Battery and battery module

Abstract

The utility model provides a battery and a battery module. The battery comprises a battery core package and a supporting sheet structure, wherein the battery core pack further comprises a battery core body and a shell, the supporting piece is an elastic supporting piece and is positioned between the battery core body and the shell, and a plurality of contact points are formed between the supporting piece and the battery core body and are arranged at intervals. According to the battery designed by the utility model, the battery core bag is fixed in the vibration or shaking process, and the problem that the battery core loses efficacy due to the fact that the current collecting row or the tab is pulled under stress in the vibration or shaking process of the battery core bag is solved.

Description

Technical Field

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

[0002] In the design process of currently commonly used batteries, the battery pole pieces will expand during the charging process, so a certain space will be reserved between the battery cell body and the battery shell to ensure that there is no compression between the battery cell body and the shell. During the discharge process of the battery, the internal core package pole piece will shrink, so that the gap between the battery cell body and the battery shell will increase. Since the use environment of various batteries is different, various batteries may be subjected to different degrees of vibration during use. At this time, if the gap between the battery cell body and the battery shell is too large, it will cause the battery collector or the pole ear to be pulled by the force, resulting in the failure of the battery cell. Therefore, it is urgent to design a device to solve the above problems. Utility Model Content

[0003] The embodiments of the present invention provide a battery and a battery module, which can solve the above-mentioned problems.

[0004] In a first aspect, an embodiment of the present utility model provides a battery, comprising:

[0005] A battery core pack, comprising a battery core body and a shell;

[0006] Support structure;

[0007] The support sheet structure is an elastic support sheet, which is located between the battery cell body and the shell. There are multiple contact points between the support sheet structure and the battery cell body, and the contact points are arranged at intervals.

[0008] In one embodiment, the housing includes a first sub-housing, a second sub-housing, and a third sub-housing connected to the first sub-housing and the second sub-housing;

[0009] Among them, the first subshell and the second subshell are located on both sides of the third subshell in the first direction, the gap between the first subshell and the battery cell body is the first gap, the gap between the second subshell and the battery cell body is the second gap, and the supporting structure is located in the first gap and / or the second gap.

[0010] In one embodiment, if the width of the first gap or the width of the second gap is greater than 1 mm, the thickness of the support structure is not less than 0.5 mm; if the width of the first gap or the width of the second gap is not greater than 1 mm, the thickness of the support structure is not less than 0.5 mm.

[0011] In one embodiment, if the width of the first gap or the width of the second gap is greater than 1 mm, the support structure is a single-layer structure and includes an elastic first support, the first support is located between the battery body and the shell, and the first support extends along the second direction.

[0012] In one embodiment, if the width of the first gap or the width of the second gap is not greater than 1 mm, the support structure is a double-layer structure, and the support structure includes a first support and a second support with elasticity, the first support is located between the battery cell body and the second support, the second support is arranged on the shell, and the first support and the second support both extend along the second direction.

[0013] In one embodiment, the first support plate and the second support plate are connected as one body.

[0014] In one embodiment, the first support sheet is not connected to the second support sheet.

[0015] In one embodiment, the second supporting piece is also elastic.

[0016] In one embodiment, the first support piece is W-shaped.

[0017] In one embodiment, the support structure includes a first end and a second end in a second direction perpendicular to the first direction;

[0018] A third gap is provided between the third sub-shell and the first end and the second end of the supporting structure, and a width of the third gap is greater than 0.

[0019] In a second aspect, an embodiment of the present invention provides a battery module, comprising the battery of any one of the first aspect.

[0020] The utility model provides a battery, by arranging an elastic support sheet between the battery cell body and the battery shell, the support sheet contacts the battery cell body, and there are multiple contact points between the support sheet and the battery cell body, and the multiple contact points are arranged at intervals, so that when the battery vibrates or shakes, the elastic support sheet can fix the battery cell body, thereby avoiding the problem of battery cell failure caused by force pulling on the collector bar or the pole ear. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a schematic diagram of an application scenario provided by an embodiment of the utility model;

[0023] Figure 2 This is a schematic diagram of a battery structure provided by an embodiment of the utility model;

[0024] Figure 3 This is a schematic diagram of a battery structure provided by an embodiment of the utility model;

[0025] Figure 4 This is a schematic diagram of a support structure provided by an embodiment of the utility model;

[0026] Figure 5 This is another schematic diagram of a battery structure provided by an embodiment of the utility model;

[0027] Figure 6 This is another schematic diagram of a support structure provided by an embodiment of the utility model.

[0028] Explanation of the reference numerals: 1000, battery core pack; 1010, battery cell body; 1020, shell; 1021, first sub-shell; 1022, second sub-shell; 1023, third sub-shell; 1030, gap; 1040, pole ear; 1050, collector bar; 1060, support structure; 1061, first support; 1062, second support; 1063, first end; 1064, second end. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model. In the utility model, unless otherwise stated, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0030] Please refer to Figure 1 , Figure 1A schematic diagram of an application scenario provided for an embodiment of the utility model, wherein the battery core pack 1000 includes a battery body 1010 and a shell 1020, and also includes a tab 1040, and there is a gap 1030 between the battery body 1010 and the shell 1020. Because the use environment of various batteries may be different, the battery may be subjected to different degrees of vibration or shaking, and because there is a gap 1030 between the battery body 1010 and the shell 1020, the tab 1040 or the collector (not shown in the figure) of the battery may fall off due to vibration or shaking, ultimately causing the problem of battery failure. It is understandable that the application scenarios listed above are only for a more comprehensive and vivid description of the utility model solution, and are by no means intended to limit the applicable scenarios of the utility model solution. In fact, the utility model solution has a wide range of applicability and can adapt to various different application scenarios.

[0031] In order to solve the above problems, the present application provides a battery. Figure 2 , Figure 2 A schematic diagram of a battery structure provided for an embodiment of the utility model. The battery includes: a battery core pack (not shown in the figure) and a support structure 1060. The battery core pack further includes: a battery cell body 1010 and a shell 1020. The battery cell body 1010 contains the energy storage element of the battery, and the shell 1020 is generally used to protect the battery cell body 1010 and provide structural support. Specifically, the support structure 1060 is an elastic support, and is located between the battery cell body 1010 and the shell 1020. Specifically, there is a gap 1030 between the battery cell body 1010 and the shell 1020, and the support structure 1060 is placed in the gap 1030, and the support is in contact with the battery cell body 1010, and there are multiple contact points, and the multiple contact points are arranged at intervals.

[0032] By arranging an elastic support sheet between the battery cell body 1010 and the shell 1020, during the battery charging process, the interval 1030 between the battery cell body 1010 and the shell 1020 is reduced due to the expansion of the pole piece (not shown in the figure), and the battery cell body 1010 presses down the support sheet to meet the accommodation space requirement of the battery cell body 1010; at the same time, during the battery discharging process, the interval between the battery cell body 1010 and the shell 1020 increases due to the contraction of the pole piece, and the support sheet rebounds to fix the battery cell body 1010 to ensure that the battery cell body 1010 is not suspended. Finally, the function of maintaining relative stability between the battery cell body 1010 and the shell 1020 during battery vibration or shaking is achieved, avoiding the problem of battery failure caused by the relative instability of the battery cell body 1010 and the shell 1020. It should be noted that the above-mentioned contact points are arranged at intervals. The distance between the multiple contact points is not limited in the embodiment of the present application. The distance between the same or different contact points can be set according to the specific situation, so that when the battery pack vibrates or shakes, the force can be distributed more evenly to prevent excessive pressure or wear on the battery pack. In addition, this spacing arrangement can also improve the stability of the battery pack and ensure the service life and safety of the battery.

[0033] In some embodiments, there is a gap 1030 between the battery cell body 1010 and the shell 1020, and when the width of the gap 1030 is greater than the first preset gap width, the thickness of the pre-set supporting structure 1060 is not less than the first preset thickness. Figure 2 The width of the gap 1030 described in the present application is Figure 2 The Y direction is the width of the gap between the battery cell body 1010 and the shell 1020, and the thickness of the support structure 1060 in the present application solution refers to the thickness of the material forming the first support 1061 and the second support 1062 of the support structure 1060.

[0034] For example, in one embodiment, the first preset gap width is 1 mm, and the first preset thickness is 0.5 mm. Then, when the gap 1030 between the battery cell body 1010 and the shell 1020 is greater than the first preset gap width (i.e., 1 mm), the thickness of the pre-set support sheet is greater than or equal to the first preset thickness (i.e., 0.5 mm). It should be noted that the above examples are only for the purpose of more clearly and comprehensively demonstrating the core ideas and methods of the present utility model, so as to better understand the implementation methods of the present utility model. It is by no means intended to limit the scope of the present utility model. Any obvious modification or equivalent substitution made without departing from the essence of the present utility model shall be deemed to be within the scope of protection of the present utility model.

[0035] In this embodiment, when the width of the gap 1030 is greater than the first preset gap width, the thickness of the pre-set support sheet is not less than the first preset thickness, thereby ensuring that the support sheet structure 1060 can withstand the pressure generated when the battery cell body 1010 is pressed down, thereby avoiding the problem of damage to the support sheet structure 1060 due to insufficient support sheet thickness. Through reasonable support sheet design, this solution can effectively protect the battery cell body 1010 and the support sheet structure 1060, and improve the stability and safety of the entire battery pack.

[0036] Further, in some embodiments, when the width of the gap 1030 between the battery cell body 1010 and the shell 1020 is greater than the first preset gap width, and the thickness of the support sheet is not less than the first preset thickness, please refer to Figure 3 and Figure 4 , in this case, the support structure 1060 includes a first support 1061 and a second support 1062 with elasticity, and the first support 1061 is connected to the second support 1062 and is located between the battery body 1010 and the second support 1062, and the second support 1062 is arranged on the housing 1020, and the first support 1061 and the second support 1062 both extend along the second direction. It should be noted that the first direction in all embodiments of the present application is Figure 2 The Y direction in the embodiment of the present application is the second direction in all embodiments of the present application. Figure 2 The X direction in .

[0037] In this embodiment, when the width of the gap 1030 between the battery cell body 1010 and the shell 1020 is greater than the first preset gap width, and the thickness of the support sheet is not less than the first preset thickness, the support sheet structure 1060 is configured to include a first support sheet 1061 and a second support sheet 1062 having elasticity, wherein the first support sheet 1061 can ensure that the battery maintains a relatively stable state between the battery cell body 1010 and the shell 1020 during the charging and discharging process, respectively, and the second support sheet 1062 can prevent the first support sheet 1061 from scratching the shell 1020 during the expansion and contraction process. Through the double-layer design of the first support sheet 1061 and the second support sheet 1062, when the width of the gap 1030 between the battery cell body 1010 and the shell 1020 is greater than the first preset gap width, the support sheet structure 1060 can still meet the requirement of stabilizing the stability between the battery cell body 1010 and the shell 1020.

[0038] Further, in some embodiments, when the width of the gap 1030 between the battery cell body 1010 and the shell 1020 is less than the first preset gap width, and the thickness of the support sheet is not less than the first preset thickness, please refer to Figure 5 and Figure 6At this time, the support structure 1060 includes an elastic first support 1061, and the first support 1061 is located in the gap 1030, and the first support 1061 extends along the second direction.

[0039] In some embodiments, the second support sheet 1062 is also elastic, which means that both the first support sheet 1061 and the second support sheet 1062 are elastic.

[0040] In some embodiments, there is a gap 1030 between the battery cell body 1010 and the shell 1020 , and when the width of the gap 1030 is not greater than the first preset gap width, the thickness of the pre-set support sheet is not less than the second preset thickness.

[0041] For example, in one embodiment, the first preset gap width is 1 mm, and the second preset thickness is 0.5 mm. When the gap 1030 between the battery cell body 1010 and the shell 1020 is not greater than the first preset gap width (i.e., 1 mm), the thickness of the pre-set support sheet is greater than or equal to the second preset thickness (i.e., 0.5 mm). It should be noted that the above examples are only for the purpose of more clearly and comprehensively demonstrating the core ideas and methods of the present utility model, so as to better understand the implementation methods of the present utility model. It is by no means intended to limit the scope of the present utility model. Any obvious modification or equivalent substitution made without departing from the essence of the present utility model shall be deemed to be within the scope of protection of the present utility model.

[0042] In this embodiment, when the width of the gap 1030 is not greater than the first preset gap width, the thickness of the support is pre-set to be not less than the first preset thickness, so that the thickness of the support is sufficient to withstand the pressure generated when the battery cell body 1010 is pressed down, thereby avoiding the problem of damage to the support structure 1060 due to insufficient support thickness.

[0043] Further, in some embodiments, when the width of the gap 1030 between the battery cell body 1010 and the shell 1020 is not greater than the first preset gap width, and the thickness of the support sheet is not less than the second preset thickness, please refer to Figure 3 , Figure 3 Another schematic diagram of a battery structure provided by an embodiment of the utility model. In this case, the support sheet structure 1060 includes an elastic first support sheet 1061. The first support sheet 1061 extends along the second direction, is located between the battery body 1010 and the shell 1020, and is connected to the battery body 1010 and the shell 1020 respectively.

[0044] In this embodiment, when the width of the gap 1030 between the battery cell body 1010 and the shell 1020 is not greater than the first preset gap width, and the thickness of the support sheet is not less than the second preset thickness, the support sheet structure 1060 is configured to include an elastic first support sheet 1061. On the one hand, the support sheet structure 1060 at this time can ensure that the battery maintains a relatively stable state between the battery cell body 1010 and the shell 1020 during the charging and discharging processes. On the other hand, the support sheet structure 1060 at this time can also save materials.

[0045] In some embodiments, the first support sheet 1061 is W-shaped, which can be referred to as Figure 2 as well as Figure 3 In this embodiment, by setting the first support sheet 1061 to be W-shaped, the support sheet structure 1060 can maintain a relatively stable state between the battery body 1010 and the shell 1020 during the battery charging or discharging process, while saving the materials required for manufacturing the support sheet structure 1060. It should be noted that the W-shape of the first support sheet 1061 is not a limitation of this solution, and the first support sheet 1061 can be set to other shapes according to specific circumstances, which is not limited here.

[0046] In some embodiments, reference may be made to Figure 3 , the shell 1020 includes a first subshell 1021, a second subshell 1022 and a third subshell 1023 connecting the first subshell 1021 and the second subshell 1022. Among them, the first subshell 1021 and the second subshell 1022 are located on both sides of the third subshell 1023 in the first direction, the gap between the first subshell 1021 and the battery cell body 1010 is the first gap (not shown in the figure), the gap between the second subshell 1022 and the battery cell body 1010 is the second gap, and the support structure 1060 is located in the first gap and / or the second gap. Specifically, the support structure 1060 can be arranged in the first gap or the second gap, or can be arranged in the first gap and the second gap at the same time. All embodiments in the present application are to better describe the present application scheme by giving an example that the support structure 1060 is arranged in the second gap, that is, in the embodiments in the present application scheme, the gap 1030 refers to the second gap.

[0047] In some embodiments, if the width of the first gap or the width of the second gap is greater than 1 mm, the thickness of the support structure 1060 is not less than 0.5 mm; if the width of the first gap or the width of the second gap is not greater than 1 mm, the thickness of the support structure 1060 is not less than 0.5 mm.

[0048] Further, if the width of the first gap or the width of the second gap is greater than 1 mm, the support sheet structure 1060 is a single-layer structure and includes a first support sheet 1061 with elasticity, the first support sheet 1061 is located between the battery cell body 1010 and the shell 1020, and the first support sheet 1061 extends along the second direction; if the width of the first gap or the width of the second gap is not greater than 1 mm, the support sheet structure 1060 is a double-layer structure, and the support sheet structure 1060 includes a first support sheet 1061 and a second support sheet 1062 with elasticity, the first support sheet 1061 is located between the battery cell body 1010 and the second support sheet 1062, the second support sheet 1062 is arranged on the shell 1020, and the first support sheet 1061 and the second support sheet 1062 both extend along the second direction. By respectively arranging different support sheet structures according to the width of the first gap or the width of the second gap, it is possible to prevent the support sheet structure from being insufficient to support the battery cell body and being damaged due to the use of the same support sheet structure due to different gap widths.

[0049] In some embodiments, the first support sheet 1061 and the second support sheet 1062 may be connected, that is, the first support sheet 1061 and the second support sheet 1062 are integrated. In other cases, the first support sheet 1061 and the second support sheet 1062 may not be connected, and the two are in contact but not integrated.

[0050] In some embodiments, the support structure 1060 includes a first end 1063 and a second end 1064 in a second direction perpendicular to the first direction, and a third gap is provided between the third sub-shell 1023 and the first end 1063 and the second end 1064 of the support structure 1060, and the width of the third gap is greater than 0. Figure 2 and Figure 3 Specifically, the first end 1063 of the support structure 1060 does not contact the inner wall of the housing 1020 in the second direction, and the second end 1064 of the support structure 1060 does not contact the inner wall of the housing 1020 in the second direction. The distance from the first end 1063 to the housing 1020 in the second direction is defined as a first distance, and the distance from the second end 1064 to the housing 1020 in the second direction is defined as a second distance, wherein the lengths of the first distance and the second distance are both greater than 0.

[0051] In this embodiment, the distance between the first end 1063 and the second end 1064 of the support structure 1060 and the inner wall of the shell 1020 in the second direction is set to be greater than 0, which means that the first end 1063 and the second end 1064 of the support structure 1060 do not contact the inner wall of the shell 1020 in the second direction, so that when the battery cell body 1010 presses down the support structure 1060 during charging of the battery, the support structure 1060 is compressed and elongated in the second direction without damaging the structure of the shell 1020.

[0052] An embodiment of the utility model provides a battery, by arranging an elastic support sheet between the battery cell body 1010 and the battery shell 1020, the support sheet contacts the battery cell body 1010, and there are multiple contact points between the support sheet and the battery cell body 1010, and the multiple contact points are arranged at intervals, so that when the battery vibrates or shakes, the elastic support sheet can fix the battery cell body 1010, thereby solving the problem of the battery collector 1050 or the pole ear 1040 being pulled due to force due to not being fixed, which eventually leads to battery failure.

[0053] The embodiment of the utility model further provides a battery module, comprising the above-mentioned battery. The battery module has all the advantages of the above-mentioned battery, which will not be described in detail here.

[0054] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for technicians in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A battery, characterized in that: include: A battery core pack, comprising a battery core body and a shell; Support structure; Wherein, the support sheet structure is an elastic support sheet, the support sheet structure is located between the battery cell body and the shell, there are multiple contact points between the support sheet structure and the battery cell body, and the contact points are arranged at intervals; Wherein, the shell includes a first subshell, a second subshell and a third subshell connecting the first subshell and the second subshell, the first subshell and the second subshell are located on both sides of the third subshell in the first direction, the gap between the first subshell and the battery cell body is a first gap, the gap between the second subshell and the battery cell body is a second gap, and the support structure is located in the first gap and / or the second gap; Among them, the width of the first gap or the width of the second gap is not greater than 1 mm, the support structure is a double-layer structure, and the support structure includes a first support and a second support with elasticity, the first support is located between the battery cell body and the second support, the second support is arranged on the shell, and the first support and the second support both extend along the second direction.

2. The battery according to claim 1, characterized in that If the width of the first gap or the width of the second gap is greater than 1 mm, the thickness of the support structure is not less than 0.5 mm; if the width of the first gap or the width of the second gap is not greater than 1 mm, the thickness of the support structure is not less than 0.5 mm.

3. The battery according to claim 2, characterized in that If the width of the first gap or the width of the second gap is greater than 1 mm, the support structure is a single-layer structure and includes an elastic first support, the first support is located between the battery cell body and the shell, and the first support extends along the second direction.

4. The battery according to claim 1, characterized in that The first supporting piece and the second supporting piece are connected as one body.

5. The battery according to claim 1, characterized in that The first supporting piece is not connected to the second supporting piece.

6. The battery according to claim 1, characterized in that The second supporting piece is also elastic.

7. The battery according to any one of claims 1 to 5, characterized in that: The first supporting piece is W-shaped.

8. The battery according to claim 1, characterized in that The support structure includes a first end and a second end in a second direction perpendicular to the first direction; A third gap is provided between the third sub-shell and the first end and the second end of the support structure, and a width of the third gap is greater than 0.

9. A battery module, characterized in that: The invention comprises several batteries as described in any one of claims 1 to 8.

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