battery

Abstract

The utility model relates to power battery technical field provides a kind of battery, comprising: shell and top cover;The shell is equipped with port along the both ends of length direction, the port is equipped with four first corner parts;The top cover is located at the port, the side of the top cover facing the shell is equipped with mounting boss, the mounting boss is equipped with four second corner parts, initial state, the second corner part is located in the inside of the first corner part, and gap is equipped between the second corner part and the first corner part.The battery provided by the utility model, by setting gap between the first corner part of the port of shell and the second corner part of the mounting boss of top cover in initial state, the probability of interference between the first corner part and the second corner part can be reduced during assembly, so as to improve the yield of battery assembly, and subsequent welding of the connection is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of power battery technology, and in particular to a battery. Background Technology

[0002] The blade battery is a new type of lithium iron phosphate battery, characterized by its "blade" shaped battery cell design.

[0003] The casing of a blade battery typically includes a housing and a top cover. In the prior art, during the assembly process, the four corners of the housing are prone to interference with the four corners of the top cover, resulting in a decrease in assembly yield. Utility Model Content

[0004] This utility model provides a battery to solve the defect in the prior art where the four corners of the casing and the four corners of the top cover easily interfere with each other during the assembly process, resulting in a decrease in assembly yield.

[0005] This utility model provides a battery, including: a casing and a top cover.

[0006] The housing has ports at both ends along its length, and each port has four first corner portions. The top cover is located at the ports, and the side of the top cover facing the housing has a mounting boss. The mounting boss has four second corner portions. In the initial state, the second corner portions are located inside the first corner portions, and there is a gap between the second corner portions and the first corner portions.

[0007] According to the battery provided by this utility model, the first corner is provided with an outwardly expanding clearance structure disposed away from the second corner.

[0008] According to the battery provided by this utility model, along the length direction of the casing, the depth L of the outward expansion and clearance structure is 0.5mm≤L≤5mm.

[0009] According to the battery provided by this utility model, along the length direction of the casing, the depth L of the outwardly expanding void structure is greater than or equal to the height H of the second corner.

[0010] According to the battery provided by this utility model, the second corner is provided with a concave clearance structure disposed away from the first corner.

[0011] According to the battery provided by this utility model, the concave clearance structure penetrates the mounting boss along the length direction of the housing (100).

[0012] According to the battery provided by this utility model, the inner edge of the port along the length direction and / or width direction is provided with a chamfered structure or a rounded corner structure.

[0013] According to the battery provided by this utility model, the outer edge of the top cover along the length direction and / or width direction is provided with a chamfered structure or a rounded corner structure.

[0014] According to the battery provided by this utility model, in the initial state, the inner sidewall of the housing is in contact with the outer sidewall of the mounting boss.

[0015] The battery provided by this utility model further includes: a battery electrode assembly, which is disposed inside the housing.

[0016] The battery provided by this utility model, by setting a gap between the first corner of the casing port and the second corner of the mounting boss of the top cover in the initial state, can reduce the probability of interference between the first corner and the second corner during assembly, thereby improving the yield rate of battery assembly and facilitating subsequent welding of the connection.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is one of the schematic diagrams of the battery provided in this embodiment of the utility model.

[0020] Figure 2 This is a second schematic diagram of the battery provided in this embodiment of the present invention.

[0021] Figure 3 This is one of the schematic diagrams of the battery casing provided in the embodiments of this utility model.

[0022] Figure 4 yes Figure 3 A magnified view of part A in the diagram.

[0023] Figure 5 This is the second schematic diagram of the battery casing provided in this embodiment of the utility model.

[0024] Figure 6 yes Figure 5 A magnified view of part B in the diagram.

[0025] Figure 7This is a schematic diagram showing the position of the mounting boss and the port in the battery provided by this embodiment of the utility model.

[0026] Figure 8 This is a schematic diagram of the recessed cavity structure in the battery provided in this embodiment of the utility model.

[0027] Figure label: 100. Housing; 110. Port; 111. First corner; 112. Outwardly expanding clearance structure; 200. Battery electrode assembly; 300. Top cover; 310. Mounting boss; 311. Second corner; 312. Inwardly recessed clearance structure; 400. Chamfered structure. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model according to the specific circumstances.

[0031] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0033] The following is combined with Figures 1 to 8 This invention describes the battery provided by this utility model.

[0034] See Figures 1 to 8 As shown, the battery provided in this embodiment of the present invention includes: a housing 100, a battery electrode assembly 200 and a top cover 300, wherein the battery electrode assembly 200 is disposed inside the housing 100.

[0035] The housing 100 has ports 110 at both ends along its length, and each port 110 includes four first corner portions 111. The top cover 300 is located at the ports 110, and the top cover 300 has a mounting boss 310 on the side facing the housing 100. The mounting boss 310 has four second corner portions 311. In the initial state, the second corner portions 311 are located inside the first corner portions 111, and there is a gap between the second corner portions 311 and the first corner portions 111.

[0036] It should be noted that the initial state referred to in this utility model embodiment is specifically the state when the top cover 300 is installed on the corresponding port 110 without being welded.

[0037] The battery provided by this utility model, by setting a gap between the first corner 111 of the port 110 of the housing 100 and the second corner 311 of the mounting boss 310 of the top cover 300 in the initial state, can reduce the probability of interference between the first corner 111 and the second corner 311 during assembly, thereby improving the yield rate of battery assembly.

[0038] Specifically, during the assembly of the top cover 300, its mounting boss 310 is aligned with the corresponding port 110, and the first corner 111 of the port 110 corresponds to the second corner 311 of the mounting boss 310. Since there is an initial gap between the first corner 111 and the second corner 311, they have sufficient clearance during assembly. This prevents the second corner 311 from interfering with the first corner 111 when the mounting boss 310 is inserted into the port 110, improving the yield rate of battery assembly and facilitating subsequent welding of the connection points.

[0039] In the initial state, there are several ways to set a gap between the second corner 311 and the first corner 111. For example, an outwardly expanding clearance structure 112 can be provided at the four first corners 111 of the port 110, so that the inner wall size of the first corner 111 is slightly larger than the inner wall size of the second corner 311 of the mounting boss 310. This way, when the mounting boss 310 is aligned with the port 110, there can be a gap with the outward expansion dimension of the outwardly expanding clearance structure 112 between the outer wall of the second corner 311 and the inner wall of the first corner 111. Alternatively, a concave clearance structure 312 can be provided at the four second corners 311 of the mounting boss 310, so that the outer wall size of the second corner 311 is slightly smaller than the outer wall size of the first corner 111. Similarly, when the mounting boss 310 is aligned with the port 110, there can be a gap with the concave dimension of the concave clearance structure 312 between the outer wall of the second corner 311 and the inner wall of the first corner 111. Of course, an outward-expanding clearance structure 112 can also be provided at the four first corners 111 of the port 110, and an inward-recessed clearance structure 312 can be provided at the four second corners 311 of the mounting boss 310.

[0040] See Figures 2 to 5 As shown, according to some embodiments of the present invention, the first corner 111 is provided with an outwardly expanding clearance structure 112 disposed away from the second corner 311.

[0041] By providing an outwardly expanding clearance structure 112 at the first corner 111 that extends away from the second corner 311, a gap can be formed between the second corner 311 and the first corner 111 in the initial state using the outwardly expanding clearance structure 112. This prevents the second corner 311 from interfering with the first corner 111 during the insertion of the mounting boss 310 into the port 110, thereby improving the yield rate of battery assembly.

[0042] Specifically, the outward expansion clearance structure 112 can be formed when the shell 100 is made of sheet metal. Pressure is applied to a designated position on the sheet metal (corresponding to the first corner 111 after bending) using mechanical equipment, causing the material to undergo a specific outward expansion deformation and appropriately increase its size. Then, the sheet metal is bent and welded to form the shell 100, and the outward expansion clearance structure 112 is formed at the first corner 111 of the port 110. Alternatively, after the shell 100 sheet metal is bent and welded to form the shell 100, mechanical equipment (such as hydraulic equipment) is used to apply force outward at the first corner 111, causing the metal material of the first corner 111 to undergo outward expansion deformation and appropriately increase its size, thus forming the outward expansion clearance structure 112.

[0043] See Figures 2 to 5 As shown, according to some embodiments of the present invention, the depth L of the outward expansion clearance structure 112 along the length direction of the shell 100 is 0.5mm≤L≤5mm.

[0044] By setting the depth L of the outward expansion clearance structure 112 to 0.5mm to 5mm, the overall shape regularity of the housing 100 can be ensured while avoiding interference between the second corner 311 and the first corner 111 during the process of the mounting boss 310 being inserted into the port 110.

[0045] Specifically, since batteries are typically assembled into battery modules, the depth of the extended clearance structure 112 must consider not only the assembly accuracy of a single battery casing 100, but also the interoperability of multiple batteries during assembly. By setting the depth of the extended clearance structure 112 within a small range of 0.5mm to 5mm, the overall shape regularity of the casing 100 is good, and it will not interfere with adjacent batteries when assembled into a battery module.

[0046] As an example, the depth L of the outward-expanding clearance structure 112 can be 0.5mm, 1mm, 3mm or 5mm, etc.

[0047] See Figure 6 and Figure 8 As shown, according to some embodiments of this utility model, the depth of the outwardly expanding clearance structure 112 along the length direction of the shell 100 (see...) Figure 6 (As shown in L) is greater than or equal to the height H of the second corner 311.

[0048] By setting the depth L of the outward expansion clearance structure 112 to be greater than or equal to the height H of the second corner 311, the outward expansion clearance structure 112 can have enough space to accommodate the second corner 311, preventing the second corner 311 from rubbing against the first corner 111 during the process of the mounting boss 310 being inserted into the port 110, thus preventing the generation of foreign objects such as metal wires and debris, which could cause short circuits or other adverse effects on the battery electrode assembly 200.

[0049] See Figure 8 As shown, according to some embodiments of the present invention, the second corner portion 311 is provided with a concave clearance structure 312 disposed away from the first corner portion 111.

[0050] By providing a recessed clearance structure 312 at the second corner 311 that is far from the first corner 111, a gap can be formed between the second corner 311 and the first corner 111 in the initial state using the recessed clearance structure 312. This prevents the second corner 311 from interfering with the first corner 111 during the process of the mounting boss 310 being inserted into the port 110, thereby improving the yield rate of battery assembly.

[0051] Specifically, the recessed clearance structure 312 can be formed at the second corner 311 of the mounting boss 310 during the stamping process of the top cover 300 using a mold of a specific shape.

[0052] See Figure 8 As shown, according to some embodiments of the present invention, the recessed clearance structure 312 through which the boss 310 is installed is installed along the length direction of the shell 100.

[0053] By setting the recessed clearance structure 312 as a through mounting boss 310, it is possible to avoid interference between the second corner 311 and the first corner 111 during the process of the mounting boss 310 being inserted into the port 110, and to prevent the first corner 111 of the port 110 from rubbing against the second corner 311 of the mounting boss 310 to generate foreign objects such as metal wires and shavings, which could cause short circuits to the battery electrode assembly 200.

[0054] See Figure 4 and Figure 7 As shown, according to some embodiments of the present invention, the inner edge of the port 110 along the length and width directions is provided with a chamfer structure 400 or a rounded corner structure.

[0055] By providing a chamfered structure 400 or a rounded corner structure on the inner edge of the port 110 along the length and width directions, it is possible to prevent the mounting boss 310 from scratching when it is inserted into the port 110. This can effectively reduce the entry of impurities such as metal wires and chips caused by scratching into the housing 100, which could cause short circuits or other adverse effects on the battery electrode assembly 200.

[0056] During processing, the inner edge of the plate can be ground at a predetermined position before bending and welding to form the shell 100, forming a chamfered structure 400 or a rounded corner structure. Alternatively, the inner edge of the port 110 can be ground after the plate has been bent and welded to form the shell 100, forming a chamfered structure 400 or a rounded corner structure.

[0057] Since the inner edge dimension of port 110 along the width direction is small, after the sheet metal is bent and welded to form the shell 100, it is difficult for the grinding tool to grind the inner edge of port 110 along the width direction. In some embodiments, a chamfer structure 400 or a rounded corner structure can be provided only on the inner edge of port 110 along the length direction to simplify the processing.

[0058] Before the sheet metal is bent and welded to form the housing 100, the inner edge of the sheet metal can be ground at a predetermined position to form a chamfered structure 400 or a rounded corner structure. In some embodiments, to meet the special design requirements of the housing 100 (such as size or spatial layout limitations), the chamfered structure 400 or the rounded corner structure can also be provided only on the inner edge of the port 110 along the width direction.

[0059] As an example, in this embodiment, the inner edge of the port 110 along both the length and width directions is provided with a chamfer structure 400. The chamfer structure 400 is easier to process and manufacture than the rounded corner structure, and can be directly polished using a polishing tool.

[0060] See Figure 7 As shown, according to some embodiments of the present invention, the outer edge of the top cover 300 along the length and width directions is provided with a chamfered structure 400 or a rounded corner structure.

[0061] By providing a chamfered structure 400 or a rounded corner structure on the outer edge of the top cover 300 along the length and width directions, it is possible to prevent the mounting boss 310 from scratching when it is inserted into the port 110, thereby reducing the entry of impurities such as metal wires and chips caused by scratching into the housing 100 and causing adverse effects such as short circuits to the battery electrode assembly 200.

[0062] Similarly, the chamfered structure 400 or rounded corner structure on the outer edge of the top cover 300 along the length and width directions can also be formed by grinding.

[0063] Of course, in some embodiments, a chamfered structure 400 or a rounded corner structure may be provided only on the outer edge of the top cover 300 along the length and width directions, without any special limitation.

[0064] As an example, in this embodiment, the top cover 300 has a chamfered structure 400 on its outer edge along both the length and width directions.

[0065] See Figure 7 As shown, according to some embodiments of the present invention, in the initial state, the inner wall of the housing 100 is in contact with the outer wall of the mounting boss 310.

[0066] In the initial state, by fitting the inner wall of the housing 100 to the outer wall of the mounting boss 310, the stability of the top cover 300 during welding and fixing can be ensured, and the welding quality can be improved.

[0067] That is, in the initial state, except for the positions of the first corner 111 and the second corner 311, the other positions of the port 110 and the mounting boss 310 are in a fitted state, which can ensure the stability of the top cover 300 during installation, thereby improving the subsequent welding quality.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A battery, characterized in that, include: The housing has ports at both ends along its length, and each port has four first corner portions; The top cover is located at the port. The top cover has a mounting boss on the side facing the housing. The mounting boss has four second corners. In the initial state, the second corners are located inside the first corners, and there is a gap between the second corners and the first corners.

2. The battery according to claim 1, characterized in that, The first corner is provided with an outwardly expanding clearance structure located away from the second corner.

3. The battery according to claim 2, characterized in that, Along the length of the shell, the depth L of the outward-expanding clearance structure is 0.5mm≤L≤5mm.

4. The battery according to claim 2, characterized in that, Along the length of the shell, the depth L of the outward-expanding clearance structure is greater than or equal to the height H of the second corner.

5. The battery according to claim 1, characterized in that, The second corner is provided with a recessed clearance structure located away from the first corner.

6. The battery according to claim 5, characterized in that, Along the length of the housing, the recessed clearance structure passes through the mounting boss.

7. The battery according to any one of claims 1 to 6, characterized in that, The inner edge of the port along the length and / or width direction is provided with a chamfered structure or a rounded corner structure.

8. The battery according to any one of claims 1 to 6, characterized in that, The outer edge of the top cover along its length and / or width is provided with a chamfered or rounded corner structure.

9. The battery according to any one of claims 1 to 6, characterized in that, In the initial state, the inner wall of the housing is in contact with the outer wall of the mounting boss.

10. The battery according to any one of claims 1 to 6, characterized in that, Also includes: A battery electrode assembly, wherein the battery electrode assembly is disposed within the housing.

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