阅读说明：本技术 一种电池的封装方法 (Battery packaging method ) 是由 夏华敏 陈俊杰 章勇 冯海杰 关木林 杨俊� 刘建华 刘金成 于 2020-11-25 设计创作，主要内容包括：本发明公开了一种电池的封装方法,电池包括依次相连的头部、脖口部及本体部。电池的封装方法包括：S1：在脖口部涂上防锈油涂层；S2：将热缩套套设在电池上,且热缩套覆盖脖口部、本体部及头部的一部分；S3：对热缩套进行热缩。该封装方法能够控制热缩包覆尺寸并且较好地降低热缩套上出现折痕的几率,既能够提升电池的外观良率,又能控制电池热缩后的尺寸,从而方便电池模组的正常组装。(The invention discloses a packaging method of a battery, wherein the battery comprises a head part, a neck part and a body part which are sequentially connected. The packaging method of the battery comprises the following steps: s1: coating an anti-rust oil coating on the neck; s2: sleeving the heat shrinkable sleeve on the battery, wherein the heat shrinkable sleeve covers the neck part, the body part and a part of the head part; s3: and carrying out heat shrinkage on the heat shrinkable sleeve. The packaging method can control the size of the thermal shrinkage coating, well reduce the probability of crease marks on the thermal shrinkage sleeve, improve the appearance yield of the battery, and control the size of the battery after thermal shrinkage, thereby facilitating the normal assembly of the battery module.)

1. A method for packaging a battery, wherein the battery comprises a head part (1), a neck part (2) and a body part (3) which are connected in sequence, the method comprising:

s1: coating an anti-rust oil coating on the neck part (2);

s2: sleeving a heat-shrinkable sleeve (4) on the battery, wherein the heat-shrinkable sleeve (4) covers the neck part (2), the body part (3) and a part of the head part (1);

s3: and carrying out heat shrinkage on the heat-shrinkable sleeve (4).

2. The method for packaging a battery according to claim 1, wherein step S3 includes:

s31: carrying out first heat shrinkage on the heat shrinkable sleeve (4);

s32: and carrying out second heat shrinkage on the heat shrinkable sleeve (4), wherein the temperature of the second heat shrinkage is lower than that of the first heat shrinkage, and the time length of the second heat shrinkage is longer than that of the first heat shrinkage.

3. The method for packaging a battery according to claim 2, wherein the first heat-shrinking is performed by using an annular heat-shrinking device, and the second heat-shrinking is performed by using a horizontal heat-shrinking device.

4. The method for packaging a battery according to claim 2, wherein the first heat-shrinking time is 6s-8 s.

5. The method for packaging a battery according to claim 2, wherein the temperature of the first heat-shrinking is 190-340 ℃.

6. The method for packaging a battery according to claim 2, wherein the temperature of the second heat-shrinking is 100 ℃ to 110 ℃.

7. The method for packaging a battery according to claim 2, wherein the second heat-shrinking time is 66s-72 s.

8. The battery packaging method according to claim 1, wherein the thickness of the heat shrinkable sleeve (4) is 0.06mm to 0.08 mm.

9. The battery packaging method according to claim 8, wherein the thickness of the heat shrinkable sleeve (4) after heat shrinking is less than 0.2 mm.

10. The method for packaging a battery according to claim 1, wherein the oiling of the battery is performed by using a rotating brush in step S1, the oil dropping interval of the rotating brush is 600S, and the oil dropping time is 3S.

Technical Field

The invention relates to the technical field of battery production and manufacturing processes, in particular to a battery packaging method.

Background

Bare shell battery surface fat liquoring can effectually prevent the battery phenomenon of rustting, and nevertheless the fat liquoring mode is very crucial, and the improper orientation of fat liquoring can influence pyrocondensation cladding size to lead to the outward appearance defective rate of battery to be on the high side (2% defective products probably). Meanwhile, after the oil coating is finished, a heat-shrinkable sleeve needs to be sleeved on the bare-shell battery. Present pyrocondensation technology can lead to the pyrocondensation to accomplish the crease on back battery surface comparatively obvious at present, has promoted the outward appearance defective rate of battery on the one hand, and on the other hand can increase the size behind the battery pyrocondensation for the unable normal equipment of carrying out battery module of battery.

Disclosure of Invention

The invention aims to provide a packaging method of a battery, which can control the size of a thermal shrinkage coating, well reduce the probability of crease marks on a thermal shrinkage sleeve, improve the appearance yield of the battery and control the size of the battery after thermal shrinkage, thereby facilitating the normal assembly of a battery module.

In order to achieve the technical effects, the technical scheme of the invention is as follows:

the invention discloses a packaging method of a battery, wherein the battery comprises a head part, a neck part and a body part which are sequentially connected, and the packaging method of the battery comprises the following steps: s1: coating an anti-rust oil coating on the neck; s2: sleeving a heat-shrinkable sleeve on the battery, wherein the heat-shrinkable sleeve covers the neck part, the body part and a part of the head part; s3: and carrying out heat shrinkage on the heat-shrinkable sleeve.

In some embodiments, step S3 includes: s31: carrying out first heat shrinkage on the heat shrinkable sleeve; s32: and carrying out second heat shrinkage on the heat shrinkable sleeve, wherein the temperature of the second heat shrinkage is lower than that of the first heat shrinkage, and the time length of the second heat shrinkage is longer than that of the first heat shrinkage.

In some embodiments, the first heat-shrinking is performed using an annular heat-shrinking apparatus and the second heat-shrinking is performed using a horizontal heat-shrinking apparatus.

In some specific embodiments, the first heat-shrink has a duration of 6s to 8 s.

In some specific embodiments, the first heat-shrinking temperature is 190 ℃ to 340 ℃.

In some specific embodiments, the second heat-shrink has a heat-shrink temperature of 100 ℃ to 110 ℃.

In some specific embodiments, the second heat-shrink has a duration of 66s to 72 s.

In some embodiments, the heat shrink sleeve has a thickness of 0.06mm to 0.08 mm.

In some specific embodiments, the thickness of the heat shrink sleeve after heat shrinking is less than 0.2 mm.

In some embodiments, the oiling of the battery is performed in step S1 using a rotating brush with an oil drip interval of 600S and an oil drip duration of 3S each.

According to the packaging method of the battery, the mode that only the neck part of the battery is coated with oil is adopted, so that the shrinkage rate of the heat-shrinkable sleeve is reduced, the probability of crease occurrence on the heat-shrinkable sleeve is reduced, and the yield of the battery is improved.

Additional aspects and advantages of the 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.

Drawings

Fig. 1 is a schematic step diagram of a method for packaging a battery according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of the unassembled construction of the battery and heat shrink sleeve.

Fig. 3 is a bar graph of the shrinkage of the heat shrink sleeve on the battery head when different parts of the battery are oiled.

Fig. 4 is a bar graph of the shrinkage of the battery's tail heat shrink sleeve when various portions of the battery are oiled.

Fig. 5 is a bar graph of the shrinkage of the entire heat shrink sleeve as different portions of the battery were oiled.

Reference numerals:

1. a head portion; 2. a neck part; 3. a body portion; 4. and (4) heat-shrinkable sleeves.

Detailed Description

In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features for distinguishing between descriptive features, non-sequential, non-trivial and non-trivial. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Specific steps of a method for packaging a battery according to an embodiment of the present invention will be described with reference to fig. 1 to 5.

The invention discloses a method for packaging a battery, as shown in figure 1, the battery comprises a head part 1, a neck part 2 and a body part 3 which are connected in sequence. As shown in fig. 2, the method for packaging a battery includes:

s1: coating an anti-rust oil coating on the neck part 2;

s2: sleeving the heat shrinkable sleeve 4 on the battery, wherein the heat shrinkable sleeve 4 covers the neck part 2, the body part 3 and a part of the head part 1;

s3: carrying out heat shrinkage on the heat shrinkable sleeve 4;

it will be appreciated that in practice, the application of oil only to the neck portion 2 of the battery will reduce the shrinkage of the heat-shrinkable sleeve 4 in the subsequent heat-shrinking step, with the amount of oil applied remaining unchanged. Specifically, as shown in fig. 3, after the whole battery is oiled (the oiling is performed on the battery rotated by using a rotating brush), the shrinkage rate of the heat-shrinkable sleeve 4 of the head 1 is 7.92%, and after the whole battery is oiled (the oiling is performed on the battery rotated by using a reciprocating linear-motion brush), the shrinkage rate of the heat-shrinkable sleeve 4 of the head 1 is 18.6%; after only the neck portion 2 of the battery was oiled, the shrinkage rate of the heat-shrinkable sleeve 4 was 7.49%, and when the heat-shrinkable sleeve 4 was directly heat-shrunk without oiling the battery, the shrinkage rate of the heat-shrinkable sleeve 4 of the head portion 1 was 11.9%. Therefore, the packaging method of the embodiment can reduce the shrinkage rate of the heat-shrinkable sleeve 4 of the battery head part 1, so that the yield of the battery in the packaging process is improved.

As shown in fig. 4, after the whole battery is oiled, the shrinkage rate of the heat shrinkable sleeve 4 at the tail part of the body part 3 is 71.62%, and after the whole battery is oiled, the shrinkage rate of the heat shrinkable sleeve 4 at the tail part of the body part 3 is 35.9%; after only the neck portion 2 of the battery was oiled, the shrinkage rate of the heat shrinkable sleeve 4 at the tail portion of the body portion 3 was 30.95%, and when the heat shrinkable sleeve 4 was directly heat-shrunk without oiling the battery, the shrinkage rate of the heat shrinkable sleeve 4 at the tail portion of the body portion 3 was 8.7%. Although the shrinkage rate of the heat shrinkable sleeve 4 at the tail part of the body part 3 is the minimum under the condition that the heat shrinkable sleeve 4 is directly subjected to heat shrinkage without coating oil on the battery, the rusting probability of the battery is improved. Therefore, the packaging method of the embodiment can reduce the shrinkage rate of the heat shrinkable sleeve 4 at the tail part of the body part 3 under the condition of ensuring that the battery is not rusted, thereby improving the yield in the battery packaging process.

As shown in fig. 5, after the oil immersion treatment of the heat shrinkable sleeve 4, the shrinkage of the whole heat shrinkable sleeve 4 is 12.85%, after the oil is applied to the whole battery, the shrinkage of the whole heat shrinkable sleeve 4 is 2.67%, and after the oil is applied to the whole battery, the shrinkage of the whole heat shrinkable sleeve 4 is 1.81%; only after the neck portion 2 of the battery was oiled, the shrinkage rate of the heat shrinkable sleeve 4 was 1.32%, and when the heat shrinkable sleeve 4 was heat shrunk without oiling the battery, the shrinkage rate of the heat shrinkable sleeve 4 at the tail portion of the body portion 3 was 0.72%. Although the shrinkage of the entire heat shrinkable sleeve 4 is minimal without direct heat shrinkage of the heat shrinkable sleeve 4 by applying oil to the battery, this increases the chance of rusting of the battery. Therefore, the packaging method of the embodiment can reduce the shrinkage rate of the heat shrinkable sleeve 4 at the tail part of the body part 3 under the condition of ensuring that the battery is not rusted, thereby improving the yield in the battery packaging process.

According to the packaging method of the battery, the oil is only applied to the neck part 2 of the battery, so that the shrinkage rate of the heat-shrinkable sleeve 4 is reduced, the probability of crease marks on the heat-shrinkable sleeve 4 is reduced, and the yield of the battery is improved.

In some embodiments, step S3 includes: s31: carrying out first heat shrinkage on the heat shrinkable sleeve 4; s32: and carrying out second heat shrinkage on the heat shrinkable sleeve 4, wherein the temperature of the second heat shrinkage is lower than that of the first heat shrinkage, and the time length of the second heat shrinkage is longer than that of the first heat shrinkage.

It can be understood that, carry out the second time pyrocondensation again after carrying out the first time pyrocondensation to the battery, because the temperature of second time pyrocondensation is lower than the temperature of first time pyrocondensation, and the length of time of second time pyrocondensation is longer than the length of time of first time pyrocondensation, the crease department that first time pyrocondensation produced can disappear after the second time pyrocondensation to compressed the thickness after 4 pyrocondensations of pyrocondensation cover, thereby make the size of whole battery diminish, made things convenient for the equipment of battery module.

It should be noted that, in the battery packaging method of the present invention, the possibility of the occurrence of the crease on the heat shrinkable sleeve 4 is fundamentally greatly reduced by applying the oil to the neck portion 2 of the battery, but the occurrence of the crease cannot be completely eradicated. In the subsequent step, the mode of adopting the first heat shrinkage fit and the second heat shrinkage fit can remove the generated crease, thereby further reducing the residual rate of the crease.

In some specific embodiments, the first heat shrinking is performed using an annular heat shrinking apparatus. Therefore, the efficiency and the effect of the first heat shrinkage can be improved.

In some specific embodiments, the length of the first heat shrink is 6s-8 s. It will be appreciated that the purpose of the first heat-shrinking is primarily to allow the heat-shrink sleeve 4 to be wrapped around the battery relatively quickly, which may cause the heat-shrink sleeve 4 to be connected to the battery unreliable if the time for the first heat-shrinking is too short, and the heat-shrink sleeve 4 may fall off the battery during the process from the first heat-shrinking to the second heat-shrinking. The time of the first heat-shrinkable sleeve is too long, which aggravates the number of creases generated by the heat-shrinkable sleeve 4 after the first heat-shrinkable sleeve is subjected to the first heat-shrinkable sleeve, so that even if the creases can be removed through the second heat-shrinkable sleeve, the number of the creases is too many, which still increases the fraction defective of the battery. In the embodiment, the duration of the first thermal shrinkage is controlled to be between 6s and 8s, so that the connection stability between the thermal shrinkage sleeve 4 and the battery can be ensured, the thermal shrinkage sleeve 4 is prevented from falling, the number of creases generated in the first thermal shrinkage process can be controlled, and the reject ratio of the battery is reduced.

In some specific embodiments, the temperature of the first heat shrink is from 190 ℃ to 340 ℃. It can be understood that the purpose of the first heat shrinkage is mainly to make the heat shrinkable sleeve 4 wrap on the battery faster, if the temperature of the first heat shrinkage is lower, the connection between the heat shrinkable sleeve 4 and the battery is unreliable, and the heat shrinkable sleeve 4 may fall off from the battery in the process from the first heat shrinkage to the second heat shrinkage. And the high temperature of the thermal shrinkage for the first time will aggravate the crease quantity that thermal shrinkable sleeve 4 produced after the thermal shrinkage for the first time, even if follow-up crease can also be got rid of through the thermal shrinkage for the second time like this, nevertheless still can promote the defective rate of battery because the crease is too many. In the embodiment, the temperature of the first thermal shrinkage is controlled to be 190-340 ℃, so that the connection stability between the thermal shrinkage sleeve 4 and the battery can be ensured, the thermal shrinkage sleeve 4 is prevented from falling off, the number of creases generated in the first thermal shrinkage process can be controlled, and the reject ratio of the battery is reduced.

Of course, it should be additionally noted that different heat shrinking temperatures can be adjusted according to different heat shrinking devices for the first heat shrinking. Specifically, when the heat-shrinkable baffle of the annular heat-shrinkable device is in the shape of an arc, the temperature for the first heat-shrinkage can be relatively high and is 300-340 ℃. If the heat-shrinkable baffle of the annular heat-shrinkable device is rectangular, the temperature of the first heat-shrinkable needs to be reduced by a little, and can be 190-230 ℃. That is, the temperature and time of the first thermal shrinkage can be adjusted within the standard range.

In some embodiments, the second heat shrink is performed using a horizontal heat shrink apparatus. From this, the battery carries out the pyrocondensation at the in-process of horizontal pyrocondensation equipment transportation, can carry out comprehensive second pyrocondensation to the battery like this to it produces the crease to eliminate once pyrocondensation betterly.

In some specific embodiments, the second heat shrink has a duration of 66s to 72 s. It can be understood that the purpose of the second heat-shrinking is mainly to remove the creases generated by the first heat-shrinking, and if the time for the second heat-shrinking is too short, the creases are not removed completely, thereby increasing the fraction defective of the battery. And the second thermal shrinkage for too long time can generate new creases after the creases generated by the first thermal shrinkage are smoothed, so that the reject ratio of the battery is increased. In the embodiment, the time length of the second heat shrinkage is controlled between 66s and 72s, so that the crease eliminating effect in the second heat shrinkage process can be ensured, the crease generated in the second heat shrinkage process can be avoided, and the reject ratio of the battery is low.

In some specific embodiments, the second heat shrink has a heat shrink temperature of 100 ℃ to 110 ℃. It can be understood that the purpose of the second thermal shrinkage is mainly to make the crease generated by the first thermal shrinkage removed, and if the temperature of the second thermal shrinkage is too low, the crease cannot be removed completely, so that the reject ratio of the battery is improved. And the temperature of the second thermal shrinkage is too high, new creases are generated after the creases generated by the first thermal shrinkage are smoothed, and thus the reject ratio of the battery is increased. In the embodiment, the temperature of the second thermal shrinkage is controlled to be between 100 and 110 ℃, so that the crease eliminating effect in the second thermal shrinkage process can be ensured, the crease generated in the second thermal shrinkage process can be avoided, and the reject ratio of the battery is low.

In some embodiments, heat shrink wrap 4 has a thickness of 0.06mm to 0.08 mm. It can be understood that the size of the heat shrinkable sleeve 4 after heat shrinkage can be compressed by the heat shrinkable sleeve 4 with a smaller thickness, so that the battery module is convenient to assemble.

Preferably, heat shrink wrap 4 has a thickness of 0.06mm to 0.75 mm.

In some embodiments, the thickness of the heat shrinkable sleeve 4 after the first heat-shrinkage and the second heat-shrinkage is less than 0.2mm, thereby facilitating the assembly of the battery module. Therefore, the size of the heat shrinkable sleeve 4 after heat shrinkage is better controlled, and the battery module is convenient to assemble.

In some embodiments, the battery is oiled by using a rotating brush in step S1, the oil dropping interval of the rotating brush is 600S, and the oil dropping time is 3S each time. It will be appreciated that the greater amount of oil on the rotating brush will result in a thicker oil layer at the neck 2 of the battery, which is detrimental to the heat shrinking process of the heat shrink sleeve 4. The less oil on the rotating brush results in poor rust prevention of the battery. Through the oil drip clearance of control rotary brush and at every turn long oil drip can control the oil reservoir thickness of the neck portion 2 of battery better to both make things convenient for 4 pyrocondensations of pyrocondensation cover, can promote the rust-resistant effect of battery again.

Example (b):

a method of packaging a battery according to an embodiment of the present invention is described below.

The first step is as follows: a rotating brush is adopted to coat the neck part 2 of the battery with oil, the oil dripping interval of the rotating brush is 600s, and the oil dripping time of each time is 3 s;

the second step is that: sleeving a heat-shrinkable sleeve 4 on the battery, wherein the heat-shrinkable sleeve 4 covers the neck part 2, the body part 3 and a part of the head part 1, and the thickness of the heat-shrinkable sleeve 4 is 0.06mm-0.75 mm;

the third step: carrying out first heat shrinkage on the heat shrinkable sleeve 4 by adopting annular heat shrinkage equipment, wherein the heat shrinkage time is 6-8 s, and the heat shrinkage temperature is 300-340 ℃;

the fourth step: and performing secondary heat shrinkage on the heat shrinkable sleeve 4 by adopting horizontal heat shrinkage equipment, wherein the heat shrinkage time is 66-72 s, and the heat shrinkage temperature is 100-110 ℃.

In the description herein, references to the description of "some embodiments," "other embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.