CN219286499U - Secondary battery formation electrolyte return system - Google Patents
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Abstract
Description
技术领域technical field
本实用新型涉及电池化成技术领域,尤其涉及一种二次电池化成电解液回流系统。The utility model relates to the technical field of battery formation, in particular to a secondary battery formation electrolyte backflow system.
背景技术Background technique
在二次电池的生产过程中激活其性能的主要方式为化成柜充电激活,在二次电池的负压化成过程中,负压化成设备通过压力控制系统来调节电池内部的气体,通过负压真空系统从电池的注液口处抽取电池化成过程中产生的气体,在此过程中,电池内部的一部分电解液会随上述气体一起被抽至一个暂存的容器内(残液杯或废液杯),这会造成电解液的浪费。The main way to activate the performance of the secondary battery during the production process is to charge and activate the formation cabinet. During the negative pressure formation process of the secondary battery, the negative pressure formation equipment adjusts the gas inside the battery through the pressure control system, and the negative pressure vacuum The system extracts the gas generated during the formation process of the battery from the liquid injection port of the battery. During this process, a part of the electrolyte inside the battery will be pumped together with the above gas into a temporary storage container (residual liquid cup or waste liquid cup ), which will cause a waste of electrolyte.
为了避免电解液的浪费,一般采用正压干燥系统向容器内充入干燥的气体将电解液重新注入电池内,但由于充入干燥的气体的量很难把控,会导致多余的干燥气体进入电池内部,使电池外壳鼓胀、报废甚至发生电池爆炸等现象,危害和损失较大。In order to avoid the waste of electrolyte, a positive pressure drying system is generally used to fill the container with dry gas to reinject the electrolyte into the battery. However, it is difficult to control the amount of dry gas filled, which will cause excess dry gas to enter Inside the battery, the battery casing will bulge, be scrapped or even explode, causing great harm and loss.
因此,亟需提出一种二次电池化成电解液回流系统,以解决上述问题。Therefore, there is an urgent need to propose a secondary battery formation electrolyte reflow system to solve the above problems.
实用新型内容Utility model content
本实用新型提供一种二次电池化成电解液回流系统,通过负压使电解液自动回流至电池内,避免回流电解液时出现电池鼓胀现象,结构简单,工作可靠性较高。The utility model provides a reflow system for secondary battery formation electrolyte, which automatically reflows the electrolyte into the battery through negative pressure, avoids battery swelling when the electrolyte is reflowed, has simple structure and high working reliability.
为达此目的,本实用新型采用以下技术方案:For this purpose, the utility model adopts the following technical solutions:
二次电池化成电解液回流系统,包括负压源、气液分离器、第一开关、第二开关、液体收集器、第三开关、第四开关和流量计;Secondary battery formed electrolyte return system, including negative pressure source, gas-liquid separator, first switch, second switch, liquid collector, third switch, fourth switch and flow meter;
所述负压源用于提供负压,所述气液分离器的出气口与所述负压源连通,所述第一开关的进口与电池的注液口连通,所述第一开关的出口与所述第二开关的进口连通,所述第二开关的出口与所述气液分离器的进气口连通,所述气液分离器的出液口与所述液体收集器的第一进液口连通,所述液体收集器上设有泄压口,所述泄压口与所述常压干燥气源连通,所述第三开关的进口与所述气液分离器的出液口连通,所述第三开关的出口与所述液体收集器的第一进液口连通,所述第四开关的进口与所述液体收集器的出液口连通,所述第四开关的出口与所述第一开关的出口连通,所述流量计的进口与所述第四开关的出口连通,所述流量计的出口与所述第一开关的出口连通。The negative pressure source is used to provide negative pressure, the gas outlet of the gas-liquid separator communicates with the negative pressure source, the inlet of the first switch communicates with the liquid injection port of the battery, and the outlet of the first switch communicates with the negative pressure source. It is connected with the inlet of the second switch, the outlet of the second switch is connected with the inlet of the gas-liquid separator, and the liquid outlet of the gas-liquid separator is connected with the first inlet of the liquid collector. The liquid port is connected, the liquid collector is provided with a pressure relief port, the pressure relief port is connected with the normal pressure dry gas source, and the inlet of the third switch is connected with the liquid outlet of the gas-liquid separator , the outlet of the third switch communicates with the first liquid inlet of the liquid collector, the inlet of the fourth switch communicates with the liquid outlet of the liquid collector, and the outlet of the fourth switch communicates with the liquid collector The outlet of the first switch is connected, the inlet of the flowmeter is connected with the outlet of the fourth switch, and the outlet of the flowmeter is connected with the outlet of the first switch.
可选地,还包括:Optionally, also include:
比例阀,所述比例阀的进口与所述气液分离器的出气口连通,所述比例阀的出口与所述负压源连通。A proportional valve, the inlet of the proportional valve communicates with the gas outlet of the gas-liquid separator, and the outlet of the proportional valve communicates with the negative pressure source.
可选地,还包括:Optionally, also include:
第五开关,所述第五开关的进口与所述常压干燥气源连通,所述第五开关的出口与所述泄压口连通。A fifth switch, the inlet of the fifth switch communicates with the normal-pressure dry gas source, and the outlet of the fifth switch communicates with the pressure relief port.
可选地,所述液体收集器至少有部分结构的颜色为透明色。Optionally, at least part of the structure of the liquid collector is transparent in color.
可选地,还包括:Optionally, also include:
液位传感器,设置在所述液体收集器内;a liquid level sensor arranged in the liquid collector;
供液设备,与所述液体收集器的第二进液口连通;Liquid supply equipment, communicated with the second liquid inlet of the liquid collector;
控制模块,所述液位传感器和所述供液设备均与所述控制模块信号连接,所述控制模块能够根据所述液位传感器传递的液位信号控制所述供液设备为所述液体收集器输入电解液。A control module, the liquid level sensor and the liquid supply equipment are both signal-connected to the control module, and the control module can control the liquid supply equipment to collect the liquid according to the liquid level signal transmitted by the liquid level sensor input electrolyte.
可选地,所述液位传感器为接触式液位传感器或非接触式液位传感器。Optionally, the liquid level sensor is a contact liquid level sensor or a non-contact liquid level sensor.
可选地,所述负压源包括真空泵。Optionally, the negative pressure source includes a vacuum pump.
可选地,所述第一开关为电磁阀;和/或:Optionally, the first switch is a solenoid valve; and/or:
所述第二开关为电磁阀;和/或:The second switch is a solenoid valve; and/or:
所述第三开关为电磁阀;和/或:The third switch is a solenoid valve; and/or:
所述第四开关为电磁阀;The fourth switch is a solenoid valve;
所述二次电池化成电解液回流系统还包括控制模块,所述流量计、所述第一开关、所述第二开关、所述第三开关和所述第四开关均与所述控制模块信号连接,所述控制模块能够根据所述流量计的流量信号控制所述第一开关、所述第二开关、所述第三开关以及所述第四开关的开闭。The secondary battery formation electrolyte return system also includes a control module, and the flow meter, the first switch, the second switch, the third switch and the fourth switch are all connected to the control module The control module can control the opening and closing of the first switch, the second switch, the third switch and the fourth switch according to the flow signal of the flow meter.
可选地,所述第五开关为通气阀。Optionally, the fifth switch is a ventilation valve.
本实用新型的有益效果:The beneficial effects of the utility model:
本实用新型提供一种二次电池化成电解液回流系统,包括负压源、气液分离器、第一开关、第二开关、液体收集器、常压干燥气源、第三开关、第四开关和流量计。电池在进行负压化成时,打开第一开关、第二开关和第三开关,关闭第四开关,电池内部携带电解液的气体在负压源的作用下进入气液分离器中,气液分离器将气体和电解液分离,气体通过负压源排放,电解液流入液体收集器中储存,此时,电池内部为负压环境;电池完成负压化成后,关闭第二开关和第三开关,打开第四开关和第一开关,由于液体收集器中一直为常压状态,因此,液体收集器中的电解液能够自动流入负压状态的电池中,避免了电解液的浪费,同时不会有外部气体进入电池内部的风险,避免电池鼓胀,有利于保护电池。The utility model provides a secondary battery formation electrolyte return system, comprising a negative pressure source, a gas-liquid separator, a first switch, a second switch, a liquid collector, a normal pressure dry gas source, a third switch, and a fourth switch and flow meter. When the battery is forming under negative pressure, the first switch, the second switch, and the third switch are turned on, and the fourth switch is turned off. The gas carrying the electrolyte inside the battery enters the gas-liquid separator under the action of the negative pressure source, and the gas-liquid separation The gas is separated from the electrolyte, the gas is discharged through the negative pressure source, and the electrolyte flows into the liquid collector for storage. At this time, the inside of the battery is in a negative pressure environment; after the battery completes the negative pressure formation, turn off the second switch and the third switch, Turn on the fourth switch and the first switch, since the liquid collector is always in the normal pressure state, therefore, the electrolyte in the liquid collector can automatically flow into the battery in the negative pressure state, avoiding the waste of the electrolyte, and at the same time there will be no The risk of external gas entering the inside of the battery, avoiding battery swelling, is conducive to protecting the battery.
附图说明Description of drawings
为了更清楚地说明本实用新型实施例中的技术方案,下面将对本实用新型实施例描述中所需要使用的附图作简单的介绍,显而易见地,下面描述中的附图仅仅是本实用新型的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据本实用新型实施例的内容和这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only the illustrations of the present invention. For some embodiments, those of ordinary skill in the art can also obtain other drawings according to the content of the embodiments of the present invention and these drawings without any creative effort.
图1是本实用新型实施例提供的二次电池化成电解液回流系统的结构示意图。Fig. 1 is a schematic structural diagram of a reflow system for forming an electrolyte of a secondary battery provided by an embodiment of the present invention.
图中:In the picture:
1、负压源;2、气液分离器;3、第一开关;4、第二开关;5、电池;6、液体收集器;7、常压干燥气源;8、第三开关;9、第四开关;10、流量计;11、比例阀;12、第五开关;13、供液设备。1. Negative pressure source; 2. Gas-liquid separator; 3. First switch; 4. Second switch; 5. Battery; 6. Liquid collector; 7. Normal pressure dry gas source; 8. Third switch; 9 , the fourth switch; 10, the flow meter; 11, the proportional valve; 12, the fifth switch; 13, the liquid supply equipment.
具体实施方式Detailed ways
下面结合附图和实施例对本实用新型作进一步的详细说明。可以理解的是,此处所描述的具体实施例仅仅用于解释本实用新型,而非对本实用新型的限定。另外还需要说明的是,为了便于描述,附图中仅示出了与本实用新型相关的部分而非全部结构。Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail. It can be understood that the specific embodiments described here are only used to explain the utility model, rather than limit the utility model. In addition, it should be noted that, for the convenience of description, only some structures related to the present utility model are shown in the drawings but not all structures.
在本实用新型的描述中,除非另有明确的规定和限定,术语“相连”、“连接”、“固定”应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或成一体;可以是机械连接,也可以是电连接;可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言,可以具体情况理解上述术语在本实用新型中的具体含义。In the description of the present utility model, unless otherwise clearly stipulated and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or a Integral; it can be mechanically or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.
在本实用新型中,除非另有明确的规定和限定,第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触,也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且,第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方,或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方,或仅仅表示第一特征水平高度小于第二特征。In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, and may also include the first and second features being in direct contact with each other. The features are not in direct contact but through another feature between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.
在本实施例的描述中,术语“上”、“下”、“左”、“右”等方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述和简化操作,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本实用新型的限制。此外,术语“第一”、“第二”仅仅用于在描述上加以区分,并没有特殊的含义。In the description of this embodiment, the terms "up", "down", "left", "right" and other orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operations. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in description, and have no special meaning.
本实施例提供一种二次电池化成电解液回流系统,通过负压使电解液自动回流至电池5内,与现有技术中采用正压干燥系统使得电解液回流相比,能够避免电解液回流时出现电池5鼓胀现象,结构简单,工作可靠性较高。This embodiment provides a reflow system for secondary battery formation electrolyte, which automatically reflows the electrolyte into the
具体地,如图1所示,该二次电池化成电解液回流系统包括负压源1、气液分离器2、第一开关3、第二开关4、液体收集器6、常压干燥气源7、第三开关8、第四开关9和流量计10。其中,负压源1用于提供负压,负压源1可选但不限定为真空泵。气液分离器2的出气口与负压源1连通,气液分离器2用于将电解液从携带电解液的湿润气体中分离出来。第一开关3的进口与电池5的注液口连通,第一开关3的出口与第二开关4的进口连通,第二开关4的出口与气液分离器2的进气口连通,开启负压源1,电池5内的携带电解液的气体被抽出,进入气液分离器2内等待分离。气液分离器2的出液口与液体收集器6的第一进液口连通,液体收集器6上设有泄压口,泄压口与常压干燥气源7连通,气液分离器2分离出的电解液储存在液体收集器6内,为了保证电解液能够顺利流入液体收集器6内且不会受外界湿润气体的干扰而影响电解液的质量,液体收集器6通过泄压口与常压干燥气源7连通,常压干燥气源7能够使液体收集器6内的电解液保持常压,且由于常压干燥气源7为常压,因此不会自动进入电池5内,避免电池5充气鼓胀。第三开关8的进口与气液分离器2的出液口连通,第三开关8的出口与液体收集器6的第一进液口连通。第四开关9的进口与液体收集器6的出液口连通,第四开关9的出口与第一开关3的出口连通。流量计10的进口与第四开关9的出口连通,流量计10的出口与第一开关3的出口连通。Specifically, as shown in Figure 1, the secondary battery formation electrolyte return system includes a negative pressure source 1, a gas-liquid separator 2, a
上述二次电池化成电解液回流系统的工作过程为:The working process of the above-mentioned secondary battery formation electrolyte return system is as follows:
在电池5负压化成阶段:开启第一开关3、第二开关4和第三开关8,关闭第四开关9,在负压源1的作用下,携带电解液的气体从电池5中排出并进入气液分离器2内被分离,分离后的气体通过负压源1排出,电解液流入液体收集器6中储存,电池5内部为负压状态。In the negative pressure forming stage of the battery 5: open the
电解液回流阶段:此时,电池5负压化成结束,开启第一开关3和第四开关9,关闭第二开关4和第三开关8,由于液体收集器6内为常压,压强大于电池5内部的压强,因此,液体收集器6内的电解液会自动回流至电池5内,流量计10会显示流回电池5内部的电解液量,当流量计10不再变化时,表明液体收集器6内的电解液不再回流至电池5内,此时,若流量计10显示的回流至电池5内的电解液达到预设值时,则结束回流,预设值可以根据实验获得,在本实施例中,预设值为6g-8g;若流量计10显示的回流至电池5内的电解液未达到预设值时,则再次启动负压源1,打开第一开关3、第二开关4和第三开关8,关闭第四开关9,使电池5内部再次为负压状态,然后关闭第二开关4和第三开关8,打开第四开关9,使液体收集器6内的液体继续回流至电池5内,多次循环这个过程,直至回流至电池5内部的电解液达到预设值。Electrolyte reflux stage: At this time, the negative pressure formation of the
本实施例提供的二次电池化成电解液回流系统通过电池5内部的负压使液体收集器6内的电解液自动回流至电池5内,避免电解液的浪费,降低了电池5的材料成本。并且能够保证不会有外界气体进入电池5内,避免了电池5因充气鼓胀而损坏,有利于保护电池5。The secondary battery formed electrolyte return system provided in this embodiment automatically returns the electrolyte in the
进一步地,在本实施例中,第一开关3可以但不限定为电磁阀,同样地,第二开关4可以但不限定为电磁阀,第三开关8可以但不限定为电磁阀,第四开关9可以但不限定为电磁阀,上述二次电池化成电解液回流系统还包括控制模块,流量计10、第一开关3、第二开关4、第三开关8和第四开关9均与控制模块信号连接,控制模块能够根据流量计10的流量信号控制第一开关3、第二开关4、第三开关8以及第四开关9的开闭,进而实现对上述二次电池化成电解液回流系统的智能化控制。由于电解液具有一定的腐蚀性,因此,第一开关3、第二开关4、第三开关8和第四开关9可以采用耐腐蚀材料制成。Further, in this embodiment, the
需要说明的是,本申请中的“控制模块”的具体形式包括但不限于PLC等。It should be noted that the specific forms of the "control module" in this application include but are not limited to PLC and the like.
可选地,上述二次电池化成电解液回流系统还包括比例阀11,比例阀11的进口与气液分离器2的出气口连通,比例阀11的出口与负压源1连通。通过设置比例阀11,能够根据电池5内所需负压的大小灵活调整负压源1的抽气量,降低了抽气过多的风险,提高了负压源1工作的稳定性。Optionally, the secondary battery formation electrolyte return system further includes a
可选地,上述二次电池化成电解液回流系统还包括第五开关12,第五开关12的进口与常压干燥气源7连通,第五开关12的出口与泄压口连通。在上述二次电池化成电解液回流系统工作时,第五开关12为常开状态,当无需使用上述二次电池化成电解液回流系统或系统维修时,可以关闭第五开关12,避免常压干燥气源7的浪费。第五开关12可选但不限定为通气阀。Optionally, the secondary battery formation electrolyte return system further includes a
优选地,为了便于观察液体收集器6内的电解液量,液体收集器6至少有部分结构的颜色为透明色。液体收集器6可以为残液杯或废液杯。Preferably, in order to facilitate the observation of the amount of electrolyte in the
值得说明的是,上述二次电池化成电解液回流系统在最初使用时,液体收集器6中可以已有部分电解液,也可以没有电解液,若液体收集器6内最初无电解液,则最初进行负压化成的电池5也可以不回流电解液,将储存在液体收集器6内的电解液给一下批次进行负压化成的电池5使用,只要电解液没有被浪费即可。It is worth noting that, when the above-mentioned secondary battery formation electrolyte return system is initially used, there may be part of the electrolyte in the
进一步地,上述二次电池化成电解液回流系统还包括液位传感器(图中未示出)、供液设备13和控制模块(图中未示出),液位传感器设置在液体收集器6内,用于实时检测电解液的液位。液体收集器6还设置有第二进液口,供液设备13与液体收集器6的第二进液口连通,供液设备13能够为液体收集器6输送电解液。液位传感器和供液设备13均与控制模块信号连接,控制模块能够根据液位传感器传递的液位信号控制供液设备13为液体收集器6输入电解液。通过设置供液设备13和液位传感器,能够保证液体收集器6中的电解液始终保持充足,进而保证负压化成后的电池5都能够回流一定数量的电解液(即当液体收集器6内的电解液的量不能满足电池5所需要的电解液回流量时,设置供液设备13就可对液体收集器6进行补给,以满足负压化成后的电池5内都能够回流电池5所需要的电解液回流量),有利于批量生产。可选地,液位传感器可以为接触式液位传感器或非接触式液位传感器,根据实际需要设置即可。Further, the above-mentioned reflow system for secondary battery formation electrolyte also includes a liquid level sensor (not shown in the figure), a
显然,本实用新型的上述实施例仅仅是为了清楚说明本实用新型所作的举例,而并非是对本实用新型的实施方式的限定。对于所属领域的普通技术人员来说,能够进行各种明显的变化、重新调整和替代而不会脱离本实用新型的保护范围。这里无需也无法对所有的实施方式予以穷举。凡在本实用新型的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本实用新型权利要求的保护范围之内。Apparently, the above-mentioned embodiments of the present utility model are only examples for clearly illustrating the present utility model, rather than limiting the implementation manner of the present utility model. Various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. It is not necessary and impossible to exhaustively list all the implementation manners here. All modifications, equivalent replacements and improvements made within the spirit and principles of the utility model shall be included in the protection scope of the claims of the utility model.
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