CN218274744U - Battery case, battery monomer, battery and power consumption device - Google Patents
Battery case, battery monomer, battery and power consumption device Download PDFInfo
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- CN218274744U CN218274744U CN202222657199.8U CN202222657199U CN218274744U CN 218274744 U CN218274744 U CN 218274744U CN 202222657199 U CN202222657199 U CN 202222657199U CN 218274744 U CN218274744 U CN 218274744U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The application relates to a battery shell, a battery monomer, a battery and an electric device. A battery case includes a bottom case, a top cover, and an absorption assembly. The bottom shell is provided with a containing cavity and an opening which is positioned on one side of the bottom shell and communicated with the containing cavity, the top cover is covered on the opening side of the bottom shell, the absorption assembly is arranged in the top cover, and the top cover is provided with an air guide part which can allow air in the containing cavity to flow to the absorption assembly. The absorption assembly is used for absorbing reaction gas generated by electrochemical reaction in the accommodating cavity. The reaction gas generated by the electrochemical reaction in the accommodating cavity can be effectively absorbed by the absorption assembly, the gas pressure in the inner space of the battery can be effectively avoided from being too high, the safety of the battery is improved, and the potential safety hazard of the battery is reduced.
Description
Technical Field
The application relates to the technical field of batteries, in particular to a battery shell, a battery monomer, a battery and an electric device.
Background
Traditional battery is in the use, and the inside gas that produces of battery can lead to the atmospheric pressure increase of battery inner space, and then leads to the potential safety hazard of battery great, for example when the atmospheric pressure of battery inner space is too big, serious problems such as bloated or leakage can take place for the casing of battery.
SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide a battery case, a battery cell, a battery and an electric device, which can reduce the potential safety hazard of the battery, in order to solve the problem of large potential safety hazard of the conventional battery.
According to a first aspect of the present application, there is provided a battery case including a bottom case, a top cover, and an absorption member. The bottom shell is provided with a containing cavity and an opening which is positioned on one side of the bottom shell and communicated with the containing cavity, the top cover is covered on the opening side of the bottom shell, the absorption assembly is arranged in the top cover, and the top cover is provided with an air guide part which can allow air in the containing cavity to flow to the absorption assembly. The absorption assembly is used for absorbing reaction gas generated by electrochemical reaction in the accommodating cavity.
In the technical scheme of this application, the absorption assembly is located in the top cap, and be used for absorbing the reactant gas who holds intracavity electrochemical reaction and produce, can understand, the absorption assembly highly can be higher than the liquid level height who holds the electrolyte of intracavity, so, both can avoid the absorption assembly and hold the electrolyte contact of intracavity and be soaked by the electrolyte that holds the intracavity, again usable this absorption assembly absorbs the reactant gas who holds intracavity electrochemical reaction and produce effectively, can effectively avoid battery inner space's atmospheric pressure too high, improve the security of battery, and reduce the potential safety hazard of battery.
In one embodiment, the top cover includes a cover body and an electrical isolation member disposed on the cover body facing the opening side of the bottom casing, the cover body covers the opening side of the bottom casing, an accommodating groove for accommodating the absorption assembly is disposed between the electrical isolation member and the cover body, and the air guide portion is disposed on the electrical isolation member and communicates with the accommodating groove and the accommodating cavity. Therefore, the reaction gas generated by the electrochemical reaction in the accommodating cavity can flow into the accommodating groove through the gas guide part and can be contacted with the absorption component in the accommodating groove, and thus, the reaction gas generated by the electrochemical reaction in the accommodating cavity can be absorbed by the absorption component.
In one embodiment, the receiving groove has a groove bottom wall disposed opposite to and spaced apart from the cover body, and the air guide is configured as a through hole penetrating the groove bottom wall of the receiving groove. The through hole can be communicated with the containing groove and the containing cavity, so that the reaction gas generated by the electrochemical reaction in the containing cavity can be absorbed by the absorption assembly conveniently.
In one embodiment, at least one partition member is disposed in each receiving groove, the at least one partition member is used for partitioning the receiving groove into at least two sub receiving grooves which are not communicated with each other, and an absorption assembly is disposed in each sub receiving groove. The absorption components in all the sub-containing grooves are arranged at intervals and are not interfered with each other, and the absorption components are favorable for respectively absorbing the reaction gas generated by the electrochemical reaction in the containing cavity.
In one embodiment, the materials of the absorbing elements in at least two sub-receiving grooves are different to absorb different reaction gases. The at least two absorption components with different materials can not interfere with each other when reacting with corresponding reaction gas, and the gas absorption effect is improved.
In one embodiment, the partition member includes a first partition rib extending in the first direction, and a second partition rib extending in the second direction and disposed to intersect the first partition rib; the first direction and the second direction are perpendicular to each other and are parallel to the top surface of the top cover. The absorption components made of different materials can be respectively arranged in the four sub-containing grooves, so that the absorption components can not interfere with each other when reacting with corresponding reaction gas, and the gas absorption effect is improved.
In one embodiment, the electrical separator includes a first portion and a second portion disposed around the first portion, the receiving groove is disposed between the first portion and the cover body, and the second portion is provided with an abutting portion for abutting against the electrode assembly located in the receiving cavity. Therefore, the electrode assembly can be limited between the bottom wall of the accommodating cavity and the abutting part of the second part of the electric isolating piece, and the reliability of the battery is improved.
In one embodiment, the cap body and the electrical isolator are removably connected. Therefore, the absorbing component in the containing groove can be conveniently replaced or taken and placed.
In one embodiment, the absorbent assembly comprises a gas-absorbing component and a hydrophobic, gas-permeable membrane that is wrapped around the outside of the gas-absorbing component. Thus, the electrolyte cannot pass through the hydrophobic gas-permeable membrane, and the reaction gas can pass through the hydrophobic gas-permeable membrane, so that the reaction gas can contact with the gas absorption member in the hydrophobic gas-permeable membrane, so that the reaction gas can be absorbed by the gas absorption member.
In one embodiment, the gas absorbing member is constructed as a porous structure. The gas absorption component is of a porous structure, so that the contact area between the gas absorption component and the reaction gas can be increased, and the absorption effect of the reaction gas is further improved.
In one embodiment, the porosity of the gas absorbing member decreases from the outside to the inside. Therefore, after the reaction of the reaction gas on the outer layer of the gas absorption component, the reaction gas can enter the inner layer of the gas absorption component through the pores of the gas absorption component and then react with the inner layer of the gas absorption component, so that the utilization rate of the gas absorption component is improved, and the absorption effect of the reaction gas is favorably improved.
In one embodiment, the gas absorbing component comprises one of sodium hydroxide, calcium oxide, and copper oxide. The carbon dioxide can be absorbed by sodium hydroxide, or the carbon dioxide can be absorbed by calcium oxide, or the methane and the hydrogen can be absorbed by copper oxide.
In one embodiment, the absorbent assembly includes a reactant-gas absorbing fluid and a hydrophobic, breathable membrane that is wrapped around the reactant-gas absorbing fluid.
In one embodiment, the reactant gas absorbing fluid is chlorine gas. The reactant gas in the chamber is capable of flowing through the gas guide to the absorbent assembly, and this portion of the reactant gas is capable of passing through the hydrophobic gas permeable membrane and contacting a reactant gas absorbing fluid, such as chlorine gas, which reacts with the reactant gas (e.g., methane) to absorb methane.
According to a second aspect of the present application, a battery cell is provided, comprising the battery housing described above.
According to a third aspect of the present application, there is provided a battery including the battery cell described above.
According to a fourth aspect of the present application, there is provided an electric device including the battery described above.
Drawings
FIG. 1 illustrates a schematic structural view of a vehicle provided by some embodiments of the present application;
fig. 2 is a schematic structural diagram of a battery cell in an embodiment of the present application;
FIG. 3 illustrates a side cross-sectional view of a top cover in an embodiment of the present application;
FIG. 4 shows an enlarged schematic view at A of FIG. 3;
FIG. 5 illustrates a bottom view of a battery housing in an embodiment of the present application;
FIG. 6 shows an enlarged partial schematic view of FIG. 5;
figure 7 shows a schematic view of the structure of an absorbent assembly in an embodiment of the present application.
In the figure: 1. a vehicle; 10. a battery; 100. a battery case; 110. a bottom case; 111. an accommodating chamber; 112. an opening; 120. a top cover; 121. a cover body; 122. an electrical isolator; 1221. a first portion; 1222. a second portion; 123. an accommodating groove; 1231. a sub-receiving groove; 1232. a tank bottom wall; 1233. a side wall; 124. a partition member; 1241. a first separation rib; 1242. a second spacer rib; 125. an air guide part; 130. an absorbent assembly; 131. a gas absorbing member; 132. a hydrophobic, breathable film; 133. an adhesive layer; 200. an electrode assembly; 20. a motor; 30. and a controller.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiment in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and therefore the application is not limited to the specific embodiments disclosed below.
In the description of the present application, it is to be understood that the terms "center," "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 present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, a first feature is "on" or "under" a second feature such that the first and second features are in direct contact, or the first and second features are in indirect contact via an intermediary. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are for purposes of illustration only and do not denote a single embodiment.
When the traditional battery is used, gas generated inside the battery can increase the air pressure in the internal space of the battery, and further the potential safety hazard of the battery is large.
The applicant has found that, in the related art, in order to adsorb gas generated in the battery, a gas adsorbent is usually disposed in the battery, however, the gas adsorbent is easily wetted by the electrolyte in the battery, so that the adsorption effect of the gas adsorbent is poor, and the safety of the battery is further affected.
In order to improve the safety of the battery and reduce the potential safety hazard of the battery, the applicant designs a battery shell through intensive research, wherein the battery shell comprises a bottom shell and a top cover covering the bottom shell, an absorption assembly is arranged in the top cover, the absorption assembly can be prevented from contacting with electrolyte in the battery shell and further from being wetted by the electrolyte in the battery, and can be well used for absorbing reaction gas generated by electrochemical reaction between an electrode assembly in the battery shell and the electrolyte, so that the absorption assembly can be effectively used for absorbing the gas, the safety of the battery is improved, and the potential safety hazard of the battery is reduced.
The battery housing, the battery cell and/or the battery disclosed in the embodiments of the present application may be used in, but not limited to, an electric device such as a vehicle, a ship or an aircraft. The powered device may be, but is not limited to, a cell phone, tablet, laptop, electronic toy, electric tool, battery car, electric car, ship, spacecraft, and the like. The electric toy may include a stationary or mobile electric toy, such as a game machine, an electric car toy, an electric ship toy, an electric airplane toy, and the like, and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, and the like. The power supply system with the battery cell and/or the battery and the like disclosed in the application can be used for forming the electric device, so that the electric device is convenient to provide electric drive.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1 according to some embodiments of the present disclosure. The vehicle 1 can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range-extended automobile and the like. The interior of the vehicle 1 is provided with a battery 10, and the battery 10 may be provided at the bottom or at the head or tail of the vehicle 1. The battery 10 may be used for power supply of the vehicle 1, and for example, the battery 10 may serve as an operation power source of the vehicle 1. The vehicle 1 may also include a motor 20 and a controller 30, the controller 30 being configured to control the battery 10 to power the motor 20, for example, for operational power requirements during start-up, navigation, and travel of the vehicle 1.
In some embodiments of the present application, the battery 10 may be used not only as an operating power source of the vehicle 1, but also as a driving power source of the vehicle 1, instead of or in part of fuel or natural gas, to provide driving power for the vehicle 1.
Fig. 2 illustrates a structural schematic diagram of a battery cell in an embodiment of the present application, fig. 3 illustrates a side sectional view of a top cover 120 in an embodiment of the present application, and fig. 4 illustrates an enlarged schematic diagram at a of fig. 3.
Referring to fig. 2, a battery case 100 according to an embodiment of the present application includes a bottom case 110, a top cover 120, and an absorption member 130. The bottom case 110 has a receiving cavity 111 and an opening 112 located at one side of the bottom case 110 and communicating with the receiving cavity 111, and the top cover 120 is covered on the opening side of the bottom case 110 to be able to close the opening 112.
Referring to fig. 3, the absorption assembly 130 is disposed in the top cover 120, referring to fig. 4, the top cover 120 is provided with an air guide 125 for allowing the gas in the accommodating cavity 111 to flow to the absorption assembly 130, and the absorption assembly 130 is used for absorbing the reaction gas generated by the electrochemical reaction in the accommodating cavity 111.
The receiving cavity 111 is used for receiving the electrolyte and the electrode assembly 200, and the "reaction gas generated by the electrochemical reaction in the receiving cavity 111" refers to the electrolyte in the receiving cavity 111 and the reaction gas generated by the electrochemical reaction of the electrode assembly 200. The reaction gas includes carbon dioxide, hydrogen, methane, and the like.
The absorption member 130 refers to a member capable of absorbing the reaction gas generated by the electrochemical reaction in the accommodating chamber 111, and may include a solid capable of absorbing the reaction gas, such as a solid that reacts with the reaction gas; it may also include a liquid capable of absorbing the reactive gas, such as a liquid that reacts with the reactive gas; and may also include a gas capable of absorbing a reactant gas, such as a gas that reacts with a reactant gas.
The solid for absorbing the reaction gas can be a porous structure, and the porous structure can be one or more of activated carbon, zeolite, porous silicon oxide and porous macromolecules. The solid absorbing the reaction gas may also be a substance capable of reacting with the reaction gas, such as the reaction gas including carbon dioxide, hydrogen, methane, etc., and the solid absorbing the reaction gas may be one or more of hydroxides and metal oxides. The hydroxide includes sodium hydroxide, calcium hydroxide and the like, and the metal oxide includes calcium oxide, copper oxide and the like.
The air guide 125 is a member capable of allowing the air in the receiving chamber 111 to flow to the absorbent assembly 130, and may be a hole provided in the top cover 120.
The liquid level of the electrolyte in the accommodating cavity 111 is usually lower than the opening 112, and then, the top cover 120 sealed at the opening 112 can be higher than the liquid level of the electrolyte in the accommodating cavity 111, and in combination with the absorption assembly 130 disposed in the top cover 120 and used for absorbing the reaction gas generated by the electrochemical reaction in the accommodating cavity 111, it can be understood that the height of the absorption assembly 130 can be higher than the liquid level of the electrolyte in the accommodating cavity 111, so that the absorption assembly 130 can be prevented from contacting the electrolyte in the accommodating cavity 111 and being wetted by the electrolyte in the accommodating cavity 111, and the absorption assembly 130 can be used for effectively absorbing the reaction gas generated by the electrochemical reaction in the accommodating cavity 111, thereby effectively preventing the gas pressure in the inner space of the battery 10 from being too high, improving the safety of the battery 10, and reducing the potential safety hazard of the battery 10.
In some embodiments, the solid that absorbs the reactant gas is sodium hydroxide, which can absorb carbon dioxide.
In other embodiments, the solid that absorbs the reactant gas is calcium hydroxide, which can absorb carbon dioxide.
In still other embodiments, the reactant gas absorbing solid is calcium oxide, which absorbs carbon dioxide.
In still other embodiments, the solid that absorbs the reactant gas is copper oxide, which absorbs methane and hydrogen.
In some embodiments, the top cover 120 includes a cover body 121 and an electrical isolation member 122 disposed on the cover body 121 and facing the opening side of the bottom case 110, the cover body 121 covers the opening side of the bottom case 110, a receiving groove 123 for receiving the absorption element 130 is disposed between the electrical isolation member 122 and the cover body 121, and an air guide 125 is disposed on the electrical isolation member 122 and communicates the receiving groove 123 and the receiving cavity 111.
The receiving groove 123 is located between the electrical isolation member 122 and the cover body 121, and may be a portion of the electrical isolation member 122 recessed along a direction of the cover body 121 toward the bottom shell 110, so as to receive the electrical isolation memberA receiving groove 123 is formed between the cover body 121 and the cover body 122. In the embodiment shown in fig. 3 and 4, the direction along the cover body 121 toward the bottom case 110 is parallel to the thickness direction F of the cover body 121 Is thick and thick 。
The receiving groove 123 is located between the electrical isolation member 122 and the cover body 121, the receiving groove 123 is used for receiving the absorbing element 130, the air guide portion 125 is disposed on the electrical isolation member 122, and the air guide portion 125 is communicated with the receiving groove 123 and the receiving cavity 111, it can be inferred that the reaction gas generated by the electrochemical reaction in the receiving cavity 111 can flow into the receiving groove 123 through the air guide portion 125 and can contact with the absorbing element 130 in the receiving groove 123, so that the reaction gas generated by the electrochemical reaction in the receiving cavity 111 can be absorbed by the absorbing element 130.
In some embodiments, the receiving groove 123 has a bottom wall 1232 spaced apart from and opposite to the cover body 121, and the air guide 125 is configured as a through hole penetrating the bottom wall 1232 of the receiving groove 123.
The air guide 125 is configured as a through hole penetrating through the bottom wall 1232 of the receiving groove 123, through which the receiving groove 123 and the receiving chamber 111 can be communicated, so that the reaction gas generated by the electrochemical reaction in the receiving chamber 111 can be absorbed by the absorption member 130.
In some embodiments, referring to fig. 5 and fig. 6, at least one separating member 124 is disposed in the accommodating groove 123, the at least one separating member 124 is used for separating the accommodating groove 123 into at least two sub-accommodating grooves 1231 which are not communicated with each other, and an absorbing assembly 130 is disposed in each sub-accommodating groove 1231.
The absorption elements 130 in all the sub-receiving slots 1231 are spaced from each other and do not interfere with each other, which is favorable for the absorption of the reaction gas generated by the electrochemical reaction in the receiving cavity 111 by the plurality of absorption elements 130.
In some embodiments, the material of the absorbing member 130 in at least two sub-receiving grooves 1231 is different to absorb different reaction gases.
The materials of the absorbent assemblies 130 in all the sub-receiving grooves 1231 may be different from each other, or the materials of the absorbent assemblies 130 in at least two sub-receiving grooves 1231 in all the sub-receiving grooves 1231 may be different from each other, which is not particularly limited herein.
For example, the absorbent assembly 130 in one of the sub-tanks 1231 is made of calcium hydroxide to absorb carbon dioxide, and the absorbent assembly 130 in the other sub-tank 1231 is made of copper oxide to absorb methane and hydrogen.
Thus, the absorbing members 130 having different materials can be positioned in the different sub-receiving grooves 1231, so that at least two absorbing members 130 having different materials can react with the corresponding reaction gas without interfering with each other, thereby improving the effect of gas absorption.
In some embodiments, referring to FIG. 6, the separating member 124 includes a first direction F 1 An extended first division bar 1241, and in a second direction F 2 And a second division rib 1242 extending and provided to intersect the first division rib 1241.
It can be understood that the opposite ends of the first dividing rib 1241 along the longitudinal direction thereof are connected to the receiving slots 123 along the first direction F 1 Opposite ends of the first division rib 1241 along the longitudinal direction thereof are respectively connected to the side wall 1233 of the accommodating groove 123 along the first direction F 1 Opposite ends of the second partition rib 1242 along the longitudinal direction thereof are respectively connected to the side wall 1233 of the accommodating groove 123 along the second direction F 2 The first and second partition ribs 1241 and 1242 may partition the receiving groove 123 into four sub receiving grooves 1231 that are not communicated with each other.
First direction F 1 Can be aligned with the second direction F 2 May be perpendicular to each other and all parallel to the top surface of the top cover 120.
The absorption members 130 of different materials may be respectively disposed in the four sub-receiving grooves 1231, so that the absorption members 130 may not interfere with each other when reacting with the corresponding reaction gas, thereby improving the effect of gas absorption. For example, the absorbent assembly 130 disposed in the four sub-housing grooves 1231 is made of sodium hydroxide, calcium oxide, and copper oxide. In addition, the first and second partition ribs 1241 and 1242 can improve the strength of the receiving groove 123, thereby improving the reliability of the absorbent assembly 130.
In some embodiments, referring to fig. 3, the electrical separator 122 includes a first portion 1221 and a second portion 1222 disposed around the first portion 1221, the receiving slot 123 is disposed between the first portion 1221 and the cover body 121, and the second portion 1222 is disposed with an abutting portion for abutting against the electrode assembly 200 located in the receiving cavity 111 (as can be understood in conjunction with fig. 2).
When the battery case 100 is assembled, the electrode assembly 200 can be placed in the accommodating cavity 111, and the top cover 120 can be covered on the opening side of the bottom case 110, so that the electrode assembly 200 in the accommodating cavity 111 can be abutted by the abutting portion, and it can be understood that the electrode assembly 200 can be limited between the bottom wall of the accommodating cavity 111 and the abutting portion of the second portion 1222 of the electrical separator 122, which is beneficial to improving the reliability of the battery 10.
In some embodiments, in the thickness direction of the top cover 120, the abutting portion of the second portion 1222 is closer to the bottom wall of the receiving cavity 111 than the receiving groove 123.
The liquid level of the electrolyte is usually substantially flush with or lower than the bottom of the contact portion, and it is understood that the housing groove 123 can be higher than the liquid level of the electrolyte, which is more favorable for the absorption module 130 to absorb the reaction gas generated by the electrochemical reaction in the housing cavity 111.
In some embodiments, the cap body 121 and the electrical isolator 122 are removably connected.
The cover body 121 and the electrical separator 122 may be snapped to each other, or may be detachably coupled by means of screws or the like.
Thus, the absorbing assembly 130 in the accommodating groove 123 can be conveniently replaced or taken in and out.
In some embodiments, referring to FIG. 7, absorbent assembly 130 comprises a gas-absorbing component 131 and a hydrophobic, gas-permeable membrane 132 that is wrapped around the outside of gas-absorbing component 131.
The gas absorbing member 131 refers to a member capable of absorbing the reaction gas, such as a solid capable of reacting with the reaction gas.
The hydrophobic gas permeable membrane 132 is a membrane through which gas can pass but liquid cannot pass, and the material of the hydrophobic gas permeable membrane 132 may be fluorinated ethylene propylene copolymer (FEP), polypropylene (PP), or the like.
Thus, the electrolyte cannot pass through the hydrophobic gas-permeable membrane 132, and the reaction gas can pass through the hydrophobic gas-permeable membrane 132, so that the reaction gas can contact the gas absorbing member 131 in the hydrophobic gas-permeable membrane 132 to absorb the reaction gas with the gas absorbing member 131.
In some embodiments, the absorption assembly 130 further comprises an adhesive layer 133, the adhesive layer 133 is disposed outside the hydrophobic air-permeable membrane 132, and the absorption assembly 130 can be adhered to the wall of the receiving groove 123, so as to fix the absorption assembly 130 in the receiving groove 123, thereby improving the reliability of the absorption assembly 130.
In some embodiments, gas absorbing component 131 is configured as a porous structure.
The gas absorbing member 131 has a porous structure, and thus the contact area between the gas absorbing member 131 and the reaction gas can be increased, thereby improving the absorption effect of the reaction gas.
In some embodiments, the porosity of the gas absorbing member 131 decreases gradually from the outside to the inside.
Thus, after the reaction gas reacts with the outer layer of the gas absorbing member 131, the reaction gas can enter the inner layer of the gas absorbing member 131 through the pores of the gas absorbing member 131, and then react with the inner layer of the gas absorbing member 131, so that the utilization rate of the gas absorbing member 131 is improved, and the reaction gas absorbing effect is improved.
In some embodiments, the gas absorbing component 131 comprises one of sodium hydroxide, calcium oxide, and copper oxide.
The carbon dioxide can be absorbed by sodium hydroxide, or the carbon dioxide can be absorbed by calcium oxide, or the methane and the hydrogen can be absorbed by copper oxide.
In some embodiments, the absorbent assembly 130 includes a reactant gas absorbing fluid and a hydrophobic, breathable membrane 132 that is wrapped outside the reactant gas absorbing fluid.
The reactant gas absorbing fluid is a fluid capable of reacting with the reactant gas.
The reaction gas in the accommodating chamber 111 can flow to the absorption member 130 through the gas guide 125, and this portion of the reaction gas can pass through the hydrophobic gas-permeable membrane 132 and come into contact with the reaction gas absorption fluid, and the two can react with each other to absorb the reaction gas.
In some embodiments, the reactant gas absorbing fluid is chlorine gas.
The reaction gas, such as methane, in the holding chamber 111 may be absorbed by chlorine gas.
In some embodiments, the battery housing 100 includes a bottom case 110, a top cover 120, and an absorbent assembly 130. The top cover 120 includes a cover body 121 and an electrical isolation member 122 disposed on the cover body 121 and facing the opening side of the bottom casing 110, the cover body 121 covers the opening side of the bottom casing 110, an accommodating groove 123 for accommodating the absorption assembly 130 is disposed between the electrical isolation member 122 and the cover body 121, and an air guide 125 is disposed on the electrical isolation member 122 and communicates the accommodating groove 123 with the accommodating cavity 111.
The reaction gas generated by the electrochemical reaction in the accommodating cavity 111 can flow into the accommodating groove 123 through the gas guide portion 125 and can contact with the absorbing component 130 in the accommodating groove 123, so that the reaction gas generated by the electrochemical reaction in the accommodating cavity 111 can be absorbed by the absorbing component 130, the excessive gas pressure in the internal space of the battery 10 can be effectively avoided, the safety of the battery 10 is improved, and the potential safety hazard of the battery 10 is reduced.
The battery cell provided by an embodiment of the present application includes the battery case 100 described above.
The battery 10 provided in an embodiment of the present application includes the battery cell described above.
An embodiment of the present application provides an electric device including the battery 10.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (17)
1. A battery case, comprising:
a bottom case (110) having an accommodation cavity (111) and an opening (112) located at one side of the bottom case (110) and communicating with the accommodation cavity (111);
a top cover (120) covering the opening side of the bottom case (110); and
the absorption assembly (130) is arranged in the top cover (120), and an air guide part (125) which can allow the air in the accommodating cavity (111) to flow to the absorption assembly (130) is arranged on the top cover (120);
wherein, the absorption component (130) is used for absorbing the reaction gas generated by the electrochemical reaction in the containing cavity (111).
2. The battery case according to claim 1, wherein the top cover (120) comprises a cover body (121) and an electrical separator (122) provided to the cover body (121) toward an open side of the bottom case (110);
the cover body (121) is arranged on the opening side of the bottom shell (110) in a covering manner, and an accommodating groove (123) for accommodating the absorption assembly (130) is formed between the electric isolating piece (122) and the cover body (121);
the air guide part (125) is arranged on the electric isolating piece (122) and is communicated with the containing groove (123) and the containing cavity (111).
3. The battery case according to claim 2, wherein the receiving groove (123) has a groove bottom wall (1232) disposed opposite to and spaced apart from the cover body (121);
the air guide (125) is configured as a through hole that penetrates a groove bottom wall (1232) of the receiving groove (123).
4. The battery case according to claim 2, wherein at least one partition member (124) is provided in the receiving groove (123), and the at least one partition member (124) is used for partitioning the receiving groove (123) into at least two sub receiving grooves (1231) which are not communicated with each other;
the absorbent assembly (130) is disposed in each sub-accommodation groove (1231).
5. The battery case according to claim 4, wherein the material of the absorbing member (130) in at least two of the sub-receiving grooves (1231) is different to absorb different reaction gases.
6. The battery case according to claim 4, wherein the partition member (124) comprises a first partition rib (1241) extending in a first direction, and a second partition rib (1242) extending in a second direction and disposed to intersect the first partition rib (1241);
the first direction and the second direction are perpendicular to each other and are both parallel to a top surface of the top cover (120).
7. The battery housing of claim 2, wherein the electrical separator (122) comprises a first portion (1221) and a second portion (1222) disposed around the first portion (1221);
the accommodating groove (123) is arranged between the first part (1221) and the cover body (121);
the second portion (1222) is provided with an abutment for abutting against an electrode assembly (200) located within the receiving cavity (111).
8. The battery case according to claim 2, wherein the cover body (121) and the electrical separator (122) are detachably connected.
9. The battery housing according to any one of claims 1 to 8, wherein the absorbent assembly (130) comprises a gas absorbent member (131) and a hydrophobic gas permeable membrane (132) wrapped outside the gas absorbent member (131).
10. The battery case according to claim 9, wherein the gas absorbing member (131) is configured as a porous structure.
11. The battery case according to claim 10, wherein the porosity of the gas absorbing member (131) is gradually decreased from the outside to the inside.
12. The battery case according to claim 9, wherein the gas absorbing member (131) comprises one of sodium hydroxide, calcium oxide, and copper oxide.
13. The battery housing according to any one of claims 1-8, wherein the absorbent assembly (130) comprises a reactant gas absorbing fluid and a hydrophobic gas permeable membrane (132) encasing the reactant gas absorbing fluid.
14. The battery housing of claim 13, wherein the reactant-absorbing fluid is chlorine gas.
15. A battery cell comprising the battery case according to any one of claims 1 to 14.
16. A battery comprising the cell of claim 15.
17. An electric device comprising the battery of claim 16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222657199.8U CN218274744U (en) | 2022-10-10 | 2022-10-10 | Battery case, battery monomer, battery and power consumption device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222657199.8U CN218274744U (en) | 2022-10-10 | 2022-10-10 | Battery case, battery monomer, battery and power consumption device |
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| Publication Number | Publication Date |
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| CN218274744U true CN218274744U (en) | 2023-01-10 |
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| CN202222657199.8U Active CN218274744U (en) | 2022-10-10 | 2022-10-10 | Battery case, battery monomer, battery and power consumption device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116387714A (en) * | 2023-06-05 | 2023-07-04 | 厦门海辰储能科技股份有限公司 | End cover assembly, energy storage device and electric equipment |
| CN116417697A (en) * | 2023-06-05 | 2023-07-11 | 厦门海辰储能科技股份有限公司 | Energy storage device and electric equipment |
-
2022
- 2022-10-10 CN CN202222657199.8U patent/CN218274744U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116387714A (en) * | 2023-06-05 | 2023-07-04 | 厦门海辰储能科技股份有限公司 | End cover assembly, energy storage device and electric equipment |
| CN116417697A (en) * | 2023-06-05 | 2023-07-11 | 厦门海辰储能科技股份有限公司 | Energy storage device and electric equipment |
| CN116417697B (en) * | 2023-06-05 | 2023-08-08 | 厦门海辰储能科技股份有限公司 | Energy storage device and electric equipment |
| CN116387714B (en) * | 2023-06-05 | 2023-08-25 | 厦门海辰储能科技股份有限公司 | End cover assembly, energy storage device and electric equipment |
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