Vacuum oven device for preventing battery aluminum shell from bulging
By setting vacuum tubes of different pipe diameters and independent valves in the vacuum oven device, segmented vacuuming is achieved, which solves the problem that large-size lithium batteries are prone to swell during vacuum baking, and improves the performance and safety of the batteries.
Patent Information
- Application Number
- CN202420735759.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-10
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-04-10
AI Technical Summary
Large-size lithium batteries are prone to shell swelling when they are vacuum baked, which affects the battery's performance, safety and life.
A vacuum oven device is designed, which includes two vacuum tubes of different diameters and independent flow rate valves and vacuum valves, and more efficient vacuum discharge is achieved through segmented vacuum extraction.
Effectively prevent large-size aluminum-shell batteries from swelling during vacuum baking, improve battery performance, safety and life, and do not increase production processes and labor costs.
Smart Images
Figure CN222837246U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of batteries, and in particular relates to a vacuum oven device for preventing a battery aluminum shell from swelling. Background Art
[0002] Lithium-ion battery is a common rechargeable battery, which is widely used in mobile devices and electric vehicles. At present, the traditional high vacuum pipeline generally adopts a single tube and a single channel, and the vacuum of the pipeline is controlled by an electromagnetic ball valve; the limit vacuum of the traditional vacuum chamber is about -100Kap, which is suitable for baking small aluminum shell batteries. If the shell size of the aluminum shell battery is greater than ≥H27L173W500, and the thickness is between 0.6mm and 0.8mm, when the battery cell is evacuated in a high vacuum cavity, the vacuum flow rate is large, and the diameter of the vacuum pipeline is ≥φ25mm. At this time, the exhaust flow rate of the injection hole on the larger aluminum shell cover cannot keep up with the flow rate of the pipe diameter, which can easily cause the large W500 aluminum shell to swell after vacuuming under negative pressure, thereby affecting the performance, safety and service life of the battery. Utility Model Content
[0003] The present invention provides a vacuum oven device for preventing battery aluminum shell from swelling, aiming to solve the problem that the shell of existing large-sized lithium batteries is prone to swelling during vacuum baking, thus affecting the performance, safety and service life of the battery.
[0004] To achieve the above-mentioned purpose, an embodiment of the utility model provides a vacuum oven device for preventing battery aluminum shell from swelling, which is suitable for shell batteries and includes an oven body, a first vacuum tube arranged on the oven body, and a second vacuum tube arranged on the oven body; the first vacuum tube and the second vacuum tube are respectively connected to the oven body, and the diameter of the first vacuum tube is smaller than the diameter of the second vacuum tube; the first vacuum tube is provided with a first flow rate valve and a first vacuum valve, and the first flow rate valve is arranged close to the oven body; the second vacuum tube is provided with a second flow rate valve and a second vacuum valve, and the second flow rate valve is arranged close to the oven body.
[0005] As a preferred embodiment, a vacuum gauge is further provided on the first vacuum tube, and the first flow rate valve is provided between the first vacuum valve and the vacuum gauge; the vacuum gauge is respectively connected to the first vacuum tube and the oven body.
[0006] As a preferred embodiment, the first vacuum tube and the second vacuum tube are independent of each other and are arranged in parallel.
[0007] As a preferred implementation, the first flow rate valve and the second flow rate valve are arranged in parallel with each other; the first vacuum valve and the second vacuum valve are arranged in parallel with each other.
[0008] As a preferred implementation, the diameter of the first vacuum tube is ≤φ25mm; the diameter of the second vacuum tube is ≥φ60mm.
[0009] As a preferred implementation, the ratio of the diameter of the second vacuum tube to the diameter of the first vacuum tube is 12:5.
[0010] As a preferred embodiment, a plurality of the shell batteries are accommodated in the barbecue oven body; a gap is provided between two adjacent shell batteries.
[0011] As a preferred embodiment, each of the housing batteries is provided with an exhaust hole on the housing.
[0012] As a preferred embodiment, the shell battery is an aluminum shell battery; the shell size of the aluminum shell battery is ≥H27L173W500 and the thickness is 0.6mm to 0.8mm.
[0013] Since the exhaust hole on the shell battery is too small, when a large-diameter vacuum tube is used to directly evacuate, the flow rate of the exhaust hole cannot keep up with the flow rate of the large-diameter vacuum tube, which will cause the large surface W500 of the shell to swell. When using the device of this application, first start the first vacuum tube, open the first flow rate valve about 3 / 1, open the first vacuum valve, and evacuate the air in the oven body and the shell battery through the first vacuum tube, so that the inside of the aluminum shell becomes a vacuum state; when the vacuum degree of the vacuum gauge reaches -60kap, start the second vacuum tube, open the second vacuum valve and the second flow rate valve, and continue to evacuate the oven body through the joint action of the first vacuum tube and the second vacuum tube until the vacuum degree of the vacuum gauge reaches -100kap.
[0014] The present application can realize segmented vacuuming by setting vacuum tubes of different diameters on the oven body, and setting independent flow rate valves and vacuum valves on vacuum tubes of different diameters, which can effectively solve the problem that the vacuum inside the shell cannot be exhausted due to the small injection hole of the large aluminum shell and the vacuum flow rate of the exhaust hole is less than the vacuum flow rate of the large diameter vacuum tube during vacuum baking, and then the W surface of the shell is sucked up and bulged by the external vacuum. It is particularly suitable for vacuum baking of thin-walled large aluminum shell batteries with shell size ≥H27L173W500 and thickness of 0.6mm~0.8mm. Through the structure of the present application, there is no need to increase the production process and labor cost, it is simple, convenient, easy to operate, and has high economic benefits. The present application has a simple structure, can effectively prevent the shell of large-size shell batteries from bulging, and has a high output rate. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0016] Figure 1 It is a structural schematic diagram of a vacuum oven device for preventing battery aluminum shell from swelling according to an embodiment of the utility model. DETAILED DESCRIPTION
[0017] The technical solutions in the embodiments of the present utility model are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present utility model.
[0018] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0019] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0020] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.
[0021] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0022] Specifically, Figure 1 As shown, an embodiment of the utility model provides a vacuum oven device for preventing battery aluminum shell from swelling, which is suitable for shell battery 100, including an oven body 10, a first vacuum tube 20 arranged on the oven body 10, and a second vacuum tube 30 arranged on the oven body 10; the first vacuum tube 20 and the second vacuum tube 30 are respectively connected to the oven body 10, and the diameter of the first vacuum tube 20 is smaller than the diameter of the second vacuum tube 30; the first vacuum tube 20 is provided with a first flow rate valve 21 and a first vacuum valve 22, and the first flow rate valve 21 is arranged close to the oven body 10; the second vacuum tube 30 is provided with a second flow rate valve 31 and a second vacuum valve 32, and the second flow rate valve 31 is arranged close to the oven body 10.
[0023] As a preferred embodiment, a vacuum gauge 23 is further provided on the first vacuum tube 20, and the first flow rate valve 21 is provided between the first vacuum valve 22 and the vacuum gauge 23; the vacuum gauge 23 is connected to the first vacuum tube 20 and the oven body 10 respectively.
[0024] As a preferred embodiment, the first vacuum tube 20 and the second vacuum tube 30 are independent of each other and are arranged in parallel.
[0025] As a preferred embodiment, the first flow rate valve 21 and the second flow rate valve 31 are arranged in parallel with each other; the first vacuum valve 22 and the second vacuum valve 32 are arranged in parallel with each other.
[0026] As a preferred embodiment, the diameter of the first vacuum tube 20 is ≤φ25mm; the diameter of the second vacuum tube 30 is ≥φ60mm. The diameters of the first vacuum tube 20 and the second vacuum tube 30 can be set according to actual needs, and the present application can be implemented as long as the above requirements are met.
[0027] As a preferred embodiment, the ratio of the diameter of the second vacuum tube 30 to the diameter of the first vacuum tube 20 is 12:5. For example, when the diameter of the first vacuum tube 20 is φ25 mm, the diameter of the second vacuum tube 30 is φ60 mm.
[0028] As a preferred embodiment, a plurality of the shell batteries 100 are accommodated in the barbecue oven body 10 ; a gap is provided between two adjacent shell batteries 100 .
[0029] As a preferred embodiment, each of the housing batteries 100 is provided with an exhaust hole 101 on the housing.
[0030] As a preferred embodiment, the shell battery 100 is an aluminum shell battery; the shell size of the aluminum shell battery is ≥ H27L173W500 (where H refers to the height of the shell, L refers to the length of the shell, and W refers to the width of the shell), and the thickness is 0.6mm to 0.8mm. The thickness of the shell can be set according to actual needs, such as 0.6mm, 0.7mm, or 0.8mm, etc.
[0031] Since the exhaust hole on the shell battery is too small, when a large-diameter vacuum tube is used to directly evacuate, the flow rate of the exhaust hole cannot keep up with the flow rate of the large-diameter vacuum tube, which will cause the large surface W500 of the shell to swell. When using the device of this application, first start the first vacuum tube, open the first flow rate valve about 3 / 1, open the first vacuum valve, and evacuate the air in the oven body and the shell battery through the first vacuum tube, so that the inside of the aluminum shell becomes a vacuum state; when the vacuum degree of the vacuum gauge reaches -60kap, start the second vacuum tube, open the second vacuum valve and the second flow rate valve, and continue to evacuate the oven body through the joint action of the first vacuum tube and the second vacuum tube until the vacuum degree of the vacuum gauge reaches -100kap.
[0032] The present application can realize segmented vacuuming by setting vacuum tubes of different diameters on the oven body, and setting independent flow rate valves and vacuum valves on vacuum tubes of different diameters, which can effectively solve the problem that the vacuum inside the shell cannot be exhausted due to the small injection hole of the large aluminum shell and the vacuum flow rate of the exhaust hole is less than the vacuum flow rate of the large diameter vacuum tube during vacuum baking, and then the W surface of the shell is sucked up and bulged by the external vacuum. It is particularly suitable for vacuum baking of thin-walled large aluminum shell batteries with shell size ≥H27L173W500 and thickness of 0.6mm~0.8mm. Through the structure of the present application, there is no need to increase the production process and labor cost, it is simple, convenient, easy to operate, and has high economic benefits. The present application has a simple structure, can effectively prevent the shell of large-size shell batteries from bulging, and has a high output rate.
[0033] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.
[0034] In addition, it should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.
[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A vacuum oven device for preventing battery aluminum shell from swelling, characterized in that: Applicable to a shell battery, comprising an oven body, a first vacuum tube arranged on the oven body, and a second vacuum tube arranged on the oven body; the first vacuum tube and the second vacuum tube are respectively connected to the oven body, and the diameter of the first vacuum tube is smaller than the diameter of the second vacuum tube; the first vacuum tube is provided with a first flow rate valve and a first vacuum valve, and the first flow rate valve is arranged close to the oven body; the second vacuum tube is provided with a second flow rate valve and a second vacuum valve, and the second flow rate valve is arranged close to the oven body.
2. The vacuum oven device for preventing battery aluminum shell from swelling according to claim 1, characterized in that: A vacuum gauge is also provided on the first vacuum tube, and the first flow rate valve is provided between the first vacuum valve and the vacuum gauge; the vacuum gauge is connected to the first vacuum tube and the oven body respectively.
3. The vacuum oven device for preventing battery aluminum shell from swelling according to claim 1, characterized in that: The first vacuum tube and the second vacuum tube are independent of each other and are arranged in parallel.
4. The vacuum oven device for preventing battery aluminum shell from swelling according to claim 1, characterized in that: The first flow rate valve and the second flow rate valve are arranged in parallel with each other; the first vacuum valve and the second vacuum valve are arranged in parallel with each other.
5. The vacuum oven device for preventing battery aluminum shell from swelling according to claim 1, characterized in that: The diameter of the first vacuum tube is ≤φ25mm; the diameter of the second vacuum tube is ≥φ60mm.
6. The vacuum oven device for preventing battery aluminum shell from swelling according to claim 1, characterized in that: The ratio of the diameter of the second vacuum tube to the diameter of the first vacuum tube is 12:
5.
7. The vacuum oven device for preventing battery aluminum shell from swelling according to claim 1, characterized in that: A plurality of the shell batteries are accommodated in the oven body; a gap is provided between two adjacent shell batteries.
8. The vacuum oven device for preventing battery aluminum shell from swelling according to claim 7, characterized in that: The shell of each of the shell batteries is provided with an exhaust hole.
9. The vacuum oven device for preventing battery aluminum shell from swelling according to claim 8, characterized in that: The shell battery is an aluminum shell battery; the shell size of the aluminum shell battery is ≥H27L173W500 and the thickness is 0.6mm to 0.8mm.