Battery shell, battery and electric equipment

Abstract

The utility model relates to the technical field of batteries, in particular to a battery shell, a battery and electric equipment. An accommodating cavity is formed in the shell; the liquid supplementing assembly comprises a first separation part, a gas guide part and a liquid supplementing part; the first partition part is arranged in the accommodating cavity and divides the accommodating cavity into a first accommodating cavity and a second accommodating cavity, the first accommodating cavity is used for accommodating a battery cell, a first channel and a liquid outlet channel are arranged on the first partition part, the first channel is communicated with the first accommodating cavity and the second accommodating cavity, and the liquid outlet channel is communicated with the first accommodating cavity and the second accommodating cavity; the air guide part is arranged in the second containing cavity and divides the second containing cavity into a first air channel cavity and a first containing cavity, a second channel and a third channel are formed in the air guide part, the second channel communicates with the first channel and the first air channel cavity, and the third channel communicates with the first air channel cavity and the first containing cavity; and electrolyte is contained in the liquid supplementing component, and the liquid supplementing component is arranged in the first containing cavity and covers the liquid outlet channel and the third channel. The utility model can effectively prolong the cycle life and improve the safety performance of the battery.

Description

Technical Field

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

[0002] Lithium-ion batteries stand out among chemical energy storage devices due to their high energy density, no memory effect, long cycle life, and environmental friendliness, and are widely used in electric vehicles, computers, communications, and other fields. As the demand for lithium-ion batteries continues to increase, people are paying more and more attention to the performance of lithium-ion batteries.

[0003] During the recycling process, the shrinkage of the lithium-ion battery diaphragm and the consumption of the electrolyte will cause thermal runaway, resulting in safety hazards. For this reason, in the prior art, materials such as mica are provided as inner vests to isolate heat diffusion.

[0004] However, the setting of the inner vest not only increases the cost, but also makes it difficult to replenish the electrolyte when the electrolyte is insufficient in the later stage of battery cycle, thereby affecting the battery life. Utility Model Content

[0005] To this end, the technical problem to be solved by the utility model is to overcome the difficulty in replenishing electrolyte and the reduction of service life in the later stage of battery cycle use, provide a battery housing, a battery and an electrical device, and set a liquid replenishing component to replenish the electrolyte for the battery cell, thereby effectively improving the battery cycle life and safety performance.

[0006] In the first aspect, the utility model provides a battery shell, including a shell, a accommodating chamber formed in the shell; a fluid replenishing component, the fluid replenishing component including a first partition component, an air guide component and a fluid replenishing component; the first partition component is arranged in the accommodating chamber, and divides the accommodating chamber into a first accommodating chamber and a second accommodating chamber, the first accommodating chamber is used to accommodate battery cells, the first partition component is provided with a first channel and a liquid outlet channel, the first channel respectively connects the first accommodating chamber and the second accommodating chamber, and the liquid outlet channel respectively connects the first accommodating chamber and the second accommodating chamber; the air guide component is arranged in the second accommodating chamber, and divides the second accommodating chamber into a first airway cavity and a first placement cavity, the air guide component is provided with a second channel and a third channel, the second channel respectively connects the first channel and the first airway cavity, and the third channel respectively connects the first airway cavity and the first placement cavity; the fluid replenishing component is filled with electrolyte, the fluid replenishing component is arranged in the first placement cavity, and the fluid replenishing component covers the liquid outlet channel and the third channel respectively.

[0007] In one embodiment of the utility model, the shell includes a shell body and a top cover, the shell body has a cavity with an opening at one end, the top cover is connected to the shell body and blocks the opening of the cavity to form the accommodating cavity; wherein, there is a gap between the battery cell and the top cover, the gap is connected to the first channel, and the first channel is arranged opposite to the gap.

[0008] In an embodiment of the present invention, a fourth channel is provided on the fluid replenishing component, and the fourth channel is connected to the first channel and the second channel respectively.

[0009] In one embodiment of the present utility model, the fluid infusion component also includes a second partition component, which is arranged in the first placement cavity, and the second partition component divides the first placement cavity into a second placement cavity and a second airway cavity, the second placement cavity is respectively connected to the liquid outlet channel and the third channel, the second airway cavity is respectively connected to the first channel and the second channel, and the fluid infusion component is arranged in the second placement cavity.

[0010] In one embodiment of the present invention, the liquid outlet channel is provided in plurality; or / and the third channel is provided in plurality.

[0011] In one embodiment of the present invention, the fluid replenishing assembly is detachably arranged in the accommodating cavity.

[0012] In one embodiment of the present invention, a plurality of the fluid replenishing components are provided.

[0013] In an embodiment of the present utility model, the shell is configured as a rectangular parallelepiped structure; two fluid replenishment components are provided, and the two fluid replenishment components are respectively arranged on both sides of the accommodating cavity along the length direction of the shell.

[0014] In a second aspect, the utility model further provides a battery, comprising a battery cell and a battery casing as described in any one of the above, wherein the battery cell is arranged in the first accommodating cavity.

[0015] In a third aspect, the utility model further provides an electrical device, comprising any one of the batteries described above.

[0016] The above technical solution of the utility model has the following beneficial effects compared with the prior art:

[0017] The battery housing of the utility model is based on the characteristic that the battery core will generate gas during operation, and a liquid replenishment component is arranged in the housing. The gas generated by the battery core during operation is guided by the partition component and the gas guide component, so that the gas squeezes the liquid replenishment component and squeezes out the electrolyte to achieve liquid replenishment for the battery core. It can effectively ensure that the battery core has sufficient electrolyte, improve the overall cycle life of the battery, increase the recycling rate of the battery, and improve the safety performance of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to the specific embodiments of the utility model in combination with the accompanying drawings, wherein:

[0019] Figure 1 This is a schematic diagram of the structure of the battery housing in a preferred embodiment of the utility model;

[0020] Figure 2 This is a schematic cross-sectional view of a battery housing in a preferred embodiment of the utility model;

[0021] Figure 3 This is one of the partial cross-sectional structural schematic diagrams of the battery housing in the preferred embodiment of the utility model;

[0022] Figure 4 This is the second schematic diagram of the partial cross-sectional structure of the battery housing in the preferred embodiment of the utility model;

[0023] Figure 5 This is one of the structural schematic diagrams of the first partition component in the preferred embodiment of the utility model;

[0024] Figure 6 This is the second structural diagram of the first partition component in the preferred embodiment of the utility model;

[0025] Figure 7 This is one of the structural schematic diagrams of the air guide component in the preferred embodiment of the utility model;

[0026] Figure 8 This is the second structural schematic diagram of the air guide component in the preferred embodiment of the utility model;

[0027] Fig. 9 This is a schematic diagram of the structure of the liquid replenishing component in the preferred embodiment of the utility model;

[0028] Fig.10 This is the third schematic diagram of the partial cross-sectional structure of the battery housing in the preferred embodiment of the utility model;

[0029] Fig.11 This is a fourth schematic diagram of a partial cross-sectional structure of a battery housing in a preferred embodiment of the utility model;

[0030] Fig.12 It is a schematic diagram of a partial cross-sectional structure of a battery in a preferred embodiment of the utility model.

[0031] Explanation of the reference numerals in the specification: 10. shell; 11. shell body; 111. cavity; 12. top cover; 13. first accommodating cavity; 14. second accommodating cavity; 141. first airway cavity; 142. first placement cavity; 1421. second placement cavity; 1422. second airway cavity; 21. first partition component; 211. first channel; 212. liquid outlet channel; 22. air guide component; 221. second channel; 222. third channel; 23. liquid replenishing component; 231. fourth channel; 24. second partition component; 30. battery cell; 31. gap. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0033] The utility model discloses a battery casing, comprising a casing 10 and a liquid replenishing component.

[0034] The housing 10 is used to accommodate and protect the corresponding components; Figure 1 and Figure 2 As shown, a housing 10 is formed with a receiving cavity, and each component is arranged in the receiving cavity. Those skilled in the art can set the specific shape, size, material, etc. of the housing 10 according to actual needs, and will not be described in detail.

[0035] The refilling assembly is used to refill the battery cell 30; refer to Figure 3 and Figure 4 As shown, the fluid replenishment component includes a first partition component 21, an air guide component 22 and a fluid replenishment component 23.

[0036] Reference Figure 5 As shown, the first partition member 21 is arranged in the accommodating chamber, and divides the accommodating chamber into a first accommodating chamber 13 and a second accommodating chamber 14; the first accommodating chamber 13 is used to accommodate the battery cell 30. The first partition member 21 is provided with a first channel 211 and a liquid outlet channel 212; the first channel 211 is connected to the first accommodating chamber 13 and the second accommodating chamber 14 respectively, and the first channel 211 is used to allow the gas in the first accommodating chamber 13 to flow to the second accommodating chamber 14; the liquid outlet channel 212 is connected to the first accommodating chamber 13 and the second accommodating chamber 14 respectively, and the liquid outlet channel 212 is used to allow the electrolyte to flow to the first accommodating chamber 13 to achieve fluid replenishment. Those skilled in the art can set the specific sizes of the first channel 211 and the liquid outlet channel 212 according to actual needs, and no further description is given.

[0037] Reference Figure 7As shown, the air guide component 22 is arranged in the second accommodating chamber 14, and the second accommodating chamber 14 is divided into a first airway chamber 141 and a first placement chamber 142; the first airway chamber 141 is used to guide the gas flowing in from the first channel 211. The air guide component 22 is provided with a second channel 221 and a third channel 222; the second channel 221 is connected to the first channel 211 and the first airway chamber 141 respectively, so that after the gas flows out from the first channel 211, it flows through the second channel 221 and enters the first airway chamber 141. The third channel 222 is connected to the first airway chamber 141 and the first placement chamber 142 respectively, so that the gas in the first airway chamber 141 applies a force to the liquid replenishing component 23 in the first placement chamber 142, thereby squeezing out the electrolyte and achieving liquid replenishment. Those skilled in the art can set the specific sizes of the first airway chamber 141, the first placement chamber 142, the second channel 221 and the third channel 222 according to actual needs, and will not be repeated.

[0038] The liquid replenishing component 23 is filled with electrolyte, and the liquid replenishing component 23 is arranged in the first placement cavity 142. The liquid replenishing component 23 covers the liquid outlet channel 212 and the third channel 222 respectively to avoid the two channels being directly connected and affecting the gas squeezing the liquid replenishing component 23, thereby affecting the liquid replenishment. In actual use, the gas in the first gas channel cavity 141 flows through the third channel 222 and squeezes the liquid replenishing component 23, so that the electrolyte filled in the liquid replenishing component 23 flows from the liquid outlet channel 212 into the first accommodating cavity 13 to replenish the electrolyte to the battery cell 30. It should be noted that the liquid replenishing component 23 can be pre-filled with electrolyte and then installed, or it can be filled with electrolyte after the installation is completed.

[0039] Preferably, the materials of the first partition component 21 and the air guide component 22 are set to any one of PVDF (polyvinyl idene difluoride), PEO (polyethylene oxide), and PEA (amino-terminated polyoxypropylene). Preferably, the material of the liquid replenishing component 23 is set to the foam sponge material silicon dioxide.

[0040] In actual use, the battery cell 30 disposed in the first accommodating chamber 13 will generate gas during operation. The gas flows through the first channel 211 and the second channel 221 in sequence and enters the first gas channel cavity 141. As the gas continues to increase, the gas pressure rises, causing the gas to flow through the third channel 222 and squeeze the liquid replenishing component 23. The liquid replenishing component 23 is affected by the force of the gas, and the electrolyte filled therein flows from the liquid outlet channel 212 into the first accommodating chamber 13 to replenish the electrolyte for the battery cell 30. Therefore, it can effectively ensure that the battery cell 30 has sufficient electrolyte, ensure that its internal resistance is at a low level, prevent the problem of battery capacity reduction caused by the inability of some active substances to obtain electrolyte, improve the overall cycle life of the battery, and increase the recycling rate of the battery; in addition, it can also prevent the active substances from entering the diaphragm of the battery cell 30, thereby preventing the occurrence of short circuit problems and effectively improving the safety performance of the battery.

[0041] The battery housing of the utility model is based on the characteristic that the battery cell 30 generates gas during operation, and a liquid replenishing component is arranged in the housing 10. The gas generated by the battery cell 30 during operation is guided by the partition component and the gas guide component 22, so that the gas squeezes the liquid replenishing component 23 and squeezes out the electrolyte to achieve liquid replenishment for the battery cell 30. It can effectively ensure that the battery cell 30 has sufficient electrolyte, improve the overall cycle life of the battery, increase the recycling rate of the battery, and improve the safety performance of the battery.

[0042] Reference Figure 1 and Fig.12 As shown, in some embodiments of the battery housing described in the utility model, the housing 10 includes a shell body 11 and a top cover 12. The shell body 11 has a cavity 111 with an opening at one end, and the top cover 12 is connected to the shell body 11 and blocks the opening of the cavity 111 to form a receiving cavity. Those skilled in the art can set the specific connection method between the top cover 12 and the shell body 11 according to actual needs, such as welding, clamping, etc., which will not be repeated. When the battery cell 30 is arranged in the receiving cavity, there is a gap 31 between the battery cell 30 and the top cover 12 for the pole ear to bend, and the gap 31 is connected to the first channel 211, and the first channel 211 is arranged opposite to the gap 31. By setting this structure, it is possible to avoid other components blocking the first channel 211, ensure that the gas can pass through the first channel 211 more easily, and then achieve fluid replenishment, avoid the problem of channel blockage and inability to replenish fluid, and improve the safety performance of the battery. Those skilled in the art can set the specific size of the gap 31 according to actual needs, which will not be repeated.

[0043] Reference Figure 3 and Fig. 9As shown, in some embodiments of the battery housing described in the utility model, a fourth channel 231 is provided on the liquid replenishing component 23, and the fourth channel 231 is connected to the first channel 211 and the second channel 221 respectively. Since the liquid replenishing component 23 is provided with the fourth channel 231 and can realize the connection between the first channel 211 and the second channel 221, it is no longer necessary to set up other components and structures in the first placement cavity 142, so that a larger volume of liquid replenishing component 23 can be placed. Under the condition that other factors are the same, as the volume increases, the amount of electrolyte that can be filled in the liquid replenishing component 23 also increases. Therefore, by setting the liquid replenishing component 23 of this structure, the overall cycle life of the battery can be further improved and the recycling rate of the battery can be increased. Those skilled in the art can set the specific size of the fourth channel 231 according to actual needs, and will not repeat them.

[0044] In this embodiment, the gas flows through the first channel 211, the fourth channel 231 and the second channel 221 in sequence and enters the first gas channel cavity 141. As the gas pressure rises, the gas flows through the third channel 222 and squeezes the liquid replenishing component 23. The liquid replenishing component 23 is affected by the force of the gas, and the electrolyte filled in it flows from the liquid outlet channel 212 into the first accommodating cavity 13 to replenish the electrolyte of the battery cell 30.

[0045] Reference Fig.10 and Fig.11 As shown, in some embodiments of the battery housing of the present invention, the refilling assembly further includes a second partitioning component 24. The second partitioning component 24 is disposed in the first placement cavity 142, and the second partitioning component 24 divides the first placement cavity 142 into a second placement cavity 1421 and a second airway cavity 1422; the second airway cavity 1422 is connected to the first channel 211 and the second channel 221 respectively. The second placement cavity 1421 is connected to the liquid outlet channel 212 and the third channel 222 respectively, and the refilling component 23 is disposed in the second placement cavity 1421. By setting this structure, the sealing of each channel and the airway cavity can be effectively ensured, so as to better guide the gas, and then the refilling is achieved by squeezing the refilling component 23 by the gas. Those skilled in the art can set the specific installation method of the second partitioning component 24 according to actual needs, for example, connecting it to the first partitioning component 21, connecting it to the air guide component 22, or connecting it to the first partitioning component 21 and the air guide component 22 at the same time, etc.; the connection method is such as snap connection, welding, etc., which will not be repeated.

[0046] In this embodiment, the gas generated by the battery cell 30 flows through the first channel 211, the second airway cavity 1422 and the second channel 221 in sequence into the first airway cavity 141. As the air pressure rises, the gas in the first airway cavity 141 enters the third channel 222 and squeezes the liquid replenishing component 23 disposed in the second placement cavity 1421, so that the electrolyte filled in the liquid replenishing component 23 flows from the liquid outlet channel 212 into the first accommodating cavity 13, thereby replenishing the electrolyte in the battery cell 30.

[0047] Reference Figure 6 and Figure 8 As shown, in some embodiments of the battery housing described in the utility model, a plurality of liquid outlet channels 212 are provided; or / and a plurality of third channels 222 are provided. Compared with only one liquid outlet channel 212 or one third channel 222, by setting this structure, the relative contact area between the liquid replenishment component 23 and the first partition component 21 can be increased, or / and the relative contact area between the liquid replenishment component 23 and the gas guide component 22 can be increased, thereby improving the structural stability of the liquid replenishment component and preventing the liquid replenishment component from being misplaced, falling off, and other problems. Preferably, the liquid outlet channel 212 and the third channel 222 are both provided with a plurality to obtain the best effect. Those skilled in the art can set the specific number of the liquid outlet channel 212 and the third channel 222 according to actual needs, such as two, three, four, etc., and can also set their specific shape, size, and arrangement according to actual needs, such as square, strip, round, oval, etc., which will not be repeated.

[0048] In some embodiments of the battery housing described in the utility model, the refilling assembly can be detachably arranged in the accommodating cavity. Specifically, the refilling component 23 is first sandwiched between the first partition component 21 and the air guide component 22, and then the refilling component 23, the first partition component 21 and the air guide component 22 are connected as one, and finally the refilling assembly that has been connected as one is arranged in the accommodating cavity. The refilling assembly can be connected to the housing by bolt connection or snap connection, which is easy to install. Of course, the refilling assembly can also be fixedly connected to the housing.

[0049] Reference Figure 2 As shown, in some embodiments, the battery housing of the utility model is provided with multiple refilling assemblies. By providing multiple refilling assemblies, more refilling components 23 can be filled with more electrolyte, increasing the amount of electrolyte that can be replenished when the battery cell 30 is working, which can further improve the overall cycle life of the battery, increase the battery recycling rate, and improve the battery safety performance.

[0050] Further, see Figure 2As shown, in some embodiments of the battery case of the present invention, the case 10 is set as a rectangular parallelepiped structure; two refilling assemblies are provided, and the two refilling assemblies are respectively arranged on both sides of the accommodating cavity along the length direction of the case 10. By setting this structure, the two refilling assemblies can be targeted to refill the corners of the square battery cell 30, thereby further improving the overall cycle life of the battery, increasing the battery recycling rate, and improving the battery safety performance.

[0051] The utility model discloses a battery, including a battery core 30 and a battery housing described in any one of the above embodiments; the battery core 30 is arranged in the first accommodation cavity 13. Since the battery of the utility model includes the battery housing described in the above embodiments, the advantages thereof are also possessed by the battery, and will not be described again.

[0052] The utility model discloses an electric device, including the battery described in any one of the above embodiments. Since the electric device described in the utility model includes the battery described in the above embodiments, the advantages thereof are also possessed by the electric device, and will not be described again. Since the main design point of the utility model is the battery housing, other structures of the electric device, such as the electrical connection part and the mechanical structure part of the electric device, will not be described again.

[0053] Electrical equipment may be automobiles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, electric tools, etc. Automobiles may be fuel vehicles, gas vehicles, or new energy vehicles, and new energy vehicles may be pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc.; spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc.; electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc.; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. The embodiments of the present invention do not impose any special restrictions on the above-mentioned electrical equipment.

[0054] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. A battery housing, characterized in that: include: A housing (10), wherein a receiving cavity is formed in the housing (10); A fluid replenishment component, the fluid replenishment component comprising a first partition component (21), an air guide component (22) and a fluid replenishment component (23); The first partition component (21) is arranged in the accommodating cavity and divides the accommodating cavity into a first accommodating cavity (13) and a second accommodating cavity (14); the first accommodating cavity (13) is used to accommodate the battery cell (30); the first partition component (21) is provided with a first channel (211) and a liquid outlet channel (212); the first channel (211) is connected to the first accommodating cavity (13) and the second accommodating cavity (14) respectively; and the liquid outlet channel (212) is connected to the first accommodating cavity (13) and the second accommodating cavity (14) respectively; The air guide component (22) is arranged in the second accommodating cavity (14) and divides the second accommodating cavity (14) into a first airway cavity (141) and a first placement cavity (142); a second channel (221) and a third channel (222) are provided on the air guide component (22); the second channel (221) is connected to the first channel (211) and the first airway cavity (141) respectively, and the third channel (222) is connected to the first airway cavity (141) and the first placement cavity (142) respectively; The liquid replenishing component (23) is filled with electrolyte, the liquid replenishing component (23) is arranged in the first placement cavity (142), and the liquid replenishing component (23) covers the liquid outlet channel (212) and the third channel (222) respectively.

2. The battery housing according to claim 1, characterized in that: The shell (10) comprises a shell body (11) and a top cover (12); the shell body (11) has a cavity (111) with an opening at one end; the top cover (12) is connected to the shell body (11) and blocks the opening of the cavity (111) to form the accommodating cavity; wherein a gap (31) is provided between the battery cell (30) and the top cover (12); the gap (31) is connected to the first channel (211), and the first channel (211) is arranged opposite to the gap (31).

3. The battery housing according to claim 1, characterized in that: The liquid replenishing component (23) is provided with a fourth channel (231), and the fourth channel (231) is connected to the first channel (211) and the second channel (221) respectively.

4. The battery housing according to claim 1, characterized in that: The fluid infusion component also includes a second partition component (24), the second partition component (24) is arranged in the first placement cavity (142), the second partition component (24) divides the first placement cavity (142) into a second placement cavity (1421) and a second airway cavity (1422), the second placement cavity (1421) is respectively connected to the liquid outlet channel (212) and the third channel (222), the second airway cavity (1422) is respectively connected to the first channel (211) and the second channel (221), and the fluid infusion component (23) is arranged in the second placement cavity (1421).

5. The battery housing according to claim 1, characterized in that: The liquid outlet channel (212) is provided with a plurality; or / and The third channel (222) is provided in plurality.

6. The battery housing according to claim 1, characterized in that: The fluid replenishing assembly is detachably arranged in the accommodating cavity.

7. The battery casing according to any one of claims 1 to 6, characterized in that: The fluid replenishing components are provided in plurality.

8. The battery casing according to claim 7, characterized in that: The shell (10) is configured as a rectangular parallelepiped structure; two fluid replenishment components are provided, and the two fluid replenishment components are respectively arranged on both sides of the accommodating cavity along the length direction of the shell (10).

9. A battery, characterized in that: It comprises a battery cell (30) and a battery casing according to any one of claims 1 to 8, wherein the battery cell (30) is arranged in the first accommodating cavity (13).

10. An electrical device, characterized in that: Comprising the battery as claimed in claim 9.

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