Bottom plate, battery pack and electric device

Abstract

The utility model provides a base plate, battery pack and electricity utilization device, the base plate is used for being connected with the upper box body of battery pack, battery pack can be replaced through the battery changing equipment, the battery changing equipment and the battery pack generate relative displacement along the first direction, and one side of the base plate back to the upper box body is provided with a convex rib and a plane part. The convex ribs comprise first convex ribs used for making contact with the battery replacing equipment, the first convex ribs comprise included angles alpha in the Z direction, and the radius R1 of the included angles alpha meets the condition that R1 is larger than or equal to 10 mm. The R1 is set in the numerical range, on one hand, stress concentration caused by sharp corner contact of the battery replacement equipment and the first convex rib 211 in the Z direction can be avoided, on the other hand, attachment of the abrasion-resistant coating is facilitated by arranging the large round corner, namely, the risk of abrasion of the bottom plate can be reduced by arranging the R1 larger than or equal to 10 mm.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrochemical device technical field, specifically provide a bottom plate, battery pack and electric device. BACKGROUND

[0002] Due to the sustainable development and environmental friendly characteristics of new energy vehicles, they have presented the trend of rapid development in recent years, however, compared with oil vehicles, the insufficient endurance of new energy vehicles is one of the most important reasons restricting their development.

[0003] With the rapid development of new energy, the energy supplement system has become a problem that cannot be avoided. At present, there are two ways of pure electric energy supplement in China, one is to build charging piles, and the other is to layout battery swap stations. On the one hand, the energy supplement efficiency of battery swap is much higher than that of charging pile, on the other hand, due to the unified management of battery swap station, all users do not need to worry about battery attenuation and safety problem, and battery inspection can be carried out every time the battery is replaced to ensure the safety of the driving vehicle.

[0004] However, the bottom plate of the battery pack circulating in the battery swap station has the problem of exposed metal plate, which has the risk of corrosion. UTILITY MODEL CONTENTS

[0005] In order to solve the problem of exposed metal plate on the bottom plate of the battery pack, the utility model provides a bottom plate for connecting with the upper box body of the battery pack, the battery pack can be replaced by the battery replacement equipment, the battery replacement equipment is relatively displaced along the first direction and the battery pack, one side of the bottom plate away from the upper box body is provided with a convex rib and a flat part, the convex rib includes a first convex rib for contacting with the battery replacement equipment, the first convex rib includes an included angle alpha in Z direction, the radius R1 of the included angle alpha satisfies: R1 >= 10mm.

[0006] R1 is set in the above numerical range, on the one hand, it can avoid the stress concentration caused by the sharp angle contact of the battery replacement equipment and the first convex rib 211 in Z direction, on the other hand, by setting large round angle, it is more beneficial to the adhesion of wear-resistant coating, that is, setting R1 >= 10mm, which can reduce the risk of bottom plate wear.

[0007] In the optional technical scheme of the utility model, the first convex rib further includes an included angle beta in XY plane, the radius R2 of the included angle beta satisfies: R2 >= 15mm. R2 is set in the above numerical range, on the one hand, it can avoid the stress concentration caused by the sharp angle contact of the battery replacement equipment and the first convex rib 211 in XY plane, on the other hand, by setting large round angle, it is more beneficial to the adhesion of wear-resistant coating, that is, setting R2 >= 15mm, which can reduce the risk of bottom plate wear.

[0008] In the optional technical scheme of the utility model, the depth H1 of the above-mentioned convex rib satisfies: 10mm >= H1 > 0mm. If the depth H1 of the convex rib 210 is too large, the slope is too long, which will make the area of the planar part of the convex rib, that is, the area of contact with the roller, too small, and it is easy to wear. Therefore, setting H1 in the above-mentioned numerical range can ensure the rigidity of the bottom plate while reducing the risk of wear.

[0009] In the optional technical scheme of the utility model, the above-mentioned first convex rib extends along the first direction, and the Z-direction height of the above-mentioned first convex rib along the first direction is constant or gradually changes.

[0010] In the optional technical scheme of the utility model, the above-mentioned first convex rib includes a continuous support part continuously extending along the first direction, and the size of the above-mentioned continuous support part along the first direction is equal to the size of the above-mentioned bottom plate.

[0011] In the optional technical scheme of the utility model, the above-mentioned first convex rib includes a first column of intermittent support parts and a second column of intermittent support parts discontinuously extending along the first direction, the planar part arranged in the above-mentioned first column of intermittent support parts is a first planar part, the planar part arranged in the above-mentioned second column of intermittent support parts is a second planar part, along the second direction, the above-mentioned first planar part and the above-mentioned second column of intermittent support parts overlap, the above-mentioned second planar part and the above-mentioned first column of intermittent support parts overlap, and the Z-direction height of the above-mentioned first column of intermittent support parts is the same as the Z-direction height of the above-mentioned second column of intermittent support parts.

[0012] In the optional technical scheme of the utility model, the length L1 of the above-mentioned first convex rib along the second direction satisfies: L1 >= 280mm. Along the second direction, the length of the above-mentioned first convex rib is greater than or equal to 50% of the length of the above-mentioned battery replacement device.

[0013] In the optional technical scheme of the utility model, one side of the bottom plate away from the upper box is provided with a coating, and the material of the coating is selected from at least one of polyamide powder coating, polyester powder coating, epoxy powder coating, solvent type coating of epoxy, solvent type coating of polyurea, solvent type coating of acrylic acid, solvent-free type coating of epoxy, solvent-free type coating of polyurea, solvent-free type coating of acrylic acid and PVC solvent type coating.

[0014] The utility model also provides a battery pack for being replaced by the battery replacement device, the battery replacement device and the battery pack are relatively displaced along the first direction, the battery pack includes an upper box, a battery monomer and a bottom plate, the bottom plate is connected with the upper box, the battery monomer is arranged in the accommodating cavity surrounded by the bottom plate and the upper box, and the bottom plate is the above-mentioned bottom plate. The back of the convex rib is provided with a concave cavity, the convex rib includes a first convex rib for contacting the battery replacement device, the back of the first convex rib is provided with a first concave cavity, and a filling piece is arranged in the first concave cavity.

[0015] In the optional technical scheme of the utility model, the convex rib further comprises a second convex rib which does not contact the battery replacing device, a second concave cavity is arranged on the back of the second convex rib, and a filling piece is arranged in the second concave cavity. The filling piece is foam. The filling piece and the wall of the concave cavity are bonded.

[0016] In the optional technical scheme of the utility model, the battery pack further comprises a support piece, the support piece is arranged between the battery monomer and the bottom plate, and the support piece and the flat part are bonded.

[0017] The utility model further provides a kind of electric device, comprising above-mentioned battery pack. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the schematic diagram of battery pack of the utility model;

[0019] Figure 2 It is the sectional schematic diagram of bottom plate of the utility model;

[0020] Figures 3-4 It is Figure 2 Local enlarged view of;

[0021] Figure 5 It is the schematic diagram of another embodiment of the utility model bottom plate;

[0022] Figures 6-9 It is the sectional schematic diagram of another embodiment of the utility model bottom plate.

[0023] REFERENCE NUMERALS

[0024] Bottom plate 200;

[0025] Convex rib 210;

[0026] First convex rib 211;

[0027] Continuous support part 2111, intermittent support part 2112, first column intermittent support part 2113, second column intermittent support part 2114;

[0028] Second convex rib 212;

[0029] Flat part 220;

[0030] First flat part 221, second flat part 222;

[0031] Filling piece 300;

[0032] Support piece 400;

[0033] Double-sided adhesive tape 500;

[0034] Structural adhesive 600. DETAILED DESCRIPTION

[0035] Optional embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application.

[0036] In the description of the present application, it should be understood that the terms "distance", "width", "thickness", "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0037] In the description of the present application, the terms "first", "second", "third", "fourth" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0038] In addition, it should be noted that, in the description of the present application, unless otherwise specifically specified and limited, the terms "set", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In recent years, the new energy automobile market has shown a rapid growth trend. With the rapid development of new energy, the energy supplement system has become a problem that cannot be avoided. At present, there are two ways to supplement energy for domestic pure electric vehicles, one is to build charging piles, which is more common, and the other is to layout battery swap stations. On the one hand, battery swap undoubtedly has more advantages in energy supplement efficiency, on the other hand, due to the unified management of battery swap stations, all users no longer need to worry about battery degradation and safety problems, and can get a battery check every time they swap batteries.

[0040] Under the charging energy supplement, the battery pack bottom guard plate only achieves the corresponding mechanical properties through the convex rib design, and achieves the corrosion resistance effect through the sprayed coating. However, under the battery replacement energy supplement, the battery pack is transported through the chain or the roller during the transportation process, and the battery pack bottom guard plate inevitably needs to contact the chain or the roller to produce friction. The chain and the roller are generally distributed in the connection position, the buffer position, the lifting position and the battery position. When the battery pack is transferred from one position to another position, the chain, the roller and the battery pack bottom guard plate slide and rub, and due to the convex rib design at the bottom of the battery pack bottom guard plate, the partial area is pressed too large, and with the increase of the transfer times, the coating of the partial area of the bottom guard plate is thinned or even exposed to the metal bottom plate, the bottom of the battery pack bottom guard plate is exposed, and the risk of the metal bottom plate being exposed and corroded is increased. Since the maintenance cost of the battery pack is relatively high, and the repair and maintenance is not conducive to improving the user experience, it is urgent to improve the wear resistance of the battery pack bottom guard plate.

[0041] In order to solve the problem of the exposed metal plate on the bottom plate of the battery pack, as shown in Figures 1 to 4 The utility model provides a kind of bottom plate and battery pack, and battery pack can be replaced by battery replacement equipment, and battery replacement equipment is relatively displaced along first direction and battery pack. Battery pack includes upper box, battery monomer and bottom plate 200, bottom plate 200 is connected with upper box, and battery monomer is arranged in the accommodating cavity surrounded by bottom plate 200 and upper box. Bottom plate 200 is provided with convex rib 210 and plane part 220 on the side facing away from upper box, and convex rib 210 includes first convex rib 211 for contacting with battery replacement equipment, and first convex rib 211 includes the included angle α in Z direction, and the radius R1 of included angle α satisfies: R1≥10mm. R1 is set in the above numerical range, on the one hand, it can avoid the stress concentration caused by the sharp angle contact of battery replacement equipment and first convex rib 211 in Z direction, and on the other hand, by setting large fillet, it is more conducive to the adhesion of wear-resistant coating, i.e. R1≥10mm, which can reduce the risk of bottom plate wear. Figure 3 For Figure 2 The local enlarged view of D part, Figure 4 For Figure 2 The local enlarged view of C part, and the depth of convex rib of D part is different from the depth of convex rib of C part.

[0042] In the optional embodiment of the utility model, as shown in Figure 1 First convex rib 211 further includes the included angle β in XY plane, and the radius R2 of included angle β satisfies: R2≥15mm. R2 is set in the above numerical range, on the one hand, it can avoid the stress concentration caused by the sharp angle contact of battery replacement equipment and first convex rib 211 in XY plane, and on the other hand, by setting large fillet, it is more conducive to the adhesion of wear-resistant coating, i.e. R2≥15mm, which can reduce the risk of bottom plate wear.

[0043] In the optional embodiment of the utility model, the depth H1 of the convex rib 210 satisfies: 10mm >= H1 > 0mm. If the depth H1 of the convex rib 210 is too large, the slope is too long, which will make the plane part of the convex rib, that is, the area in contact with the roller, too small, and easy to wear. Therefore, setting H1 in the above numerical range can ensure the rigidity of the bottom plate while reducing the wear risk.

[0044] In the optional embodiment of the utility model, as shown in Figure 1 and Figure 5 , the first convex rib 211 extends along the first direction, and the Z-direction height of the first convex rib 211 along the first direction is constant or gradually changes. The first convex rib 211 for contacting the battery replacement equipment extends along the first direction with constant or gradually changing Z-direction height, so that during the relative movement of the battery replacement equipment and the bottom plate 200, the Z-direction position of the stress point of the battery replacement equipment and the bottom plate 200 does not change suddenly, and the stress concentration problem caused by the sudden change of the Z-direction position of the stress point between the battery replacement equipment and the bottom plate 200 can be avoided, thereby reducing the wear risk of the bottom plate 200.

[0045] Specifically, as shown in Figure 1 , the first convex rib 211 can include a continuous support part 2111 continuously extending along the first direction and an intermittent support part 2112 extending along the first direction, and the size of the continuous support part 2111 along the first direction is equal to the size of the bottom of the bottom plate 200. The convex rib on the bottom plate 200 is generally formed by stamping, and it is easier to realize that the Z-direction height of the first convex rib 211 does not change suddenly by setting the continuous support part 2111 with a size equal to the size of the bottom of the bottom plate, especially for preparing continuous support parts with the same Z-direction height. In addition to the continuous support part 2111 which can be used to support the battery replacement equipment, the first convex rib 211 also includes an intermittent support part 2112, which can also support the battery replacement equipment and can further reduce the wear risk.

[0046] Optionally, as shown in Figure 5As shown, the first protruding ribs 211 can also include a first column of intermittent support portions 2113 and a second column of intermittent support portions 2114 extending intermittently along the first direction, the planar portions arranged in the first column of intermittent support portions 2113 are first planar portions 221, the planar portions arranged in the second column of intermittent support portions 2114 are second planar portions 222, along the second direction, the first planar portions 221 and the second column of intermittent support portions 2114 overlap, the second planar portions 222 and the first column of intermittent support portions 2113 overlap, the Z-direction height of the first column of intermittent support portions 2113 and the Z-direction height of the second column of intermittent support portions 2114 are the same. When the battery replacement device moves to the end of a protruding rib of the first column of intermittent support portions 2113, it can safely transition to being supported by the protruding rib of the second column of intermittent support portions 2114. Similarly, the Z-direction position of the stress points of the battery replacement device and the bottom plate 200 will not change abruptly, and the stress concentration problem caused by the abrupt change in the Z-direction position of the stress points between the battery replacement device and the bottom plate 200 can be avoided, thereby reducing the risk of bottom plate wear.

[0047] Optionally, the length L1 of the first protruding rib 211 along the second direction satisfies: L1≥280mm. By setting L1 in the above numerical range, the contact area between the bottom plate and the battery replacement device during movement can be increased, further reducing the risk of bottom plate wear. Along the second direction, the length of the first protruding rib 211 is greater than or equal to 50% of the length of the battery replacement device, ensuring that the bottom plate 200 and the battery replacement device have sufficient contact area during relative movement, further reducing the risk of wear of the bottom plate 200.

[0048] Optionally, the side of the bottom plate 200 facing away from the upper box is provided with a coating, and the material of the coating is selected from at least one of polyamide powder coating, polyester powder coating, epoxy powder coating, solvent type coating of epoxy, solvent type coating of polyurea, solvent type coating of acrylic acid, solvent-free type coating of epoxy, solvent-free type coating of polyurea, solvent-free type coating of acrylic acid, and PVC solvent type coating.

[0049] In an optional embodiment of the present application, as shown in Figure 1 and Figures 6-9 As shown, the back of the protruding rib 210 is provided with a cavity, the protruding rib 210 includes a first protruding rib 211 for contacting the battery replacement device, the back of the first protruding rib 211 is provided with a first cavity, and a filler 300 is arranged in the first cavity. If the filler 300 is not arranged in the first cavity, the battery replacement device will deform the first protruding rib 211 during replacement, and during the deformation of the first protruding rib 211, the stress in some areas of the first protruding rib 211 will increase, causing wear. The present application arranges a filler 300 in the first cavity, which can support the first protruding rib 211 to prevent it from deforming, thereby reducing the risk of wear caused by stress concentration.

[0050] In the optional embodiment of the utility model, as shown in Figure 1 The convex rib 210 further includes a second convex rib 212 not used for contacting the battery replacing device, and the back of the second convex rib 212 is provided with a second concave cavity, and the second concave cavity is provided with a filling piece 300. Deformation of the rest of the bottom plate during installation of the battery pack can be avoided. Optionally, the filling piece 300 can be foam.

[0051] In the optional embodiment of the utility model, as shown in Figures 6-9 The battery pack further includes a support piece 400 arranged between the battery monomer and the bottom plate 200. The support piece 400 can be a water-cooled plate for example, and the water-cooled plate is fixed on the upper box body or the bottom plate, and the battery monomer can be bonded to the water-cooled plate. As shown in Figure 2 and Figure 3 The filling piece 300 can be bonded to the support piece 400, and the planar part 220 and the support piece 400 can also be bonded. For example, double-sided adhesive tape can be arranged between the filling piece 300 and the support piece, and structural adhesive can be arranged between the planar part 220 and the support piece 400. As shown in Figure 4 The filling piece 300 can be bonded to the inner wall of the concave cavity, for example, at least one of the bottom wall and the side wall of the concave cavity. As shown in Figure 5 Structural adhesive and double-sided adhesive tape can also be arranged between the planar part 220 and the support piece 400. Both the structural adhesive and the double-sided adhesive tape belong to adhesives, and can make the internal structure of the battery pack more stable according to actual needs.

[0052] The utility model further provides a kind of electric device. The electric device of the utility model includes the battery pack of optional embodiment. The electric device can be but not limited to mobile phone, tablet computer, notebook computer, electric toy, electric tool, electric car, electric car, ship, spacecraft and so on. Among them, electric toy can include fixed or mobile electric toy, for example, game machine, electric car toy, electric ship toy and electric aircraft toy and so on, spacecraft can include aircraft, rocket, space shuttle and spacecraft and so on.

[0053] So far, the technical scheme of the utility model has been described in combination with the optional implementation mode shown in the drawings, but it is easy for those skilled in the art to understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to related technical features without departing from the principles of the utility model, and the technical scheme after these changes or replacements will fall within the protection scope of the utility model.

Claims

1. A bottom plate for connection with an upper case of a battery pack, the battery pack being replaced by a battery replacing device, the battery replacing device being relatively displaced along a first direction and the battery pack, characterized in that, A side of the bottom plate facing away from the upper box is provided with a convex rib and a flat part, the convex rib includes a first convex rib for contacting the battery swapping device, the first convex rib includes an included angle a in the Z direction, a radius R1 of the included angle a satisfies: R1≥10mm.

2. The base plate of claim 1, wherein The first convex rib further includes an included angle β in the XY plane, a radius R2 of the included angle β satisfies: R2≥15mm.

3. The base plate of claim 1, wherein A depth H1 of the convex rib satisfies: 10mm≥H1>0mm.

4. The base plate of claim 1, wherein, The first convex rib extends along a first direction, and a Z-direction height of the first convex rib is constant or gradually changes along the first direction.

5. The base plate of claim 4, wherein, The first convex rib includes a continuous support part continuously extending along the first direction, and a size of the continuous support part along the first direction is equal to a size of the bottom plate.

6. The base plate of claim 4, wherein, The first convex rib includes a first column of intermittent support parts and a second column of intermittent support parts intermittently extending along the first direction, a flat part provided in the first column of intermittent support parts is a first flat part, a flat part provided in the second column of intermittent support parts is a second flat part, along a second direction, the first flat part and the second column of intermittent support parts overlap, the second flat part and the first column of intermittent support parts overlap, and a Z-direction height of the first column of intermittent support parts is the same as a Z-direction height of the second column of intermittent support parts.

7. The base plate of claim 1, wherein A length L1 of the first convex rib along the second direction satisfies: L1≥280mm.

8. The base plate of claim 7, wherein, Along the second direction, a length of the first convex rib is greater than or equal to 50% of a length of the battery swapping device.

9. The baseplate of claim 1, wherein, A side of the bottom plate facing away from the upper box is provided with a coating, and a material of the coating is selected from any one of a polyamide powder coating, a polyester powder coating, an epoxy powder coating, a solvent-based epoxy coating, a solvent-based polyurea coating, a solvent-based acrylic coating, a solvent-free epoxy coating, a solvent-free polyurea coating, a solvent-free acrylic coating, and a solvent-based PVC coating. 10.A battery pack for replacement by a battery replacement device, the battery replacement device being relatively displaced along a first direction and the battery pack, the battery pack comprising an upper case, a battery cell and a bottom plate, the bottom plate being connected with the upper case, the battery cell being disposed in a receiving cavity defined by the bottom plate and the upper case, characterized in that, The bottom plate is the bottom plate according to any one of claims 1 to 9.

11. The battery pack of claim 10, wherein, A back surface of the convex rib is provided with a cavity, the convex rib includes a first convex rib for contacting the battery swapping device, a back surface of the first convex rib is provided with a first cavity, and a filler is provided in the first cavity.

12. The battery pack of claim 11, wherein, The convex rib further includes a second convex rib not for contacting the battery swapping device, a back surface of the second convex rib is provided with a second cavity, and a filler is provided in the second cavity.

13. The battery pack of claim 11, wherein, The filler and a wall of the cavity are bonded.

14. The battery pack of claim 11, wherein, The filler is a foam.

15. The battery pack of claim 11, wherein, The battery pack further includes a support provided between the battery monomer and the bottom plate, the support and the flat part are bonded.

16. An electrical device, comprising: The battery pack includes the battery pack according to any one of claims 10 to 15.

Images