Battery pack and electric device

Abstract

The utility model provides a battery pack and electric device, the battery pack is used for replacing through the battery changing equipment, the battery changing equipment generates relative displacement with the battery pack along the first direction, the battery pack comprises an upper box body, a battery monomer and a bottom plate, the bottom plate is connected with the upper box body, the battery monomer is arranged in an accommodating cavity enclosed by the bottom plate and the upper box body, and the battery monomer is arranged in the accommodating cavity. A convex rib and a plane part are arranged on one surface, back to the upper box body, of the bottom plate, a concave cavity is formed in the back surface of the convex rib, the convex rib comprises a first convex rib in contact with the battery replacement equipment, a first concave cavity is formed in the back surface of the first convex rib, and a filling part is arranged in the first concave cavity. The filling piece is arranged in the first concave cavity, and the filling piece can support the first convex rib to avoid deformation of the first convex rib, so that the risk of abrasion caused by stress concentration in the contact process with the battery replacement equipment is reduced.

Description

TECHNICAL FIELD

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

[0002] Due to the sustainable development and environmental friendly characteristics of new energy vehicles, they have shown a rapid development trend 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 driving vehicles.

[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. CONTENT OF THE UTILITY MODEL

[0005] In order to solve the problem of exposed metal plate on the bottom plate of the battery pack, the utility model provides a battery pack for replacement by battery swap equipment, the battery swap equipment is relatively displaced along the first direction and the battery pack, the battery pack includes an upper box body, a battery monomer and a bottom plate, the bottom plate is connected with the upper box body, the battery monomer is arranged in the accommodating cavity surrounded by the bottom plate and the upper box body, characterized in that one side of the bottom plate away from the upper box body is provided with a convex rib and a flat part, the back surface of the convex rib is provided with a recess, and the convex rib includes a first convex rib for contacting with the battery swap equipment, the back surface of the first convex rib is provided with a first recess, and the first recess is provided with a filling piece.

[0006] If the filling piece is not arranged in the first recess, when the battery pack is replaced by the battery swap equipment, the battery swap equipment will deform the first convex rib, and in the deformation process of the first convex rib, the stress of part of the first convex rib will increase, thereby causing wear. The filling piece is arranged in the first recess, which can support the first convex rib to avoid deformation, so as to reduce the risk of stress concentration and wear.

[0007] In the optional technical scheme of the utility model, the convex rib further includes a second convex rib which is not used for contacting with the battery swap equipment, the back surface of the second convex rib is provided with a second recess, and the second recess is provided with a filling piece. It can avoid the deformation of the remaining position of the bottom plate during the installation of the battery pack.

[0008] In the optional technical scheme of the utility model, the filling piece and the wall of the cavity are bonded.

[0009] In the optional technical scheme of the utility model, the filling piece is a foam.

[0010] In the optional technical scheme of the utility model, the battery pack further comprises a support, the support is arranged between the battery monomer and the bottom plate, the support and the flat part are bonded, and the internal structure of the battery pack is more stable.

[0011] In the optional technical scheme of the utility model, the depth H1 of the convex rib satisfies 10mm >= H1 > 0mm.

[0012] In the optional technical scheme of the utility model, the first convex rib extends along the first direction, and the Z-direction height of the first convex rib along the first direction is constant or gradually changes. The first convex rib for contacting the battery replacing equipment extends along the first direction and has a constant or gradually changing Z-direction height, so that the Z-direction position of the stress point of the battery replacing equipment and the bottom plate does not change suddenly during relative movement of the battery replacing equipment and the bottom plate. Stress concentration problems caused by sudden change of the Z-direction position of the stress point between the battery replacing equipment and the bottom plate can be avoided, and the wear risk of the bottom plate is reduced.

[0013] In the optional technical scheme of the utility model, the first convex rib comprises a continuous support part continuously extending along the first direction, and the size of the continuous support part along the first direction is equal to the size of the bottom plate. Optionally, the first convex rib further comprises an intermittent support part extending along the first direction. The convex rib on the bottom plate is generally formed by stamping, and it is easier to realize that the Z-direction height of the first convex rib does not change suddenly by arranging the continuous support part with the same size as the bottom plate, especially the continuous support part with the same Z-direction height. In addition to the continuous support part for supporting the battery replacing equipment, the first convex rib further comprises an intermittent support part, and the intermittent support part can also support the battery replacing equipment, so that the wear risk is further reduced.

[0014] In the optional technical scheme of the utility model, the first convex rib includes first column intermittent support part and second column intermittent support part which extend discontinuously along the first direction, the planar part arranged in the first column intermittent support part is the first planar part, the planar part arranged in the second column intermittent support part is the second planar part, along the second direction, the first planar part and the second column intermittent support part overlap, the second planar part and the first column intermittent support part overlap, the Z direction height of the first column intermittent support part is same with the Z direction height of the second column intermittent support part. When the battery replacing equipment moves to the end of a convex rib of the first column intermittent support part, it can be safely transferred to be supported by the convex rib of the second column intermittent support part. The Z direction position of the stress point of the battery replacing equipment and the bottom plate can not be suddenly changed, and the stress concentration problem caused by the sudden change of the Z direction position of the stress point between the battery replacing equipment and the bottom plate can be avoided, so as to reduce the wear risk of the bottom plate.

[0015] In the optional technical scheme of the utility model, the length L1 of the first convex rib along the second direction satisfies: L1≥280mm. By setting L1 in the above numerical range, the contact area of the bottom plate and the battery replacing equipment during movement can be increased, and the wear risk of the bottom plate can be further reduced.

[0016] In the optional technical scheme of the utility model, along the second direction, the length of the first convex rib is greater than or equal to 50% of the length of the battery replacing equipment, so that the bottom plate and the battery replacing equipment have enough contact area during relative movement, and the wear risk of the bottom plate is further reduced.

[0017] 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.

[0018] The utility model also provides a kind of electric device, including above-mentioned battery pack. ACCURACY OF DRAWINGS

[0019] Figure 1 It is the schematic diagram of the battery pack of the utility model;

[0020] Figures 2-5 It is the sectional schematic diagram of each embodiment of the bottom plate of the utility model;

[0021] Figure 6 It is the sectional schematic diagram of another embodiment of the bottom plate of the utility model;

[0022] Figures 7-8 It is Figure 6 partial enlarged view of

[0023] Figure 9 is a schematic view of another embodiment of the bottom plate of the utility model.

[0024] Reference signs

[0025] The bottom plate 200;

[0026] The convex rib 210;

[0027] The first convex rib 211;

[0028] The continuous support part 2111, the intermittent support part 2112, the first column intermittent support part 2113, the second column intermittent support part 2114;

[0029] The second convex rib 212;

[0030] The planar part 220;

[0031] The first planar part 221, the second planar part 222;

[0032] The filler 300;

[0033] The support 400;

[0034] The double-sided adhesive tape 500;

[0035] The structural adhesive 600. DETAILED DESCRIPTION

[0036] The optional embodiments of the utility model are described below with reference to the drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the utility model, and are not intended to limit the protection scope of the utility model.

[0037] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "distance", "width", "thickness", "upper", "lower", "left", "right", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model to a specific orientation, structure and operation, and therefore cannot be understood as limiting the utility model.

[0038] In the description of the utility model, the terms "first", "second", "third", "fourth" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the description of the utility model, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0039] In addition, it also needs to be explained that, in the description of the utility model, unless another explicit provision and limitation, the term "set", "connection" should be broad understanding, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be directly connected, can also be indirectly connected through the intermediate medium, can also be two elements inside the communication. For those skilled in the art, the above-mentioned terms can be understood according to the specific meaning of the utility model.

[0040] In recent years, the new energy vehicle 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, and the other is to layout battery swap stations. On the one hand, battery swap 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 battery check every time.

[0041] 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 swap energy supplement, the battery pack is transported through the chain or roller, and the battery pack bottom guard plate inevitably needs to contact the chain or roller and produce friction during transportation. The chain and the roller are generally distributed in the connection position, the buffer position, the lifting position and the battery storage position. When the battery pack is transferred from one position to another, the chain, the roller and the battery pack bottom guard plate slide and rub. Due to the convex rib design at the bottom of the battery pack bottom guard plate, the pressure in some areas is too large, and with the increase of the transfer times, the coating of the bottom guard plate in some areas is thinned or even exposed to the metal bottom plate, which increases the risk of exposure of the metal bottom plate of the battery pack bottom guard plate, thereby increasing the risk of corrosion of the metal bottom plate. 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.

[0042] In order to solve the problem of exposed metal plate on the bottom plate of the battery pack, such as Figures 1-5As shown, the utility model provides a battery pack for replacing through the battery replacing equipment, and the battery replacing equipment is displaced along the first direction and the battery pack, the battery pack includes upper box body, battery monomer and bottom plate 200, the bottom plate 200 is connected with upper box body, the battery monomer is arranged in the accommodating cavity surrounded by bottom plate 200 and upper box body, the bottom plate 200 is provided with convex rib 210 and plane part 220 on the side away from upper box body, the back of convex rib 210 is provided with recessed cavity, and the convex rib 210 includes the first convex rib 211 for contacting with the battery replacing equipment, the back of first convex rib 211 is provided with first recessed cavity, and the filling piece 300 is arranged in the first recessed cavity. If the filling piece 300 is not arranged in the first recessed cavity, when replacing through the battery replacing equipment, the battery replacing equipment will deform the first convex rib 211, and in the process of deforming the first convex rib 211, the stress of the partial area of the first convex rib 211 will increase, thereby causing abrasion. The filling piece 300 is arranged in the first recessed cavity, and the filling piece 300 can support the first convex rib 211, thereby avoiding the deformation of the first convex rib 211, so that the risk of abrasion caused by stress concentration is reduced.

[0043] In the optional embodiment of the utility model, as shown in Figures 1-5 The convex rib 210 further includes the second convex rib 212 not used for contacting with the battery replacing equipment, the back of the second convex rib 212 is provided with the second recessed cavity, and the filling piece 300 is arranged in the second recessed cavity. The deformation of the remaining positions of the bottom plate during the installation of the battery pack can be avoided. Optionally, the filling piece 300 can be foam.

[0044] In the optional embodiment of the utility model, as shown in Figures 2-5 The battery pack further includes the support 400, and the support 400 is arranged between the battery monomer and the bottom plate 200. The support 400 can be a water-cooling plate, for example, and the water-cooling plate is fixed on the upper box body or the bottom plate, and the battery monomer can be bonded to the water-cooling plate. As shown in Figure 2 And Figure 3 The filling piece 300 can be bonded to the support 400, and the plane part 220 and the support 400 can also be bonded. For example, double-sided adhesive tape can be arranged between the filling piece 300 and the support, and structural adhesive can be arranged between the plane part 220 and the support 400. As shown in Figure 4 The filling piece 300 can be bonded to the inner wall of the recessed cavity, for example, at least one of the bottom wall and the side wall of the recessed cavity. As shown in Figure 5 Structural adhesive and double-sided adhesive tape can also be arranged between the plane part 220 and the support 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.

[0045] In the optional embodiment of the utility model, as shown in Figure 2As shown, the depth H1 of the rib 210 satisfies: 10mm ≥ H1 > 0mm. If the depth H1 of the rib 210 is too large and the slope is too long, the flat part of the rib, that is, the area in contact with the roller, will be too small, making it prone to wear. Therefore, setting H1 within the above-mentioned value range can ensure the rigidity of the base plate while reducing its wear risk.

[0046] In optional embodiments of this utility model, such as Figure 1 and Figures 6-8 As shown, the first rib 211 includes an included angle α in the Z direction. Specifically, the first rib 211 includes two included angles α in the Z direction, and the radius R1 of the included angle α satisfies: R1≥10mm. Setting R1 within the above value range can, on the one hand, avoid stress concentration caused by the sharp corner contact between the power swapping equipment and the first rib 211 in the Z direction, and on the other hand, by setting a large radius, it is more conducive to the adhesion of the wear-resistant coating. That is, setting R1≥10mm can reduce the risk of wear on the base plate. Figure 7 for Figure 6 A magnified view of part D in the middle. Figure 8 for Figure 6 A magnified view of part C shows that the depth of the rib at part D differs from that at part C. The first rib 211 also includes an angle β between the XY planes, with a radius R2 satisfying R2 ≥ 15mm. Setting R2 within this range avoids stress concentration caused by sharp corner contact between the power swapping equipment and the first rib 211 in the XY plane. Furthermore, a large radius facilitates the adhesion of the wear-resistant coating; i.e., setting R2 ≥ 15mm reduces the risk of wear on the base plate.

[0047] In optional embodiments of this utility model, such as Figure 1 and Figure 9 As shown, the first rib 211 extends along the first direction, and the height of the first rib 211 in the Z-direction along the first direction remains constant or gradually changes. By setting the first rib 211, which is used to contact the power swapping equipment, to have a constant or gradually changing height in the Z-direction along the first direction, the Z-direction position of the stress points of the power swapping equipment and the base plate 200 will not change abruptly during the relative movement of the power swapping equipment and the base plate 200. This avoids stress concentration problems caused by abrupt changes in the Z-direction position of the stress points between the power swapping equipment and the base plate 200, thereby reducing the risk of wear on the base plate 200.

[0048] Optional, such as Figure 1As shown, the first protruding ribs 211 can include continuous support portions 2111 continuously extending along the first direction and intermittent support portions 2112 extending along the first direction, and the size of the continuous support portions 2111 along the first direction is equal to the size of the bottom of the bottom plate 200. The protruding ribs on the bottom plate 200 are generally formed by stamping, and it is easier to achieve that the Z-direction height of the first protruding ribs 211 does not change abruptly by providing continuous support portions 2111 with a size equal to the size of the bottom of the bottom plate, especially for preparing continuous support portions with the same Z-direction height. In addition to the continuous support portions 2111 which can support the battery swap device, the first protruding ribs 211 also include intermittent support portions 2112 which can also support the battery swap device and can further reduce the risk of wear.

[0049] Optionally, as shown, Figure 9 As 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 which intermittently extend along the first direction, the planar portions provided in the first column of intermittent support portions 2113 are first planar portions 221, the planar portions provided 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, and 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 swap 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 ribs of the second column of intermittent support portions 2114. Similarly, the Z-direction positions of the stress points of the battery swap device and the bottom plate 200 will not change abruptly, and the stress concentration problem caused by the abrupt change in the Z-direction positions of the stress points between the battery swap device and the bottom plate 200 can be avoided, thereby reducing the risk of wear of the bottom plate.

[0050] Optionally, the length L1 of the first protruding ribs 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 swap device during movement can be increased, and the risk of wear of the bottom plate can be further reduced. Along the second direction, the length of the first protruding ribs 211 is greater than or equal to 50% of the length of the battery swap device, which ensures that the bottom plate 200 and the battery swap device have sufficient contact area during relative movement, further reducing the risk of wear of the bottom plate 200.

[0051] 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-based epoxy coating, solvent-based polyurea coating, solvent-based acrylic coating, solvent-free epoxy coating, solvent-free polyurea coating, solvent-free acrylic coating, and PVC solvent-based coating.

[0052] The utility model also provides a kind of electric device.The utility model's electric device 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.The 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, and spacecraft can include airplane, rocket, space shuttle and spaceship and so on.

[0053] Up to now, the technical scheme of the utility model has been described in combination with the optional embodiments 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 the related technical features without deviating from the principles of the utility model, and the technical schemes after these changes or replacements will all fall within the protection scope of the utility model.

Claims

1. 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 provided with a convex rib and a flat part on the side facing away from the upper box, the back of the convex rib is provided with a concave cavity, the convex rib includes a first convex rib for contact with the battery swap 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.

2. The battery pack of claim 1, wherein, The convex rib further includes a second convex rib which is not used for contact with the battery swap device, the back of the second convex rib is provided with a second concave cavity, and a filling piece is arranged in the second concave cavity.

3. The battery pack of claim 2, wherein, The filling piece and the wall of the concave cavity are bonded.

4. The battery pack of claim 2, wherein, The filling piece is a foam.

5. The battery pack of claim 2, wherein, The battery pack further includes a support arranged between the battery monomer and the bottom plate, and the support and the flat part are bonded.

6. The battery pack of claim 2, wherein, The depth H1 of the convex rib satisfies: 10mm≥H1>0mm.

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

8. The battery pack of claim 7, wherein, The first convex rib includes a continuous support part continuously extending along the first direction, and the size of the continuous support part along the first direction is equal to the size of the bottom plate.

9. The battery pack of claim 7, wherein, The first convex rib includes a first column of intermittent support parts and a second column of intermittent support parts which intermittently extend along the first direction, the flat part arranged in the first column of intermittent support parts is a first flat part, the flat part arranged 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 the Z-direction height of the first column of intermittent support parts is the same as the Z-direction height of the second column of intermittent support parts.

10. The battery pack of claim 1, wherein, The length L1 of the first convex rib along the second direction satisfies: L1≥280mm.

11. The battery pack of claim 10, wherein, Along the second direction, the length of the first convex rib is greater than or equal to 50% of the length of the battery swap device.

12. The battery pack of claim 1, wherein, The side of the bottom plate facing away from the upper box is provided with a coating, and the material of the coating is selected from 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.

13. An electrical device, characterized by The battery pack includes the battery pack as claimed in any one of claims 1 to 12. The battery pack includes the battery pack as claimed in any one of claims 1 to 12.

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