrical connection between the first pole 132 and the positive electrode lug 1112 can be realized.

[0068] Further, the second pole 133 can be a negative pole, and the second pole 133 is arranged in a spaced manner with the first pole 132, thereby ensuring that the second pole 133 is arranged separately from the first pole 132 to prevent mutual interference or poor contact between the current paths.

[0069] One end of the second pole 133 passes through the second mounting hole 131B, and the second mounting hole 131B can provide mechanical support to ensure that the second pole 133 is stably installed on the cover plate body 131 and does not loosen due to vibration or external force. The second pole 133 is electrically connected with the first connecting piece 14, and the second pole 133 is insulated from the inner wall of the second mounting hole 131B, thereby avoiding unnecessary current interference or electrical failure between the second pole 133 and the cover plate body 131.

[0070] In this embodiment, an insulating material or an electrically insulating coating can be arranged between the second pole 133 and the second mounting hole 131B, thereby realizing the insulation of the second pole 133 from the inner wall of the second mounting hole 131B. At the same time, the insulating material or the electrically insulating coating can extend from the inner wall of the second mounting hole 131B to between the first connecting piece 14 and the cover plate body 131, thereby realizing the insulation between the first connecting piece 14 and the cover plate body 131.

[0071] Further, the first pole column 132 is projected on the positive electrode ear 1112 in the positive projection of the battery cell assembly 11; the second pole column 133 is projected on the first connecting piece 14 in the positive projection of the battery cell assembly 11; thereby helping to ensure that the flow path of the current in the battery cell assembly 11 is more concise and low resistance, improve the charging and discharging efficiency of the battery 1, reduce the internal resistance, and reduce the current loss; at the same time, by setting the positioning of the first pole column 132 and the second pole column 133, the components of the battery 1 are more compact, avoiding space waste, which helps to optimize the volume of the battery 1.

[0072] It can be understood that, by setting one end of the first connecting piece 14 to be electrically connected with the negative electrode ear 1113 of one of the battery cells 111, and the other end of the first connecting piece 14 to be electrically connected with the negative electrode ear 1113 of another of the battery cells 111, the current can be collected to the first connecting piece 14; wherein the second pole column 133 is electrically connected with the first connecting piece 14, so that the electrical connection between the second pole column 133 and the negative electrode ear 1113 can be realized, and then the battery cell assembly 11 can be electrically connected with external load components through the first pole column 132 and the second pole column 133.

[0073] It should be noted that in the present embodiment, the cover plate includes a cover plate body, a first pole column and a second pole column, which are only used for illustration, and the cover plate can also include a pressure relief valve, an exhaust hole, a sealing gasket and other conventional components to meet the functional requirements in different application scenarios; for example, the pressure relief valve is used to relieve pressure in time when the pressure in the battery cell abnormally rises, to avoid safety accidents of the battery pack due to overpressure; the exhaust hole can be used to adjust the internal pressure of the battery cell or dissipate heat; the sealing gasket is used to enhance the air and liquid tightness between the cover plate and the battery shell, and further improve the stability and reliability of the battery pack, and the present embodiment does not make specific limitations thereon, and the related functions and structures can be optimized and adjusted according to actual application requirements.

[0074] The utility model embodiment provides a kind of electric equipment, and the electric equipment includes the battery described in any of the above embodiments.

[0075] It can be understood that the battery has been described in detail in the above embodiments, which will not be repeated here.

[0076] The electric equipment includes a battery, and the battery module is used as a power supply for the electric equipment. Therefore, the electric equipment also has the advantages of the above battery, thereby helping to simplify the overall structure of the electric equipment. The electric equipment can be a car, an aircraft, a mechanical production device, etc.

[0077] The above has carried out the detailed introduction to the embodiment of the utility model, the principle and implementation mode of the utility model have been described in this article by applying specific examples, the above embodiment explanation is only for helping understanding the method and its core thought of the utility model; simultaneously, for the technical personnel in the art, according to the thought of the utility model, there will be changes in specific implementation mode and application range, and the above is described, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A battery, characterized by, The battery comprises at least two battery cells, and the two battery cells are arranged in sequence along the length direction of the battery cells, and the battery cell comprises a battery cell body and a positive electrode tab and a negative electrode tab arranged on the same side of the battery cell body. In the two adjacent battery cells, the positive electrode tab of one battery cell is electrically connected with the positive electrode tab of the other battery cell, and the negative electrode tab of one battery cell is electrically connected with the negative electrode tab of the other battery cell.

2. The battery of claim 1, wherein, The battery cell comprises a first side surface and a second side surface arranged adjacently, the extension direction of the first side surface is perpendicular to the length direction of the battery cell, and the extension direction of the second side surface is perpendicular to the width direction of the battery cell; and the area of the first side surface is smaller than the area of the second side surface.

3. The battery of claim 2, wherein, The battery cell comprises a center surface parallel to the first side surface, and the positive electrode tab and the negative electrode tab are symmetrically arranged with respect to the center surface in each battery cell.

4. The battery according to any one of claims 1 to 3, characterized in that, The positive electrode tab and the negative electrode tab are arranged in sequence along the length direction of the battery cell.

5. The battery of claim 4, wherein, In the two adjacent battery cells, the negative electrode tab of one battery cell is arranged adjacently with the negative electrode tab of the other battery cell along the length direction of the battery cell. Or in the two adjacent battery cells, the positive electrode tab of one battery cell is arranged adjacently with the positive electrode tab of the other battery cell along the length direction of the battery cell.

6. The battery of any one of claims 1 to 3, wherein, The battery further comprises a cover plate arranged on one side of the battery cell, the cover plate is arranged in insulation with the negative electrode tab, one end of the cover plate is electrically connected with the positive electrode tab of one battery cell, and the other end of the cover plate is electrically connected with the positive electrode tab of the other battery cell.

7. The battery of claim 6, wherein, The battery further comprises a first connecting piece arranged between the two adjacent battery cells, the first connecting piece is arranged in insulation with the cover plate, one end of the first connecting piece is electrically connected with the negative electrode tab of one battery cell, and the other end of the first connecting piece is electrically connected with the negative electrode tab of the other battery cell.

8. The battery of claim 7, wherein, The cover plate comprises: a cover plate body arranged on one side of the battery cell, the cover plate body is electrically connected with the positive electrode tab, the cover plate body is arranged in insulation with the negative electrode tab, the cover plate body is provided with a first mounting hole and a second mounting hole, the first mounting hole is arranged corresponding to the positive electrode tab, and the second mounting hole is arranged corresponding to the first connecting piece; a first pole arranged on the side of the cover plate away from the battery cell, one end of the first pole is arranged in the first mounting hole, and the first pole and the inner wall of the first mounting hole are in contact with each other; a second pole arranged on the side of the cover plate away from the battery cell, one end of the second pole passes through the second mounting hole and is electrically connected with the first connecting piece, and the second pole is arranged in insulation with the inner wall of the second mounting hole.

9. The battery of claim 8, wherein, The orthographic projection of the first pole on the battery cell is located in the orthographic projection of the positive electrode tab on the battery cell, and the orthographic projection of the second pole on the battery cell is located in the orthographic projection of the first connecting piece on the battery cell.

10. An electric device, characterized by The battery comprises the battery as claimed in any one of claims 1 to 9.

Images