Battery shell assembly and battery

Abstract

The utility model belongs to the technical field of batteries, and particularly discloses a battery shell assembly and a battery, a groove is arranged on a top plate of a shell, an air vent is enclosed between the groove and an upper plastic part, and two ends of the groove extend out of the upper plastic part. When the sealing element is not installed, the gap between the third installation hole of the lower plastic part and the pole, the gap between the first installation hole of the top plate and the pole, the gap between the second installation hole of the upper plastic part and the pole and the ventilation opening are sequentially communicated to form an exhaust channel, and the two ends of the exhaust channel are communicated with the external space and the containing space of the shell respectively. Therefore, when the sealing element is not installed, a temporary sealing effect cannot be formed between the upper plastic part and the shell, the battery shell assembly cannot pass helium detection, neglected installation of the sealing element can be judged, and the detection accuracy is improved. The utility model further provides a battery which comprises the battery shell assembly.

Description

Technical Field

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

[0002] At present, the structure of cylindrical batteries generally includes a battery shell, a pole, a seal, an upper plastic part and a lower plastic part. The pole is passed through and installed on the battery shell. The seal is sleeved on the pole and clamped between the battery shell and the pole to ensure the sealing between the battery shell and the pole. The upper plastic part and the lower plastic part are clamped between the pole and the battery shell to insulate the pole from the battery shell.

[0003] During battery assembly, seals may be missing. Because the seals are located within the electrode assembly mounting holes, conventional testing cannot determine whether they are missing. Furthermore, during subsequent helium testing, the upper and lower plastic parts fit against the end faces of the battery casing, providing a temporary seal. This can lead to some batteries passing helium testing despite missing seals. However, this temporary seal will eventually fail to guarantee the battery's tightness, reducing the battery's yield rate. Utility Model Content

[0004] The purpose of the utility model is to provide a battery housing assembly and a battery, which solves the problem of missing seals but still passing the helium test by improving the structural design of the housing, and the battery has a high yield rate.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] In one aspect, the present invention provides a battery housing assembly, comprising:

[0007] A housing, the housing comprising a top plate and a peripheral side plate, the top plate and the peripheral side plate being connected to form an accommodating space, the top plate being provided with a first mounting hole, and an outer end surface of the top plate being provided with a groove;

[0008] an upper plastic part, located outside the accommodating space, and provided with a second mounting hole;

[0009] a lower plastic part, located in the accommodating space, and provided with a third mounting hole;

[0010] A pole, sequentially passed through the third mounting hole, the first mounting hole, and the second mounting hole, the upper plastic part being sandwiched between the pole and the outer end surface of the top plate, and the lower plastic part being sandwiched between the pole and the inner end surface of the top plate;

[0011] A vent is formed between the groove and the upper plastic part. Along the radial direction of the second mounting hole, both ends of the groove extend out of the upper plastic part. The gap between the third mounting hole and the pole, the gap between the first mounting hole and the pole, the gap between the second mounting hole and the pole, and the vent are sequentially connected to form an exhaust channel. The two ends of the exhaust channel are respectively connected to the external space and the accommodating space.

[0012] A sealing member is sleeved on the outside of the pole and clamped between the pole and the inner wall of the second mounting hole, and is used to seal the gap between the pole and the inner wall of the second mounting hole, and the communication port between the groove and the second mounting hole.

[0013] Optionally, along the radial direction of the second mounting hole, the size of the groove is a, the size of the upper plastic part is b, and a>b.

[0014] Optionally, a plurality of the grooves are provided, and the plurality of grooves are evenly spaced apart in the circumferential direction of the first mounting hole.

[0015] Optionally, the groove is waist-shaped or rectangular, and the length direction of the groove extends along the radial direction of the first mounting hole.

[0016] Optionally, the pole includes a first abutment portion, a column portion, and a second abutment portion connected in sequence, the second abutment portion is located in the accommodating space and presses the lower plastic part against the top plate, the column portion is sequentially passed through the third mounting hole, the first mounting hole, and the second mounting hole, the first abutment portion is located outside the accommodating space and presses the upper plastic part against the top plate.

[0017] Optionally, a recess is provided on a side of the upper plastic component facing away from the top plate, and the first abutting portion is at least partially located in the recess.

[0018] Optionally, an annular flange is provided around the third mounting hole, the annular flange extends toward the top plate and into the first mounting hole, and the annular flange is sandwiched between the pole and the inner wall of the first mounting hole.

[0019] Optionally, the battery housing assembly includes a bottom plate, and the peripheral side plate is arranged on a side away from the top plate to form an opening, and the bottom plate is connected to the peripheral side plate and blocks the opening.

[0020] On the other hand, the present invention provides a battery, comprising a pole group and a battery housing assembly according to any of the above schemes, wherein the pole group is arranged in the battery housing assembly.

[0021] Optionally, the battery is a cylindrical battery.

[0022] The beneficial effects of the utility model are:

[0023] The utility model provides a battery housing assembly, wherein the top plate of the housing is provided with a first mounting hole, the upper plastic part is provided with a second mounting hole, and the lower plastic part is provided with a third mounting hole. The electrode group is sequentially inserted through the third mounting hole, the first mounting hole, and the second mounting hole from the side of the top plate closest to the accommodating space. The upper plastic part is clamped between the electrode post and the outer end surface of the top plate, and the lower plastic part is clamped between the electrode post and the inner end surface of the top plate. A groove is provided on the top plate, and a vent is formed between the groove and the upper plastic part. Along the radial direction of the second mounting hole, the two ends of the groove extend from the side of the upper plastic part closest to the second mounting hole and the side of the upper plastic part facing away from the second mounting hole. When the seal is not installed, the gap between the third mounting hole and the electrode post, the gap between the first mounting hole and the electrode post, the gap between the second mounting hole and the electrode post, and the vent are sequentially connected to form an exhaust channel, and the two ends of the exhaust channel are respectively connected to the external space and the accommodating space. Therefore, when the seal is not installed, a temporary sealing effect cannot be formed between the upper plastic part and the shell, and the battery shell assembly cannot pass the helium inspection. It can be determined that the seal is missing, the accuracy of the inspection is improved, and the product yield is higher.

[0024] The present invention also provides a battery comprising a pole group and the aforementioned battery housing assembly. The pole group is enclosed within the housing of the battery housing assembly, the pole lugs of the pole group being connected to the second abutting portions of the pole posts, and the pole posts enabling communication between the pole group and an external circuit. By employing the aforementioned battery housing assembly, it is possible to avoid the situation where a seal is missing and the battery still passes the helium test, thereby improving the accuracy of the helium test and increasing the battery yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a battery housing assembly provided in an embodiment of the present utility model;

[0026] Figure 2 is a cross-sectional view of a battery housing assembly provided in an embodiment of the present utility model;

[0027] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle;

[0028] Figure 4 This is a partial cross-sectional view of the battery housing assembly provided in an embodiment of the present invention without a seal installed;

[0029] Figure 5 It is a structural schematic diagram of the housing provided in an embodiment of the present utility model.

[0030] In the picture:

[0031] 100, housing; 110, top plate; 111, first mounting hole; 112, groove; 120, peripheral side plate; 121, opening; 200, upper plastic part; 201, second mounting hole; 202, sink groove; 300, lower plastic part; 310, annular flange; 311, third mounting hole; 400, pole; 410, first abutting portion; 420, column portion; 430, second abutting portion; 500, sealing member. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0033] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0034] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0035] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0036] like Figure 1-Figure 3As shown, this embodiment provides a battery shell assembly, including a shell 100, an upper plastic part 200, a lower plastic part 300, a pole 400 and a seal 500. The shell 100 includes a top plate 110 and a peripheral side plate 120. The top plate 110 and the peripheral side plate 120 are connected and enclose a receiving space. The upper plastic part 200 is located outside the receiving space and is attached to the outer end surface of the top plate 110. The lower plastic part 300 is located inside the receiving space and is attached to the inner end surface of the top plate 110. Among them, the top plate 110 is provided with a first mounting hole 111, the upper plastic part 200 is provided with a second mounting hole 201, and the lower plastic part 300 is provided with a third mounting hole 311. The pole group is sequentially penetrated through the third mounting hole 311, the first mounting hole 111 and the second mounting hole 201 from the side of the top plate 110 close to the receiving space. The upper plastic component 200 is sandwiched between the pole 400 and the outer end surface of the top plate 110, while the lower plastic component 300 is sandwiched between the pole 400 and the inner end surface of the top plate 110. The arrangement of the upper plastic component 200 and the lower plastic component 300 provides insulation between the pole 400 and the top plate 110. It should be noted that the outer end surface of the top plate 110 refers to the end surface facing away from the accommodating space, while the inner end surface of the top plate 110 refers to the end surface facing toward the accommodating space.

[0037] Furthermore, a groove 112 is provided on the outer end surface of the top plate 110, and a vent is formed between the groove 112 and the upper plastic part 200. Figure 1 and Figure 2 The two ends of the groove 112 extend from the side of the upper plastic part 200 close to the second mounting hole 201 and the side of the upper plastic part 200 away from the second mounting hole 201. Figure 4 ), the gap between the third mounting hole 311 and the terminal 400, the gap between the first mounting hole 111 and the terminal 400, the gap between the second mounting hole 201 and the terminal 400, and the vent are sequentially connected to form an exhaust channel, the ends of which are connected to the outside space and the accommodating space, respectively. Therefore, when the seal 500 is not installed, the temporary seal between the upper plastic part 200 and the housing 100 cannot be formed, and the battery housing assembly cannot pass the helium test. It can be determined that the seal 500 is missing, which improves the accuracy of the test and increases the product yield rate.

[0038] After the seal 500 is installed, the seal 500 is sleeved on the outside of the pole 400 and clamped between the pole 400 and the inner wall of the second mounting hole 201. The seal 500 can seal the gap between the pole 400 and the inner wall of the second mounting hole 201, as well as the connecting port between the groove 112 and the second mounting hole 201. At this time, the battery shell assembly can pass the helium inspection.

[0039] Continue to see Figure 3, along the radial direction of the second mounting hole 201, the dimension of the groove 112 is a, and the dimension of the upper plastic part 200 is b, where a>b. This ensures that both ends of the groove 112 along the radial direction of the second mounting hole 201 can extend outside the upper plastic part 200, so that the vent formed by the groove 112 and the upper plastic part 200 can connect the second mounting hole 201 with the external space. When the seal 500 is not installed, a sealing surface cannot be formed between the upper plastic part 200 and the shell 100, and the battery shell assembly cannot pass the helium inspection, thereby improving the accuracy of the helium inspection and preventing the battery shell assembly without the seal 500 from flowing into the next process. Exemplarily, (ab) / 2>0.3mm, that is, one end of the groove 112 extends beyond the dimension of the upper plastic part 200 by more than 0.3mm. For example, the value of ab can be 0.3mm, 0.5mm, 0.8mm, or 1.0mm, etc., so that the flow area of the exhaust channel is larger, the exhaust is smooth, and the helium inspection results are more accurate.

[0040] In this embodiment, there are multiple grooves 112, and the multiple grooves 112 are evenly spaced around the circumference of the first mounting hole 111. Figure 5 This embodiment uses four grooves 112 as an example, with the angle between two adjacent grooves 112 being 90°. This ensures that the first mounting hole 111 is connected to the outside world along its circumference, resulting in more uniform exhaust. Furthermore, the grooves 112 in this embodiment can be waist-shaped or rectangular, with their length extending radially along the first mounting hole 111. This allows both ends of the grooves 112 to extend outside the upper plastic component 200, thereby connecting the accommodating space with the outside world.

[0041] Continue to see Figure 1 and Figure 3 The pole 400 in this embodiment includes a first abutting portion 410, a column portion 420, and a second abutting portion 430 connected in sequence. The second abutting portion 430 is located in the accommodating space and presses the lower plastic part 300 against the inner end surface of the top plate 110. The column portion 420 is sequentially inserted into the third mounting hole 311, the first mounting hole 111, and the second mounting hole 201. The first abutting portion 410 is located outside the accommodating space and presses the upper plastic part 200 against the outer end surface of the top plate 110. The pole 400 can be fixedly mounted on the housing 100 by the first abutting portion 410 and the second abutting portion 430, and the first abutting portion 410 and the second abutting portion 430 can be aligned along the axial direction of the second mounting hole 201 ( Figure 1 The seal 500 is pressed from both sides (in the Z-axis direction), and the seal 500 expands along the radial direction of the second mounting hole 201, thereby sealing the gap between the column portion 420 of the pole 400 and the inner wall of the second mounting hole 201.

[0042] Optionally, a recessed groove 202 is provided on the side of the upper plastic member 200 facing away from the top plate 110, with the first abutting portion 410 at least partially located within the recessed groove 202. The provision of the recessed groove 202 improves the accuracy of positioning between the upper plastic member 200 and the terminal 400, thereby enhancing assembly precision. Furthermore, since at least a portion of the first abutting portion 410 is embedded within the recessed groove 202, the height of the battery housing assembly along the axial direction of the second mounting hole 201 can be reduced, resulting in improved space utilization and facilitating a higher energy density for the battery.

[0043] Furthermore, an annular flange 310 is provided around the third mounting hole 311. The annular flange 310 extends toward the top plate 110 and into the first mounting hole 111. Figure 1 The annular flange 310 is sandwiched between the pole 400 and the inner wall of the first mounting hole 111, and is arranged along the axial direction of the first mounting hole 111 ( Figure 1 The annular flange 310 (in the Z-axis direction) can press the seal 500 against the first abutment portion 410 of the pole 400. The provision of the annular flange 310 can improve the positioning accuracy between the lower plastic component 300 and the housing 100, thereby increasing assembly precision and ensuring a good sealing effect.

[0044] The battery housing assembly also includes a bottom plate (not shown in the figure). The peripheral side plate 120 is arranged on the side away from the top plate 110 to form an opening 121. The bottom plate is connected to the peripheral side plate 120 and blocks the opening 121. At this time, the accommodating space is a closed space.

[0045] This embodiment also provides a battery, including a pole group and the above-mentioned battery shell assembly. The pole group can be installed in the accommodating space through the opening 121 on one side of the shell 100, and then the bottom plate is welded to the peripheral side plate 120 of the shell 100 to encapsulate the pole group in the battery shell assembly. The pole ear of the pole group is connected to the second abutment portion 430 of the pole post 400. The pole group can be connected to the external circuit through the pole post 400 so that the pole group can be powered or charged externally. By adopting the above-mentioned battery shell assembly, it is possible to avoid the situation where the seal 500 is not installed and still passes the helium test, which is beneficial to improve the accuracy of the helium test and improve the battery yield.

[0046] As an optional solution, the battery in this embodiment is a cylindrical battery, in which case the top plate 110 and the bottom plate are circular plates, and the peripheral side plate 120 is cylindrical. Of course, in other embodiments, the battery can also be a square battery or a blade battery, which will not be described in detail here.

[0047] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A battery housing assembly, characterized in that: include; A housing (100), the housing (100) comprising a top plate (110) and a peripheral side plate (120), the top plate (110) and the peripheral side plate (120) being connected to form an accommodating space, the top plate (110) being provided with a first mounting hole (111), and an outer end surface of the top plate (110) being provided with a groove (112); An upper plastic part (200) is located outside the accommodating space, and the upper plastic part (200) is provided with a second mounting hole (201); A lower plastic part (300) is located in the accommodating space, and the lower plastic part (300) is provided with a third mounting hole (311); The pole (400) is sequentially inserted into the third mounting hole (311), the first mounting hole (111), and the second mounting hole (201); the upper plastic part (200) is sandwiched between the pole (400) and the outer end surface of the top plate (110); and the lower plastic part (300) is sandwiched between the pole (400) and the inner end surface of the top plate (110); A vent is formed between the groove (112) and the upper plastic part (200), and along the radial direction of the second mounting hole (201), both ends of the groove (112) extend out of the upper plastic part (200), the gap between the third mounting hole (311) and the pole (400), the gap between the first mounting hole (111) and the pole (400), the gap between the second mounting hole (201) and the pole (400), and the vent are sequentially connected to form an exhaust channel, and both ends of the exhaust channel are respectively connected to the external space and the accommodating space; A sealing member (500) is sleeved outside the pole (400) and sandwiched between the pole (400) and the inner wall of the second mounting hole (201), and is used to seal the gap between the pole (400) and the inner wall of the second mounting hole (201), as well as the communication port between the groove (112) and the second mounting hole (201).

2. The battery housing assembly according to claim 1, wherein: Along the radial direction of the second mounting hole (201), the size of the groove (112) is a, the size of the upper plastic part (200) is b, and a>b.

3. The battery housing assembly according to claim 1, wherein: A plurality of the grooves (112) are provided, and the plurality of grooves (112) are evenly spaced in the circumferential direction of the first mounting hole (111).

4. The battery housing assembly according to claim 1, wherein: The groove (112) is waist-shaped or rectangular, and the length direction of the groove (112) extends along the radial direction of the first mounting hole (111).

5. The battery housing assembly according to claim 1, wherein: The pole (400) includes a first abutting portion (410), a column portion (420) and a second abutting portion (430) connected in sequence, the second abutting portion (430) is located in the accommodating space and presses the lower plastic part (300) against the top plate (110), the column portion (420) is sequentially passed through the third mounting hole (311), the first mounting hole (111) and the second mounting hole (201), the first abutting portion (410) is located outside the accommodating space and presses the upper plastic part (200) against the top plate (110).

6. The battery housing assembly according to claim 5, characterized in that A sinking groove (202) is provided on a side of the upper plastic part (200) facing away from the top plate (110), and the first abutting portion (410) is at least partially located in the sinking groove (202).

7. The battery housing assembly according to claim 1, wherein: An annular flange (310) is provided around the third mounting hole (311), the annular flange (310) extending in the direction of the top plate (110) and extending into the first mounting hole (111), and the annular flange (310) is sandwiched between the pole (400) and the inner wall of the first mounting hole (111).

8. The battery housing assembly according to claim 1, wherein: The battery housing assembly comprises a bottom plate, the peripheral side plate (120) is arranged on a side away from the top plate (110) to form an opening (121), and the bottom plate is connected to the peripheral side plate (120) and blocks the opening (121).

9. A battery, characterized in that: The invention comprises a pole group and a battery casing assembly according to any one of claims 1 to 8, wherein the pole group is arranged in the battery casing assembly.

10. The battery according to claim 9, characterized in that The battery is a cylindrical battery.

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