A plastic support, a battery wrapping device, a battery pack and a battery module

Abstract

The application discloses a plastic support, a battery wrapping device, a battery pack and a battery module. The plastic support is used for supporting battery units, the battery units include a plurality of batteries arranged along a first direction and positioned relative to the plastic support, and adjacent batteries abut each other; the plastic support includes a plurality of support protrusions extending along the first direction, and at least two support protrusions are connected with each other through a connecting protrusion; the connecting protrusion includes a plurality of first protrusions and a plurality of second protrusions, the first protrusions are located at positions where the adjacent batteries abut each other along the first direction, and the second protrusions are located at middle parts of the batteries along the first direction; and projections of each first protrusion and each second protrusion on a plane perpendicular to the first direction are staggered and spaced from each other. The plastic support, the battery wrapping device, the battery pack and the battery module have the advantages of low cost, light weight and good insulation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a plastic support, a battery wrapping device, a battery pack and a battery pack. BACKGROUND

[0002] Batteries are widely used in energy storage devices, which generally include multiple battery modules, each battery module including a battery pack, which is often composed of multiple single batteries connected in series. In actual installation, due to the heavy weight of the batteries, the multiple single batteries connected in series are generally placed on a sheet metal part first, then packaged into a whole battery pack by a cable tie, and then placed into the box of the battery module. This packaging method is costly and makes the overall weight of the battery module heavier. In addition, since the box of the battery module is also made of sheet metal material, in order to meet the safety requirements, the battery pack needs to maintain a certain distance from the box wall after being placed in the box, thus making the overall volume of the battery module larger. SUMMARY

[0003] The present application aims to overcome the above-mentioned defects or problems in the background art, and provides a plastic support, a battery wrapping device, a battery pack and a battery module, which are low in cost, light in weight and good in insulation.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0005] Technical solution one, a plastic support for supporting battery units extending along a first direction, the battery units including a plurality of batteries arranged along the first direction and positioned relative to the plastic support, adjacent batteries abutting each other; the plastic support including a plurality of support protrusions arranged along a second direction perpendicular to the first direction, the support protrusions extending along the first direction, at least two support protrusions adjacent along the second direction being connected to each other by a connecting protrusion; the connecting protrusion including a plurality of first protrusions and a plurality of second protrusions, the first protrusions being located at the positions where the adjacent batteries abut each other along the first direction, the second protrusions being located at the middle portions of the batteries along the first direction; the projections of each first protrusion and each second protrusion on a plane perpendicular to the first direction being staggered and spaced from each other.

[0006] Based on technical solution one, technical solution two is also provided, in which the support protrusions are provided with a support surface adapted to support the batteries, and the connecting protrusions are provided with a connection surface flush with the support surface.

[0007] Based on technical solution two, technical solution three is also provided, in which each first protrusion between every two support protrusions is uniformly distributed along the first direction; and each second protrusion between every two support protrusions is uniformly distributed along the first direction.

[0008] Based on technical solutions one to three, there is also a technical solution four, in which the plastic support is a first box body with an opening, the first box body has a bottom wall, two first side walls extending in a first direction, and two second side walls extending in a second direction, the support protrusion and the connecting protrusion are formed on the bottom wall of the first box body, and the two first side walls and the two second side walls cooperate to position the battery relative to the plastic support; the battery unit is at least two, each battery unit is arranged in the second direction; the bottom wall is further provided with a first limiting protrusion between the adjacent battery units, the first limiting protrusion is provided with two first abutting surfaces which are away from each other and perpendicular to the second direction, and the two first abutting surfaces are adapted to abut the two adjacent battery units, respectively.

[0009] Based on technical solution four, there is also a technical solution five, in which in the connecting protrusion corresponding to each battery unit, each first protrusion is located in the middle of the battery unit in the second direction.

[0010] Technical solution six, the application also provides a battery wrapping device, which comprises a plastic support as described in technical solutions four or five; and a clamping member provided with a connecting wall and a cover which are integrated; one side of the connecting wall is integrated with one of the first side walls of the plastic support, and the other side is integrated with the cover; the cover is a second box body with an opening, and the opening of the second box body is opposite to the opening of the first box body so that the battery is adapted to be wrapped between the plastic support and the cover.

[0011] Based on technical solution six, there is also a technical solution seven, in which a plurality of limiting ribs extending in the first direction and arranged in a third direction perpendicular to the first direction and the second direction are formed on the connecting wall; at least two limiting ribs are respectively arranged at the connection between the connecting wall and the plastic support and the connection between the connecting wall and the cover.

[0012] Based on technical solution seven, there is also a technical solution eight, in which the box bottom of the cover is provided with a second limiting protrusion corresponding to the first limiting protrusion in the direction of the bottom wall, the second limiting protrusion is provided with two second abutting surfaces which are away from each other, and the two second abutting surfaces are adapted to abut each battery of the two adjacent battery units, respectively; the box bottom of the cover is also recessed in the direction of the bottom wall and provided with a plurality of first grooves extending in the first direction and a plurality of second grooves extending in the second direction; each second groove is arranged corresponding to the middle of each battery in the first direction; the cover is also provided with a plurality of exhaust holes corresponding to each battery unit.

[0013] Nine, the application also provides a battery pack, which comprises a plurality of batteries, the battery wrapping device and the adhesive wall in the eighth aspect, each battery is wrapped between the plastic support and the gland, the adhesive wall is suitable for connecting the plastic support and the gland away from the connecting wall on one side; the number of battery units is even, each two battery units form a battery pack, each battery has a positive electrode interface and a negative electrode interface on the side in the second direction; in each battery pack, the positive electrode interface and the negative electrode interface of each battery are arranged along a third direction perpendicular to the first direction and the second direction, and face another battery unit.

[0014] Ten, the application also provides a battery module, which comprises a box body and at least one battery pack in the ninth aspect, the front side of the box body is provided with an opening and a cover plate covering the opening, the front side of the plastic support of the battery pack is provided with a handle, and the battery pack is suitable for being placed into the box body through the opening.

[0015] From the above description of the application, compared with the prior art, the application has the following beneficial effects:

[0016] In the prior art, in order to ensure that the battery pack forms a whole, metal plates are often used to support the batteries, the cost of metal plates is high, and the safety requirements are high, so that the whole battery module is large in size. In the first technical aspect, the metal plates are completely abandoned, and plastic supports are used, and the cost of the plastic supports is lower than that of the metal plates.

[0017] But the skilled person in the art is also familiar with the fact that the strength of the plastic part is generally weak, which is difficult to support heavy objects, and in the first technical solution, the battery unit is supported by a plurality of support protrusions extending in the first direction, and the arrangement of the plurality of support protrusions in the second direction makes the entire plastic support part form multiple bends, greatly improving the strength; on this basis, the first technical solution further provides a connecting protrusion between the two adjacent support protrusions, which can prevent the deformation of the support protrusion and prevent the gap between the two adjacent support protrusions from being crushed and broken; further, since the position where the adjacent batteries abut each other forms a breaking point in the entire battery unit, pressure concentration is easily generated at the position where the batteries abut each other, thereby easily causing the plastic support part to deform at this position, and in the first technical solution, the first protrusion in the connecting protrusion is located at the position where the adjacent batteries abut each other, thereby increasing the strength of the abutting position of the adjacent batteries and effectively preventing the plastic support part from deforming at this position; and since the support protrusion extends in the first direction, the middle part of the support protrusion behind the battery is prone to deformation, and in the first technical solution, the second protrusion in the connecting protrusion is located in the middle part of the battery in the first direction, thereby increasing the strength of the support protrusion and effectively preventing the plastic support part from deforming at this position; more advantageously, the projections of each first protrusion and each second protrusion on a plane perpendicular to the first direction are staggered and spaced from each other, forming multiple points of reinforcement on the entire plastic support part, thereby producing a synergistic reinforcement effect.

[0018] In summary, the plastic support part of the first technical solution can support heavy batteries through the design of the structure of the plastic part, has low cost, and the battery pack formed in this way has a lighter weight, which can correspondingly reduce the weight of the battery module; in addition, the plastic part is an insulating material, which can increase the insulation of the battery pack and is beneficial to improve the large volume of the battery module.

[0019] In the second technical solution, the connecting protrusion is provided with a connecting surface flush with the support surface, so that the connecting protrusion not only increases the strength of the plastic support part, but also supports the battery, further preventing the deformation of the plastic support part.

[0020] In the third technical solution, each first protrusion between every two support protrusions is uniformly distributed in the first direction, and each second protrusion between every two support protrusions is uniformly distributed in the first direction, which is beneficial to form a uniform support force on the entire plastic support part and avoid deformation and rupture of the plastic support part due to uneven stress after being pressed.

[0021] In the fourth technical solution, the plastic support is a first box body with an opening, the bottom wall of the first box body can support the battery cells, and the first side wall and the second side wall of the first box body can limit the battery cells, which is simple in structure and easy to process; when a plurality of battery cells are placed in the plastic support, there is a movement allowance between the battery cells, and in the fourth technical solution, a first limiting protrusion is arranged, two first abutting surfaces of the first limiting protrusion which are away from each other can limit the adjacent battery cells from approaching each other, so that the plurality of battery cells can also be relatively fixed with the plastic support. In addition, the first limiting protrusion is bent at the middle part of the plastic support in the second direction, and the strength is greatly improved.

[0022] In the fifth technical solution, since the plastic support supports the battery cells, a concave part is easily generated at the middle part of the battery cells in the second direction, therefore, arranging each first protrusion at the middle part of the battery cells in the second direction can increase the strength of the plastic support corresponding to the middle part of each battery cell, and deformation and rupture of the plastic support caused by uneven stress after being pressed are avoided.

[0023] The sixth technical solution provides a battery wrapping device which has the plastic support in the above technical solutions and has the same technical advantages as the above technical solutions. In addition, the sixth technical solution also introduces a buckling piece which is integrated with the plastic support, therefore, during installation, the battery cells can be placed on the plastic support first, and then the gland of the buckling piece is pressed against the battery cells, and the buckling piece and the plastic support are tightly connected through an adhesive such as a tape; in the prior art, the batteries are generally bundled together by a strap, which is time-consuming and laborious, and even if the batteries are bundled into a battery pack by the strap, the batteries are still exposed to the metal environment, so that a large enough gap needs to be reserved to meet the safety requirements; in the sixth technical solution, the connecting wall and the gland of the buckling piece cooperate with the plastic support to basically enclose the outer surface of the battery cells, thereby improving the insulation of the entire battery pack, so that when the battery pack is placed in the box of the battery module, a larger safety gap does not need to be reserved, and the entire volume is also correspondingly reduced.

[0024] In the seventh technical solution, the limiting ribs are arranged on the connecting wall, so that the battery cells form a line contact with the connecting wall, and the line contact is more accurate than the surface contact, thereby further fixing the battery cells relative to the plastic support; since a folding line needs to be reserved between the connecting wall and the plastic support and between the connecting wall and the gland during the wrapping process of the battery cells, the folding line is prone to breakage, and in the seventh technical solution, the limiting ribs are arranged at the connection between the connecting wall and the plastic support and the gland, thereby increasing the strength of the connection; therefore, the limiting ribs can limit the battery cells on one hand and increase the strength of the entire battery wrapping device on the other hand.

[0025] In the eighth technical solution, since the battery is cuboid, it has a certain height. If the battery needs to be limited, and there is only one limiting point in the height direction, the battery is still easy to move relative to the plastic support. In the eighth technical solution, the second limiting protrusion is arranged on the pressing cover. The second limiting protrusion can cooperate with the first limiting protrusion to limit the battery at multiple points, thereby ensuring that the battery is fixed relative to the battery wrapping device. In addition, the second limiting protrusion is bent in the middle of the pressing cover in the second direction, and the strength is greatly improved. Similarly, when the pressing cover is pressed against the battery unit, it will also be subjected to the reaction force of the battery unit. If the strength of the pressing cover is not enough, it is easy to deform and break after being subjected to the reaction force of the battery. Therefore, in the eighth technical solution, the structure of the pressing cover is also designed. A plurality of first grooves extending in the first direction and a plurality of second grooves extending in the second direction are arranged. In this way, multiple bends are formed on the pressing cover, and the strength is greatly improved, thereby improving the strength of the entire wrapping device. Due to the arrangement of the second protrusion, the middle part of the battery will not be concave downward. However, when the pressing cover is pressed against the battery, the battery will still be subjected to a large pressure. In the ninth technical solution, each second groove corresponds to the middle part of each battery in the first direction, which can reduce the pressure applied by the pressing cover at the middle part of the battery. That is, the pressing cover can cooperate with the plastic support and produce a synergistic effect, so that the entire battery wrapping device is not easy to deform whether on the first supporting surface of the battery or on the second supporting surface of the battery.

[0026] The ninth technical solution discloses a battery pack which adopts the battery wrapping device in the above technical solution, and thus has the same technical effects as the above technical solution. The pressing cover and the plastic support are connected by the bonding wall away from the connecting wall, so that the packaging process of the battery pack is simpler. In actual application, a battery use identifier can also be arranged on the bonding wall. In addition, since the batteries are wrapped, wiring is still needed when the batteries are connected in series. A certain space needs to be reserved for wiring. In the above battery wrapping structure, there is a gap between the first limiting protrusion and the second limiting protrusion. In the ninth technical solution, the positive electrode interface and the negative electrode interface of each battery in each battery module are directed towards another battery unit, so that the positive electrode interface and the negative electrode interface of the battery are directed towards the gap between the battery units, thereby making full use of the gap between the battery units to wire the connected batteries. In this way, wiring is also convenient, and maintenance is also convenient.

[0027] The tenth technical solution discloses a battery module which adopts the battery pack in the above technical solution, and has the same technical effects as the above technical solution; in the prior art, the battery pack prepared by binding the batteries with the cable ties is supported by the sheet metal, the positive electrode interface and the negative electrode interface of the battery can only be arranged upwardly because the batteries need to be in close contact with each other, and the width of the battery is generally greater than the height of the battery, so that the distance between the battery pack and the wall of the box can be reduced, and the height of the box can also be reduced, thereby the volume of the battery module is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiment description are briefly introduced as follows, and obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0029] Figure 1 It is a schematic view of the battery wrapping device of the embodiment of the present application;

[0030] Figure 2 It is a bottom view of the battery wrapping device of the embodiment of the present application; Figure 1

[0031] Figure 3 It is a sectional view in the direction of B-B of the battery wrapping device of the embodiment of the present application; Figure 2

[0032] Figure 4 It is a schematic view of the battery wrapping device of the embodiment of the present application when it is unfolded;

[0033] Figure 5 It is a top view of the battery wrapping device of the embodiment of the present application; Figure 1

[0034] Figure 6 It is a sectional view in the direction of B-B of the battery wrapping device of the embodiment of the present application; Figure 5

[0035] Figure 7 It is a schematic view of the battery pack of the embodiment of the present application;

[0036] Figure 8 It is a schematic view of the battery pack of the embodiment of the present application;

[0037] Figure 9 It is a schematic view of the battery device of the embodiment of the present application.

[0038] Explanation of main reference signs:

[0039] ​​​​Plastic support 10; bottom wall 11; support protrusion 111; support surface 1111; connecting protrusion 112; connecting surface 1121; first protrusion 113; second protrusion 114; first limiting protrusion 115; first abutting surface 1151; first side wall 12; second side wall 13; handle 14; battery unit 20; battery 21; positive electrode interface 211; negative electrode interface 212; connecting wall 30; limiting rib 31; cover 40; second limiting protrusion 41; second abutting surface 411; first groove 42; second groove 43; exhaust hole 44; bonding wall 50; battery pack 100; box 200; opening 201; cover plate 202. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are preferred embodiments of the present application, and should not be regarded as exclusion of other embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0041] In the claims, specification, and above drawings of the present application, unless otherwise expressly limited, the use of the terms "first", "second", or "third" are not intended to denote a particular order or sequence unless explicitly stated.

[0042] In the claims, specification, and above drawings of the present application, unless otherwise expressly limited, the use of the terms "first", "second", or "third" are not intended to denote a particular order or sequence unless explicitly stated.

[0043] In the claims, specification, and above drawings of the present application, unless otherwise expressly limited, the use of the terms "first", "second", or "third" are not intended to denote a particular order or sequence unless explicitly stated.

[0044] In the claims, specification, and above drawings of the present application, unless otherwise expressly limited, the use of the terms "first", "second", or "third" are not intended to denote a particular order or sequence unless explicitly stated.

[0045] Referring toFigures 1-8 A plastic support 10 is used to support a battery unit 20 extending along a first direction, the battery unit 20 comprising a plurality of batteries 21 arranged along the first direction and positioned relative to the plastic support 10, adjacent batteries 21 abutting each other; wherein the length direction of the battery 21 is the first direction, the width direction of the battery 21 is the second direction, and the height direction of the battery 21 is the third direction, the first direction, the second direction and the third direction being orthogonal. In the embodiment, the battery unit 20 is at least two, each battery unit 20 being arranged along the second direction. It should be understood that the battery unit 20 can also be one.

[0046] In the prior art, in order to ensure that the battery pack 100 forms a whole, it is often necessary to support the battery 21 by sheet metal, which is high in cost and high in regulatory requirements, resulting in a large volume of the entire battery module. In the embodiment, the sheet metal is completely abandoned, and the plastic support 10 is used to support the battery 21, and the plastic support 10 is low in cost compared with the sheet metal. However, it is well known to those skilled in the art that the strength of the plastic part is generally weak, and it is difficult to support heavy objects, so it is necessary to improve the structure of the plastic support 10. In the embodiment, the support 10 is prepared by the plastic suction process.

[0047] Specifically, referring to Figure 2The plastic support 10 comprises a plurality of support protrusions 111 arranged along the second direction, the support protrusions 111 extend along the first direction, and at least two adjacent support protrusions 111 along the second direction are connected with each other by a connecting protrusion 112; the connecting protrusion 112 comprises a plurality of first protrusions 113 and a plurality of second protrusions 114, the first protrusions 113 are located at positions where the adjacent batteries 21 abut against each other along the first direction, and the second protrusions 114 are located at the middle part of the batteries 21 along the first direction; the projections of the first protrusions 113 and the second protrusions 114 on a plane perpendicular to the first direction are staggered and spaced from each other. The battery cells 20 are supported by the plurality of support protrusions 111 extending along the first direction, and the arrangement of the plurality of support protrusions 111 along the second direction makes the entire plastic support 10 form multiple bends, so that the strength is greatly improved; on this basis, the connecting protrusion 112 is further arranged between the two adjacent support protrusions 111, which can avoid the deformation of the support protrusions 111 on one hand, and can avoid the gap between the two adjacent support protrusions 111 from being squeezed and broken on the other hand; further, since the positions where the adjacent batteries 21 abut against each other form a breaking point in the entire battery cell 20, the position where the batteries 21 abut against each other is prone to pressure concentration, thereby easily causing the plastic support 10 to deform at this position, in the embodiment, the first protrusions 113 in the connecting protrusion 112 are located at the positions where the adjacent batteries 21 abut against each other, which increases the strength of the abutting position of the adjacent batteries 21, thereby effectively avoiding the deformation of the plastic support 10 at this position; and since the support protrusions 111 extend along the first direction, the middle part of the support protrusions 111 after supporting the batteries 21 is prone to deformation, in the embodiment, the second protrusions 114 in the connecting protrusion 112 are located at the middle part of the batteries 21 along the first direction, which can increase the strength of the support protrusions 111, thereby effectively avoiding the deformation of the plastic support 10 at this position; more advantageously, the projections of the first protrusions 113 and the second protrusions 114 on a plane perpendicular to the first direction are staggered and spaced from each other, which forms multiple strengthening points on the entire plastic support 10, and produces a synergistic strengthening effect.

[0048] Referring to Figure 1 and Figure 3, the plastic support 10 is a first box body with an opening 201, the first box body has a bottom wall 11, two first side walls 12 extending along a first direction and two second side walls 13 extending along a second direction, two ends of each first side wall 12 are respectively connected to two second side walls 13, the support protrusion 111 and the connecting protrusion 112 are formed on the bottom wall 11 of the first box body, the two first side walls 12 and the two second side walls 13 cooperate to position the battery 21 relative to the plastic support 10, wherein the distance between the two second side walls 13 corresponds to the length of the battery cell 20, the distance between the two first side walls 12 corresponds to the farthest distance between the two outermost battery cells 20, when the battery cell 20 is one, the distance between the two first side walls 12 corresponds to the width of the battery cell 20, when the battery cell 20 is multiple, there is a movement allowance in the second direction between the battery cells 20, and a limiting structure needs to be further provided, in the embodiment, the first limiting protrusion 115 is further protruded on the bottom wall 11 between the adjacent battery cells 20, the first limiting protrusion 115 is provided with two first abutting surfaces 1151 which are away from each other and perpendicular to the second direction, and the two first abutting surfaces 1151 are respectively adapted to abut against two adjacent battery cells 20. Figure 2 In the embodiment, the first limiting protrusion 115 is multiple, the multiple first limiting protrusions 115 are arranged at intervals along the first direction, each battery 21 is provided with two first limiting protrusions 115, and the two first limiting protrusions 115 are arranged corresponding to the middle part of the battery 21, but it should be understood that the first limiting protrusion 115 can also be only one, when the first limiting protrusion 115 is only one, the first limiting protrusion 115 extends along the first direction. In actual application, when there are multiple battery cells 20, the number of support protrusions 111 arranged for each battery cell 20 is equal, and the number of connecting protrusions 112 arranged for each battery cell 20 is equal.

[0049] The bottom wall 11 of the first box body can support the battery cell 20, the first side wall 12 and the second side wall 13 of the first box body can limit the battery cell 20, the structure is simple and easy to process, when multiple battery cells 20 are placed in the plastic support 10, the two first abutting surfaces 1151 of the first limiting protrusion 115 which are away from each other can limit the adjacent battery cells 20 from approaching each other, so that the multiple battery cells 20 can also be fixed relative to the plastic support 10. In addition, the first limiting protrusion 115 is bent in the middle part of the plastic support 10 along the second direction, and the strength is greatly improved.

[0050] In the embodiment, referring to Figure 3 The support protrusion 111 is provided with a support surface 1111 adapted to support the battery 21, and the connecting protrusion 112 is provided with a connection surface 1121 flush with the support surface 1111, so that the connecting protrusion 112 can not only increase the strength of the plastic support 10, but also support the battery 21, and further avoid the deformation of the plastic support 10.

[0051] In specific implementation, referring to Figure 2 , each first protrusion 113 between every two support protrusions 111 is uniformly distributed along the first direction; and each second protrusion 114 between every two support protrusions 111 is uniformly distributed along the first direction, thereby facilitating forming uniform support force on the entire plastic support 10 and avoiding deformation and rupture of the plastic support 10 due to uneven force after being pressed.

[0052] Since the plastic support 10 supports the battery unit 20, the middle part of each battery unit 20 along the second direction is prone to be concave. In the embodiment, among the connecting protrusions 112 corresponding to each battery unit 20, the first protrusions 113 are located at the middle part of the battery unit 20 along the second direction. Placing the first protrusions 113 at the middle part of the battery unit 20 along the second direction can increase the strength of the plastic support 10 at the middle part of each battery unit 20, thereby avoiding deformation and rupture of the plastic support 10 due to uneven force after being pressed. The first protrusions 113 in the same column along the first direction are defined as a first protrusion 113 column, and the second protrusions 114 in the same column along the first direction are defined as a second protrusion 114 column, referring to Figure 2 , the number of the second protrusion 114 columns is twice the number of the first protrusion 113 columns.

[0053] As can be seen from the above, the plastic support 10 of the embodiment can support a battery 21 with a large weight through the design of the structure of the plastic support, has low cost, and the battery pack 100 formed by packing in this way has a light weight, which can correspondingly reduce the weight of the battery module. In addition, the plastic support is made of insulating material, which can increase the insulation of the battery pack 100 and is beneficial to improving the large volume of the battery module.

[0054] In the prior art, the batteries 21 are generally bundled together by a strap, which is time-consuming and laborious. Even if the batteries 21 are bundled into a battery pack 100 by the strap, the batteries 21 are still exposed to the environment of the metal sheet, so that a large enough gap still needs to be reserved to meet the safety requirements. Therefore, the application further provides a battery wrapping device on the basis of the above plastic support 10, which can wrap the batteries 21 without using a strap.

[0055] Still referring to Figures 1-7 , the battery wrapping device comprises the plastic support 10 and a fastening member in the above embodiment. The fastening member is provided with a connecting wall 30 and a cover 40 which are connected as one body. One side of the connecting wall 30 is connected as one body with one of the first side walls 12 of the plastic support 10, and the other side is connected as one body with the cover 40. The cover 40 is a second box body with an opening 201. The opening 201 of the second box body is opposite to the opening 201 of the first box body, so that the batteries are adapted to be wrapped between the plastic support 10 and the cover 40, Figure 1 、 Figures 3-4 andFigures 6-7 In some embodiments, the first box body and the second box body have the same projection area along the third direction.

[0056] In some embodiments, referring to Figure 3 and Figure 6 a plurality of limiting ribs 31 are formed on the connecting wall 30, the limiting ribs 31 extend along the first direction and are arranged along the third direction, and at least two limiting ribs 31 are respectively arranged at the connecting position of the connecting wall 30 and the plastic support 10 and the connecting position of the connecting wall 30 and the cover 40. The limiting ribs 31 make the battery unit 20 form a line contact with the connecting wall 30, and the line contact is more accurate than a surface contact, thereby further fixing the battery unit 20 relative to the plastic support 10. In the wrapping process of the battery unit 20, a folding line needs to be reserved between the connecting wall 30 and the plastic support 10 and between the connecting wall 30 and the cover 40, and the folding line is prone to breakage. In the present embodiment, the limiting ribs 31 are arranged at the connecting positions of the connecting wall 30 and the plastic support 10 and the cover 40, thereby increasing the strength of the connecting positions. Therefore, the limiting ribs 31 can limit the battery unit 20 on one hand and increase the strength of the entire battery wrapping device on the other hand.

[0057] Since the battery 21 is a cuboid, it has a certain height. If the battery 21 needs to be limited, there is only one limiting point in the height direction, and the battery 21 is still prone to moving relative to the plastic support 10. In the present embodiment, referring to Figures 3-6 the box bottom of the cover 40 is provided with a second limiting protrusion 41 corresponding to the first limiting protrusion 115 facing the bottom wall 11, the second limiting protrusion 41 is provided with two second abutting surfaces 411 facing away from each other and perpendicular to the second direction, and the two second abutting surfaces 411 are respectively adapted to abut against two adjacent battery units 20. The second limiting protrusion 41 is arranged on the cover 40, and the second limiting protrusion 41 can cooperate with the first limiting protrusion 115 to limit the battery 21 at multiple points, thereby ensuring that the battery 21 is fixed relative to the battery wrapping device. In addition, the second limiting protrusion 41 is bent at the middle part of the cover 40 along the second direction, thereby greatly improving the strength. Figures 4-5 In some embodiments, the second limiting protrusion 41 is a plurality of second limiting protrusions 41, the plurality of second limiting protrusions 41 are arranged at intervals along the first direction, each battery 21 is provided with two second limiting protrusions 41, and the two second limiting protrusions 41 are arranged corresponding to the middle part of the battery 21. However, it should be understood that the second limiting protrusion 41 can also be only one, and when there is only one second limiting protrusion 41, the second limiting protrusion 41 extends along the first direction.

[0058] Similarly, the cover 40 is also subjected to the reaction force of the battery cell 20 when pressing against the battery cell 20, and if the strength of the cover 40 is not enough, the cover 40 is easily deformed and damaged under the reaction force of the battery 21. Therefore, the structure of the cover 40 is also designed in the embodiment, specifically, the bottom of the cover 40 is also recessed towards the bottom wall 11 and is provided with a plurality of first grooves 42 extending along the first direction and a plurality of second grooves 43 extending along the second direction. In this way, the cover 40 is formed with multiple bends, and the strength is greatly improved, thereby improving the strength of the entire wrapping device. Further, each second groove 43 corresponds to the middle part of each battery 21 along the first direction, and the first groove 42 and the second groove 43 form multiple points of the cover 40, and the strength is greatly improved. Due to the arrangement of the second protrusion 114, the middle part of the battery 21 is not recessed downward, but when the cover 40 presses against the battery 21, the battery 21 is still subjected to a large pressure. In the embodiment, the second groove 43 corresponds to the middle part of the battery 21, so as to reduce the pressure applied by the cover 40 to the middle part of the battery 21. That is, the cover 40 can cooperate with the plastic support 10 and produce a synergistic effect, so that the entire battery wrapping device is not easy to deform on the first supporting surface of the battery 21 or on the second supporting surface of the battery 21.

[0059] The cover 40 is also provided with a plurality of exhaust holes 44 corresponding to each battery cell 20 to facilitate pressing, Figure 5 Each exhaust hole 44 corresponding to each battery cell 20 is arranged along the first direction, and each battery 21 is provided with two exhaust holes 44.

[0060] The battery wrapping device of the embodiment introduces the fastening piece integrated with the plastic support 10, so that when installing, the battery cell 20 can be placed on the plastic support 10 first, and then the cover 40 of the fastening piece is pressed against the battery cell 20, and the fastening piece and the plastic support 10 are tightly connected through the adhesive tape. In the embodiment, the connecting wall 30 and the cover 40 of the fastening piece cooperate with the plastic support 10 to substantially surround the outer surface of the battery cell 20, thereby improving the insulation of the entire battery pack 100, so that when the battery pack 100 is placed in the box 200 of the battery module, a large safety clearance does not need to be reserved, and the entire volume is also correspondingly reduced.

[0061] The application also provides a battery pack 100, as shown in Figures 7-8, including several batteries 21, the battery wrapping device in the above embodiment and the bonding wall 50, each battery 21 is wrapped between the plastic support 10 and the gland 40, the bonding wall 50 is suitable for connecting the plastic support 10 and the gland 40 away from the side of the connecting wall 30, in actual use, the battery use mark can be provided on the outside of the bonding wall 50, during packaging, the gland 40 and the plastic support 10 are connected away from the side of the connecting wall 30 through the bonding wall 50, so that the packaging process of the battery pack is more simple, and the battery use mark is provided on the bonding wall 50, which is more flat compared with the part on the battery wrapping device, so it is more eye-catching, and the use mark information can be printed on the bonding wall in advance or directly written on the bonding wall 50 in actual application, so that the use mark can be pasted through the packaging of the battery, which is more labor-saving; the number of battery units 20 is even, and each two battery units 20 are combined to form a battery pack, each battery 21 is provided with a positive electrode interface 211 and a negative electrode interface 212 on the side in the second direction, and the positive electrode interface 211 and the negative electrode interface 212 of each battery 21 are arranged in the third direction and face the other battery unit 20.

[0062] Since the batteries 21 are wrapped, the batteries 21 still need to be wired when connected in series, and a certain space needs to be reserved for wiring, and in the above battery wrapping structure, there is a gap between the first limiting protrusion 115 and the second limiting protrusion 41, and in the embodiment, the positive electrode interface 211 and the negative electrode interface 212 of the battery 21 face the other battery unit 20, that is, the positive electrode interface 211 and the negative electrode interface 212 of the battery 21 face the gap between the battery units 20, so that the gap between the battery units 20 can be fully utilized to wire the connected batteries 21, so that the wiring is also convenient and the maintenance is also convenient.

[0063] The application also provides a battery module, referring to Figure 9 , which comprises a box body 200 and at least one battery pack 100 in the above embodiment, the front side of the box body 200 is provided with an opening 201 and a cover plate 202 suitable for plugging the opening 201, and the front side of the plastic support 10 of the battery pack 100 is provided with a handle 14, the battery pack 100 is suitable for being placed into the box body 200 through the opening 201, and the handle 14 is convenient for pulling the battery pack 100.

[0064] It can be known that the battery module has the same technical advantages as the above-mentioned embodiments. In the prior art, the battery pack 100 prepared by binding the batteries 21 with the cable ties, since the batteries 21 need to be in close contact with each other, the positive electrode interface 211 and the negative electrode interface 212 of the battery 21 can only be arranged upwardly. The width of the battery 21 along the second direction is generally greater than the height of the battery 21 along the third direction. Therefore, under the condition that the area of the box body 200 is the same, the distance between the battery pack 100 and the wall of the box body 200 can be reduced by using the battery pack 100 in the above-mentioned embodiments, and the height of the box body 200 can also be reduced, thereby reducing the volume of the battery module.

[0065] The above description and the embodiments are used to explain the protection scope of the present application, but do not constitute a limitation on the protection scope of the present application. Through the inspiration of the present application or the above-mentioned embodiments, the modification, equivalent replacement or other improvement of the embodiments of the present application or one part of the technical features can be obtained by the ordinary skilled person in the art combining with the common knowledge, the ordinary technical knowledge in the art and / or the prior art through the logical analysis, reasoning or limited test, and should be included in the protection scope of the present application.

Claims

1. A plastic support member (10) for supporting a battery unit (20) extending in a first direction, said battery unit (20) comprising a plurality of batteries (21) arranged in the first direction and positioned relative to said plastic support member (10) with adjacent ones of said batteries (21) abutting one another; characterized in that, The plastic support (10) comprises a plurality of support protrusions (111) arranged along a second direction perpendicular to the first direction, the support protrusions (111) extend along the first direction, and at least two adjacent support protrusions (111) along the second direction are connected to each other by a connecting protrusion (112); the connecting protrusion (112) comprises a plurality of first protrusions (113) and a plurality of second protrusions (114), the first protrusions (113) are located at positions where the adjacent batteries (21) abut each other along the first direction, and the second protrusions (114) are located at the middle of the batteries (21) along the first direction; the projections of each first protrusion (113) and each second protrusion (114) on a plane perpendicular to the first direction are staggered and spaced apart from each other.

2. A plastic support (10) as claimed in claim 1, characterized in that The support protrusions (111) are provided with support surfaces (1111) suitable for supporting the batteries (21), and the connecting protrusions (112) are provided with abutment surfaces (1121) flush with the support surfaces (1111).

3. A plastic support (10) as claimed in claim 2, characterized in that The first protrusions (113) between every two support protrusions (111) are uniformly distributed along the first direction; and the second protrusions (114) between every two support protrusions (111) are uniformly distributed along the first direction.

4. A plastic support (10) as claimed in any one of claims 1-3, characterized in that The plastic support (10) is a first box body with an opening (201), the first box body has a bottom wall (11), two first side walls (12) extending along the first direction, and two second side walls (13) extending along the second direction, the support protrusions (111) and the connecting protrusions (112) are formed on the bottom wall (11) of the first box body, and the two first side walls (12) and the two second side walls (13) cooperate to position the batteries (21) relative to the plastic support (10); the battery units (20) are at least two, and each battery unit (20) is arranged spaced apart along the second direction; the bottom wall (11) is further provided with a first limiting protrusion (115) protruding between the adjacent battery units (20), and the first limiting protrusion (115) is provided with two first abutting surfaces (1151) facing away from each other and perpendicular to the second direction, and the two first abutting surfaces (1151) are suitable for abutting the two adjacent battery units (20), respectively.

5. A plastic support (10) as claimed in claim 4, characterized in that In the connecting protrusion (112) corresponding to each battery unit (20), each first protrusion (113) is located at the middle of the battery unit (20) along the second direction.

6. A battery wrapping apparatus characterized by, The plastic support (10) is as claimed in claim 4 or 5; and The buckle member is provided with a connecting wall (30) and a cover (40) connected as one body; one side of the connecting wall (30) is connected as one body with one of the first side walls (12) of the plastic support (10), and the other side is connected as one body with the cover (40); and the cover (40) is a second box body with an opening (201), and the opening (201) of the second box body is opposite to the opening (201) of the first box body so that the batteries are suitable to be wrapped between the plastic support (10) and the cover (40). ​ 7. A battery wrapping apparatus as claimed in claim 6, wherein, The connecting wall (30) is formed with a plurality of limiting ribs (31) extending along the first direction and arranged along a third direction perpendicular to the first direction and the second direction; wherein at least two limiting ribs (31) are respectively arranged at the connecting position of the connecting wall (30) and the plastic support (10) and the connecting position of the connecting wall (30) and the pressure cover (40).

8. A battery wrapping apparatus as claimed in claim 6 or 7, wherein, The box bottom of the pressure cover (40) is protruded towards the bottom wall (11) and is provided with a second limiting protrusion (41) corresponding to the first limiting protrusion (115), the second limiting protrusion (41) is provided with two second abutting surfaces (411) facing away from each other and perpendicular to the second direction, and the two second abutting surfaces (411) are respectively adapted to abut two adjacent battery units (20); the box bottom of the pressure cover (40) is also recessed towards the bottom wall (11) and is provided with a plurality of first grooves (42) extending along the first direction and a plurality of second grooves (43) extending along the second direction; each second groove (43) is arranged corresponding to the middle part of each battery (21) along the first direction; the pressure cover (40) is also provided with a plurality of exhaust holes (44) corresponding to each battery unit (20).

9. A battery pack (100) characterized by, It comprises a plurality of batteries (21), the battery wrapping device of claim 8 and the bonding wall (50), each battery (21) is wrapped between the plastic support (10) and the pressure cover (40), the bonding wall (50) is adapted to connect the plastic support (10) and the pressure cover (40) away from one side of the connecting wall (30); the number of battery units (20) is even, and each two battery units (20) form a battery pack, and each battery (21) is provided with a positive electrode interface (211) and a negative electrode interface (212) at the side part along the second direction; in each battery pack, the positive electrode interface (211) and the negative electrode interface (212) of each battery (21) are arranged along a third direction perpendicular to the first direction and the second direction, and face another battery unit (20).

10. A battery module characterized by, It comprises a box body (200) and at least one battery pack (100) as claimed in claim 9, the front side of the box body (200) is provided with an opening (201) and a cover plate (202) covering the opening (201), and the front side of the plastic support (10) of the battery pack (100) is provided with a handle (14), and the battery pack (100) is adapted to be placed into the box body (200) through the opening (201).

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