Battery cover plate assembly and single battery and battery pack comprising same
By designing a snap connection between the accommodating groove and the raised structure in the battery cover assembly, the problem of the cover structure taking up a large space in the thickness direction is solved, and the high energy density and stable connection of the battery are achieved.
Patent Information
- Application Number
- CN202422704645.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-06
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-11-06
AI Technical Summary
The cover structure of the existing square battery occupies a large space in the thickness direction, affecting the volume energy density of the battery.
A battery cover assembly is designed, including a cover plate, a first plastic part and a second plastic part. The outer side of the cover plate is provided with a receiving groove. The first plastic part is embedded in the receiving groove. The projecting structure of the second plastic part is arranged through the avoidance port of the cover plate, and is fixedly connected through the tab and the slot. The pole ear is arranged through the receiving groove to reduce the overall thickness to improve the space utilization rate.
By optimizing the cover structure, the volume energy density of the battery is increased, the space utilization is improved, the fixed connection is stronger and easy to assembly.
Smart Images
Figure CN223273380U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of batteries, and specifically proposes a battery cover assembly and a single battery and a battery pack comprising the same. Background Art
[0002] In related technologies, square batteries generally refer to batteries with square steel or aluminum shells. They have high energy density and long cycle life, and therefore have been widely used in many fields.
[0003] Specifically, the cover plate is a crucial component in prismatic batteries. It seals the opening of the battery casing and protects the battery's internal winding core. Furthermore, the cover plate is insulated with upper and lower plastic layers, respectively, to prevent short circuits and battery failure.
[0004] However, the upper plastic layer is located on the outside of the cover plate, and the lower plastic layer is located on the inside of the cover plate, and both have a certain thickness. This makes the upper plastic layer, the cover plate and the lower plastic layer occupy a large space in the thickness direction, which is not conducive to improving the volume energy density of the battery. Utility Model Content
[0005] The purpose of this application is to solve at least some of the technical problems mentioned above, and this purpose is achieved through the following technical solutions:
[0006] In the first aspect, the present application proposes a battery cover assembly, which includes a cover, a first plastic part and a second plastic part. The outer side surface of the cover is provided with a receiving groove, a first avoidance opening is opened in the receiving groove, the first plastic part is provided with a second avoidance opening, the first plastic part is embedded in the receiving groove, and the second avoidance opening is aligned with the first avoidance opening; the second plastic part is attached to the inner side surface of the cover, the second plastic part is provided with a protruding structure, the protruding structure is sequentially penetrated by the first avoidance opening, and a tab avoidance opening is opened in the middle of the protruding structure, and the tab avoidance opening is aligned with the second avoidance opening.
[0007] In some embodiments, a latch is provided at the position of one of the tab avoidance opening and the second avoidance opening, and a latch slot is provided at the other one, and the latch is engaged with the latch slot.
[0008] In some embodiments, a dimension of the contact portion between the latch tongue and the latch slot in the X direction is a, and 0.1 mm≤a≤1 mm.
[0009] In some embodiments, a latch tongue is provided at the tab avoidance opening, and a slot is provided at the second avoidance opening, and the latch tongue is no higher than the top of the first plastic part in the Z direction.
[0010] In some embodiments, the latch tongue is a single-piece structure, and the slot is a single slot matching the latch tongue.
[0011] In some embodiments, the latch tongue is a set of double-body structures, and the latch groove is a double groove matching the latch tongue.
[0012] In some embodiments, the two tabs in a group are arranged opposite to each other.
[0013] In some embodiments, the two tabs in a set are disposed opposite each other.
[0014] In a second aspect, the present application provides a single battery, which includes the battery cover assembly of the first aspect.
[0015] In a third aspect, the present application proposes a battery pack comprising the single cell according to the second aspect.
[0016] The technical solution proposed in this application has at least the following technical effects:
[0017] In the present application, a receiving groove is provided on the outer side of the cover plate, and the first plastic part is embedded in the receiving groove to reduce the overall thickness and improve space utilization. In addition, the raised structure of the second plastic part passes through the first avoidance opening of the cover plate, and the tab avoidance opening in the middle of the raised structure is used to pass the tab. The tab avoidance opening is aligned with the second avoidance opening, so that the tab and the pole can be connected in the receiving groove, further improving space utilization and thereby increasing the volume energy density of the battery. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to better integrate the contents shown in the drawings with the contents described in the specific embodiments, a brief introduction to the drawings is given below. It is understood that the drawings mentioned below are only schematic illustrations of the relevant technical solutions and some embodiments of the technical solutions of this application. Without making any creative efforts, those skilled in the art can also create drawings showing other embodiments.
[0019] Specifically, the annotations to the drawings of the specification are as follows:
[0020] Figure 1 This is an exploded schematic diagram of a battery cover assembly according to some embodiments of the present application;
[0021] Figure 2 for Figure 1 A magnified schematic diagram of point A in the middle;
[0022] Figure 3 for Figure 1 A magnified schematic diagram of point B in the middle;
[0023] Figure 4 This is a schematic structural diagram of the first plastic part described in some embodiments of this application;
[0024] Figure 5 This is a schematic diagram of the connection between the tongue and the slot described in some embodiments of the present application;
[0025] Figure 6 This is a schematic structural diagram of the first type of latch described in some embodiments of the present application;
[0026] Figure 7 This is a schematic structural diagram of the second type of latch described in some embodiments of this application;
[0027] Figure 8 This is a schematic structural diagram of the third type of latch described in some embodiments of this application.
[0028] Specifically, the annotations of the accompanying drawings are as follows:
[0029] 100, battery cover assembly; 110, cover; 111, accommodating groove; 112, first avoidance opening; 120, first plastic part; 121, second avoidance opening; 130, second plastic part; 131, protruding structure; 132, tab avoidance opening; M, tongue; N, slot. DETAILED DESCRIPTION
[0030] To make the contents of the embodiments of this application clearer, the following description will be made in conjunction with the accompanying drawings. It is understood that the contents mentioned below are only some of the embodiments of this application, and all embodiments are listed in detail. Therefore, without inventive work, other embodiments obtained based on the following embodiments fall within the scope of protection of this application.
[0031] It should be understood that the terms used herein are for the purpose of describing specific embodiments only and are not intended to strictly limit the technical solutions unless the context clearly indicates otherwise. For example, the use of "a," "an," and "the" to modify a feature does not exclude the possibility that the feature may be plural in other embodiments.
[0032] It should be understood that the terms "include," "comprising," and "having" are open-ended, indicating the presence of the stated features but not excluding the possibility of additional features in the embodiment. Similarly, when terms such as first, second, etc. are used herein to describe multiple features, they are merely used to distinguish one feature from another and do not imply a sequence or order unless the context clearly indicates otherwise.
[0033] It should be understood that, unless the context clearly indicates otherwise, the terms "disposed," "connected," and "installed" should be interpreted broadly. For example, they may refer to fixed, detachable, or integral connections; they may be directly connected or indirectly connected through a medium. Those skilled in the art will understand the specific meanings of these terms in the context of the text based on the specific circumstances.
[0034] In addition, for the convenience of description, the text will use terms of spatial relative relationships to illustrate the position of one feature relative to another feature, such as "inside", "outside", "end", "side", "upper", "middle", "lower", "high", "lower", "axial", "circumferential", "radial", "horizontal", "vertical", "first direction", "second direction", etc. It can be understood that the spatial relative relationship between two features should include other specific situations in addition to those shown in the drawings of the specification.
[0035] The embodiments of the present application are described below with reference to the accompanying drawings.
[0036] First, refer to Figures 1 to 4 The present application proposes a battery cover assembly 100, which includes a cover 110, a first plastic part 120 and a second plastic part 130. The outer side of the cover 110 is provided with a receiving groove 111, and a first avoidance opening 112 is opened in the receiving groove 111. The first plastic part 120 is provided with a second avoidance opening 121. The first plastic part 120 is embedded in the receiving groove 111, and the second avoidance opening 121 is aligned with the first avoidance opening 112; the second plastic part 130 is attached to the inner side of the cover 110, and the second plastic part 130 is provided with a protruding structure 131, which passes through the first avoidance opening 112, and a tab avoidance opening 132 is opened in the middle of the protruding structure 131, and the tab avoidance opening 132 is aligned with the second avoidance opening 121.
[0037] In the present application, a receiving groove 111 is provided on the outer side surface of the cover plate 110, and the first plastic part 120 is embedded in the receiving groove 111 to reduce the overall thickness and improve space utilization. Moreover, the protruding structure 131 of the second plastic part 130 passes through the first avoidance opening 112 of the cover plate 110, and the tab avoidance opening 132 in the middle of the protruding structure 131 is used to pass the tab. The tab avoidance opening 132 is aligned with the second avoidance opening 121, so that the tab and the pole can be connected in the receiving groove 111, further improving space utilization and thereby increasing the volume energy density of the battery.
[0038] In some embodiments, reference Figures 3 to 5 , a latch M is provided at one of the tab avoidance opening 132 and the second avoidance opening 121, and a slot N is provided at the other of the tab avoidance openings 132 and 121, and the latch M is engaged with the slot N. In some embodiments, referring to Figure 6 , the tongue M is a single body structure, and the slot N is a single slot that matches the tongue M. In some embodiments, the tongue M is a double body structure in groups, and the slot N is a double slot that matches the tongue M. In some embodiments, referring to Figure 7 , the two tongues M in the group are arranged opposite to each other. In some embodiments, referring to Figure 8 , the two tongues M in a group are arranged back to back.
[0039] In the above embodiment, the first plastic part 120 and the second plastic part 130 are fixedly connected via the latch tongue M and the latch slot N, and the cover plate 110 is sandwiched between them, which is firmly fixed and convenient for assembly.
[0040] In some embodiments, reference Figure 5 The size of the contact portion between the latch M and the slot N in the X direction is a, 0.1mm≤a≤1mm. In some embodiments, a latch M is provided at the tab avoidance opening 132, and a slot N is provided at the second avoidance opening 121. The latch M is not higher than the top of the first plastic part 120 in the Z direction, such as Figure 5 As shown, the distance between the tab M and the top of the upper plastic is b.
[0041] In the above embodiment, if a is too small, the fixing effect is poor, and if a is too large, assembly cannot be performed. Therefore, a should be moderate, for example, 0.1 mm, 0.5 mm, or 1 mm. In addition, the latch M should not be higher than the top of the first plastic part 120 in the Z direction to prevent it from affecting the assembly of other parts.
[0042] In a second aspect, the present application proposes a single battery, which includes the battery cover assembly 100 of the first aspect.
[0043] In a third aspect, the present application proposes a battery pack comprising the single cell according to the second aspect.
[0044] In the above embodiments, the single cell of the second aspect and the battery pack of the third aspect both include the battery cover assembly 100 of the first aspect. Therefore, the single cell of the second aspect and the battery pack of the third aspect have at least all the technical effects of the battery cover assembly 100 of the first aspect, and their specific technical effects will not be repeated here.
[0045] The embodiments of the present application only illustrate the structures of the single cell of the second aspect and the battery pack of the third aspect that are related to the improvement points of the present application, but it does not mean that they do not have other structures. For example, the single cell also includes a battery shell covered by the battery cover assembly 100, and / or the battery pack also includes a battery frame that encapsulates multiple single cells, etc. Other structures will not be described one by one here.
[0046] In particular, the term "and / or" in this application should be understood as follows:
[0047] In the first case, the term “and / or” located between a first subject and a second subject includes any one of the following meanings: (1) only the first subject; (2) only the second subject; and (3) the first subject and the second subject.
[0048] In the second case, the term "and / or" between the last two entities in three or more entities means including at least any one of the entities. For example, "the first entity, the second entity and / or the third entity" has the same meaning as "the first entity and / or the second entity and / or the third entity", specifically including the following combinations: (1) only the first entity; (2) only the second entity; (3) only the third entity; (4) the first entity and the second entity without the third entity; (5) the first entity and the third entity without the second entity; (6) the second entity and the third entity without the first entity; and (7) the first entity, the second entity, and the third entity.
[0049] In addition, although the above content describes the embodiments of the present application in conjunction with the accompanying drawings, those skilled in the art can also make various modifications and variations without departing from the concept of the present application, and such modifications and variations will fall within the scope of protection of the present application.
Claims
1. A battery cover assembly, characterized in that: The cover plate comprises a first plastic part and a second plastic part, wherein the outer side of the cover plate is provided with a receiving groove, the receiving groove is provided with a first avoidance opening, the first plastic part is provided with a second avoidance opening, the first plastic part is embedded in the receiving groove, and the second avoidance opening is aligned with the first avoidance opening; The second plastic part is attached to the inner side of the cover plate, and the second plastic part is provided with a protruding structure, the protruding structure passes through the first avoidance opening, and a tab avoidance opening is opened in the middle of the protruding structure, and the tab avoidance opening is aligned with the second avoidance opening.
2. The battery cover assembly according to claim 1, characterized in that: A latch is provided at the position of one of the tab avoidance opening and the second avoidance opening, and a slot is provided at the other one, and the latch is engaged with the slot.
3. The battery cover assembly according to claim 2, characterized in that: The dimension of the contact portion between the latch tongue and the latch slot in the X direction is a, 0.1 mm≤a≤1 mm.
4. The battery cover assembly according to claim 2, characterized in that: A latch tongue is provided at the tab avoidance opening, and a slot is provided at the second avoidance opening. The latch tongue is not higher than the top of the first plastic part in the Z direction.
5. The battery cover assembly according to claim 2, characterized in that: The latch tongue is a single body structure, and the latch slot is a single slot matching the latch tongue.
6. The battery cover assembly according to claim 2, characterized in that: The latch tongue is a double-body structure in a group, and the latch slot is a double slot matching the latch tongue.
7. The battery cover assembly according to claim 6, characterized in that: The two latches in a group are arranged opposite to each other.
8. The battery cover assembly according to claim 6, characterized in that: The two latches in a group are arranged back to back.
9. A single cell battery, characterized in that: A battery cover assembly comprising the battery cover assembly according to any one of claims 1 to 8.
10. A battery pack, characterized in that: The invention comprises the single cell battery according to claim 9.