Module upper cover, battery module and electric vehicle

Abstract

The embodiment of the utility model provides a module upper cover, a battery module and an electric vehicle, and relates to the technical field of batteries. The module upper cover comprises an upper cover body and a first positioning column, wherein a plurality of battery cell fixing holes are formed in one side of the upper cover body; a plurality of busbar mounting grooves are formed in one side, deviating from the battery cell fixing holes, of the upper cover body; and a first positioning column is arranged in the busbar mounting groove and is used for fixing the nickel sheet. The battery cell fixing holes are formed, and the battery cells are arranged in the battery cell fixing holes, so that the battery cells are convenient to mount and fix. And by arranging the busbar mounting groove, the mounting position of the busbar can be conveniently limited, so that the accuracy of the welding position of the busbar and the battery cell tab is ensured. By arranging the first positioning column, the nickel sheet can be fixed on the module upper cover, the nickel sheet is located between the busbar and the module upper cover, and after the busbar is welded, welding of the nickel sheet is continuously completed through a welding bead for welding the busbar. The welding process is simplified, the assembly time of the module is shortened, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a module upper cover, a battery module and an electric vehicle. Background Art

[0002] The battery module connects the positive and negative electrodes of multiple single cells in series through a busbar to achieve the designed voltage and power. At the same time, the voltage of each cell is collected by welding the cell collection nickel sheet between the cells to monitor the health status of the battery module. The existing cell collection nickel sheet is laser welded on the busbar.

[0003] However, at present, because the welding pressure head of the busbar is different from that of the nickel sheet, and the required laser welding power is also different, two different devices are needed, divided into two processes: first welding the busbar and then welding the nickel sheet. Therefore, a lot of welding time is required, which affects the production efficiency of the battery module. Utility Model Content

[0004] The utility model provides a module upper cover, a battery module and an electric vehicle, which can simplify the welding process and the assembly process, reduce the assembly time of the battery module and improve the production efficiency.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] An embodiment of the utility model provides a module upper cover, which includes:

[0007] An upper cover body, wherein a plurality of battery cell fixing holes are provided on one side of the module upper cover body; a plurality of bus bar mounting grooves are provided on a side of the upper cover body away from the battery cell fixing holes;

[0008] A first positioning column is provided in the busbar mounting groove, and the first positioning column is used to fix the nickel sheet.

[0009] A plurality of battery cell fixing holes are provided on one side of the module upper cover; a plurality of bus bar installation grooves are provided on a side of the module upper cover away from the battery cell fixing holes;

[0010] A first positioning column is arranged in the busbar installation groove, and the first positioning column is used to fix the nickel sheet.

[0011] In an optional embodiment, at least one of the busbar mounting grooves includes a first side wall, a second side wall, a third side wall and a fourth side wall connected in sequence, and a notch is formed on the first side wall, and the notch is used to install the wiring harness of the nickel sheet.

[0012] In an optional embodiment, the positioning column is in the shape of an ellipsoid.

[0013] In an optional embodiment, an axis of the first positioning column is arranged at an angle to the first side wall.

[0014] In an optional implementation, a limiting member is provided in the busbar mounting groove, and the limiting member is used to limit the nickel sheet to prevent the nickel sheet from rotating.

[0015] In an optional embodiment, a second positioning column is provided in the busbar installation groove, and the second positioning column is used to fix the busbar.

[0016] In an optional implementation manner, the upper cover body is further provided with a wiring channel on one side of the busbar mounting groove.

[0017] In an optional embodiment, a plurality of groups of wire harness restraints are arranged at intervals on both side walls of the wiring channel, and each group of the wire harness restraints is used to limit the position of the wire harness.

[0018] The embodiment of the utility model further provides a battery module, comprising the module upper cover, module bottom plate, multiple bus bars, multiple nickel sheets and multiple battery cells as described in any of the above embodiments, wherein the multiple battery cells are installed between the module upper cover and the module bottom plate; each of the battery cells is correspondingly installed in one of the battery cell fixing holes;

[0019] A first positioning hole is formed on each of the nickel sheets, and the first positioning hole cooperates with the first positioning column. The nickel sheet is located between the bus bar and the module upper cover.

[0020] An embodiment of the utility model further provides an electric vehicle, comprising the battery module in the above embodiment.

[0021] The beneficial effects of the module upper cover, battery module and electric vehicle of the embodiment of the utility model include:

[0022] The module upper cover includes an upper cover body and a first positioning column, and a plurality of battery cell fixing holes are provided on one side of the upper cover body. By providing the battery cell fixing holes, the battery cells are provided in the battery cell fixing holes, which facilitates the installation and fixing of the battery cells. A plurality of bus bar mounting grooves are provided on the side of the upper cover body away from the battery cell fixing holes. By providing the bus bar mounting grooves, it is convenient to limit the installation position of the bus bar, thereby ensuring the accuracy of the welding position between the bus bar and the battery cell tabs. In addition, a first positioning column is provided in the bus bar mounting groove of the module upper cover, and the first positioning column is used to fix the nickel sheet. By providing the first positioning column, the nickel sheet can be fixed on the module upper cover, and the nickel sheet is located between the bus bar and the module upper cover. After welding the bus bar, the weld bead of the welding bus bar can be used to continue to complete the welding of the nickel sheet. The welding process is simplified, the assembly time of the battery module is reduced, and the production efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of a battery module provided in an embodiment of the present utility model;

[0025] Figure 2 A battery module with the bus bar removed provided in an embodiment of the utility model;

[0026] Figure 3 A schematic diagram of a first viewing angle of a module upper cover provided in an embodiment of the utility model;

[0027] Figure 4 A schematic diagram of a second viewing angle of a module upper cover provided in an embodiment of the utility model;

[0028] Figure 5 It is a partial enlarged schematic diagram of point A provided in an embodiment of the utility model;

[0029] Figure 6 It is a schematic diagram of a bus provided in an embodiment of the present utility model.

[0030] Icons: 1000-battery module; 100-module cover; 110-cover body; 111-cell fixing hole; 112-bus mounting groove; 1121-first side wall; 11211-notch; 1122-second side wall; 1123-third side wall; 1124-fourth side wall; 120-first positioning column; 130-limiting piece; 140-second positioning column; 150-wiring channel; 151-wiring restraint; 160-cell explosion-proof valve hole; 170-installation part; 200-module bottom plate; 300-bus; 310-second positioning hole; 400-nickel sheet; 410-first positioning hole; 500-cell. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0034] In the description of the present utility model, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present utility model.

[0035] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0036] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0037] The battery module connects the positive and negative electrodes of multiple single cells in series through a bus to achieve the designed voltage and power. At the same time, the voltage of each cell is collected by welding the cell collection nickel sheet between the cells to monitor the health status of the battery module. The existing cell collection nickel sheet is welded on the bus by laser. However, at present, because the welding pressure head of the bus is different from the welding pressure head of the nickel sheet, and the required laser welding power is also different, two different equipment are required, which is divided into two processes: first weld the bus and then weld the nickel sheet. Therefore, a lot of welding time is required, which affects the production efficiency of the battery module.

[0038] Based on this, see Figure 1 , Figure 2 and Figure 3The module cover 100 provided in the embodiment of the utility model can effectively improve the technical problems mentioned above. The module cover 100 can simplify the welding process and the assembly process, reduce the assembly time of the battery module 1000, and improve production efficiency. The module cover 100 provided in the embodiment of the utility model is applied to the battery module 1000, and the battery module 1000 can be applied to electric machinery such as automobiles. The battery module 1000 and electric machinery such as electric vehicles having the module cover 100 have the same functions as the above-mentioned module cover 100, which will not be described in detail here.

[0039] The electric vehicle provided in this embodiment includes a vehicle body and a battery module 1000. The battery module 1000 is disposed in the vehicle body. The battery module 1000 provides electrical energy to the vehicle body to realize various functions of the vehicle body.

[0040] The structure of the battery module 1000 is described in detail below.

[0041] Figure 1 A schematic diagram of a battery module 1000 provided in an embodiment of the present utility model; Figure 2 The battery module 1000 provided in the embodiment of the present utility model without the bus bar 300 is as follows: Figure 1 and Figure 2 As shown, the battery module 1000 in this embodiment includes a module cover 100, a module bottom plate 200, a plurality of busbars 300, a plurality of nickel sheets 400 and a plurality of battery cells 500, wherein the plurality of battery cells 500 are installed between the module cover 100 and the module bottom plate 200; each battery cell 500 is correspondingly installed in a battery cell fixing hole 111. A first positioning hole 410 is provided on each nickel sheet 400, and the first positioning hole 410 cooperates with the first positioning column 120, and the nickel sheet 400 is located between the busbar 300 and the module cover 100.

[0042] One end of the battery cell 500 is connected to the module cover 100, and the other end of the battery cell 500 is connected to the module bottom plate 200. In order to aggregate multiple battery cells 500 and realize the collection, distribution and derivation of current, each busbar 300 electrically connects two adjacent battery cells 500. In order to monitor the status of each battery cell 500, a nickel sheet 400 needs to be welded at the end of the battery cell 500 to collect the voltage of each battery cell 500 and monitor the health status of the battery module 1000. The busbar 300 in this embodiment is installed on the module cover 100, and part of the busbar 300 is welded to the tab of the battery cell 500. A nickel sheet 400 is arranged between the busbar 300 and the tab of the battery cell 500, and part of the nickel sheet 400 is also welded to the tab of the battery cell 500. The busbar 300 and the nickel sheet 400 are both fixed in welding position by the module cover 100.

[0043] In addition, the battery module 1000 may also include other structural components such as a liquid cooling system and end plates to achieve other functions of the battery module 1000, which is determined according to actual usage requirements and is not limited here.

[0044] The specific structure of the module upper cover 100 will be described in detail below.

[0045] Figure 3 It is a partial enlarged schematic diagram of point A provided in an embodiment of the utility model; Figure 4 A schematic diagram of a first viewing angle of a module upper cover 100 provided in an embodiment of the present utility model; Figure 5 This is a schematic diagram of a second viewing angle of the module cover 100 provided in an embodiment of the present utility model. Figure 4 and Figure 5 , and combined with Figure 3 The module upper cover 100 in this embodiment includes an upper cover body 110 and a first positioning column 120, and a plurality of battery cell fixing holes 111 are provided on one side of the upper cover body 110. By providing the battery cell fixing holes 111, the battery cell 500 is provided in the battery cell fixing holes 111, which facilitates the installation and fixing of the battery cell 500. A plurality of busbar mounting grooves 112 are provided on the side of the upper cover body 110 away from the battery cell fixing holes 111. By providing the busbar mounting grooves 112, it is convenient to limit the installation position of the busbar 300, thereby ensuring the accuracy of the welding position of the busbar 300 and the battery cell 500 tabs. In addition, a first positioning column 120 is provided in the busbar mounting groove 112 of the module upper cover 100, and the first positioning column 120 is used to fix the nickel sheet 400. By providing the first positioning column 120, the nickel sheet 400 can be fixed on the module upper cover 100, and the nickel sheet 400 is located between the busbar 300 and the module upper cover 100. After welding the busbar 300, the weld of the busbar 300 can be used to continue welding the nickel sheet 400. The welding process is simplified, the assembly time of the battery module 1000 is reduced, and the production efficiency is improved.

[0046] Since the upper cover body 110 in this embodiment is arranged with a plurality of battery cell fixing holes 111 in an array, and each battery cell fixing hole 111 is provided with a battery cell 500, in order to allow the busbar 300 to be welded with the tab of each battery cell 500, Figure 6 The schematic diagram of the bus bar 300 provided in the embodiment of the utility model is shown in FIG. Figure 4 and Figure 5 , and combined with Figure 6, the multiple bus mounting grooves 112 in this embodiment are connected in sequence to form a circuitous "bow" shape or snake shape. The setting positions of the multiple bus mounting grooves 112 are determined according to the installation positions of the battery cells 500 on the upper cover body 110, as long as it is ensured that the bus 300 can be welded to the pole ears of the battery cells 500. The setting position of the bus mounting groove 112 is not limited here. The bus mounting groove 112 in this embodiment is rectangular, but of course it can also be square, circular or other irregular shapes, etc., which are not limited here. The shape of the bus mounting groove 112 is determined according to the shape of the specific bus 300 used, as long as the bus 300 can be limited and fixed.

[0047] To facilitate the wiring and connection of the nickel sheet 400 wiring harness, please continue to refer to Figure 4 , and combined with Figure 2 and Figure 3 In this embodiment, at least one busbar installation slot 112 includes a first side wall 1121, a second side wall 1122, a third side wall 1123 and a fourth side wall 1124 connected in sequence. A notch 11211 is provided on the first side wall 1121, and the notch 11211 is used to install the wiring harness of the nickel sheet 400. The collection wiring harness connected to the nickel sheet 400 is led out of the busbar installation slot 112 from the notch 11211 to prevent the collection wiring harness from occupying too much space. The notch 11211 in this embodiment is rectangular, and of course the shape of the notch 11211 can also be square, circular or other shapes, which are not limited here.

[0048] In order to prevent the nickel sheet 400 from moving forward, backward, left, and right along the surface of the upper cover body 110, please refer to Figure 4 and Figure 5 , and combined with Figure 3 , the shape of the first positioning column 120 in this embodiment is an ellipsoid. In order to facilitate the welding of the nickel sheet 400 and to facilitate the collection harness connected to the nickel sheet 400 to be led out from the notch 11211 of the first side wall 1121, the axis of the first positioning column 120 in this embodiment is set at an angle to the first side wall 1121. Of course, the first positioning column 120 can also be other shapes such as round, square, rectangular, waist-shaped, etc., which are not limited here. The setting position and direction of the first positioning column 120 can be determined according to the specific wiring arrangement, which is not limited here.

[0049] Also, see Figure 4 and Figure 5In the present embodiment, the upper cover body 110 is also provided with a wiring channel 150 on one side with the bus mounting groove 112. The collection harness is installed in the wiring channel 150 to reduce the occupation of the longitudinal space of the battery module 1000 and improve the space utilization. In order to prevent the wiring harness from running around, a plurality of groups of wiring harness restraints 151 are arranged on the two side walls of the wiring channel 150 in the present embodiment, and each group of wiring harness restraints 151 is used to limit the position of the wiring harness. Specifically, the wiring harness restraint 151 in the present embodiment includes a first limiting plate and a second limiting plate, which are arranged opposite to each other and are both located above the wiring channel 150. Of course, the wiring harness restraint 151 can also be designed as other structural forms such as a buckle form, as long as it can prevent the wiring harness from running around, and it is not limited here.

[0050] In order to prevent the nickel sheet 400 from rotating during the welding process, a limiting member 130 is provided in the busbar mounting groove 112 in the present embodiment, and the limiting member 130 is used to limit the nickel sheet 400 to prevent the nickel sheet 400 from rotating. The limiting member 130 in the present embodiment includes a first limiting block and a second limiting block, and the first limiting block and the second limiting block are arranged close to the first positioning column 120, and the first limiting block and the second limiting block are arranged correspondingly to form a limiting channel for the nickel sheet 400 together. The nickel sheet 400 is sleeved in the first positioning column 120, and is clamped between the first limiting block and the second limiting block to prevent the nickel sheet 400 from moving or rotating along the plane of the upper cover body 110 during the welding process. The first limiting block in the present embodiment is a rectangular block. In order to prevent the nickel sheet 400 from moving up and down in the plane where the upper cover body 110 is located, the second limit block in this embodiment is "L"-shaped, including a body and a protruding block. The body is arranged opposite to the first limit block, and the protruding block is connected to the body and is located above the limit channel of the nickel sheet 400. The protruding block is used to limit the up and down movement of the nickel sheet 400. Of course, the limit member 130 can also be designed as other structural shapes, such as a buckle form, which is engaged with the nickel sheet 400. As long as the limit member 130 can limit the rotation of the nickel sheet 400 and prevent it from moving, the specific design of the structural form is not limited here.

[0051] Please continue reading Figure 4 , and combined with Figure 1 In this embodiment, a second positioning column 140 is provided in the busbar installation groove 112, and the second positioning column 140 is used to fix the busbar 300. By providing the second positioning column 140, the busbar 300 is provided with a second positioning hole 310 to cooperate with the second positioning column 140, so that the installation position of the busbar 300 can be fixed, and the busbar 300 can be quickly assembled for welding.

[0052] See also Figure 4 and Figure 5, in order to automatically open the pressure relief when the internal pressure of the battery is too high, to prevent the battery from exploding and catching fire, thereby ensuring the safety performance of the battery. The upper cover body 110 in this embodiment is provided with a plurality of battery cell explosion-proof valve holes 160 to expose the explosion-proof valve of the battery cell 500, so that when high-temperature and high-pressure gas is generated inside the battery cell 500, it is discharged in time, thereby effectively preventing the occurrence of explosion. In addition, in order to facilitate the installation of the battery module 1000 and the external structure, the edge of the upper cover body 110 in this embodiment is also connected to a plurality of mounting parts 170, and the plurality of mounting parts 170 are all used to connect with other structural parts. The mounting part 170 in this embodiment is provided with a plurality of connection holes, and a plurality of reinforcing ribs are provided to improve the connection strength.

[0053] In summary, the module upper cover 100 includes an upper cover body 110 and a first positioning column 120. A plurality of battery cell fixing holes 111 are provided on one side of the upper cover body 110; a plurality of busbar mounting grooves 112 are provided on the side of the upper cover body 110 away from the battery cell fixing holes 111; a first positioning column 120 is provided in the busbar mounting groove 112, and the first positioning column 120 is used to fix the nickel sheet 400. By providing the battery cell fixing holes 111, the battery cell 500 is provided in the battery cell fixing holes 111, which facilitates the installation and fixing of the battery cell 500. By providing the busbar mounting groove 112, the installation position of the busbar 300 can be easily limited, thereby ensuring the accuracy of the welding position of the busbar 300 and the battery cell 500 tab. By providing the first positioning column 120, the nickel sheet 400 can be fixed on the module upper cover 100, and the nickel sheet 400 is located between the busbar 300 and the module upper cover 100. After welding the busbar 300, the weld of the busbar 300 can be used to continue welding the nickel sheet 400. The welding process is simplified, the assembly time of the battery module 1000 is reduced, and the production efficiency is improved.

[0054] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A module cover, characterized in that: An upper cover body (110), wherein a plurality of battery cell fixing holes (111) are provided on one side of the upper cover body (110); and a plurality of busbar mounting grooves (112) are provided on a side of the upper cover body (110) away from the battery cell fixing holes (111); A first positioning column (120), wherein the busbar mounting groove (112) is provided with a first positioning column (120), and the first positioning column (120) is used to fix the nickel sheet (400).

2. The module cover according to claim 1, characterized in that: At least one of the busbar mounting grooves (112) comprises a first side wall (1121), a second side wall (1122), a third side wall (1123) and a fourth side wall (1124) connected in sequence, and a notch (11211) is provided on the first side wall (1121), and the notch (11211) is used to install a wiring harness of the nickel sheet (400).

3. The module cover according to claim 2, characterized in that: The first positioning column (120) is in the shape of an ellipsoid.

4. The module cover according to claim 3, characterized in that: The axis of the first positioning column (120) is arranged at an angle with the first side wall (1121).

5. The module cover according to claim 1, characterized in that: A limiting member (130) is arranged in the busbar installation groove (112), and the limiting member (130) is used to limit the nickel sheet (400) to prevent the nickel sheet (400) from rotating.

6. The module cover according to claim 1, characterized in that: A second positioning column (140) is arranged in the busbar installation groove (112), and the second positioning column (140) is used to fix the busbar (300).

7. The module cover according to claim 1, characterized in that: The upper cover body (110) is also provided with a wiring channel (150) on one side having the busbar mounting groove (112).

8. The module cover according to claim 7, characterized in that: Multiple groups of wire harness restraints (151) are arranged at intervals on both side walls of the wiring channel (150), and each group of wire harness restraints (151) is used to limit the position of the wire harness.

9. A battery module, characterized in that: The invention comprises a module upper cover (100) as claimed in any one of claims 1 to 8, a module bottom plate (200), a plurality of bus bars (300), a plurality of nickel sheets (400) and a plurality of battery cells (500), wherein the plurality of battery cells (500) are installed between the module upper cover (100) and the module bottom plate (200); each of the battery cells (500) is correspondingly installed in one of the battery cell fixing holes (111); Each of the nickel sheets (400) is provided with a first positioning hole (410), the first positioning hole (410) cooperates with the first positioning column (120), and the nickel sheet (400) is located between the bus bar (300) and the module upper cover (100).

10. An electric vehicle, characterized in that: Comprising the battery module (1000) as claimed in claim 9.

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