Battery

Abstract

The utility model discloses a battery. The battery comprises a battery shell, a battery cell, a pole and a supporting structure, a pole is arranged on the battery shell, a battery cell is arranged in the battery shell, the battery cell is connected with the pole, and arc-shaped parts are symmetrically arranged on the two sides of the battery cell; the supporting structure comprises a supporting bottom plate and a bracket; the supporting bottom plate is arranged on the inner wall of one side, far away from the pole, of the battery shell; the supports are connected with the supporting bottom plate, the supports are oppositely arranged on the two sides of the supporting bottom plate, and a mounting space is defined by the supports and the supporting bottom plate; an arc-shaped groove is formed in the side, close to the arc-shaped part, of the support, the battery cell is placed in the installation space, and the support has the working state that the arc-shaped part is clamped in the arc-shaped groove so as to support the battery cell. According to the structure, the battery cell can be fixed, and interference between the battery cell and the shell due to the gravity effect when the battery cell is laterally placed for use is avoided; barren liquor caused by horizontal placement to the roll core is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of battery core support, in particular to a battery. Background Art

[0002] Secondary batteries have the advantages of stable voltage, safety and reliability, low price, and abundant raw materials. They mainly include lithium-ion batteries, sodium-ion batteries, lithium-sulfur batteries, etc., and are widely used in consumer electronics, energy storage, and power. The square battery cells with aluminum shells or other metal shells that are currently commonly used are mostly used in a vertical position. If they are used flat or sideways, the battery cells will become depleted in liquid or structural interference in the later stages of use, causing cycle failure and making them unusable. However, the inability to use secondary batteries flat or sideways limits the flexibility of battery design, increases the cost of battery design to a certain extent, and reduces the market competitiveness of batteries.

[0003] The square battery cells with aluminum shells or other metal shells currently in use are generally composed of bare cells, cover plates, electrolytes, external aluminum shells and other components; bare cells are generally composed of one or more wound or stacked bare cells, whose pole ears are welded to the connecting plates and then connected to the positive and negative poles on the cover plates, the welded bare cells are combined with the empty aluminum shells, and the electrolyte is then injected into the shell through the injection holes on the cover plates to finally form the finished battery cells; battery cells are generally welded to their external positive and negative poles through separate metal connecting plates or the bars on the CCS, and then connected to the corresponding equipment to achieve their charge and discharge cycles; when the battery cells are used on their side, the bare cells inside the battery cells will tilt due to gravity, and the expansion during the cycle will interfere with the aluminum shell, lithium deposition will form in the interfering parts, and performance degradation will be aggravated; in severe cases, the aluminum foil and copper foil may also break, and the broken copper and aluminum foil may come into contact with other parts, causing safety risks. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is that when the battery cell is placed on its side for use, the bare battery cell inside the battery cell will tilt due to the effect of gravity, and the expansion during the cycle will interfere with the aluminum shell, lithium deposition will occur at the interfering position, and performance degradation will be aggravated; in severe cases, the aluminum foil and copper foil will break, and the broken copper and aluminum foil will come into contact with other parts, causing safety risks.

[0005] To this end, the utility model provides a battery, comprising:

[0006] A battery housing, wherein a pole is disposed on the battery housing, a battery cell is installed in the battery housing, the battery cell is connected to the pole, and arc portions are symmetrically disposed on both sides of the battery cell;

[0007] A support structure, the support structure comprising a support base plate and a bracket, the support base plate being arranged on an inner wall of the battery housing away from the pole; the bracket being connected to the support base plate, and the bracket being arranged on both sides of the support base plate opposite to each other, and the bracket and the support base plate enclosing an installation space;

[0008] Among them, an arc-shaped groove is opened on one side of the bracket close to the arc-shaped portion, the battery cell is placed in the installation space, and the bracket has the function of clamping the arc-shaped portion in the arc-shaped groove to support the working state of the battery cell.

[0009] Optionally, the supporting bottom plate has a first end, a second end and a middle section, the middle section is arranged on the battery casing parallel to the bottom surface of the battery cell, and the first end and the second end are arranged at an angle.

[0010] Optionally, the supporting bottom plate comprises a first supporting sheet and a second supporting sheet, and the second supporting sheet is arranged on a side of the first supporting sheet close to the battery cell.

[0011] Optionally, the first supporting sheet comprises a first connecting portion, which is arranged on an inner wall of the battery housing away from the pole, and both sides of the first connecting portion are connected with first bending portions inclined toward the battery cell.

[0012] Optionally, an adhesive layer is provided on a side of the first connecting portion away from the battery core, and the adhesive layer is used to adhere the first connecting portion to the battery housing.

[0013] Optionally, the second supporting sheet comprises a second connecting portion, which is arranged on a side of the first connecting portion close to the battery cell; both sides of the second connecting portion are connected with second bending portions inclined toward the battery cell;

[0014] Wherein, the second bending portion is arranged on a side of the corresponding first bending portion close to the battery core.

[0015] Optionally, two of the above-mentioned brackets are provided, and the two brackets are relatively and closely arranged on a side of the corresponding second bending portion close to the battery core.

[0016] Optionally, the battery is further provided with a hole structure, the hole structure comprising a first through hole and a second through hole, the first through hole is provided on the first support sheet, and the second through hole is provided on the second support sheet and the bracket; the diameter of the first through hole is D1; ​​the diameter of the second through hole is D2; the width of the first support sheet is equal to the width of the second support sheet, which is W0;

[0017] Among them, 0.5cm≤D1 <W0;1nm<D2<0.5mm。

[0018] Optionally, the thickness of the battery cell is T;

[0019] Among them, W0=T.

[0020] Optionally, the width of the above-mentioned bracket is W1; the inner diameter of the opening end of the arc-shaped groove is L1;

[0021] Among them, W1=W0=L1=T.

[0022] The technical solution provided by the utility model has the following advantages:

[0023] 1. The utility model provides a battery, including a battery shell, a battery cell, a pole and a support structure; the battery shell is a hollow shell, two poles are fixed on the bottom surface of the battery shell, the battery cell is installed on the side of the battery shell close to the pole, and the battery cell is connected to the two poles. Specifically, a plurality of battery cells are arranged inside the battery shell, and a plurality of battery cells form a battery cell group, and arc portions are arranged on both sides of each battery cell; the support structure includes a support bottom plate and a bracket, the support bottom plate is fixed on the lower inner wall of the battery shell, two brackets are arranged, and the two brackets are symmetrically arranged on both sides of the support bottom plate, and the opposite surfaces of the two brackets and the top surface of the support bottom plate jointly enclose an installation space, and an arc groove is provided on the side of the bracket close to the arc portion, and the side of the battery cell away from the pole is clamped in the installation space, and the inner sides of the two oppositely arranged brackets are fitted on the side wall of the battery cell, and the arc portion is clamped in the arc groove for supporting the battery cell. A hole structure is provided on the support bottom plate and the bracket. When the two poles are above the battery shell, the battery is in an upright position; when the side of the battery shell with a larger area is placed on the ground; the battery is in a flat position; when the side of the battery shell with a smaller area is placed on the ground, the battery is in a side position.

[0024] Compared with the conventional secondary battery design, the invention adds a supporting structure at the bottom of the battery cell. When the entire battery is placed on its side, the bracket fixes the battery cell by clamping the arc portion in the arc groove, so as to avoid interference between the battery cell and the outer shell due to gravity when the battery cell is placed on its side for use. At the same time, the bracket and the supporting bottom plate both have a hole structure, which will not block the contact between the battery cell and the electrolyte, and can use the hole structure to adsorb the electrolyte. In the later stage of the battery cell cycle, the hole structure can be used to adsorb the electrolyte below to the upper winding core position, thereby providing electrolyte for the upper winding core to use, avoiding the winding core from being starved of liquid when placed flat. Furthermore, the bracket bottom sheet is an insulating material, which can avoid direct contact between the bare battery cell and the bottom shell, thereby replacing the original bottom insulating sheet and increasing the flexibility of the battery cell design. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the overall structure of the battery provided in the utility model;

[0027] Figure 2 This is a front view of the internal structure of the battery provided in the utility model when it is in a vertical state;

[0028] Figure 3 A side view of the internal structure of the battery provided in the utility model when it is in a vertical position;

[0029] Figure 4 This is a schematic diagram of the overall structure of the support structure provided in the utility model;

[0030] Figure 5 This is a front view of the internal structure of the battery provided in the utility model when it is in a side-laying state;

[0031] Figure 6 It is a structural schematic diagram of the bracket provided in the utility model when it is in a tilted state;

[0032] Figure 7 It is a structural schematic diagram of the first through hole provided in the utility model;

[0033] Figure 8 It is a structural schematic diagram of the second through hole provided in the utility model;

[0034] Fig. 9 This is a schematic diagram of the dimensions of the battery cell, bracket and supporting base provided in the utility model;

[0035] Description of reference numerals:

[0036] 1-battery housing; 11-electrode column; 12-battery cell;

[0037] 2-support structure; 21-bracket; 22-arc groove; 23-support bottom plate; 24-first support sheet; 241-first connecting portion; 242-first bending portion; 25-second support sheet; 251-second connecting portion; 252-second bending portion;

[0038] 31 - first through hole; 32 - second through hole. DETAILED DESCRIPTION

[0039] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0043] Example

[0044] like Figures 1 to 8 As shown, this embodiment provides a battery, including a battery housing 1, a battery cell 12, a pole 11 and a support structure 2; the battery housing 1 is a hollow housing, two poles 11 are fixed to the bottom surface of the battery housing 1, the battery cell 12 is installed on the side of the battery housing 1 close to the pole 11, and the battery cell 12 is connected to the two poles 11. Specifically, a plurality of battery cells 12 are arranged inside the battery housing 1, and the plurality of battery cells 12 form a battery cell group, and as shown in FIG. Figure 1In the figure, arc-shaped portions are arranged on both sides of each battery cell 12; the support structure 2 includes a support base plate 23 and a bracket 21. The support base plate 23 is fixedly attached to the lower inner wall of the battery housing 1. Two brackets 21 are arranged, and the two brackets 21 are symmetrically arranged on both sides of the support base plate 23. The opposite surfaces of the two brackets 21 and the top surface of the support base plate 23 together enclose an installation space. An arc-shaped groove is provided on the side of the bracket close to the arc-shaped portion. The side of the battery cell 12 away from the pole 11 is stuck in the installation space. The inner sides of the two oppositely arranged brackets 21 are attached to the side wall of the battery cell 12, and the arc-shaped portion is stuck in the arc-shaped groove to support the battery cell 12. A hole structure is provided on the support base plate 23 and the bracket 21. When the two poles 11 are above the battery housing 1, the battery is in an upright state; when the side of the battery housing 1 with a larger area is placed on the ground; the battery is in a flat state. When the side of the battery housing 1 with a smaller area is placed on the ground, as shown in FIG. Figure 5 As shown, the battery is placed sideways.

[0045] Compared with the conventional secondary battery design, the invention adds a support structure 2 at the bottom of the battery cell 12. When the entire battery is placed on its side, the bracket 21 fixes the battery cell 12 by clamping the arc portion in the arc groove, so as to prevent the battery cell 12 from interfering with the outer shell due to gravity when it is placed on its side for use; at the same time, the bracket 21 and the supporting bottom plate 23 both have a hole structure, which will not block the contact between the battery cell 12 and the electrolyte, and can use the hole structure to adsorb the electrolyte. In the later stage of the cycle of the battery cell 12, the hole structure can be used to adsorb the electrolyte below to the upper winding core position, thereby providing electrolyte for the upper winding core to use, avoiding the winding core from being starved of liquid due to flat placement; furthermore, the bottom film of the bracket 21 is an insulating material, which can avoid direct contact between the bare battery cell 12 and the bottom shell, and play the role of replacing the original bottom insulating film, thereby increasing the flexibility of the design of the battery cell 12.

[0046] like Figures 1 to 6 As shown, specifically, the support base plate 23 includes a first end, a second end and a middle section; Figure 4As shown, the first end is the bent portion on the left side of the support bottom plate 23, the second end is the bent portion on the right side of the support bottom plate 23, and the middle section is the straight strip portion in the middle of the support bottom plate 23. The middle section is parallel to the bottom surface of the battery cell and is fitted on the battery case. Specifically, the support bottom plate 23 is divided into a first support sheet 24 and a second support sheet 25. The second support sheet 25 is fitted with the first support sheet 24, and the second support sheet 25 is located on the side of the first support sheet 24 close to the battery cell 12; the first support sheet 24 includes a first connecting portion 241 and a first bent portion 242; the first connecting portion 241 is in the shape of a long strip, and the first connecting portion 241 is laid flat on the inner wall of the battery case 1 along the bottom surface of the battery cell 12 away from the pole 11, and an adhesive layer is provided on the side of the first connecting portion 241 away from the pole 11. It can be glue, adhesive tape or other sticky substances; there are two first bending portions 242, and the two first bending portions 242 are symmetrically arranged on both sides of the first connecting portion 241. The first bending portion 242 and the first connecting portion 241 are integrally formed. There are two ways to set the first bending portion 242. First, the first bending portion 242 can be curved toward the pole 11 and toward the battery cell 12. Second, the first bending portion 242 is also a straight strip, and the first bending portion 242 and the first connecting portion 241 are inclined at an angle toward the battery cell 12. In the present embodiment, it is preferably arranged in a curved shape.

[0047] like Figures 1 to 6 As shown, the second support sheet 25 includes a second connection portion 251 and a second bending portion 252. The second connection portion 251 is also in the shape of a long strip. The second connection portion 251 is attached to the side of the first connection portion 241 close to the pole 11 by gluing or hot melting. There are two second bending portions 252. The two second bending portions 252 are symmetrically arranged at both ends of the second connection portion 251. The two second bending portions 252 are attached to the side of the corresponding first bending portion 242 close to the battery cell 12. The shape of the second bending portion 252 follows the shape of the first bending portion 242. There are also two brackets 21, and the two brackets 21 are also relatively attached to the side of the corresponding second bending portion 252 close to the battery cell 12. This arrangement can ensure that the first bending portion 242 and the second bending portion 252 support the bracket 21.

[0048] Among them, Fig. 9 As shown, the width of the first support sheet 24 is equal to the width of the second support sheet 25, which is W0; the thickness of the battery cell 12 is T; wherein W0 = T. The width of the first support sheet 24 is equal to the width of the second support sheet 25 is equal to the thickness of the battery cell 12, which ensures that the side of the battery cell 12 is in full contact with the electrolyte while ensuring the support and fixing effect of the side of the battery cell 12 away from the pole 11.

[0049] like Figures 1 to 6As shown, the first support piece 24 and the second support piece 25 have a certain hardness and can play a supporting role. An arc-shaped groove 22 is provided on one side of the bracket 21 close to the battery cell 12, so that the whole bracket 21 presents a U shape. The side of the bracket 21 away from the battery cell 12 can be fitted and arranged on the inner side of the second bent portion 252; the end of the opening position of the arc-shaped groove 22 is connected to the battery cell 12 to be suitable for supporting the battery cell 12. From the side view, as Fig. 9 shown, an arc-shaped groove is also provided above the bracket 21 to support the bracket 21 by using the arc-shaped supporting effect. The width of the bracket 21 is W1; the inner diameter of the opening end of the arc-shaped groove 22 is L1; wherein, W1 = W0 = L1 = T.

[0050] In other implementable ways, as Figure 6 shown, the overlapping part of the bracket 21 and the bottom film can be set at a certain inclination angle as a whole, so as to increase the supporting coverage area of the bracket 21 for the battery cell 12, and can well fix the bare battery cell 12, avoiding interference between the battery cell 12 and the battery case 1 due to the influence of gravity when the battery cell is placed sideways, and the inclination angles of the two oppositely arranged brackets 21 are the same, so that the force on the battery cell 12 is balanced and the situation of lack of support is avoided. And the inner diameter of the opening end of the arc-shaped groove 22 is equal to the width of the first support piece 24, the width of the second support piece 25 and the thickness of the battery cell 12, ensuring that both ends of the bracket 21 support at the edge positions of both sides of the battery cell 12, further ensuring its supporting coverage area and improving the supporting stability.

[0051] As Figure 7 and Figure 8 shown, in this embodiment, the first support piece 24 and the second support piece 25 are made of a material with holes. The hole structure includes a first through hole 31 and a second through hole 32. The diameter of the first through hole 31 is larger than that of the second through hole 32. The second through hole 32 is opened on the first support piece 24, and the second through hole 32 is opened on the second support piece 25 and the bracket 21; specifically, the diameter of the first through hole 31 is D1; the diameter of the second through hole 32 is D2; the width of the first support piece 24 is equal to the width of the second support piece 25, which is W0; wherein, 0.5 cm ≤ D1 < W0; 1 nm < D2 < 0.5 mm. Through the above settings, the large first through hole 31 on the first support piece 24 ensures the full infiltration of the electrolyte, and then drives the electrolyte below to move upward. And the smaller second through holes 32 on the second support piece 25 and the bracket 21 have a better adsorption effect on the electrolyte, so that the electrolyte can be fully adsorbed and contact with the battery cell 12. In the later stage of the cycle of the battery cell 12, the electrolyte can still be provided for the upper wound core to use, avoiding the lack of electrolyte caused by placing the bare battery cell 12 flat or sideways.

[0052] In other implementable ways, as Figure 6As shown, the hole structure is combined with the bracket 21 disposed above and is arranged in an inclined manner, which can further increase the degree of infiltration of the electrolyte and the battery cell 12.

[0053] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A battery, characterized in that: include: A battery housing (1), wherein a pole (11) is provided on the battery housing (1), a battery cell (12) is installed in the battery housing (1), the battery cell (12) is connected to the pole (11), and arc portions are symmetrically provided on both sides of the battery cell (12); A support structure (2), the support structure (2) comprising a support base plate (23) and a bracket (21), the support base plate (23) being arranged on an inner wall of a side of the battery housing (1) away from the pole (11); the bracket (21) being connected to the support base plate (23), and the bracket (21) being arranged on two sides of the support base plate (23) opposite to each other, and the bracket (21) and the support base plate (23) enclosing an installation space; The bracket (21) is provided with an arc-shaped groove (22) on one side close to the arc-shaped portion, the battery cell (12) is placed in the installation space, and the bracket (21) has a working state of clamping the arc-shaped portion in the arc-shaped groove (22) to support the battery cell (12).

2. The battery according to claim 1, characterized in that The supporting bottom plate (23) has a first end, a second end and a middle section, the middle section is arranged parallel to the bottom surface of the battery cell (12) and is fitted on the battery housing (1), and the first end and the second end are arranged at an angle.

3. The battery according to claim 2, characterized in that The supporting bottom plate (23) comprises a first supporting sheet (24) and a second supporting sheet (25), wherein the second supporting sheet (25) is arranged in close contact with a side of the first supporting sheet (24) close to the battery core (12).

4. The battery according to claim 3, characterized in that The first supporting sheet (24) comprises a first connecting portion (241), the first connecting portion (241) being arranged on an inner wall of a side of the battery housing (1) away from the pole (11), and both sides of the first connecting portion (241) being connected to first bent portions (242) inclined towards the battery cell (12).

5. The battery according to claim 4, characterized in that An adhesive layer is provided on a side of the first connecting portion (241) away from the battery core (12), and the adhesive layer is used to adhere the first connecting portion (241) to the battery housing (1).

6. The battery according to claim 4, characterized in that The second supporting sheet (25) comprises a second connecting portion (251), the second connecting portion (251) being arranged in close contact with a side of the first connecting portion (241) close to the battery cell (12); both sides of the second connecting portion (251) are connected to second bent portions (252) inclined towards the battery cell (12); Wherein, the second bent portion (252) is arranged in close contact with a side of the corresponding first bent portion (242) close to the battery cell (12).

7. The battery according to claim 6, characterized in that Two brackets (21) are provided, and the two brackets (21) are relatively and closely arranged on a side of the corresponding second bending portion (252) close to the battery core (12).

8. The battery according to any one of claims 3 to 7, characterized in that: The battery is also provided with a hole structure, the hole structure comprising a first through hole (31) and a second through hole (32), the first through hole (31) being provided on the first supporting sheet (24), and the second through hole (32) being provided on the second supporting sheet (25) and the bracket (21); the diameter of the first through hole (31) is D1; ​​the diameter of the second through hole (32) is D2; the width of the first supporting sheet (24) is equal to the width of the second supporting sheet (25), which is W0; Among them, 0.5cm≤D1 <W0;1nm<D2<0.5mm。 9. The battery according to claim 8, characterized in that The thickness of the battery core (12) is T; Among them, W0=T.

10. The battery according to claim 9, characterized in that The width of the bracket (21) is W1; the inner diameter of the opening end of the arc-shaped groove (22) is L1; Among them, W1=W0=L1=T.

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