Battery

Abstract

The utility model provides a battery. The battery comprises a shell and a battery cell, the shell comprises a first shell and a second shell which are connected with each other, the shell comprises a first side wall, the first side wall comprises a main body area and a sunken area, the sunken area is sunken towards the direction of the battery cell relative to the main body area, and the sunken area comprises a first wall, a second wall and a first corner arranged between the first wall and the second wall; the battery cell comprises a first main body part and a second main body part, the second main body part protrudes from the first main body part to the direction away from the first main body part, and a second corner is formed between the second main body part and the first main body part; the insulating support structure is arranged between the shell and the battery cell, and at least part of the insulating support structure is positioned between the first corner and the second corner and is connected with the shell, so that the risk of serious deformation of the shell and the battery cell is reduced, and the safety of the battery is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely relates to a battery. BACKGROUND

[0002] Battery, such as lithium ion battery, not only is widely used on portable electronic equipment such as mobile phone, notebook computer, and also is widely used in electric automobile, electric bicycle and other electric equipment aspects.

[0003] Battery includes electric core and the shell that covers in electric core outside, and electric core is the core component of battery.In the high temperature swelling of battery, the shell of battery of relevant technology is easy to be severely bent and deformed under the action such as high temperature gas in the battery, and then will cause the electric core in the shell to be deformed excessively, and this can easily lead to the damage of electric core or the risk of short circuit caused by the deformation contact of pole piece, and then lead to the security risk of battery. SUMMARY

[0004] Therefore, the utility model embodiment is dedicated to providing a battery to reduce the risk of severe deformation of the shell and the electric core to some extent.

[0005] The utility model provides a kind of battery, including shell and electric core;

[0006] The shell includes first shell and second shell, and the second shell is arranged on the first shell, and the first shell and the second shell are jointly enclosed to form a containing cavity, and the electric core is located in the containing cavity;The edge of the first shell and the edge of the second shell are connected;

[0007] The shell includes first side wall, and the first side wall includes main body area and recessed area on the side of the main body area in the first direction, and the recessed area is recessed relative to the direction of the main body area towards the electric core;The recessed area includes first wall, second wall and first corner arranged between the first wall and the second wall;

[0008] The electric core includes first main body part and second main body part, and the second main body part is arranged protruding in the direction away from the first main body part by part of the first main body part;Second corner is formed between the second main body part and the first main body part, and the second corner is arranged corresponding to the first corner;

[0009] Insulating support structure is arranged between the shell and the electric core, and at least part of the insulating support structure is located between the first corner and the second corner, and is connected with the shell.

[0010] Optionally, the insulating support structure includes insulating support main body, and the insulating support main body has a buffer hole.

[0011] At least part of the insulating support body is located between the first corner and the second corner and is connected with the shell.

[0012] Optionally, the insulating support body comprises at least two insulating buffer layers stacked along the second direction, and each of the insulating buffer layers is provided with the buffer holes;

[0013] In the two adjacent insulating buffer layers, at least part of the buffer holes on one of the insulating buffer layers are projected on the other insulating buffer layer in a staggered manner with the buffer holes on the other insulating buffer layer;

[0014] And / or, the material of the insulating support body is selected from at least one of rubber, polyethylene, polypropylene, and polyethylene terephthalate.

[0015] Optionally, the insulating support structure comprises insulating adhesive tape, and at least part of the insulating adhesive tape is bonded between the first corner and the second corner.

[0016] Alternatively, the insulating support structure comprises solidifiable insulating adhesive filled between the shell and the battery cell, and at least part of the insulating adhesive is located between the first corner and the second corner.

[0017] Optionally, the second corner comprises an arc segment, and the arc segment protrudes in a direction away from the shell.

[0018] At least part of the insulating support structure is arranged on the arc segment.

[0019] Optionally, the insulating support structure covers the entire arc segment.

[0020] Optionally, the second corner further comprises a first extension segment and a second extension segment; the first extension segment forms part of the outer wall of the second main body part, the second extension segment forms part of the outer wall of the first main body part, the extension line of the first extension segment intersects the extension line of the second extension segment, and the arc segment is connected between the first extension segment and the second extension segment.

[0021] The insulating support structure extends to the first extension segment, and / or the insulating support structure extends to the second extension segment.

[0022] Optionally, the insulating support structure covers the entire first extension segment, and / or the insulating support structure covers the entire second extension segment.

[0023] Optionally, in the second direction, the thickness of the insulating support structure is not greater than the thickness of the shell wall of the shell at least at the position corresponding to the insulating support structure.

[0024] and / or, in the second direction, the thickness of the insulating support structure is not less than 0.1mm;

[0025] and / or, in the third direction, the height of the insulating support structure is not less than the height of the battery cell.

[0026] Optionally, the insulating support structure is connected with the battery cell.

[0027] and / or, the insulating support structure is wrapped on the outside of the battery cell.

[0028] and / or, at least part of the insulating support structure is matched with the shape of the second corner, and at least part of the insulating support structure is arranged in close contact with the second corner.

[0029] and / or, the second main body part is perpendicular to the first main body part.

[0030] and / or, the first wall and the second wall are perpendicular.

[0031] and / or, the shell is a steel shell.

[0032] and / or, the edge of the first shell body is provided with a first flange extending away from the accommodating cavity, and the first flange is arranged along the circumference of the first shell body.

[0033] The edge of the second shell body is provided with a second flange extending away from the accommodating cavity, and the second flange is arranged along the circumference of the second shell body, and the first flange and the second flange are correspondingly arranged and welded.

[0034] The battery provided by the utility model has the following advantages: the shell comprises a first shell body and a second shell body connected with each other, the shell comprises a first side wall, the first side wall comprises a main body area and a recessed area located on one side of the main body area in a first direction, the recessed area is recessed towards the direction of the battery cell relative to the main body area, the recessed area comprises a first wall, a second wall and a first corner located between the first wall and the second wall, the battery cell comprises a first main body part and a second main body part, the second main body part is arranged in a protruding manner away from the first main body part, the second main body part and the first main body part form a second corner arranged correspondingly with the first corner, thereby forming a special-shaped battery structure, the diversified requirements of the battery structure are met, for example, the special-shaped battery formed can be matched with a special-shaped battery compartment of an electronic device, and the shape of the battery cell and the shell is matched, so that the battery cell can effectively utilize the space inside the shell, and the energy density of the battery cell is improved.

[0035] By arranging the insulating support structure between the shell and the battery cell, at least part of the insulating support structure is located between the first corner of the shell and the second corner of the battery cell and connected with the shell, so that at least the structural strength of the first corner of the shell is improved from the shell, so that the first corner of the shell is not easily close to each other to be pressed and wrinkled when the battery is inflated at high temperature, that is, the deformation of the shell is inhibited to a certain extent, the risk of mutual approach of the first corner of the shell is reduced, and the risk of serious deformation of the shell is avoided to a certain extent, thereby avoiding the damage of the battery cell, the risk of short circuit of the pole piece and the like, and the safety of the battery is improved.

[0036] Moreover, from the battery cell, the existence of the insulating support structure at least plays a certain supporting role on the second corner of the battery cell, when the second corner of the battery cell has a tendency to deform by approaching each other, due to the supporting effect of the insulating support structure on the second corner of the battery cell, the degree of deformation of the battery cell is effectively inhibited, the risk of excessive deformation of the battery cell is reduced, and the risk of damage of the battery cell, the risk of short circuit of the pole piece and the like is avoided to a certain extent, and the safety of the battery is improved. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 A structure diagram of a battery cell in the battery according to an embodiment of the present application;

[0038] Figure 2 A sectional structure diagram of the battery according to an embodiment of the present application;

[0039] Figure 3 A structure diagram of the battery according to an embodiment of the present application Figure 1 ;

[0040] Figure 4 A structure diagram of the battery according to an embodiment of the present application Figure 3 .

[0041] Figure 5 A structure diagram of the battery according to an embodiment of the present application Figure 1 .

[0042] Figure 6 A structure diagram of the battery according to an embodiment of the present application Figure 2 .

[0043] Figure 7 A structure diagram of the battery according to an embodiment of the present application Figure 6 .

[0044] Figure 8 A structure diagram of the battery according to an embodiment of the present application Figure 2 .

[0045] Wherein, 1, the shell; 11, first housing; 111, first flange; 12, second housing; 121, second flange; 13, first side wall; 131, main body area; 132, recessed area; 133, first wall; 134, second wall; 135, first corner; 14, second side wall; 15, third side wall; 16, fourth side wall; 2, the battery cell; 20, second corner; 201, arc segment; 202, first extension segment; 203, second extension segment; 21, first main body part; 22, second main body part; 3, insulation support structure; 30, buffer hole; 31, insulation buffer layer; 32, arc insulation segment; 33, first insulation segment; 34, second insulation segment. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the utility model belong to the scope of protection of the utility model.

[0047] The battery includes a battery cell and a shell wrapped outside the battery cell, and the battery cell is the core component of the battery. The battery cell can include a positive plate, a negative plate, and a separator between the positive plate and the negative plate for isolating the positive plate and the negative plate from contacting.

[0048] When the battery is subjected to high-temperature swelling, the shell of the battery is prone to bending deformation under the action of high-temperature gas inside the battery, for example, when the battery is a special-shaped battery with a corner, if the battery is subjected to high-temperature swelling, high-temperature gas is generated in the inner cavity of the shell, which is prone to cause the shell to swell, the two sides of the corner of the shell to approach each other, and the shell to be squeezed and wrinkled, resulting in serious deformation of the shell. When the shell is severely deformed or seriously indented, the battery cell inside the shell will be deformed excessively, which is prone to cause damage to the battery cell or deformation of the positive plate and other components, resulting in a short circuit risk, and further causing the battery to have a safety hazard.

[0049] Therefore, the utility model embodiment provides a battery, the first main body part and the second main body part of the battery cell form a second corner corresponding to the position of the first corner of the shell, at least part of the insulation support structure is located between the first corner and the second corner and connected with the shell, so that the second corner of the battery cell is supported by the insulation support structure, and the structural strength of the first corner of the shell is enhanced, which to some extent inhibits the deformation of the shell and the battery cell, reduces the risk of the two sides of the corner of the shell approaching each other and causing the shell to deform excessively when the battery swells, and reduces the risk of the battery cell being deformed excessively due to the deformation of the shell, thereby improving the safety of the battery.

[0050] The battery provided by the utility model will be described in detail below with reference to the specific embodiments and the accompanying drawings.

[0051] The battery provided by the utility model will be described in detail below with reference to the specific embodiments and the accompanying drawings.

[0052] Referring to Figures 1 to 8 The battery provided by the utility model will be described in detail below with reference to the specific embodiments and the accompanying drawings.

[0053] Referring to Figure 2 The battery provided by the utility model will be described in detail below with reference to the specific embodiments and the accompanying drawings.

[0054] Exemplarily, the edge of the first shell body 11 is provided with a first flange 111 extending away from the accommodating cavity, and the first flange 111 is arranged along the circumference of the first shell body 11. The edge of the second shell body 12 is provided with a second flange 121 extending away from the accommodating cavity, and the second flange 121 is arranged along the circumference of the second shell body 12. The first flange 111 and the second flange 121 are correspondingly arranged, and in the assembly process, the first flange 111 and the second flange 121 can be welded to realize the sealed connection between the first shell body 11 and the second shell body 12.

[0055] In the implementation process, the shell 1 can be a metal shell, and specifically can be a steel shell. When the shell 1 is a steel shell, the battery can be a cylindrical lithium ion battery. The steel shell can also play a role in dispersing heat when the temperature of the battery is high. Of course, in other implementation manners, the shell 1 can also be made of other metal materials.

[0056] Referring to Figure 3 The shell 1 can specifically include a first side wall 13, a second side wall 14, a third side wall 15, and a fourth side wall 16. The first side wall 13 and the second side wall 14 are oppositely arranged, for example, the first side wall 13 and the second side wall 14 are arranged along the length direction of the shell 1. The third side wall 15 and the fourth side wall 16 are oppositely arranged, for example, the third side wall 15 and the fourth side wall 16 are arranged along the length direction of the shell 1. Figure 3The upper and lower directions of the shell 1 are opposite. The third side wall 15 and the fourth side wall 16 are opposite, and the third side wall 15 is connected between the first side wall 13 and the second side wall 14, and the fourth side wall 16 is connected between the first side wall 13 and the second side wall 14. For example, the third side wall 15 and the fourth side wall 16 are opposite along the left and right directions of the shell 1. Figure 3 The left and right directions of the shell 1 are opposite.

[0057] The first side wall 13 includes a main body region 131 and a recessed region 132 located on the side of the main body region 131 along the first direction. The first direction here can be the left and right direction of the shell 1. For example, the recessed region 132 is located on the left side of the main body region. Figure 3 The left and right directions of the shell 1 are opposite.

[0058] The recessed region 132 includes a first wall 133, a second wall 134, and a first corner 135 disposed between the first wall 133 and the second wall 134. For example, the end of the first wall 133 away from the first corner 135 can be connected to the main body region 131. That is, the shell 1 is substantially L-shaped, and the corner of the L-shaped shell is the first corner 135 described above.

[0059] The battery cell 2 includes a first main body portion 21 and a second main body portion 22. For example, the second main body portion 22 can be located on the side of the first main body portion 21 along the first direction. Referring to Figure 1 , Figure 3 and Figure 6 , the first direction here can be the left and right direction of the shell 1. For example, the second main body portion 22 is located on the left side of the first main body portion 21 along the left and right direction. Figure 1 , Figure 3 and Figure 6 The left and right directions of the shell 1 are opposite.

[0060] The second main body portion 22 is protrudingly disposed from the first main body portion 21 in a direction away from the first main body portion 21. For example, the first main body portion 21 can correspond to the main body region 131, and the second main body portion 22 can correspond to the recessed region 132.

[0061] The second main body portion 22 and the first main body portion 21 form a second corner 20 therebetween. The second corner 20 is disposed corresponding to the first corner 135.

[0062] That is, the battery of the present embodiment can be a special-shaped battery, so that the battery can meet the needs of structural diversification, such as making the special-shaped battery can be adapted to the special-shaped battery compartment of the electronic device. Moreover, since the shape of the battery cell 2 and the shell 1 are substantially adapted, the battery cell 2 can effectively utilize the space inside the shell 1, which is conducive to the improvement of the energy density of the battery cell 2.

[0063] Continuing to refer to Figure 1 , Figure 3 andFigure 6 As shown, in some embodiments, the first wall 133 and the second wall 134 can be perpendicular. The second body part 22 can be perpendicular to the first body part 21.

[0064] For example, the second body part 22 is protruded to the left from the lower half of the left side of the first body part 21 to form an L-shaped battery cell structure, and the bending part of the L-shaped battery cell is the second corner 20. The shell 1 is wrapped outside the battery cell 2 to form an L-shaped battery structure.

[0065] Of course, in other implementations, the second body part 22 can also be not perpendicular to the first body part 21. The first wall 133 and the second wall 134 can also be not perpendicular.

[0066] For example, the first body part 21 and the second body part 22 can be an integrated structure, such as cutting after stacking the positive and negative electrode sheets and the separator, or cutting the positive and negative electrode sheets and the separator respectively and then stacking them to form the battery cell 2 with the first body part 21 and the second body part 22.

[0067] When the battery expands at high temperature, the corner of the shell is prone to severe bending deformation under the action of internal high-temperature gas. The two sides of the corner of the shell move and press towards each other, which can cause damage to the battery cell, deformation of the electrode sheet, short circuit, and other risks, and can cause safety hazards to the battery.

[0068] To at least improve this problem, in the present embodiment, an insulating support structure 3 is arranged between the shell 1 and the battery cell 2, and at least part of the insulating support structure 3 is located between the first corner 135 and the second corner 20 and connected with the shell 1.

[0069] At least part of the insulating support structure 3 located between the first corner 135 and the second corner 20 specifically includes: the insulating support structure 3 is arranged only at the position between the first corner 135 and the second corner 20, or part of the insulating support structure 3 is located at the position between the first corner 135 and the second corner 20, and another part of the insulating support structure 3 is located at a part of the area outside the first corner 135 and the second corner 20, or the insulating support structure 3 is wrapped outside the entire battery cell 2.

[0070] In addition, at least part of the insulating support structure 3 located between the first corner 135 and the second corner 20 can be: the insulating support structure 3 is connected with the battery cell 2, or the insulating support structure 3 is not connected with the battery cell 2.

[0071] When the insulating support structure 3 is not connected with the battery cell 2, that is, at least part of the insulating support structure 3 is located between the first corner 135 of the shell 1 and the second corner 20 of the battery cell 2, the insulating support structure 3 is not connected with the battery cell 2, but is connected with the shell 1. In this case, from the perspective of the shell 1, the arrangement of the insulating support structure 3 at least improves the structural strength at the first corner 135 of the shell 1, so that the first corner 135 of the shell 1 is not prone to deformation, which to a certain extent inhibits the deformation of the shell 1, and to a certain extent avoids the situation that the first corner 135 of the shell 1 is deformed seriously due to the mutual approach of both sides of the first corner 135 of the shell 1, and further causes the deformation of the battery cell to be too large, thereby avoiding the risk of damage to the battery cell, short circuit of the pole piece and other risks caused by the deformation of the battery cell being too large, and improving the safety of the battery. From the perspective of the battery cell 2, the presence of the insulating support structure 3 at least plays a certain supporting role at the second corner 20 of the battery cell 2, which can to a certain extent inhibit the deformation of both sides of the second corner 20 of the battery cell 2 when the shell 1 is deformed, that is, it plays a certain inhibiting role on the deformation of the battery cell 2, reduces the risk of the battery cell being deformed too much, and improves the safety of the battery.

[0072] When the insulating support structure 3 is connected with the battery cell 2, that is, at least part of the insulating support structure 3 is located between the first corner 135 of the shell 1 and the second corner 20 of the battery cell 2, and the insulating support structure 3 is connected with the battery cell 2 and the shell 1 respectively. In this way, from the perspective of the shell 1, the insulating support structure 3 not only improves the structural strength at the first corner 135 of the shell 1, but also to a certain extent plays a supporting role on the shell 1 due to the connection of the insulating support structure 3 with the battery cell 2, thereby further inhibiting the deformation of the shell 1, so that the shell 1 is not prone to deformation, and further reducing the risk of the shell 1 being deformed seriously and the battery cell 2 being deformed seriously when the battery is inflated at high temperature, thereby improving the safety of the battery. From the perspective of the battery cell 2, the presence of the insulating support structure 3 not only at least plays a certain supporting role at the second corner 20 of the battery cell 2, but also at least strengthens the structural strength at the second corner 20 of the battery cell 2, thereby further inhibiting the deformation of the battery cell 2, and to a certain extent avoiding the risk of damage to the battery cell, short circuit and other risks caused by the deformation of the battery cell 2 being too large due to the influence of the shell 1, thereby improving the safety of the battery.

[0073] The battery provided by the embodiment includes a shell 1, which includes a first shell 11 and a second shell 12 connected to each other, so that the shell 1 includes a first side wall 13, the first side wall 13 includes a main body area 131 and a recessed area 132 located on one side of the main body area 131 in a first direction, the recessed area 132 is recessed towards the direction of the battery cell 2 relative to the main body area 131, and the recessed area 132 includes a first wall 133, a second wall 134, and a first corner 135 located between the first wall 133 and the second wall 134; and the battery cell 2 includes a first main body part 21 and a second main body part 22, the second main body part 22 is arranged protruding away from the first main body part 21, and the second main body part 22 and the first main body part 21 form a second corner 20 arranged corresponding to the first corner 135, thereby forming a special-shaped battery structure, meeting the diversification requirement of the battery structure, such as the special-shaped battery formed can be adapted to the special-shaped battery compartment of an electronic device; and the shape of the battery cell 2 and the shell 1 is roughly adapted, so that the battery cell 2 can effectively utilize the space inside the shell 1, and the energy density of the battery cell 2 is improved.

[0074] By arranging the insulating support structure 3 between the shell 1 and the battery cell 2, at least part of the insulating support structure 3 is located between the first corner 135 of the shell 1 and the second corner 20 of the battery cell 2 and connected to the shell 1, so that from the perspective of the shell 1, the structural strength of at least the first corner 135 of the shell 1 is improved, so that when the battery is swollen due to high temperature, the two sides of the first corner 135 of the shell 1 are not easy to approach each other and are not easy to be pressed and wrinkled, that is, the deformation of the shell 1 is inhibited to a certain extent, the risk of the two sides of the first corner 135 of the shell 1 approaching each other and being severely deformed is reduced, and the situation that the shell 1 is severely deformed to cause the battery cell 2 to be deformed too much is avoided to a certain extent, so that the risk of damage to the battery cell 2, short circuit of the pole piece and the like is avoided, and the safety of the battery is improved; and from the perspective of the battery cell 2, the existence of the insulating support structure 3 at least plays a certain supporting role at the second corner 20 of the battery cell 2, when the two sides of the second corner 20 of the battery cell 2 have a tendency to approach each other and be deformed, due to the supporting role of the insulating support structure 3 at the second corner 20 of the battery cell 2, the deformation degree of the battery cell 2 is effectively inhibited, the risk of the battery cell 2 being deformed too much is reduced, and the safety of the battery is improved.

[0075] Referring to Figures 3 to 5 In some embodiments, the insulating support structure 3 includes an insulating support body, the insulating support body has a buffer hole 30, at least part of the insulating support body is located between the first corner 135 and the second corner 20 and connected to the shell 1.

[0076] By arranging the buffer holes 30 on the insulating support body, when the battery cell 2 and / or the shell 1 is deformed, the buffer holes 30 can absorb and disperse the energy, play a buffering and energy-absorbing role, so as to inhibit the deformation degree to a certain extent, and avoid the case that the battery cell 2 and the shell 1 are deformed too much.

[0077] That is, in this way, when the battery is high-temperature bulging, if the two sides of the first corner 135 of the shell 1 have a tendency to deform towards each other under the action of the gas, due to the structural strengthening effect and the buffering and energy-absorbing effect of the insulating support body, the tendency of the first corner 135 of the shell 1 to bend and deform is effectively inhibited, thereby reducing the risk of the shell 1 deforming too much. Moreover, when the two sides of the second corner 20 of the battery cell 2 have a tendency to deform towards each other, due to the support effect of the insulating support body at least on the second corner 20 of the battery cell 2, the deformation degree of the battery cell 2 is effectively inhibited, thereby avoiding the risk that the battery cell 2 is deformed too much and causes damage, short circuit and other risks of the battery cell 2.

[0078] Among them, the buffer hole 30 can be a round hole, an oval hole, a rhombus hole, etc., and the present embodiment does not make special limitation thereto. For example, the buffer hole 30 can be multiple, and the size, shape, etc. of the multiple buffer holes 30 can be the same or different.

[0079] Continuing to refer to Figure 4 and Figure 5 , in some embodiments, the insulating support body includes at least two insulating buffer layers 31 arranged in a stacking manner along the second direction.

[0080] Here, the second direction can be specifically in the direction from the second corner 20 of the battery cell 2 to the first corner 135 of the shell 1. It can also refer to the up-down direction of Figure 4 .

[0081] Referring to Figure 4 and Figure 5 , for example, the insulating support body can specifically include two insulating buffer layers 31. Of course, in other implementations, the insulating support body can also include three or more insulating buffer layers 31 arranged in a stacking manner.

[0082] By arranging the insulating buffer layer 31 to be at least two, each of the insulating buffer layers 31 has a buffer hole 30, which further improves the insulating support and buffering and energy-absorbing effect, thereby further inhibiting the deformation degree of the shell 1 and the battery cell 2, and further reducing the risk that the shell 1 and the battery cell 2 are deformed too much.

[0083] In some embodiments, at least part of the buffer holes 30 on one of the two adjacent insulating buffer layers 31 are arranged staggered with the buffer holes 30 on the other of the two adjacent insulating buffer layers 31.

[0084] For example, referring to Figure 4 As shown, the projections of the buffer holes 30 on the upper insulating buffer layer 31 on the lower insulating buffer layer 31 are arranged staggered with the buffer holes 30 on the lower insulating buffer layer 31.

[0085] Such arrangement can further improve the buffer energy absorption effect, and thus more effectively prevent the second corner 20 of the shell 1 and the battery cell 2 from being deformed too much.

[0086] Specifically, the material of the insulating support body needs to meet the requirements of insulation, high temperature resistance, and electrolyte corrosion resistance.

[0087] In some embodiments, the material of the insulating support body can be selected from at least one of rubber, polyethylene (PE), polypropylene (PP), and polyethylene terephthalate (PET).

[0088] Such arrangement can further ensure the good insulation, high temperature resistance, and electrolyte corrosion resistance of the insulating support body, improve the stability of the insulating support body, and thus ensure the support effect and structural strengthening effect of the insulating support body on the shell 1 and the battery cell 2, and improve the safety of the battery.

[0089] In a specific implementation, for example, the insulating support body can be formed by a three-dimensional printer.

[0090] For example, an adhesive member such as adhesive paper can be attached to the surface of the insulating support body, and the insulating support body can be connected to the battery cell 2 and the shell 1 through the adhesive member.

[0091] For example, referring to Figures 6 to 8 As shown, in some embodiments, the insulating support structure 3 includes insulating adhesive paper, and at least part of the insulating adhesive paper is attached between the first corner 135 and the second corner 20.

[0092] Specifically, the material of the insulating adhesive paper needs to meet the requirements of insulation, high temperature resistance, and electrolyte corrosion resistance.

[0093] In some embodiments, the insulating adhesive paper includes a base material layer and an adhesive layer arranged on the base material layer. For example, the base material layer can be a PET base material, and the adhesive layer can be a PP adhesive layer or a PE adhesive layer. For another example, the base material layer can be a PP base material, and the adhesive layer can be an acid-modified PP adhesive layer.

[0094] With reference back to Figures 6 to 8 As shown in FIG. 1, in some embodiments, the insulation support structure 3 can also include a solidifiable insulation glue filled between the shell 1 and the battery cell 2, at least part of the insulation glue being located between the first corner 135 and the second corner 20.

[0095] For example, the initial state of the solidifiable insulation glue can be a liquid glue, which is coated at a desired position, such as between the first corner 135 and the second corner 20, by means of, for example, dispensing, and then is solidified by means of heating, light irradiation, etc., to form a glue body in a solidified state.

[0096] Specifically, the material of the insulation glue needs to meet the requirements of insulation, high temperature resistance, and electrolyte corrosion resistance.

[0097] For example, the insulation glue can be a PET hot melt glue, a PP hot melt glue, etc.

[0098] With reference back to Figure 4 and Figure 7 As shown in FIG. 1, in some embodiments, the second corner 20 of the battery cell 2 specifically includes an arc segment 201, which protrudes in a direction away from the shell 1. At least part of the insulation support structure 3 is arranged on the arc segment 201.

[0099] By making the second corner 20 of the battery cell 2 include the arc segment 201, the stress at the second corner 20 can be reduced, thereby avoiding the occurrence of cracking, breaking, etc. due to stress concentration at the second corner 20. By arranging at least part of the insulation support structure 3 on the arc segment 201, the structural strength of the arc segment 201 is improved to a certain extent, and the arc segment 201 is supported to a certain extent, which can better suppress the deformation of the battery cell 2, thereby further reducing the risk of excessive deformation of the battery cell 2 due to the deformation of the shell 1.

[0100] In some embodiments, the insulation support structure 3 can specifically cover the entire arc segment 201. In this way, the support and structural strengthening effect of the insulation support structure 3 on the second corner 20 can be further improved, thereby further suppressing the deformation of the battery cell 2. Moreover, the structural strength of the first corner 135 of the shell 1 is further improved, and the deformation of the first corner 135 of the shell 1 towards each other is further suppressed.

[0101] In some embodiments, the second corner 20 of the battery cell 2 may further include: a first extension segment 202 and a second extension segment 203. The first extension segment 202 is formed as part of the outer wall of the second main body portion 22, and the second extension segment 203 is formed as part of the outer wall of the first main body portion 21. The extension lines of the first extension segment 202 and the second extension segment 203 intersect, and the arc-shaped segment 201 connects the first extension segment 202 and the second extension segment 203.

[0102] In one feasible implementation, the insulating support structure 3 can be extended to the first extension section 202. That is, the insulating support structure 3 is provided on both the arc-shaped section 201 and the first extension section 202, thereby increasing the coverage of the insulating support structure 3, further improving the support and reinforcement effect of the insulating support structure 3 on the cell 2 and the outer casing 1, and thus further effectively suppressing the deformation of the outer casing 1 and the cell 2, and improving battery safety.

[0103] In this case, the insulating support structure 3 can cover the entire first extension 202, thereby further increasing the coverage of the insulating support structure 3, further improving the support and reinforcement range of the insulating support structure 3, and further avoiding the risk of excessive deformation of the outer shell 1 and the battery cell 2.

[0104] In another feasible implementation, the insulating support structure 3 can be extended to the second extension section 203. That is, the insulating support structure 3 is provided on both the arc section 201 and the second extension section 203, thereby increasing the coverage of the insulating support structure 3, further improving the support and reinforcement effect of the insulating support structure 3 on the cell 2 and the outer casing 1, and thus further effectively suppressing the deformation of the outer casing 1 and the cell 2, and improving the safety of the battery.

[0105] In this case, the insulating support structure 3 can cover the entire second extension 203, thereby further increasing the coverage of the insulating support structure 3, further improving the support and reinforcement range of the insulating support structure 3, and further avoiding the risk of excessive deformation of the outer shell 1 and the battery cell 2.

[0106] In another feasible implementation, refer to Figure 4 and Figure 7 As shown, insulating support structures 3 can be provided on the arc segment 201, the first extension segment 202, and the second extension segment 203, thereby increasing the coverage of the insulating support structure 3, further improving the support and reinforcement range of the insulating support structure 3, and further avoiding the risk of excessive deformation of the outer shell 1 and the battery cell 2.

[0107] In a specific implementation, if the thickness of the insulating support structure 3 is too large, it will occupy a large space in the shell 1, thereby reducing the energy density per unit volume of the battery cell 2; but if the thickness of the insulating support structure 3 is too small, it will reduce the support and reinforcement effect of the insulating support structure 3 on the battery cell 2 and the shell 1.

[0108] Based on this, in some embodiments, in the second direction, the thickness h of the insulating support structure 3 is not greater than the thickness H of the shell wall of the shell 1 at least at the position corresponding to the insulating support structure 3.

[0109] Here, the second direction may be, for example, the up-down direction in Figure 4 and Figure 7 .

[0110] In some embodiments, in the second direction, the thickness h of the insulating support structure 3 is not less than 0.1 mm. For example, the thickness h may be, for example, 0.1 mm, 0.15 mm, 0.18 mm, 0.2 mm, 0.22 mm, 0.25 mm, 0.3 mm.

[0111] By setting the thickness h of the insulating support structure 3 as above, the effective support and reinforcement effect of the insulating support structure 3 on the battery cell 2 and the shell 1 is ensured, the risk of excessive deformation of the shell 1 and the battery cell 2 is effectively suppressed, and the energy density per unit volume of the battery cell 2 is also considered and ensured.

[0112] In some embodiments, in the third direction, the height b of the insulating support structure 3 is not less than the height B of the battery cell 2. Referring to Figure 1 , the height B of the battery cell 2 is the height dimension of the battery cell 2 in the up-down direction in Figure 1 . Referring to Figure 5 and Figure 8 , in the third direction, the height b of the insulating support structure 3 is the dimension of the insulating support structure 3 in the direction of the arrow shown in Figure 5 and Figure 8 .

[0113] Such a setting ensures the coverage area of the insulating support structure 3, further improves the support and reinforcement effect of the insulating support structure 3 on the battery cell 2 and the shell 1, and further suppresses the deformation of the battery cell 2 and the shell 1, thereby avoiding the risk of excessive deformation of the battery cell 2 and the shell 1.

[0114] In some embodiments, at least part of the insulating support structure 3 is shaped to match the shape of the second corner 20 of the battery cell 2, and at least part of the insulating support structure 3 is arranged to fit the second corner 20.

[0115] By arranging the at least partial insulating support structure 3 to be attached to the second corner 20, the support effect of the insulating support structure 3 on the second corner 20 of the battery cell can be further improved, and the structural strength of the second corner 20 is further improved, thereby further avoiding the risk of excessive deformation of the battery cell 2 and the shell 1.

[0116] For example, as shown in Figs. 1 and 2, the insulating support structure 3 is arranged to be attached to the second corner 20 of the battery cell 2. Figure 7 and Figure 8 For example, as shown in Figs. 1 and 2, the insulating support structure 3 is arranged to be attached to the second corner 20 of the battery cell 2.

[0117] For example, as shown in Figs. 1 and 2, the insulating support structure 3 is arranged to be attached to the second corner 20 of the battery cell 2.

[0118] In this document, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances. In addition, the terms "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of this application and simplify the description, and do not indicate or imply 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 a limitation on this application.

[0119] In this document, relational terms such as "first" and "second", and the like can be used solely to distinguish one entity or action from another entity or action, without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0120] The preferred embodiments of the present application have been described above with the preferred embodiments; however, all the changes and modifications that can be made without departing from the spirit and concept of the present application should be covered by the appended claims.

Claims

1. A battery, characterized by, The shell (1) comprises a first shell (11) and a second shell (12) arranged on the first shell (11), the first shell (11) and the second shell (12) jointly form a containing cavity, and the battery cell (2) is located in the containing cavity; the edge of the first shell (11) and the edge of the second shell (12) are connected. The shell (1) comprises a first side wall (13), the first side wall (13) comprises a main body area (131) and a recessed area (132) located on one side of the main body area (131) in a first direction, and the recessed area (132) is recessed relative to the main body area (131) in the direction of the battery cell (2); the recessed area (132) comprises a first wall (133), a second wall (134), and a first corner (135) arranged between the first wall (133) and the second wall (134). The battery cell (2) comprises a first main body part (21) and a second main body part (22), the second main body part (22) is arranged by part of the first main body part (21) protruding in a direction away from the first main body part (21); a second corner (20) is formed between the second main body part (22) and the first main body part (21), and the second corner (20) is arranged corresponding to the first corner (135). The shell (1) and the battery cell (2) are provided with an insulating support structure (3), at least part of the insulating support structure (3) is located between the first corner (135) and the second corner (20), and is connected with the shell (1). The insulating support structure (3) comprises an insulating support body, and the insulating support body is provided with a buffer hole (30); 2. The battery of claim 1, wherein, At least part of the insulating support body is located between the first corner (135) and the second corner (20), and is connected with the shell (1). The insulating support body comprises at least two insulating buffer layers (31) arranged in a second direction in a stacked manner, and each of the insulating buffer layers (31) is provided with the buffer hole (30); 3. The battery of claim 2, wherein, At least part of the buffer holes (30) on one of the two adjacent insulating buffer layers (31) are arranged staggered with the buffer holes (30) on the other insulating buffer layer (31) in projection; And / or, the material of the insulating support body is selected from at least one of rubber, polyethylene, polypropylene, and polyethylene terephthalate. The insulating support structure (3) comprises insulating adhesive paper, and at least part of the insulating adhesive paper is bonded between the first corner (135) and the second corner (20); 4. The battery of claim 1, wherein, Alternatively, the insulating support structure (3) comprises a solidifiable insulating adhesive filled between the shell (1) and the battery cell (2), and at least part of the insulating adhesive is located between the first corner (135) and the second corner (20). ​ 5. The battery according to any one of claims 1 to 4, characterized in that, The second corner (20) comprises an arc segment (201) which protrudes towards a direction away from the shell (1); At least part of the insulation support structure (3) is arranged on the arc segment (201).

6. The battery of claim 5, wherein, The insulation support structure (3) covers the entire arc segment (201).

7. The battery of claim 5, wherein, The second corner (20) further comprises a first extension segment (202) and a second extension segment (203); the first extension segment (202) is formed as part of the outer wall of the second main body part (22), the second extension segment (203) is formed as part of the outer wall of the first main body part (21), the extension line of the first extension segment (202) intersects with the extension line of the second extension segment (203), and the arc segment (201) is connected between the first extension segment (202) and the second extension segment (203); The insulation support structure (3) extends to the first extension segment (202), and / or the insulation support structure (3) extends to the second extension segment (203).

8. The battery of claim 7, wherein, The insulation support structure (3) covers the entire first extension segment (202), and / or the insulation support structure (3) covers the entire second extension segment (203).

9. The battery according to any one of claims 1 to 4, characterized in that, In the second direction, the thickness of the insulation support structure (3) is not greater than the thickness of the shell wall of the shell (1) at least at the position corresponding to the insulation support structure (3); And / or, in the second direction, the thickness of the insulation support structure (3) is not less than 0.1mm; And / or, in the third direction, the height of the insulation support structure (3) is not less than the height of the battery cell (2).

10. The battery according to any one of claims 1 to 4, characterized in that, The insulation support structure (3) is connected with the battery cell (2); And / or, the insulation support structure (3) is wrapped on the entire outer side of the battery cell (2); And / or, at least part of the insulation support structure (3) matches the shape of the second corner (20), and at least part of the insulation support structure (3) is arranged in close contact with the second corner (20); And / or, the second main body part (22) is perpendicular to the first main body part (21); And / or, the first wall (133) and the second wall (134) are perpendicular; And / or, the shell (1) is a steel shell; And / or, the edge of the first shell (11) is provided with a first flange (111) extending towards a direction away from the accommodation cavity, and the first flange (111) is arranged along the circumference of the first shell (11); The edge of the second shell (12) is provided with a second flange (121) extending towards a direction away from the accommodation cavity, and the second flange (121) is arranged along the circumference of the second shell (12), and the first flange (111) and the second flange (121) are correspondingly arranged and welded.

Images