A battery component, a battery pack

Abstract

The present application discloses a battery assembly and a battery pack, comprising: at least one battery module, each of the battery modules including a plurality of battery cells; a connecting member disposed on the battery cells for achieving electrical connection of the plurality of battery cells; a sealing member disposed on the battery cells, the sealing member including a sealing body and a sealing cover, and the connecting member being disposed in a sealed space formed by the sealing body and the sealing cover. By providing an independent sealing structure for the connecting member at the position of the connecting member, the connecting member is isolated from the air in the battery module, preventing the condensed water during the cooling of the water vapor in the air from coming into contact with the connecting member when the battery module is cooled, and preventing the short-circuit problem of the connecting member caused by heat dissipation problems, thereby improving the service life of the battery.

Description

Technical Field

[0001] This application generally relates to the technical field of batteries, and particularly relates to a battery assembly and a battery pack. Background Art

[0002] For battery energy storage components, heat and uneven temperature distribution occur during their use. If the heat is not dissipated in time, it will lead to a decline in battery performance and affect the battery life. Therefore, to solve the heat dissipation problem, a heat dissipation structure is usually added to the battery energy storage system to improve the heat dissipation effect. For example, axial-flow fans can be used for air extraction heat dissipation or liquid cooling and other methods.

[0003] In the prior art, for example, in a liquid-cooled energy storage battery system, the liquid-cooled plate of the battery pack will reduce the temperature of the battery components during operation, and then cause the battery module devices to cool the water vapor in the air to generate condensate, resulting in a short circuit between the positive and negative poles of the battery high-voltage busbar, causing arcing, and a short circuit between the positive and negative poles and the battery metal shell, resulting in insulation abnormalities.

[0004] However, there is no effective solution to the short-circuit problem of the busbar caused by heat dissipation problems in the prior art. Summary of the Invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a battery assembly and a battery pack that can effectively solve the short-circuit problem of the busbar caused by heat dissipation problems in the prior art.

[0006] In a first aspect, this application provides a battery assembly, including:

[0007] At least one battery module, each of the battery modules including a plurality of battery cells;

[0008] A connecting member disposed on the battery cell for realizing electrical connection of the plurality of battery cells;

[0009] A sealing member disposed on the battery cell, the sealing member including a sealing body and a sealing cover, and the connecting member is disposed in a sealed space formed by the sealing body and the sealing cover.

[0010] Optionally, a pole is disposed on the battery cell, a through hole for the pole to pass through is disposed on the sealing body, a first sealing ring is disposed between the sealing body and the sealing cover, and a second sealing ring surrounding the through hole is disposed between the sealing body and the battery cell to form a seal between the sealing body and the battery cell at the through hole.

[0011] Optionally, the connecting member includes a first connecting member for connecting the pole of one battery cell in the battery module and the pole of another battery cell;

[0012] The seal includes a first seal that mates with the first connector. The first seal includes a first seal body and a second seal cover. A first groove for receiving the first connector is provided on the first seal body;

[0013] The through holes include a first through hole and a second through hole arranged side by side on the first groove. The first through hole mates with the pole of one battery cell, and the second through hole mates with the pole of another battery cell;

[0014] The second sealing ring includes a first sub-sealing ring arranged around the first through hole and a second sub-sealing ring arranged around the second through hole.

[0015] Optionally, the battery cell includes outer walls, inner walls, and a top surface that are perpendicular to each other in pairs. The first connector is provided on the top surface. A gap is provided at the inner wall position between the battery cell and the adjacent battery cell;

[0016] The first seal is provided with a first side wall and a second side wall that are perpendicular to each other in pairs and a bottom surface connecting the first side wall and the second side wall. The first side wall contacts the outer wall of the battery cell, the second side wall contacts the inner wall of the battery cell, and the first through hole and the second through hole are provided on the bottom surface.

[0017] Optionally, the second side wall includes two sub-walls arranged at intervals, and each sub-wall contacts the inner wall of one battery cell.

[0018] Optionally, the second side wall is in interference fit with the gap between two adjacent battery cells.

[0019] Optionally, a liquid cooling component is provided in the gap between the battery cell and the adjacent battery cell, and the liquid cooling component is provided between the two sub-walls of the second side wall.

[0020] Optionally, the connector includes a second connector. The second connector includes a first connecting portion fixedly connected to the pole of one battery cell and a second connecting portion perpendicular to the first connecting portion. A connection terminal for achieving electrical connection is provided on the second connecting portion;

[0021] The seal includes a second seal that mates with the second connector. The second seal includes a second seal body and a second seal cover. A second groove for receiving the second connector is provided on the second seal body;

[0022] The through holes include a third through hole provided on the second groove and mating with the pole of the battery cell;

[0023] The second sealing ring includes a third sub-sealing ring disposed around the third through hole.

[0024] Optionally, the second groove includes a first recess for accommodating the first connecting portion and a second recess for accommodating the second connecting portion. The first recess and the second recess are vertically arranged, and the third through hole is disposed on the first recess.

[0025] Optionally, the second sealing cover includes a first cover body that cooperates with the first recess and a second cover body that cooperates with the second recess; a through portion that cooperates with the connection terminal is provided on the second cover body, and a third sealing ring is provided around the through portion between the second sealing cover and the connection terminal.

[0026] Optionally, the battery cell includes an outer wall, an inner wall, and a top surface that are perpendicular to each other in pairs. The second connecting member is disposed on the top surface, and a gap is provided at the position of the inner wall between the battery cell and the adjacent battery cell;

[0027] The inner surface of the second recess contacts the outer wall of the battery cell, and a third side wall that contacts the inner wall of the battery cell is further provided on the second sealing member.

[0028] Optionally, the third side wall is in interference fit with the gap between two adjacent battery cells.

[0029] Optionally, the second connecting members are electrically connected to each other through an adapter that cooperates with the connection terminal.

[0030] Optionally, adjacent battery cells in the battery module are electrically connected through a first connecting member. The battery module includes a first output terminal and a second output terminal, and second connecting members are respectively provided on the first output terminal and the second output terminal for realizing the electrical connection of the battery module.

[0031] In a second aspect, the present application provides a battery pack, including the battery assembly as described in any one of the above.

[0032] The technical solutions provided by the embodiments of the present application may include the following beneficial effects:

[0033] For the battery assembly and the battery pack provided by the embodiments of the present application, by providing an independent sealing structure for the connecting member at the position of the connecting member, the connecting member is isolated from the air in the battery module, preventing the condensed water during the cooling of the water vapor in the air from contacting the connecting member when the battery module is cooled, and preventing the short circuit problem of the connecting member caused by the heat dissipation problem, thereby improving the battery service life. Description of the Drawings

[0034] Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments read in conjunction with the accompanying drawings:

[0035] Figure 1 Schematic structural diagram of a battery assembly provided for an embodiment of the present application;

[0036] Figure 2 Explosion diagram of a battery assembly provided for an embodiment of the present application;

[0037] Figure 3 Schematic structural diagram of a battery cell provided for an embodiment of the present application;

[0038] Figure 4 Schematic structural diagram of a first connecting member provided for an embodiment of the present application;

[0039] Figure 5 Schematic structural diagram of a battery assembly provided for an embodiment of the present application;

[0040] Figure 6 Schematic structural diagram of a first sealing body provided for an embodiment of the present application;

[0041] Figure 7 Schematic structural diagram of a first sealing cover provided for an embodiment of the present application;

[0042] Figure 8 Schematic structural diagram of a first sealing body provided for an embodiment of the present application;

[0043] Figure 9 Schematic structural diagram of a liquid cooling assembly provided for an embodiment of the present application;

[0044] Figure 10 Partial enlarged schematic diagram of a battery assembly provided for an embodiment of the present application;

[0045] Figures 11-12 Schematic structural diagram of a second connecting member provided for an embodiment of the present application;

[0046] Figure 13 Schematic structural diagram of a battery assembly provided for an embodiment of the present application;

[0047] Figures 14-15 Schematic structural diagram of a second sealing body provided for an embodiment of the present application;

[0048] Figures 16-17 Schematic structural diagram of a second sealing cover provided for an embodiment of the present application;

[0049] Figure 18A partially enlarged schematic view of a battery assembly provided by an embodiment of the present application;

[0050] Figure 19 A schematic structural view of a battery assembly provided by an embodiment of the present application;

[0051] Figure 20 A schematic structural view of another battery assembly provided by an embodiment of the present application.

[0052] In the figure:

[0053] 100, battery module; 200, connecting member; 300, seal; 500, liquid cooling assembly; 600, high-voltage wire harness;

[0054] 10, battery cell; 20, seal body; 30, seal cover; 40, first sealing ring; 50, second sealing ring; 60, third sealing ring; 70, through hole;

[0055] 11, housing; 12, top cover; 13, terminal; 107, outer wall; 108, inner wall; 109, top surface;

[0056] 101, first battery cell; 102, second battery cell; 105, first terminal; 106, second terminal;

[0057] 14, first connecting member; 15, first seal; 21, first seal body; 22, first seal cover; 103, first through hole; 104, second through hole; 23, first groove; 201, first electrical connection area; 202, second electrical connection area; 203, intermediate connection area; 204, first surface; 205, second surface; 27, first side wall; 28, second side wall; 29, bottom surface; 501, first sub-sealing ring; 502, second sub-sealing ring;

[0058] 16, second connecting member; 17, second seal; 24, second seal body; 25, second seal cover; 26, second groove; 30, third side wall; 31, inner surface; 503, third sub-sealing ring;

[0059] 400, adapter; 80, through portion; 90, connection terminal;

[0060] 301, first connection portion; 302, second connection portion; 303, abutting portion; 304, third through hole; 305, first concave portion; 306, second concave portion; 307, first inner surface; 308, second inner surface; 309, first cover body; 310, second cover body;

[0061] 18, first output pole; 19, second output pole. Detailed implementation manners

[0062] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related invention, rather than limiting the invention. Additionally, it should be noted that for the convenience of description, only the parts related to the invention are shown in the drawings.

[0063] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and embodiments.

[0064] Please refer to Figures 1-2 , the present application provides a battery assembly, including:

[0065] At least one battery module 100, each of the battery modules 100 including a plurality of battery cells 10;

[0066] A connecting member 200 disposed on the battery cell 10 for realizing electrical connection of the plurality of battery cells 10;

[0067] A sealing member 300 disposed on the battery cell 10, the sealing member 300 including a sealing body 20 and a sealing cover 30, and the connecting member 200 is disposed in a sealed space formed by the sealing body 20 and the sealing cover 30.

[0068] In an embodiment of the present application, one connecting member 200 is disposed in each sealing member 300, and the sealing member 300 can achieve independent sealing of the connecting member 200, so that the connecting member 200 is isolated from the air in the battery module 100, preventing the condensed water during the cooling of the water vapor in the air from coming into contact with the connecting member 200 when the battery module 100 is cooled, and preventing the short - circuit problem of the connecting member 200 caused by heat dissipation problems, thereby improving the battery service life.

[0069] When a plurality of battery cells 10 are connected into a module, it is necessary to assemble the batteries in series or parallel through the connecting member 200. The two ends of the connecting member 200 are respectively welded to the electrode posts 13 of different battery cells to achieve series or parallel connection. As Figure 3 shown, an embodiment of a battery cell 10 is exemplified in the present application, including a housing 11 provided with an opening; an electrode core accommodated in the housing 11; and a top cover 12 fixedly connected to the housing 11, wherein the top cover 12 covers the opening for enclosing the electrode core in the housing 11.

[0070] There are two terminal posts 13 in the battery for outputting electric energy to the outside, one is the positive terminal post 13 and the other is the negative terminal post 13. In this embodiment, the two terminal posts 13 are respectively the first terminal post 105 and the second terminal post 106, both of which are arranged on the top cover sheet. The first terminal post 105 can be either the positive terminal post 13 or the negative terminal post 13. Correspondingly, the second terminal post 106 is the negative terminal post 13 or the positive terminal post 13. The battery cell exemplified in this embodiment can be a wound structure. For example, the battery cell includes a positive electrode sheet, a separator and a negative electrode sheet, which can be sequentially stacked and wound.

[0071] The battery cell 10 is provided with terminal posts 13, the sealing body 20 is provided with through holes 70 for the terminal posts 13 to pass through, a first sealing ring 40 is arranged between the sealing body 20 and the sealing cover 30, and a second sealing ring 50 surrounding the through holes 70 is arranged between the sealing body 20 and the battery cell 10 to form a seal between the sealing body 20 and the battery cell 10 at the through holes 70. The sealing effect of the seal 300 is improved by the first sealing ring 40 and the second sealing ring 50.

[0072] In the embodiment of the present application, the connecting member 200 is made of a metal material with good electrical conductivity, such as copper, copper alloy, aluminum or aluminum alloy. The sealing body 20 and the sealing cover 30 can be made of insulating plastic parts. For example, the sealing body 20 and the sealing cover 30 are made of high-temperature resistant insulating plastic materials by an integrally injection-molded method, such as one or more of the materials of PP or PPS. The setting of the seal 300 can not only seal the connecting member 200, but also prevent the housing 11 of the battery cell 10 from directly contacting the connecting member 200, and form an effective insulation protection between the connecting member 200 and the housing 11 of the battery cell 10.

[0073] The terminal post 13 is square, circular or oval, etc. The through hole 70 can be in a shape adapted to the terminal post 13. In the embodiment of the present application, the connecting member 200 and the battery terminal post 13 are fixedly connected by welding. When setting, the cross-sectional area of the through hole 70 is slightly larger than the cross-sectional area of the terminal post 13 to prevent the terminal post 13 from contacting the sealing body 20, so that when the terminal post 13 and the connecting member 200 are welded, the welding heat is transferred to the sealing body 20 and affects the sealing performance of the sealing body 20. Similarly, in order to avoid the heat transfer of the connecting member 200 during the welding process to the sealing body 20, the connecting member 200 is non-contact with the sealing body 20, and the volume of the sealed space on the sealing body 20 is larger than the volume of the connecting member 200.

[0074] In the embodiments of the present application, the structures of two types of seals 300 and two types of connectors 200 are provided. The structure of each connector 200 is different, and the structure of the seal 300 that cooperates with the connector 200 is also different. In different embodiments, selection can be made according to requirements. The structures of the connector 200 and the seal 300 will be described exemplarily in the following embodiments.

[0075] Embodiment 1

[0076] As Figure 4 shown, the connector 200 includes a first connector 14, and the first connector 14 is used to connect the pole 13 (first pole 105) of one battery cell 10 (such as the first battery cell 101) in the battery module 100 and the pole 13 (second pole 106) of another battery cell 10 (such as the second battery cell 102).

[0077] In the embodiments of the present application, the connector 200 is in a flat plate shape, and the connector 200 includes a first electrical connection area 201 and a second electrical connection area 202; the first electrical connection area 201 is electrically connected to the first pole 105 of the first battery cell 101; the second electrical connection area 202 is electrically connected to the second pole 106 of the second battery cell 102. It should be noted that the first battery cell 101 and the second battery cell 102 are the names for two battery cells 10 covered by a single connector 200. Or rather, the battery module 100 has multiple batteries, and two adjacent batteries can be respectively called the first battery cell 101 and the second battery cell 102. Here, the battery covered on the left side of the connector 200 is taken as the first battery cell 101, and the battery covered on the right side of the connector 200 is taken as the second battery cell 102 for exemplary description.

[0078] A relatively high temperature of the battery cells in the battery module 100 may cause the size of the battery module 100 to expand and change. The connector 200 includes an intermediate connection area 203 provided between the first electrical connection area 201 and the second electrical connection area 202. The metal connector 200 can be bent into an arch shape. Under the action of a relatively small external force, the arch shape generates a large elastic deformation amount, effectively eliminating risks such as connection loosening and cracking caused by vibration, and can absorb energy through deformation to protect the battery pole 13 from damage. For example, the arch of the metal connector 200 is bent in the direction away from the first surface 204 of the first groove 23 to form a heat dissipation area between the connector 200 and the first groove 23, avoiding contact between the connector 200 and the seal 300, and preventing scalding or thermal deformation of the seal 300 during welding, thereby affecting the sealing effect. It can be understood that the intermediate connection area 203 can be formed by blanking, and the structure of the arch is not limited to a semi-circular shape, and can also be a continuously arranged wavy shape, etc.

[0079] In this embodiment, as Figures 5-7 shown, the seal 300 includes a first seal 15, and the first seal 15 includes a first seal body 21 and a first seal cover 22. Figure 5 In part A in, the first seal cover 22 is removed. A first groove 23 for accommodating the first connecting member 14 is provided on the first seal body 21. The through hole 70 includes a first through hole 103 and a second through hole 104 arranged side by side on the first groove 23. Among them, the first through hole 103 is provided for the pole 13 (first pole 105) of one battery cell 10 to pass through, and the second through hole 104 is for the pole 13 (second pole 106) of the other battery cell 10 to pass through. The second sealing ring 50 includes a first sub-sealing ring 201 arranged around the first through hole 103 and a second sub-sealing ring 502 arranged around the second through hole 104.

[0080] In the embodiment of the present application, by providing the first groove 23 on the first seal 15 to accommodate the first connecting member 14, while realizing the electrical connection of two adjacent battery cells 10, the first connecting member 14 is sealed, so that the first connecting member 14 is isolated from the air in the battery module 100, preventing the condensed water during the cooling of the air in the battery module 100 from contacting the connecting member 200 during the cooling process of the water vapor in the air, and preventing the short-circuit problem of the first connecting member 14 caused by heat dissipation problems; it can also prevent the housing 11 of the battery cell 10 from directly contacting the connecting member 200, and forming an effective insulation protection between the connecting member 200 and the housing 11 of the battery cell 10.

[0081] In this embodiment, the first groove 23 includes a first surface 204 and a second surface 205 arranged opposite to each other. The first surface 204 is used to place the first connecting member 14. As Figure 8 shown, the second surface 205 is used to set the second sealing ring 50. The first seal body 21 and the first seal cover 22 can be fixedly connected by fixing members such as bolts, which is convenient for the inspection and replacement of the first connecting member 14; a first sealing ring 40 is provided between the first seal body 21 and the first seal cover 22. When the first seal body 21 and the first seal cover 22 are fixedly connected, by compressing the first sealing ring 40, the sealing effect of the first seal 15 can be improved.

[0082] In the embodiment of the present application, the pole column 13 passes through the through hole 70 on the sealing body 20 and is welded to the first connecting member 14 disposed in the first sealing body 21. On the one hand, the electrical connection between the pole column 13 and the connecting member 200 is achieved. On the other hand, by pressing the first sealing body 21 and the top cover 12 of the battery cell 10 by the first connecting member 14, the first connecting member 14 can also fix the first sealing member 15. During the welding process, the pole column 13 needs to protrude above the first surface 204 of the first sealing body 21. The second sealing ring 50 (the first sub-sealing ring 501 and the second sub-sealing ring 502) is made of insulating elastic material and can be compressed to a certain extent, providing a small adjustable space for the sealing body 20 in the height direction. Therefore, in order to save the internal space of the battery module 100 and improve the fixing effect of the first sealing member 15, in this embodiment, when the second sealing ring 50 contacts the top cover 12 of the battery cell 10 in the uncompressed state, that is, before the first connecting member 14 is welded to the electrode pole column 13, the pole column 13 is flush with or slightly lower than the first surface 204 of the first sealing body 21.

[0083] In this embodiment, the first sub-sealing ring 501 and the second sub-sealing ring 502 are respectively fixedly disposed on the second surface 205 of the first groove 23 through the first mounting holes. Among them, the first mounting holes are disposed around the through hole 70, and the cross-sectional area of the first mounting holes is larger than the cross-sectional area of the through hole 70, that is, the first mounting holes are arranged around the through hole 70.

[0084] Before the pole column 13 is welded to the first connecting piece 14, the first sealing body 21 is first pressed downwards, so that the second sealing ring 50 is compressed and deformed downwards, and at the same time, the pole column 13 is exposed from the first surface 204 of the first sealing body 21, improving the welding effect and preventing the first connecting member 14 from contacting the first sealing body 21 during welding, causing thermal deformation of the first sealing body 21 and affecting the sealing effect. When the welding is completed, the first connecting member 14 is fixedly connected to the pole column 13, and the first connecting member 14 continues to apply force to the first sealing body 21, so that the second sealing member 17 is in a compressed state, improving the sealing degree of the first sealing member 15.

[0085] In the embodiment of the present application, the battery module 100 includes a plurality of battery cells 10. Among them, the battery cell 10 includes outer walls 107, inner walls 108 and a top surface 109 that are perpendicular to each other in pairs. The first connecting member 14 is disposed on the top surface 109. A gap is provided at the position of the inner wall 108 between the battery cell 10 and the adjacent battery cell 10. A liquid cooling component 500 is provided in the gap between the battery cell 10 and the adjacent battery cell 10. The liquid cooling component 500 is disposed between two sub-walls of the second side walls 28 of two adjacent battery cells.

[0086] It is understandable that the heat conduction and heat dissipation methods of the liquid cooling component 500 in the embodiments of the present application are not limited. In specific applications, various different heat dissipation methods in the prior art can be adopted. For example, a liquid cooling heat sink can be used. As Figure 9 shown, a heat exchange medium is provided inside the liquid cooling heat sink. The accommodation space serves as the flow path of the heat exchange medium, and heat transfer is carried out through phase changes such as evaporation and condensation and movement. In the embodiments of the present application, the cooling medium can be water or other refrigerants such as freon, ammonia, acetone, methanol, ethanol, heptane, etc. The present application does not limit this.

[0087] Through the liquid cooling component 500 provided between the battery cells 10, the heat of the battery is quickly removed through the flow or phase change of the cooling medium inside the liquid cooling component 500. The heat dissipation method inside the battery also includes natural heat dissipation, which is achieved by heat exchange between the battery cell 10 and the air inside the battery module 100. By making the area of the liquid cooling component 500 adapt to the area of the inner wall 108 of the battery cell 10, the heat dissipation effect can be improved. In the embodiments of the present application, when heat dissipation is carried out inside the battery module 100 through the liquid cooling component 500, water vapor in the air converges on the surface of the battery and the surface of the seal 300. By using the seal 300 through the connecting piece provided on the top surface 109 for sealing, condensed water can be effectively isolated.

[0088] In the present application, the arrangement method of the liquid cooling component 500 on the battery module 100 can be such that a liquid cooling component 500 is provided between every two battery cells 10. Of course, other arrangement methods can also be adopted, such as placing a liquid cooling component 500 every four battery cells 10. In specific applications, the number and position of the liquid cooling component 500 can be adjusted according to actual conditions.

[0089] Please continue to refer to Figure 7 and Figure 9, a first side wall 27 and a second side wall 28 perpendicular to each other and a bottom surface 29 connecting the first side wall 27 and the second side wall 28 are provided on the first seal 15, and the first through hole 103 and the second through hole 104 are provided on the bottom surface 29. After the first seal 15 is assembled with the battery cell 10, the first side wall 27 is used to contact the outer wall 107 of the battery cell 10, the second side wall 28 is used to contact the inner wall 108 of the battery cell 10, and the bottom surface 29 is used to contact the top surface 109 of the battery cell 10. By contacting the outer wall 107 of the battery cell 10 through the first side wall 27, contacting the inner wall 108 of the battery cell 10 through the second side wall 28, and contacting the top surface 109 of the battery cell 10 through the bottom surface 29, the positioning of the first seal 15 can be realized, preventing the first seal 15 from shifting during the process of the connecting member 200, ensuring the sealing effect, and at the same time ensuring the position of the connecting member 200 is fixed during the welding process, which is beneficial to improving the welding accuracy between the connecting member 200 and the pole 13 of the battery core and reducing the defective rate during the assembly process.

[0090] It can be understood that in the embodiment of the present application, the first side wall 27 can contact the outer wall 107 of the first battery cell 101, can also contact the outer wall 107 of the second battery cell 102, and of course can also contact the outer walls 107 of the first battery cell 101 and the second battery cell 102 at the same time. The first side wall 27 can contact the left outer wall 107 or the right outer wall 107 of the two battery cells 10, and the present application does not limit this. Similarly, the second side wall 28 can contact the inner wall 108 of the first battery cell 101, can also contact the inner wall 108 of the second battery cell 102, and of course can also contact the inner walls 108 of the first battery cell 101 and the second battery cell 102 at the same time. The second side wall 28 can contact the left inner wall 108 or the right inner wall 108 of the two battery cells 10.

[0091] In addition, in the embodiment of the present application, the first connecting member 14 sealed in the first seal body 21 is fixedly connected to the adjacent two battery cells 10. Therefore, in the embodiment of the present application, it is preferably to set the second side wall 28 at the gap position formed between the adjacent two battery cells 10 corresponding to the first seal body 21. By setting the second side wall 28 in the gap between the two battery cells 10, the second side wall 28 can be clamped by the two battery cells 10 to prevent the first seal 15 from moving, etc. Especially before the first connecting member 14 is welded, the movement of the first seal body 21 can be avoided from affecting the welding accuracy or the sealing accuracy, etc.

[0092] Optionally, as Figure 4 and Figure 10 shown, wherein Figure 10It is an enlarged schematic view of the part where the first seal 21 is connected to the second battery cell 102. The second side wall 28 includes two sub-walls arranged at intervals, and each sub-wall contacts the inner wall 108 of one of the battery cells 10. In this embodiment, the second side wall 28 is set as two specifically spaced sub-walls, one sub-wall contacts the inner wall 108 of the first battery cell 101, and the other sub-wall contacts the inner wall 108 of the second battery cell 102. It can be understood that in the present application, the second side wall 28 is arranged between two battery cells, and a liquid cooling component 500 can also be arranged between the two battery cells. By setting the second side wall 28 as two parallel sub-walls, the liquid cooling component 500 can pass through the two sub-walls to be connected to an external structure, etc. The interval between the two sub-walls can be used to fix the liquid cooling component 500, improve the fixing effect of the first seal 15, prevent the first seal 15 from moving during the welding of the first connector 14, and improve the sealing effect and welding effect. Further, in order to improve the fixing effect, the second side wall 28 is in interference fit with the gap between the battery cell 10 and the adjacent battery cell 10.

[0093] It should be further noted that in the embodiments of the present application, by providing a seal 300 for each connector 200 to seal the connector 200, the sealing effect of the connector 200 can be improved. In addition, it can also prevent the seal 300 from affecting the sealing effect under the action of welding beads or welding heat during the welding process of the connector 200. In addition, during the welding process, the positioning accuracy between the electrode of the battery and the connector 200 is insufficient, which easily leads to welding position deviation, resulting in a decrease in welding strength, affecting the connection effect, and causing a decrease or even failure in the performance of the battery cell module. Each seal 300 is individually positioned to prevent the seal 300 from affecting the welding accuracy of the connector 200 due to movement or positioning errors, etc., improve the welding strength, and reduce the problems caused by welding offset. In addition, by providing the first side wall 27 and the second side wall 28 on the seal 300, the way of using additional connectors 200 in the seal 20 and the battery module 100 can be cancelled, simplifying the installation and preventing battery damage.

[0094] Embodiment 2

[0095] As Figures 11-12 shown, the connector 200 includes a second connector 16 in an L shape. The second connector 16 includes a first connection portion 301 fixedly connected to the pole 13 of one of the battery cells 10 and a second connection portion 302 perpendicular to the first connection portion 301. A connection terminal 90 for realizing electrical connection is provided on the second connection portion 302.

[0096] In this embodiment, the second connector 16 can be applied to the electrical connection between battery cells 10 inside the battery module 100, can also be applied to the electrical connection between battery modules 100, or can be applied to the electrical connection between the battery module 100 and other electrical components. The present application does not limit this.

[0097] The first connection portion 301 is used for fixedly connecting with the upper pole 13 of the battery cell 10, can realize the electrical connection between the first connection portion 301 and the battery cell 10, and at the same time can also realize the fixed connection between the second seal 17 and the battery cell 10. Through the second connection, the second seal body 24 is pressed tightly on the battery cell 10. The first connection portion 301 and the pole 13 bracket can be fixedly connected by welding. The second connection portion 302 is provided with connection terminals 90 for electrically connecting with other battery cells 10, other battery modules 100 or other electrical components.

[0098] Both the first connection portion 301 and the second connection portion 302 can be formed as plate members. The first connection portion 301 and the second connection portion 302 can be perpendicular. The first connection portion 301 is used for welding with the pole 13, and the second connection portion 302 is used for electrically connecting with other external electrical components. It can be understood that the second connection portion 302 can be used for electrically connecting with other battery cells 10 in the battery module 100 to realize series or parallel batteries.

[0099] In the embodiment of the present application, the end of the second connection portion 302 is bent towards the direction close to the second groove 26 to form an abutting portion 303. The abutting portion 303 and the second connection portion 302 form an angle, and the abutting portion 303 abuts against the second surface 205 of the second groove 26. When connecting the second connection piece, external tooling support is required to ensure the reliability of welding. In this regard, the abutting portion 303 on the second connection portion 302 can play a role in supporting the second seal body 24 and reduce external tooling support; when the second connector 16 is welded, the second connection portion 302 can continue to press the second seal body 24 to achieve a fixing effect.

[0100] In the embodiment of the present application, the setting manner of the connection terminals 90 on the second connection portion 302 is not limited. The connection terminals 90 can be terminal posts protruding outside the second seal cover 25, or can be in the form of connection holes. In the present application, it is shown that there are two connection threaded holes provided on the second connection portion 302. When wiring, connection bolts can be used to achieve fixation and electrical connection through the threads on the connection threaded holes. By connecting the second connection portion 302 only at one end to the battery pole 13 in the form of the connection terminals 90, problems such as alignment accuracy, welding accuracy, and sealing accuracy generated when the battery pole 13 is welded to the connector 200 can be avoided, and the electrical connection effect can be improved.

[0101] Such asFigures 13-17 As shown, the seal 300 includes a second seal 17, and the second seal 17 includes a second seal body 24 and a second seal cover 25, where Figure 13 in part B, the second seal cover 25 is removed. A second groove 26 for accommodating the second connecting member 16 is provided on the second seal body 24. The through hole 70 includes a third through hole 304 provided on the second groove 26 and adapted to the pole 13 of the battery cell 10. The second sealing ring 50 includes a third sub-sealing ring 503 disposed around the third through hole 304.

[0102] In the embodiment of the present application, by providing the second groove 26 on the second seal 17 to accommodate the second connecting member 16, the second connecting member 16 is sealed, so that the second connecting member 16 is isolated from the air in the battery module 100, preventing the condensed water during the cooling of the water vapor in the air from contacting the connecting member 200 during the cooling of the battery module 100, and preventing the short circuit problem of the second connecting member 16 caused by heat dissipation problems; it can also prevent the housing 11 of the battery cell 10 from directly contacting the connecting member 200, and forming an effective insulation protection between the connecting member 200 and the housing 11 of the battery cell 10.

[0103] Among them, as Figures 14-15 shown, the second groove 26 includes a first recess 305 for accommodating the first connecting portion 301 and a second recess 306 for accommodating the second connecting portion 302. The first recess 305 and the second recess 306 are vertically arranged, and the third through hole 304 is provided on the first recess 305.

[0104] In this embodiment, the first recess 305 includes a first inner surface 307 and a second inner surface 308 which are oppositely arranged. The first inner surface 307 is used to place the second connecting portion 302, and the second inner surface 308 is used to arrange the third sub-sealing ring 503. The second inner surface 308 contacts the battery cell 10. After the second connecting member 16 is welded to the battery pole 13, the sealing effect of the second seal 17 can be improved by compressing the third sub-sealing ring 503. In the embodiment of the present application, the setting method of the third sub-sealing ring 503 and the third through hole 304 can refer to the setting method in the first embodiment, and will not be elaborated here one by one.

[0105] Optionally, as Figures 16-17As shown, the second sealing cover 25 includes a first cover body 309 that mates with the first recess 305 and a second cover body 310 that mates with the second recess 306; a through portion 80 that mates with the connection terminal 90 is provided on the second cover body 310, and a third sealing ring 60 surrounding the through portion 80 is provided between the second sealing cover 25 and the connection terminal 90. The second sealing body 24 and the second sealing member 17 can be fixedly connected by fixing members such as bolts, facilitating the inspection and replacement of the second connecting member 16; a first sealing ring 40 is provided between the second sealing body 24 and the second sealing cover 25. When the second sealing body 24 and the second sealing cover 25 are fixedly connected, by compressing the first sealing ring 40, the sealing effect of the second sealing member 17 can be improved.

[0106] As Figure 18 A partially enlarged schematic view of the battery assembly shown in the figure, where the second sealing cover 25 is removed at C in the figure. In this embodiment, the through portion 80 on the second sealing cover 25 is used to achieve the external electrical connection function. In different embodiments, according to the structure or shape of the connection terminal 90, the structure and shape of the through portion 80 can also be different. For example, two wiring through holes are provided on the second connecting portion 302 shown in the present application, and the shape of the through portion 80 can be circular or square, etc., as long as the connection terminal 90 is exposed. To improve the sealing effect at the position of the through portion 80, a third sealing ring 60 is provided on the surface of the second sealing cover 25 facing the second connecting member 16. When the second sealing cover 25 is fixed, the third sealing ring 60 is pressed against the second connecting portion 302 of the second connecting member 16, and the sealing effect of the second sealing member 17 can be improved by compressing the third sealing ring 60. In this embodiment, the third sealing ring 60 is fixedly provided through the second mounting hole, where the second mounting hole is provided around the through portion 80, and the cross-sectional area of the second mounting hole is larger than the cross-sectional area of the through portion 80, that is, the second mounting hole surrounds the through portion 80.

[0107] For example, when the second connecting member 16 is used to achieve electrical connection between two adjacent battery cells 10 (the first battery cell 101 and the second battery cell 102), the second connecting member 16 and other second connecting members 16 are electrically connected through an adapter 400 that mates with the connection terminal 90, as Figure 19 shown.

[0108] A second connecting member 16 and a second sealing member 17 that mates with the second connecting member 16 are provided on both the first battery cell 101 and the second battery cell 102. The second connecting member 16 is fixedly connected to the pole 13 of the corresponding battery cell 10, and the second connecting member 16 on the first battery cell 101 and the second connecting member 16 on the second battery cell 102 are electrically connected through an adapter 400.

[0109] For example, the adapter 400 is disposed outside the second sealing cover 25. The adapter 400 is provided with a connection hole, and the second connector 16 is provided with a connection terminal 90 that mates with the connection hole. The connection terminal 90 is a threaded connection hole for wiring. The adapter 400 is pressed against the second sealing cover 25 by a wiring bolt and the wiring thread. Electrical connection between two adjacent second connectors 16 can be achieved through the wiring bolt and the adapter 400. By adopting a mechanical fixing method, problems such as welding accuracy and sealing accuracy caused by the welding method can be avoided. In addition, the adapter 400 can also improve the connection strength between the second seal 17 and the battery cell 10.

[0110] It can be understood that the structure of the adapter 400 is not limited in the embodiments of the present application. In different embodiments, different structures and connection methods with the second connector 16 can be adopted according to different application scenarios. For example, the adapter can be linear or angular.

[0111] To further achieve the welding positioning and connection positioning functions of the second seal 17, the battery cell 10 includes an outer wall 107, an inner wall 108, and a top surface 109 that are perpendicular to each other in pairs. The second connector 16 is disposed on the top surface 109. A gap is provided between the battery cell 10 and an adjacent battery cell 10 at the position of the inner wall 108. The inner surface 31 of the second recess 306 contacts the outer wall 107 of the battery cell 10. The third through hole 304 and the third sub-seal ring 503 are disposed on the inner surface 31. The second seal 17 is further provided with a third side wall 30 that contacts the inner wall 108 of the battery cell 10.

[0112] In this embodiment, by contacting the side surface of the second sealing body 24 with the outer wall 107 of the battery cell 10 and contacting the third side wall 30 with the inner wall 108 of the battery cell 10, the positioning of the second sealing body 24 can be facilitated. By disposing the third side wall 30 in the gap between two battery cells 10, the third side wall 30 can be clamped by two battery cells 10 to prevent the second seal 17 from moving, etc. Especially before the second connector 16 is welded, the movement of the second sealing body 24 can be avoided from affecting the welding accuracy or sealing accuracy, etc. Optionally, the third side wall 30 is in interference fit with the gap between the battery cell 10 and an adjacent battery cell 10, and the fixing effect is improved through the interference fit.

[0113] It can be understood that in the embodiments of the present application, both the first connector 14 and the second connector 16 can achieve electrical connection between battery cells in the battery module 100, and can be selected according to needs in specific applications. The second connector 16 can also achieve external output of the battery module 100.

[0114] Specifically, such asFigure 2 As shown, two adjacent battery cells 10 in the battery module 100 are electrically connected through a first connecting member 14. The battery module 100 includes a first output terminal 18 and a second output terminal 19, and second connecting members 16 are respectively arranged on the first output terminal 18 and the second output terminal 19 for realizing the electrical connection of the battery module 100.

[0115] It can be understood that the first output terminal 18 can be connected to the positive electrode of the battery cell and is electrically connected to other battery modules 100 or other electrical components through the second connecting member 16, so that the first output terminal 18 forms the positive electrode of the battery module 100, and the second output terminal 19 is directly connected to the negative electrode of the battery cell, so that the second output terminal 19 forms the negative electrode of the battery module 100. Of course, the first output terminal 18 and the second output terminal 19 can be interchanged.

[0116] The number of battery cells 10 in the battery module 100 can be multiple, and the number of connecting members 200 on the battery module 100 can be one or more. For example, the battery module 100 includes 4 battery cells 10 arranged in an array. The electrical connection mode between the battery cells 10 can all adopt the first connecting member 14 and the first sealing member 15 for sealing the first connecting member 14, or can all adopt the second connecting member 16 and the second sealing member 17 for sealing the second connecting member 16.

[0117] In some embodiments, in order to improve the mechanical automation effect, the second connecting members 16 are arranged on the electrodes on the same side of the first output terminal 18 and the second output terminal 19, as Figure 20 shown, that is, the same side of the battery module 100 is all the second connecting members 16, and the other side is all the first connecting members 14. For the second connecting members 16 on the same side, the same fixing process can be adopted, such as the welding process or the connecting terminal 90 process.

[0118] In this embodiment, the high-voltage wire harness 600 for connecting the wiring between the connecting pieces can be arranged inside the sealing body 20, or can pass through the gap between the sealing members 300. This reduces the probability of short circuit and fire caused by the high-voltage wire harness 600 being squeezed, and also reduces the layout difficulty of the high-voltage wire harness 600, reduces the wiring length of the high-voltage wire harness 600, saves the production cost of the battery module 100, and reduces the weight of the battery module 100.

[0119] Based on the same inventive concept, the present application also provides a battery pack, and the battery pack includes the battery assembly as described above.

[0120] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention 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. Therefore, it should not be construed as a limitation to the present invention.

[0121] In addition, the terms "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0122] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. Terms such as "disposed" as used herein may mean that a component is directly attached to another component or that a component is attached to another component through an intermediate member. Features described in one embodiment herein may be applied alone or in combination with other features in another embodiment, unless the feature is not applicable or otherwise stated in that other embodiment.

[0123] The present invention has been described by the above embodiments, but it should be understood that the above embodiments are only for the purpose of illustration and example, and are not intended to limit the present invention to the scope of the described embodiments. Those skilled in the art can understand that more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the scope claimed by the present invention.

Claims

1. A battery component, characterized in that, Comprising: At least one battery module, each of the battery modules including a plurality of battery cells; A connecting member disposed on the battery cell for electrically connecting the plurality of battery cells; A sealing member disposed on the battery cell, the sealing member including a sealing body and a sealing cover, and the connecting member being disposed in a sealed space formed by the sealing body and the sealing cover; A terminal post is provided on the battery cell, a through hole for the terminal post to pass through is provided on the sealing body, a first sealing ring is provided between the sealing body and the sealing cover, and a second sealing ring surrounding the through hole is provided between the sealing body and the battery cell to form a seal between the sealing body and the battery cell at the through hole.

2. The battery assembly according to claim 1, wherein, The connecting member includes a first connecting member for connecting the terminal post of one battery cell in the battery module and the terminal post of another battery cell; The sealing member includes a first sealing member that cooperates with the first connecting member, the first sealing member including a first sealing body and a second sealing cover, and a first groove for accommodating the first connecting member is provided on the first sealing body; The through hole includes a first through hole and a second through hole arranged side by side on the first groove, the first through hole cooperating with the terminal post of one battery cell, and the second through hole cooperating with the terminal post of another battery cell; The second sealing ring includes a first sub-sealing ring surrounding the first through hole and a second sub-sealing ring surrounding the second through hole.

3. The battery assembly according to claim 2, wherein, The battery cell includes outer walls, inner walls, and a top surface that are perpendicular to each other in pairs, the first connecting member is disposed on the top surface, and a gap is provided between the battery cell and an adjacent battery cell at the position of the inner wall; The first sealing member is provided with a first side wall, a second side wall, and a bottom surface that are perpendicular to each other in pairs, the first side wall contacts the outer wall of the battery cell, the second side wall contacts the inner wall of the battery cell, and the first through hole and the second through hole are provided on the bottom surface.

4. The battery assembly according to claim 3, wherein, The second side wall includes two sub-walls arranged at intervals, and each sub-wall contacts the inner wall of one battery cell.

5. The battery assembly according to claim 3, wherein, The second side wall is in interference fit with the gap between two adjacent battery cells.

6. The battery assembly according to claim 4, wherein, A liquid cooling component is provided in the gap between the battery cell and an adjacent battery cell, and the liquid cooling component is provided between the two sub-walls of the second side wall.

7. The battery component according to claim 1, wherein, The connecting member includes a second connecting member, the second connecting member including a first connecting portion fixedly connected to the terminal post of one battery cell and a second connecting portion perpendicular to the first connecting portion, and a connection terminal for achieving electrical connection is provided on the second connecting portion; The sealing member includes a second sealing member that cooperates with the second connecting member, the second sealing member including a second sealing body and a second sealing cover, and a second groove for accommodating the second connecting member is provided on the second sealing body; The through hole includes a third through hole provided on the second groove and cooperating with the terminal post of the battery cell; The second sealing ring includes a third sub-sealing ring disposed around the third through hole.

8. The battery assembly according to claim 7, wherein The second groove includes a first recess for accommodating the first connecting portion and a second recess for accommodating the second connecting portion. The first recess and the second recess are vertically disposed, and the third through hole is disposed in the first recess.

9. The battery assembly according to claim 8, characterized in that, The second sealing cover includes a first cover body that mates with the first recess and a second cover body that mates with the second recess; a through portion that mates with the connection terminal is disposed on the second cover body, and a third sealing ring surrounding the through portion is disposed between the second sealing cover and the connection terminal.

10. The battery assembly according to claim 9, wherein, The battery cell includes outer walls, inner walls, and a top surface that are perpendicular to each other in pairs. The first connecting member is disposed on the top surface, and a gap is provided between the battery cell and an adjacent battery cell at the position of the inner wall. The inner surface of the second recess contacts the outer wall of the battery cell, and a third side wall that contacts the inner wall of the battery cell is further disposed on the second sealing member.

11. The battery assembly according to claim 10, wherein, The third side wall is in interference fit with the gap between two adjacent battery cells.

12. The battery assembly according to claim 7, wherein, The second connecting members are electrically connected to each other through an adapter that mates with the connection terminal.

13. The battery assembly according to claim 1, characterized in that, In the battery module, adjacent battery cells are electrically connected through a first connecting member. The battery module includes a first output terminal and a second output terminal, and second connecting members are respectively disposed on the first output terminal and the second output terminal to achieve electrical connection of the battery module.

14. A battery pack, characterized in that, Comprising the battery assembly according to any one of claims 1-13.

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