Battery cell assembly and battery

Abstract

The utility model discloses a battery cell assembly and a battery. The battery cell assembly comprises a battery cell main body, the liquid storage part is arranged on the battery cell main body, the liquid storage part is provided with a liquid storage space, the liquid storage space is used for storing an electrolyte, and the electrolyte in the liquid storage space is configured to flow into the battery cell main body to participate in a battery reaction. According to the battery cell assembly disclosed by the utility model, during the use process of the battery cell main body, the loss of the electrolyte can be generated, and the electrolyte in the liquid storage space of the liquid storage part can flow into the battery cell main body to participate in the battery reaction, so that liquid supplementation is realized, the service life of the battery cell assembly is prolonged, and the performance of the battery cell assembly is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a cell assembly and a battery. Background Technology

[0002] Whether it's a wound cell or a laminated cell, both require an electrolyte to transport ions during operation. However, the electrolyte is lost during the use of the cell. If too much electrolyte is lost, it will affect the transport of ions and cause the cell performance to deteriorate. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a battery cell assembly that can improve the problem of performance degradation caused by excessive electrolyte loss.

[0004] This utility model also proposes a battery having the above-mentioned cell assembly.

[0005] A battery cell assembly according to a first aspect of the present invention includes: a battery cell body; and a liquid storage device disposed on the battery cell body. The liquid storage device has a liquid storage space, wherein the liquid storage space is used to store electrolyte, and the electrolyte in the liquid storage space is configured to flow into the interior of the battery cell body to participate in the battery reaction.

[0006] The battery cell assembly according to the embodiments of this utility model has at least the following beneficial effects:

[0007] In the battery cell assembly of this utility model, the battery cell body will experience electrolyte loss during use, while the electrolyte in the storage space of the storage device can flow into the interior of the battery cell body to participate in the battery reaction, thereby achieving electrolyte replenishment and improving the service life and performance of the battery cell assembly.

[0008] According to some embodiments of the present invention, the liquid storage component includes a bonding wall that is attached to the main body of the battery cell and a non-bonding wall that is not in contact with the main body of the battery cell, and the liquid storage space extends through at least the non-bonding wall.

[0009] According to some embodiments of the present invention, the liquid storage component is stacked on the battery cell body, and the stacking direction of the liquid storage component and the battery cell body is defined as a preset direction. The liquid storage component has a first sidewall and a second sidewall arranged along the preset direction, and an outer peripheral wall connecting the edge of the first sidewall and the edge of the second sidewall.

[0010] The fitted wall includes the first sidewall, the non-fitted wall includes the second sidewall and the outer peripheral wall, and the liquid storage space penetrates at least one of the second sidewall and the outer peripheral wall.

[0011] According to some embodiments of the present invention, the liquid storage space includes a plurality of main liquid storage areas spaced apart, and an auxiliary liquid storage channel connecting the plurality of main liquid storage areas. The main liquid storage areas penetrate the second side wall, the auxiliary liquid storage channel penetrates the second side wall and / or the auxiliary liquid storage channel penetrates the outer peripheral wall.

[0012] The main liquid storage area may or may not penetrate the first sidewall, and the auxiliary liquid storage channel may or may not penetrate the first sidewall.

[0013] According to some embodiments of the present invention, the liquid storage component has a first sidewall and a second sidewall disposed opposite to each other, and an outer peripheral wall connecting the edge of the first sidewall and the edge of the second sidewall.

[0014] The bonding wall includes at least the first sidewall and the second sidewall, the non-bonding wall includes at least a portion of the outer peripheral wall, and the liquid storage space extends at least through the portion of the outer peripheral wall that is not bonded to the battery cell body.

[0015] According to some embodiments of the present invention, the liquid storage space includes a plurality of main liquid storage areas spaced apart, and an auxiliary liquid storage channel connecting the plurality of main liquid storage areas, wherein the auxiliary liquid storage channel passes through the outer peripheral wall at a position not in contact with the battery cell body;

[0016] The main liquid storage area may or may not penetrate the first sidewall, and the main liquid storage area may or may not penetrate the second sidewall; the auxiliary liquid storage channel may or may not penetrate the first sidewall, and the auxiliary liquid storage channel may or may not penetrate the second sidewall.

[0017] According to some embodiments of the present invention, the liquid storage space includes a liquid storage cavity formed inside the liquid storage component and a channel communicating with the liquid storage cavity, the channel penetrating the non-adherent wall.

[0018] According to some embodiments of this utility model, the main body of the battery cell is a stacked battery cell, and the liquid storage device is stacked with the stacked battery cell; or...

[0019] The main body of the battery cell is a wound battery cell with a through channel. The liquid storage device includes a first liquid storage device and a second liquid storage device. The first liquid storage device is disposed on the outer surface of the wound battery cell, and the second liquid storage device passes through the through channel.

[0020] According to some embodiments of this utility model, the liquid storage component is made of a thermally conductive material, and the liquid storage component is thermally connected with the battery cell body.

[0021] The battery according to a second aspect of the present invention includes the cell assembly described above.

[0022] The battery according to the embodiments of the present invention has at least the following beneficial effects:

[0023] The battery of this utility model has the cell assembly of the above embodiment. In the cell assembly, the cell body will lose electrolyte during use, and the electrolyte in the storage space of the liquid storage device can flow into the interior of the cell body to participate in the battery reaction, thereby achieving liquid replenishment and improving the service life and performance of the cell assembly.

[0024] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0026] Figure 1 This is a schematic diagram of the structure of a battery cell assembly according to an embodiment of the present invention;

[0027] Figure 2 for Figure 1 A structural schematic diagram of the figure shown from another perspective;

[0028] Figure 3 This is a schematic diagram of the structure of a liquid storage component according to an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the liquid storage component according to another embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the liquid storage component according to another embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the structure of the liquid storage component according to another embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of the structure of a battery cell assembly according to another embodiment of the present invention.

[0033] Icon labels:

[0034] 100. Battery cell body; 110. Winded battery cell; 120. Laminated battery cell;

[0035] 200, Liquid storage component; 200a, Second sidewall; 200b, Outer peripheral wall; 201, Liquid storage space; 2011, Main liquid storage area; 2012, Auxiliary liquid storage flow channel; 2012a, First flow channel; 2012b, Second flow channel; 2013, Liquid storage cavity; 2014, Channel; 210, First liquid storage component; 220, Second liquid storage component;

[0036] 300. Thermal conductive components. Detailed Implementation

[0037] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0038] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0039] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] like Figure 1 As shown, a battery cell assembly provided in one embodiment of the present invention includes a battery cell body 100 and a liquid storage device 200. The liquid storage device 200 is disposed on the battery cell body 100 and has a liquid storage space 201. The liquid storage space 201 is used to store electrolyte, and the electrolyte in the liquid storage space 201 is configured to flow into the interior of the battery cell body 100 to participate in the battery reaction.

[0041] The liquid storage component 200 can be made of a thermally conductive material and is attached to the battery cell body 100. The liquid storage component 200 can be made of metal or thermally conductive silicone. If the liquid storage component 200 is made of a conductive material, such as copper or aluminum, an insulating layer needs to be wrapped around its surface to prevent it from participating in the battery reaction inside the battery cell body 100. Optionally, the insulating layer can be polypropylene. The liquid storage component 200 can absorb heat from the battery cell body 100, thereby achieving the purpose of heat dissipation for the battery cell body 100.

[0042] Combination Figure 1 and Figure 2 It should be noted that the liquid storage device 200 is provided with a liquid storage space 201, which can be used to store electrolyte. The electrolyte can be injected into the liquid storage space 201 of the liquid storage device 200 in advance, or the electrolyte can be injected into the liquid storage space 201 of the liquid storage device 200 at the same time as the liquid filling inside the cell body 100.

[0043] It is understandable that during use, the battery cell body 100 will experience electrolyte loss. The electrolyte in the storage space 201 of the electrolyte storage device 200 can flow into the interior of the battery cell body 100 to participate in the battery reaction, thus replenishing the electrolyte. Here, the battery reaction refers to the chemical reaction that occurs inside the battery cell body 100 in order to achieve charging and discharging.

[0044] It should be noted that the battery cell assembly needs to be wrapped in an aluminum-plastic film. That is, during battery manufacturing, the battery cell assembly needs to be encapsulated using an aluminum-plastic film. After the battery cell assembly is encapsulated in the aluminum-plastic film, electrolyte needs to be injected into the interior of the aluminum-plastic film, allowing some electrolyte to enter the interior of the battery cell body 100 to participate in the reaction during subsequent charging and discharging. Another portion will enter the storage space 201 of the electrolyte storage device 200. Of course, some electrolyte will also accumulate around the battery cell assembly. When the interior of the aluminum-plastic film is subsequently evacuated, the excess electrolyte accumulated around the battery cell assembly will be squeezed out as the gas inside the aluminum-plastic film is extracted. This application uses the electrolyte storage device 200 to store the electrolyte. The electrolyte storage device 200 can act as a support or a container to prevent all the electrolyte except that inside the battery cell body 100 from being squeezed out by the aluminum-plastic film.

[0045] It should also be noted that after evacuating the aluminum-plastic film, a certain gap must be maintained between the aluminum-plastic film and the battery cell assembly to allow the electrolyte in the storage space 201 of the liquid storage device 200 to flow out and towards the interior of the battery cell body 100. In other words, even though the aluminum-plastic film will shrink due to the reduced internal air pressure after evacuation, by controlling the amount of evacuation, it is possible to prevent the aluminum-plastic film from tightly adhering to the surface of the battery cell assembly and forming a seal. This creates a gap between the aluminum-plastic film and the battery cell assembly, allowing the electrolyte in the storage space 201 of the liquid storage device 200 to flow out and towards the interior of the battery cell body 100.

[0046] It is understandable that after the battery is manufactured, only the electrolyte inside the cell body 100 will directly participate in the battery reaction, while the electrolyte storage space 201 stored in the electrolyte storage device 200 will not participate in the battery reaction. After the electrolyte is consumed due to the use of the cell body 100, the electrolyte in the electrolyte storage space 201 of the electrolyte storage device 200 will participate in the battery reaction after flowing into the cell body 100.

[0047] It is also understandable that before the electrolyte has soaked into the cell body 100, the electrolyte outside the cell body 100 can flow. During the use of the battery, the battery will inevitably move, and naturally, the electrolyte in the storage space 201 of the storage device 200 can flow out until it soaks into the cell body 100.

[0048] like Figure 1 As shown, the liquid storage device 200 is stacked on the battery cell body 100. It can be understood that the liquid storage device 200 is stacked on the battery cell body 100 and is in contact with the battery cell body 100. In this way, the contact area between the liquid storage device 200 and the battery cell body 100 is larger, which is beneficial for heat dissipation.

[0049] Furthermore, the liquid storage component 200 includes an adhesive wall that is attached to the battery cell body 100 and a non-adhesive wall that is not in contact with the battery cell body 100, and the liquid storage space 201 extends through at least the non-adhesive wall.

[0050] It is understandable that the wall surface where the liquid storage component 200 is in contact with the battery cell body 100 is defined as the in-contact wall, while the wall surface that is not in contact with the battery cell body 100 is defined as the non-in-contact wall. By allowing the liquid storage space 201 to pass through the non-in-contact wall, the liquid in the liquid storage space 201 can pass through the non-in-contact wall and flow out until it soaks into the interior of the battery cell body.

[0051] Furthermore, the stacking direction of the liquid storage component 200 and the battery cell body 100 is defined as a preset direction. The liquid storage component 200 has a first sidewall and a second sidewall 200a arranged along the preset direction, and an outer peripheral wall 200b connecting the edge of the first sidewall and the edge of the second sidewall 200a. The adhering wall includes the first sidewall, and the non-adhering wall includes the second sidewall 200a and the outer peripheral wall 200b. The liquid storage space 201 penetrates at least one of the second sidewall 200a and the outer peripheral wall 200b.

[0052] like Figure 1 As shown, the battery cell body 100 is a wound battery cell 110, and the liquid storage device 200 includes a first liquid storage device 210, which is stacked on the outer surface of the battery cell body 100. When the wound battery cell 110 is working, the surface of the wound battery cell 110 will generate a lot of heat, and the first liquid storage device 210 can absorb this heat, thereby achieving the purpose of heat dissipation for the battery cell body 100. Combined with... Figure 1 and Figure 3 The first sidewall of the first liquid storage component 210 is attached to the outer surface of the wound battery cell 110, while the second sidewall 200a and the outer peripheral wall 200b of the first liquid storage component 210 are not in contact with the wound battery cell 110. The liquid storage space 201 penetrates at least one of the second sidewall 200a and the outer peripheral wall 200b.

[0053] Specifically, the liquid storage space 201 may penetrate only the second sidewall 200a of the first liquid storage component 210, but not the first sidewall and the outer peripheral wall 200b of the first liquid storage component 210; or, the liquid storage space 201 may penetrate only the outer peripheral wall 200b of the first liquid storage component 210, but not the first sidewall and the second sidewall 200a of the first liquid storage component 210; or, the liquid storage space 201 may penetrate both the second sidewall 200a and the outer peripheral wall 200b of the first liquid storage component 210, but not the first liquid storage component 210. The first sidewall of 210; or, the liquid storage space 201 can penetrate both the first sidewall and the second sidewall 200a of the first liquid storage component 210, but not the outer peripheral wall 200b of the first liquid storage component 210; or, the liquid storage space 201 can penetrate both the first sidewall and the outer peripheral wall 200b of the first liquid storage component 210, but not the second sidewall 200a of the first liquid storage component 210; or, the liquid storage space 201 can penetrate the first liquid storage component 210, the second sidewall 200a, and the outer peripheral wall 200b.

[0054] It should be noted that after evacuating the aluminum-plastic film, a certain gap must be maintained between the aluminum-plastic film and the first liquid storage component 210 so that the electrolyte in the liquid storage space 201 of the first liquid storage component 210 can flow out. In other words, even if the aluminum-plastic film shrinks due to the decrease in internal air pressure after evacuation, by controlling the amount of evacuation, it is possible to prevent the aluminum-plastic film from tightly adhering to the surface of the first liquid storage component 210 and blocking the portion of the liquid storage space 201 that penetrates the surface of the first liquid storage component 210.

[0055] It should be further noted that in the embodiment where the liquid storage space 201 does not penetrate the first sidewall of the first liquid storage component 210, the contact area between the first liquid storage component 210 and the battery cell body 100 can be larger, resulting in better heat dissipation. In the embodiment where the liquid storage space 201 does not penetrate the second sidewall 200a and / or the outer peripheral wall 200b of the first liquid storage component 210, the liquid storage capacity of the first liquid storage component 210 is better. Specifically, since it is necessary to evacuate the interior of the aluminum-plastic film wrapped around the battery cell assembly, the aluminum-plastic film will shrink due to the decrease in internal air pressure. If the liquid storage space 201 penetrates the second sidewall 200a and / or the outer peripheral wall 200b of the first liquid storage component 210, some of the electrolyte in the liquid storage space 201 may be squeezed out, resulting in a decrease in the liquid storage capacity of the first liquid storage component 210.

[0056] like Figure 1 As shown, it can be understood that there can be two or more first liquid storage components 210, with two first liquid storage components 210 respectively disposed on opposite sides of the battery cell body 100 along a preset direction. This provides better heat dissipation.

[0057] like Figures 3 to 5 As shown, the liquid storage space 201 further includes a plurality of main liquid storage areas 2011 spaced apart, and an auxiliary liquid storage channel 2012 connecting the plurality of main liquid storage areas 2011; wherein, the main liquid storage area 2011 penetrates the second side wall 200a, the auxiliary liquid storage channel 2012 penetrates the second side wall 200a and / or the auxiliary liquid storage channel 2012 penetrates the outer peripheral wall 200b; wherein, the main liquid storage area 2011 may or may not penetrate the first side wall, and the auxiliary liquid storage channel 2012 may or may not penetrate the first side wall.

[0058] like Figure 3As shown, in some embodiments, the main liquid storage area 2011 simultaneously penetrates the first sidewall and the second sidewall 200a of the first liquid storage component 210; the auxiliary liquid storage channel 2012 simultaneously penetrates the second sidewall 200a and the outer peripheral wall 200b of the first liquid storage component 210, and the auxiliary liquid storage channel 2012 does not penetrate the first sidewall of the first liquid storage component 210. Specifically, the auxiliary liquid storage channel 2012 includes a first channel 2012a for connecting each two adjacent main liquid storage areas 2011, and a second channel 2012b for connecting at least one main liquid storage area 2011 and penetrating the outer peripheral wall 200b of the first liquid storage component 210. Furthermore, each second channel 2012b also penetrates the second sidewall 200a of the first liquid storage component 210.

[0059] like Figure 4 As shown, in some other embodiments, the main liquid storage area 2011 penetrates the second sidewall 200a of the first liquid storage component 210, and the main liquid storage area 2011 does not penetrate the first sidewall; the auxiliary liquid storage channel 2012 penetrates both the second sidewall 200a and the outer peripheral wall 200b of the first liquid storage component 210, and the auxiliary liquid storage channel 2012 does not penetrate the first sidewall of the first liquid storage component 210. Specifically, the auxiliary liquid storage channel 2012 includes a first channel 2012a for connecting each two adjacent main liquid storage areas 2011, and a second channel 2012b for communicating with at least one main liquid storage area 2011 and penetrating the outer peripheral wall 200b of the first liquid storage component 210. Furthermore, each second channel 2012b also penetrates the second sidewall 200a of the first liquid storage component 210.

[0060] like Figure 5 As shown, in some embodiments, there are two types of main liquid storage areas 2011 and two types of auxiliary liquid storage channels 2012; the first type of main liquid storage area 2011 penetrates the second sidewall 200a of the first liquid storage component 210, and the first type of auxiliary liquid storage channel 2012 connects multiple first type of main liquid storage areas 2011, and the first type of auxiliary liquid storage channel 2012 simultaneously penetrates the second sidewall 200a and the outer peripheral wall 200b of the first liquid storage component 210; the second type of main liquid storage area 2011 penetrates the first sidewall of the first liquid storage component 210, and the second type of auxiliary liquid storage channel 2012 connects multiple second type of main liquid storage areas 2011, and the second type of auxiliary liquid storage channel 2012 simultaneously penetrates the first sidewall and the outer peripheral wall 200b of the first liquid storage component 210.

[0061] like Figure 6As shown, in some embodiments, the liquid storage space 201 includes a liquid storage cavity 2013 formed inside the first liquid storage member 210, and a channel 2014 communicating with the liquid storage cavity 2013. The channel 2014 penetrates the non-adherent wall of the first liquid storage member 210 (the second side wall 200a or the outer peripheral wall 200b of the first liquid storage member 210). In other words, the first liquid storage member 210 has a hollow structure, the liquid storage cavity 2013 is formed inside the first liquid storage member 210, and the liquid storage cavity 2013 communicates with the outside of the first liquid storage member 210 through the channel 2014.

[0062] It should be noted that, Figures 3 to 6 Only a few different embodiments are provided. It is understood that all the various solutions described in "the main liquid storage area 2011 penetrates the second side wall 200a, the auxiliary liquid storage channel 2012 penetrates the second side wall 200a and / or the auxiliary liquid storage channel 2012 penetrates the outer peripheral wall 200b; the main liquid storage area 2011 penetrates or does not penetrate the first side wall, and the auxiliary liquid storage channel 2012 penetrates or does not penetrate the first side wall" are within the protection scope of this utility model.

[0063] like Figure 1 As shown, the main body of the battery cell 100 is a wound battery cell 110, and the wound battery cell 110 has a through channel.

[0064] It is understandable that the positive electrode, negative electrode, and separator are stacked together and then wound to form a wound cell 110. The through channel is formed by the positive electrode, negative electrode, and separator after they are wound together.

[0065] The liquid storage device 200 also includes a second liquid storage device 220, which is disposed in the through channel of the wound battery cell 110.

[0066] It is understandable that when the wound cell 110 is working, a lot of heat will be generated in the middle of the wound cell 110. The liquid storage device 200 can absorb this heat, thereby achieving the purpose of heat dissipation for the cell body 100.

[0067] Combination Figure 1 and Figure 3 The second liquid storage component 220 includes a first sidewall and a second sidewall 200a disposed opposite to each other, and an outer peripheral wall 200b connecting the edge of the first sidewall and the edge of the second sidewall 200a. The first sidewall and the second sidewall 200a of the second liquid storage component 220 are both in contact with the battery cell body 100, while at least a portion of the outer peripheral wall 200b is not in contact with the battery cell body 100, and the liquid storage space 201 of the second liquid storage component 220 at least extends through the portion of the outer peripheral wall 200b that is not in contact with the battery cell body 100.

[0068] It should be noted that the second liquid storage device 220 can be Figures 3 to 6The liquid storage device 200 shown is shown.

[0069] Combination Figure 1 and Figure 2 Furthermore, the battery cell assembly also includes a heat-conducting component 300, which is used to connect the first liquid storage component 210 and the second liquid storage component 220. The heat-conducting component 300 is made of a material with good thermal conductivity, such as metal (e.g., copper, iron, aluminum, etc.) or thermally conductive silicone.

[0070] Understandably, the heat-conducting component 300 can quickly transfer the heat absorbed by the second liquid storage component 220 to the first liquid storage component 210, so that the heat on the second liquid storage component 220 can be transferred to the outside of the wound battery cell 110 as soon as possible, thereby improving the heat dissipation effect.

[0071] like Figure 7 As shown, the main body of the battery cell 100 is a stacked battery cell 120, and the liquid storage device 200 is stacked on the surface of the stacked battery cell 120. When the stacked battery cell 120 is working, the surface of the stacked battery cell 120 will generate a lot of heat. The liquid storage device 200 can absorb this heat, thereby achieving the purpose of heat dissipation for the main body of the battery cell 100.

[0072] It should be noted that the structure of the liquid storage component 200 can be the same as that of the first liquid storage component 210 in the above embodiment. The liquid storage component 200 can simultaneously serve the functions of heat dissipation and liquid storage.

[0073] It should be noted that in some other embodiments, the liquid reservoir 200 may be made of other non-thermal conductive materials.

[0074] This utility model also provides a battery, including the cell assembly of the above embodiments.

[0075] The battery of this utility model has the cell assembly of the above embodiment. In the cell assembly, the cell body 100 will lose electrolyte during use. The electrolyte in the storage space 201 of the liquid storage device 200 can flow into the interior of the cell body 100 to participate in the battery reaction, thereby replenishing the electrolyte and improving the service life and performance of the cell assembly.

[0076] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0077] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery cell assembly, characterized in that, include: Battery cell body; A liquid storage device is disposed on the main body of the battery cell. The liquid storage device has a liquid storage space, wherein the liquid storage space is used to store electrolyte, and the electrolyte in the liquid storage space is configured to flow into the interior of the main body of the battery cell to participate in the battery reaction.

2. The battery cell assembly according to claim 1, characterized in that, The liquid storage component includes an adhesive wall that is attached to the main body of the battery cell and a non-adhesive wall that is not in contact with the main body of the battery cell, and the liquid storage space extends through at least the non-adhesive wall.

3. The cell assembly according to claim 2, characterized in that, The liquid storage device is stacked on the battery cell body. The stacking direction of the liquid storage device and the battery cell body is defined as a preset direction. The liquid storage device has a first sidewall and a second sidewall arranged along the preset direction, and an outer peripheral wall connecting the edge of the first sidewall and the edge of the second sidewall. The fitted wall includes the first sidewall, the non-fitted wall includes the second sidewall and the outer peripheral wall, and the liquid storage space penetrates at least one of the second sidewall and the outer peripheral wall.

4. The cell assembly according to claim 3, characterized in that, The liquid storage space includes multiple main liquid storage areas spaced apart, and auxiliary liquid storage channels connecting the multiple main liquid storage areas. The main liquid storage areas penetrate the second side wall, the auxiliary liquid storage channels penetrate the second side wall and / or the auxiliary liquid storage channels penetrate the outer peripheral wall. The main liquid storage area may or may not penetrate the first sidewall, and the auxiliary liquid storage channel may or may not penetrate the first sidewall.

5. The cell assembly according to claim 2, characterized in that, The liquid storage component has a first sidewall and a second sidewall disposed opposite to each other, and an outer peripheral wall connecting the edge of the first sidewall and the edge of the second sidewall. The bonding wall includes at least the first sidewall and the second sidewall, the non-bonding wall includes at least a portion of the outer peripheral wall, and the liquid storage space extends at least through the portion of the outer peripheral wall that is not bonded to the battery cell body.

6. The cell assembly according to claim 5, characterized in that, The liquid storage space includes multiple main liquid storage areas spaced apart, and an auxiliary liquid storage channel connecting the multiple main liquid storage areas. The auxiliary liquid storage channel passes through the outer peripheral wall at a position not in contact with the main body of the battery cell. The main liquid storage area may or may not penetrate the first sidewall, and the main liquid storage area may or may not penetrate the second sidewall; the auxiliary liquid storage channel may or may not penetrate the first sidewall, and the auxiliary liquid storage channel may or may not penetrate the second sidewall.

7. The cell assembly according to claim 2, characterized in that, The liquid storage space includes a liquid storage cavity formed inside the liquid storage component and a channel communicating with the liquid storage cavity, the channel penetrating the non-adherent wall.

8. The cell assembly according to claim 1, characterized in that, The main body of the battery cell is a laminated battery cell, and the liquid storage device is stacked with the laminated battery cell; or... The main body of the battery cell is a wound battery cell with a through channel. The liquid storage device includes a first liquid storage device and a second liquid storage device. The first liquid storage device is disposed on the outer surface of the wound battery cell, and the second liquid storage device passes through the through channel.

9. The cell assembly according to any one of claims 1 to 8, characterized in that, The liquid storage component is made of a thermally conductive material, and the liquid storage component is thermally connected to the main body of the battery cell.

10. A battery, characterized in that, Includes the battery cell assembly as described in any one of claims 1 to 9 above.

Images