Battery cover plate, battery and vehicle

Abstract

The utility model discloses a battery cover plate, a battery and a vehicle, the battery cover plate comprises a substrate, a pole and a heat conduction piece, the substrate is provided with a through hole, the pole is arranged in the through hole in a penetrating manner, the pole is provided with a working surface and a welding surface which are opposite to each other along the axial direction of the through hole, the working surface is provided with a welding blind hole, and the heat conduction piece is arranged in the welding blind hole. The battery cover plate provided by the utility model has the advantage of good heat dissipation effect on the basis of preventing welding slag from being splashed and mixed into a battery.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, and in particular to a battery cover, a battery and a vehicle. Background Art

[0002] During the battery assembly process, the connection plate and the pole need to be welded. In order to avoid the risk of welding slag splashing onto the winding core and being brought into the shell when the welding of the above two is completed inside the battery, the relevant technology sets a welding hole on the outer surface of the pole, and then completes the welding of the pole and the connection plate at the welding hole through a welding device. However, the design of the welding hole makes the heat dissipation efficiency of the pole lower, and the pole is prone to excessive temperature rise during high-rate charging / discharging, affecting the safety of battery charging and discharging. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the utility model provides a battery cover plate, which has the advantages of preventing welding slag from splashing and mixing into the battery and having a good heat dissipation effect.

[0005] The embodiments of the present invention also provide a battery and a vehicle.

[0006] The battery cover plate of the embodiment of the utility model includes a substrate, a pole and a heat conductor, wherein the substrate is provided with a through hole; the pole is inserted into the through hole, and the pole has a working surface and a welding surface opposite to each other along the axial direction of the through hole, and a welding blind hole is provided on the working surface; the heat conductor is arranged in the welding blind hole.

[0007] According to the battery cover of the embodiment of the utility model, a welding blind hole is set on the working surface of the pole, so that the external welding device can complete the welding of the welding surface and the connecting piece inside the battery in the welding blind hole, ensuring that the welding slag generated during welding will not enter the battery and increase the risk of battery self-discharge and short circuit. At the same time, after the welding of the pole and the connecting piece is completed, the heat conductor is set in the welding blind hole, so that the heat conductor and the surface of the welding blind hole are in heat exchange contact. At this time, when the bus is connected to the pole, it will also be connected to the heat conductor and heat exchange contact will occur, and then the heat in the pole can be quickly transferred from the heat conductor to the bus, thereby effectively improving the heat dissipation efficiency of the pole, reducing the risk of excessive temperature rise of the battery, and improving the safety of battery charging and discharging.

[0008] In some embodiments, the heat conducting member includes a heat conducting adhesive bonded to the inner wall surface of the welding blind hole.

[0009] In some embodiments, the distance between the bottom surface of the welding blind hole and the welding surface is d1, wherein 0.5 mm≤d1≤1.5 mm.

[0010] In some embodiments, the pole comprises a first column provided with the welding surface and a second column provided with the working surface, the first column is loosely fitted in the through hole, a limiting groove is provided on the outer circumference of the first column, and the second column comprises a first convex edge protruding from the outer circumference of the first column, the first convex edge is located on a first side of the substrate opposite to the first direction, and the first direction is consistent with the thickness direction of the substrate;

[0011] The battery cover also includes a snap ring, which is sleeved on the first column and includes a first limiting portion and a second limiting portion, the first limiting portion is located on a second side of the substrate opposite to the first direction, and the second limiting portion is engaged in the limiting groove.

[0012] In some embodiments, the battery cover further includes a first plastic part and a second plastic part, wherein the first plastic part is connected between the flange and the base plate, and the second plastic part is connected between the clamping ring and the base plate.

[0013] In some embodiments, the battery cover further includes a sealing ring, which is sleeved on the first column and clamped between the convex edge and the base plate.

[0014] The battery according to an embodiment of the utility model comprises a winding core, a connecting piece and a battery cover as described in any of the above embodiments, wherein a pole ear is provided on the side of the winding core facing the pole, the pole ear is welded to the connecting piece, and the connecting piece is welded to the welding surface.

[0015] The technical advantages of the battery according to the embodiment of the utility model are the same as the technical advantages of the battery cover of the above embodiment, which will not be repeated here.

[0016] In some embodiments, the connecting sheet includes a first welding portion, a bending portion, and a second welding portion that are sequentially connected, the first welding portion is welded to the welding surface, and the second welding portion is welded to the tab.

[0017] In some embodiments, the pole ear is bent along a second direction relative to the winding core, the second direction is perpendicular to the axial direction of the through hole, and a receiving groove is defined between the pole ear and the winding core, the receiving groove has an opening facing the second direction, and a portion of the first welding portion is engaged in the receiving groove by the opening.

[0018] A vehicle according to an embodiment of the present invention includes a battery as described in the above embodiment.

[0019] The technical advantages of the vehicle according to the embodiment of the utility model are the same as the technical advantages of the battery cover and the battery in the above-mentioned embodiment, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of a battery according to an embodiment of the present utility model.

[0021] Figure 2 is an exploded diagram of a battery according to an embodiment of the utility model.

[0022] Figure 3 It is a cross-sectional view of a battery at a battery cover according to an embodiment of the utility model.

[0023] Figure 4 It is another cross-sectional view of the battery at the battery cover according to an embodiment of the utility model.

[0024] Figure 5 This is another cross-sectional view of the battery at the battery cover according to an embodiment of the utility model.

[0025] Figure 6 It is a top view of a battery cover at a pole ear according to an embodiment of the utility model, wherein a heat conducting member is hidden.

[0026] Figure 7 It is an exploded view of a battery cover according to an embodiment of the utility model.

[0027] Reference numerals:

[0028] 1. Base plate; 2. Pole; 21. First column; 211. Welding surface; 22. Second column; 221. Working surface; 222. Flange; 23. Welding blind hole; 24. Aluminum alloy part; 25. Copper part; 3. Heat conducting part; 4. Connecting piece; 41. First welding part; 42. Bending part; 43. Second welding part; 5. Winding core; 6. Pole ear; 61. Accommodating groove; 7. Snap ring; 71. First limiting part; 72. Second limiting part; 8. First plastic part; 9. Second plastic part; 10. Sealing ring; 110. Shell; 120. Explosion-proof valve; 130. Welding seam. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0030] Combine the following Figure 1-Figure 7 A battery cover according to an embodiment of the utility model is described.

[0031] The battery cover of the embodiment of the utility model comprises a substrate 1, a pole 2 and a heat conducting member 3. A through hole is provided on the substrate 1. The pole 2 is inserted into the through hole. The pole 2 has a working surface 221 and a welding surface 211 which are opposite to each other along the axial direction of the through hole. A welding blind hole 23 is provided on the working surface 221. The heat conducting member 3 is arranged in the welding blind hole 23.

[0032] According to the battery cover of the embodiment of the utility model, a welding blind hole 23 is set on the working surface 221 of the pole 2, so that the external welding device can complete the welding of the welding surface 211 and the connecting piece 4 inside the battery in the welding blind hole 23, ensuring that the welding slag generated during welding will not enter the battery and increase the risk of battery self-discharge and short circuit. At the same time, after the welding of the pole 2 and the connecting piece 4 is completed, the heat conductor 3 is set in the welding blind hole 23, so that the heat conductor 3 and the surface of the welding blind hole 23 are in heat exchange contact. At this time, when the bus is connected to the pole 2, it will also be connected to the heat conductor 3 and heat exchange contact will occur, and then the heat in the pole 2 can be quickly transferred to the bus by the heat conductor 3, thereby effectively improving the heat dissipation efficiency of the pole 2, the risk of excessive temperature rise of the battery is lower, and the battery charging and discharging safety is higher.

[0033] It should be noted that Figure 1 , Figure 2 and Figure 7 As shown, there are two through holes on the substrate 1, and there are two poles 2, which are respectively a positive pole 2 and a negative pole 2. The positive pole 2 and the negative pole 2 are both provided with a welding blind hole 23, and the two welding blind holes 23 are both provided with a heat conductor 3. In addition, the positive pole 2 is made of aluminum alloy, and the negative pole 2 is made of composite metal material. Figure 4 As shown, the negative electrode column 2 includes an aluminum alloy portion 24 made of an aluminum alloy and a copper portion 25 made of copper. Figure 7 As shown, the battery cover also includes an explosion-proof valve 120 mounted on the substrate 1. Figure 6 As shown, the trajectory of the weld 130 is a circle. Alternatively, the trajectory of the weld 130 can also be adjusted to different trajectories such as a square, a regular polygon, a triangle, a spiral, etc. according to design requirements.

[0034] In some embodiments, the heat conducting member 3 includes a heat conducting adhesive bonded to the inner wall surface of the welding blind hole 23 .

[0035] Therefore, when the weld 130 formed on the bottom surface of the welding blind hole 23 is irregular, the thermal conductive adhesive can also be filled in the entire welding blind hole 23, and ensure that the outer surface of the cured thermal conductive adhesive is coplanar with the working surface 221 of the pole 2, thereby facilitating the reliable connection between the thermal conductive adhesive and the bus bar. In addition, the connection between the thermal conductive adhesive and the welding blind hole 23 is tighter, and the heat transfer efficiency of the thermal conductive adhesive is higher, thereby making the heat dissipation effect of the pole 2 better.

[0036] Specifically, in this embodiment, the thermal conductivity of the thermal conductive adhesive is set to 3W / mk-7W / mk. The inner wall surface of the welding blind hole 23 includes a bottom surface and a peripheral surface.

[0037] In some embodiments, the distance between the bottom surface of the welding blind hole 23 and the welding surface 211 is d1, wherein 0.5 mm≤d1≤1.5 mm.

[0038] The portion of the pole 2 located between the bottom surface of the welding blind hole 23 and the welding surface 211 is used for welding with the connecting piece 4, and the distance between the bottom surface of the welding blind hole 23 and the welding surface 211 is set between 0.5 mm and 1.5 mm to ensure that the welding device in the welding blind hole 23 can effectively melt the portion, so as to achieve a stable and reliable connection between the portion and the connecting piece 4.

[0039] Specifically, the distance d1 between the bottom surface of the welding blind hole 23 and the welding surface 211 may be 0.5 mm, 1 mm, or 1.5 mm.

[0040] In some embodiments, Figure 3 As shown, the pole 2 includes a first column 21 provided with a welding surface 211 and a second column 22 provided with a working surface 221, the first column 21 is loosely fitted in the through hole, the outer peripheral surface of the first column 21 is provided with a limiting groove, and the second column 22 includes a first flange 222 protruding from the outer peripheral surface of the first column 21, and the first flange 222 is located on the first side opposite to the substrate 1 along the first direction, and the first direction is consistent with the thickness direction of the substrate 1. The battery cover also includes a snap ring 7, which is sleeved on the first column 21 and includes a first limiting portion 71 and a second limiting portion 72, the first limiting portion 71 is located on the second side opposite to the substrate 1 along the first direction, and the second limiting portion 72 is fitted in the limiting groove.

[0041] The snap ring 7 is sleeved on the first column 21 and fits in the limiting groove of the first column 21 through the second limiting portion 72, so as to achieve relative fixation of the snap ring 7 and the pole 2 in the first direction. At this time, the convex edge 222 of the second column 22 and the first limiting portion 71 of the snap ring 7 are respectively arranged on the first side and the second side opposite to each other in the first direction of the substrate 1, so as to prevent the pole 2 and the snap ring 7 from being separated from the through hole as a whole, thereby ensuring the installation reliability of the pole 2 and the snap ring 7 on the substrate 1.

[0042] Specifically, Figure 3 As shown, the first side surface of the substrate 1 is also provided with a first recessed groove, the convex edge 222 is loosely fitted in the first recessed groove, the clamping ring 7 also includes a ferrule, the first limiting portion 71 is a first limiting flange arranged on the outer circumference of the ferrule, the second limiting portion 72 is a second limiting flange arranged on the inner circumference of the ferrule, the limiting groove on the first column 21 is an annular groove, and when the ferrule is sleeved on the first column 21, the second limiting flange is clamped in the annular groove. Among them, the cooperation of the ferrule and the first column 21 realizes the relative fixation of the clamping ring 7 and the pole 2 in the radial direction, thereby ensuring the reliable cooperation of the second limiting flange and the annular groove, and further ensuring the relative fixation of the clamping ring 7 and the pole 2 in the axial direction of the pole 2.

[0043] In some embodiments, Figure 3 and Figure 7As shown, the battery cover further includes a first plastic part 8 and a second plastic part 9 . The first plastic part 8 is connected between the flange 222 and the base plate 1 , and the second plastic part 9 is connected between the clamp ring 7 and the base plate 1 .

[0044] The first plastic part 8 separates the flange 222 from the base plate 1, and the second plastic part 9 separates the clamp ring 7 from the base plate 1, thereby ensuring that the pole 2 is insulated from the base plate 1. At the same time, the first plastic part 8 and the second plastic part 9 also ensure that the clamp ring 7 and the pole 2 are reliably installed on the base plate 1.

[0045] Specifically, Figure 7 As shown, the first plastic part 8 is fitted in the first recessed groove, the upper surface of the first plastic part 8 is provided with a second recessed groove, and the flange 222 of the second column 22 is fitted in the second recessed groove. A portion of the second plastic part 9 is sandwiched between the first limiting flange and the base plate 1 in the first direction, and the remaining portion is sandwiched between the outer peripheral surface of the ferrule and the surface of the through hole in the radial direction of the through hole.

[0046] In some embodiments, Figure 4 and Figure 7 As shown, the battery cover also includes a sealing ring 10, which is sleeved on the first column 21 and sandwiched between the convex edge 222 and the substrate 1. This ensures the sealing of the connection between the convex edge 222 and the substrate 1, effectively preventing leakage of electrolyte in the battery, and making the battery safer.

[0047] Specifically, the sealing ring 10 is a rubber gasket whose cross-sectional outer contour is a rectangle. The sealing ring 10 is clamped between the lower surface of the convex edge 222 and the bottom surface of the first groove on the substrate 1 in a first direction, and is located between the first plastic part 8 and the first column 21 in the radial direction of the through hole.

[0048] The battery according to the embodiment of the utility model comprises a winding core 5, a connecting piece 4 and a battery cover as in any of the above embodiments. A pole ear 6 is provided on the side of the winding core 5 facing the pole 2. The pole ear 6 is welded to the connecting piece 4, and the connecting piece 4 is welded to the welding surface 211.

[0049] The technical advantages of the battery according to the embodiment of the utility model are the same as the technical advantages of the battery cover of the above embodiment, which will not be repeated here.

[0050] It should be noted that when there are two poles 2, namely a positive pole 2 and a negative pole 2, the material of the connecting piece 4 welded to the positive pole 2 is aluminum, and the material of the connecting piece 4 welded to the negative pole 2 is copper.

[0051] In some embodiments, Figure 2-Figure 4 As shown, the connecting piece 4 includes a first welding portion 41 , a bending portion 42 and a second welding portion 43 which are connected in sequence. The first welding portion 41 is welded to the welding surface 211 , and the second welding portion 43 is welded to the tab 6 .

[0052] The design of the bending portion 42 provides deformation compensation for both the first welding portion 41 and the second welding portion 43. When the second welding portion 43 is slightly deformed due to welding with the pole lug 6, the deformation, bending or stretching of the bending portion 42 can ensure that the first welding portion 41 is stably in a welding position in contact with the welding surface 211 of the pole 2, thereby ensuring reliable welding between the first welding portion 41 and the welding surface 211 of the pole 2.

[0053] Specifically, Figure 2-Figure 4 As shown, the first welding portion 41 is connected to the bending portion 42 and the second welding portion 43 in sequence on both sides, each connecting sheet 4 corresponds to two pole tabs 6 on the winding core 5, and the two second welding portions 43 in each connecting sheet 4 are welded to the two pole tabs 6 respectively.

[0054] In some embodiments, the pole tab 6 is bent along a second direction relative to the winding core 5, and the second direction is perpendicular to the axial direction of the through hole. A receiving groove 61 is defined between the pole tab 6 and the winding core 5, and the receiving groove 61 has an opening facing the second direction. Part of the first welding portion 41 is fitted in the receiving groove 61 by the opening.

[0055] That is, part of the first welding portion 41 is located in the accommodating groove 61, and the other part is located outside the accommodating groove 61. Under the obstruction of the first welding portion 41, the free end of the pole ear 6 cannot continue to bend toward the winding core 5, thereby effectively preventing the free end of the pole ear 6 from being inserted into the winding core 5 and affecting the function of the winding core 5.

[0056] Specifically, Figure 3-Figure 5 As shown, two pole ears 6 corresponding to one connecting piece 4 are bent in a direction approaching each other, and the openings of the two receiving grooves 61 formed thereby are arranged opposite to each other.

[0057] A vehicle according to an embodiment of the present invention includes a battery as described in the above embodiment.

[0058] The technical advantages of the vehicle according to the embodiment of the utility model are the same as the technical advantages of the battery cover and the battery in the above-mentioned embodiment, which will not be repeated here.

[0059] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0060] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0061] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0063] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0064] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A battery cover, characterized in that: include: A substrate, wherein the substrate is provided with a through hole; A pole, the pole is inserted into the through hole, the pole has a working surface and a welding surface that are opposite to each other along the axial direction of the through hole, and a welding blind hole is provided on the working surface; and A heat conducting member is arranged in the welding blind hole.

2. The battery cover according to claim 1, characterized in that: The heat conducting member comprises a heat conducting adhesive bonded to the inner wall surface of the welding blind hole.

3. The battery cover according to claim 1, characterized in that: The distance between the bottom surface of the welding blind hole and the welding surface is d1, wherein 0.5 mm≤d1≤1.5 mm.

4. The battery cover according to claim 1, characterized in that: The pole comprises a first column provided with the welding surface and a second column provided with the working surface, the first column is loosely fitted in the through hole, a limiting groove is provided on the outer peripheral surface of the first column, and the second column comprises a first convex edge protruding from the outer peripheral surface of the first column, the first convex edge is located on a first side of the substrate opposite to the first direction, and the first direction is consistent with the thickness direction of the substrate; The battery cover also includes a snap ring, which is sleeved on the first column and includes a first limiting portion and a second limiting portion, the first limiting portion is located on a second side of the substrate opposite to the first direction, and the second limiting portion is engaged in the limiting groove.

5. The battery cover according to claim 4, characterized in that: The battery cover also includes a first plastic part and a second plastic part, wherein the first plastic part is connected between the flange and the base plate, and the second plastic part is connected between the clamping ring and the base plate.

6. The battery cover according to claim 4, characterized in that: The battery cover plate further comprises a sealing ring, which is sleeved on the first column and sandwiched between the convex edge and the base plate.

7. A battery, characterized in that: It comprises a winding core, a connecting piece and a battery cover plate as claimed in any one of claims 1 to 6, wherein a pole ear is provided on a side of the winding core facing the pole, the pole ear is welded to the connecting piece, and the connecting piece is welded to the welding surface.

8. The battery according to claim 7, characterized in that The connecting piece includes a first welding portion, a bending portion, and a second welding portion which are connected in sequence. The first welding portion is welded to the welding surface, and the second welding portion is welded to the tab.

9. The battery according to claim 8, characterized in that The pole ear is bent along a second direction relative to the winding core, and the second direction is perpendicular to the axial direction of the through hole. A receiving groove is defined between the pole ear and the winding core, and the receiving groove has an opening facing the second direction. Part of the first welding part is fitted in the receiving groove through the opening.

10. A vehicle, characterized in that: A battery as claimed in any one of claims 7 to 9.

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