Battery monomer

Abstract

The utility model discloses a battery monomer, which is used for solving the technical problem that electrolyte cannot be added into a battery after the performance of the battery is degraded due to the fact that a liquid injection hole of the existing battery is welded and sealed by a sealing element. The single battery comprises a shell, a battery cell and a first electrolyte, the shell is used for accommodating the battery cell and the first electrolyte, the shell comprises a first wall, a liquid supplementing structure is arranged on the first wall, and the liquid supplementing structure comprises a rotating part and a liquid supplementing bin filled with a second electrolyte; a mounting through hole is formed in the first wall, the rotating part is rotationally arranged in the mounting through hole, the liquid supplementing bin is fixed to the surface, facing the battery cell, of the first wall, a liquid outlet is formed in the liquid supplementing bin, the outer side wall of the rotating part comprises a side wall part and a through groove, the side wall part is in sealing fit with the liquid outlet, and the through groove extends to the bottom of the rotating part; and when the rotating piece rotates to a preset angle, the through groove is communicated with the liquid outlet, and the second electrolyte in the liquid supplementing bin flows to the through groove from the liquid outlet and flows into the shell along the through groove.

Description

Technical Field

[0001] The utility model relates to the technical field of battery design, in particular to a battery cell. Background Art

[0002] As the core of new energy vehicles, lithium-ion batteries have ushered in a rare market opportunity, but at the same time, they have also brought some hidden dangers. When these batteries can only be charged to 80% of their original capacitance, they are no longer suitable for continued use in new energy vehicles. How to respond to the after-market of new energy vehicles and reasonably recycle and utilize these batteries will become the development direction of enterprises.

[0003] Research has found that by replenishing the electrolyte of the attenuated battery, the capacity and cycle life of the battery can be improved. However, the current battery filling structure specifically uses a filling hole penetrating the battery top cover. The battery housing is filled through the filling hole by a filling machine. After filling, the filling hole is sealed by means of welding with steel balls or a sealing top. Such a design cannot add electrolyte to the battery after the battery performance decays, which is not conducive to the recycling, maintenance, and reuse of the still usable old batteries.

[0004] Therefore, finding a technical solution to solve the above technical problems has become an important research topic for those skilled in the art. Summary of the Utility Model

[0005] An embodiment of the utility model discloses a battery cell, which is used to solve the technical problem that the filling hole of the existing battery is sealed by welding a sealing member, resulting in the inability to add electrolyte to the battery after the battery performance decays.

[0006] A battery cell provided by the utility model includes a housing, an electric core, and a first electrolyte. The housing is used to accommodate the electric core and the first electrolyte. The housing includes a first wall, and a liquid replenishing structure is arranged on the first wall. The liquid replenishing structure includes a rotating member and a liquid replenishing chamber filled with a second electrolyte.

[0007] An installation through hole is formed in the first wall. The rotating member is rotatably arranged in the installation through hole. The liquid replenishing chamber is fixed on the surface of the first wall facing the electric core. The liquid replenishing chamber is provided with a liquid outlet. The outer side wall of the rotating member includes a side wall portion and a through groove. The side wall portion is in sealing cooperation with the liquid outlet. The through groove extends to the bottom of the rotating member.

[0008] When the rotating member rotates to a preset angle, the through groove is communicated with the liquid outlet, and the second electrolyte in the liquid replenishing chamber flows from the liquid outlet to the through groove and flows into the housing along the through groove.

[0009] Optionally, the number of the liquid replenishing chambers is multiple, and the multiple liquid replenishing chambers are arranged around the rotating member. The liquid outlet of each liquid replenishing chamber is in sealing cooperation with the side wall portion, and when the rotating member rotates to different preset angles, the liquid outlet of each liquid replenishing chamber is sequentially communicated with the through groove.

[0010] Optionally, the liquid outlet extends to the bottom of the liquid replenishing chamber, or the liquid outlet is arranged close to the bottom of the liquid replenishing chamber.

[0011] Optionally, a sealing member is further arranged on the rotating member, and the sealing member is located at one end of the rotating member away from the battery cell.

[0012] Optionally, the rotating member is of a hollow structure, a first engaging portion is arranged on the inner side wall of the rotating member, and a second engaging portion matched with the first engaging portion is arranged on the outer side wall of the sealing member;

[0013] When the sealing member is inserted into the rotating member, the first engaging portion and the second engaging portion are engaged with each other so that the sealing member seals the rotating member.

[0014] Optionally, the first engaging portion is a claw arranged on the inner side wall of the rotating member, and the second engaging portion is an annular clamping groove arranged on the outer side wall of the sealing member;

[0015] Or, the first engaging portion is an annular clamping groove arranged on the inner side wall of the rotating member, and the second engaging portion is a claw arranged on the outer side wall of the sealing member.

[0016] Optionally, the distance between one end of the rotating member away from the battery cell and the battery cell is greater than the distance between one end of the first wall away from the battery cell and the battery cell.

[0017] Optionally, a first indication mark is arranged on the sealing member, and the first indication mark corresponds to the position of the through groove and is used for indicating the position of the through groove;

[0018] And / or, a second indication mark is arranged on the surface of the first wall away from the battery cell, and the second indication mark corresponds to the position of the liquid outlet and is used for indicating the position of the liquid outlet.

[0019] Optionally, a sealing sleeve is arranged on the side wall portion, and the side wall portion is in sealing cooperation with the liquid outlet through the sealing sleeve.

[0020] Optionally, the liquid replenishing chamber and the first wall are of an integral structure.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] In this embodiment, when the battery cell needs to be replenished with electrolyte, the operator can rotate the rotating part to a preset angle to connect the through groove on the rotating part with the liquid outlet of the liquid replenishing chamber. The second electrolyte in the liquid replenishing chamber flows from the liquid outlet to the through groove and then flows into the housing along the through groove, thereby completing the liquid replenishing work for the battery cell. Through the above design, when the performance of the battery cell decays, the battery cell can be replenished with electrolyte, so as to achieve the effects of increasing the capacity of the battery cell and prolonging the battery cycle performance, improving the recycling value of the battery cell, and being more environmentally friendly. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0024] Figure 1 Structural schematic diagram of the surface of the first wall of a battery cell provided by an embodiment of the present invention on the side far from the battery core;

[0025] Figure 2 Structural schematic diagram of the surface of the first wall of a battery cell provided by an embodiment of the present invention on the side facing the battery core;

[0026] Figure 3 Exploded view of the structure of the liquid replenishing structure of a battery cell provided by an embodiment of the present invention;

[0027] Figure 4 Structural schematic diagram of the rotating part, sealing part and liquid replenishing chamber of a battery cell provided by an embodiment of the present invention;

[0028] Figure 5 Structural schematic diagram of the liquid replenishing chamber of a battery cell provided by an embodiment of the present invention;

[0029] Figure 6 Structural schematic diagram of the rotating part of a battery cell provided by an embodiment of the present invention;

[0030] Figure 7 Structural schematic diagram of the sealing part of a battery cell provided by an embodiment of the present invention;

[0031] Figure 8 Cross-sectional view of the liquid replenishing structure of a battery cell provided by an embodiment of the present invention;

[0032] Figure 9 Another cross-sectional structure diagram of the liquid replenishing structure of a battery cell provided by an embodiment of the present invention;

[0033] Illustration: First wall 1; Mounting through-hole 101; Seal 2; First indication mark 201; Second engaging portion 202; Rotating member 3; Through groove 301; First engaging portion 302; Side wall portion 303; Liquid supplement chamber 4; Liquid outlet 401. Detailed implementation manners

[0034] The utility model discloses a battery cell, which is used to solve the technical problem that the liquid injection hole of the existing battery is sealed by welding a seal, resulting in the inability to add electrolyte to the battery after the battery performance decays.

[0035] In order to enable those skilled in the art to better understand the solution of the utility model, the following further detailed description of the utility model will be given in conjunction with the accompanying drawings and specific implementation manners. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the utility model.

[0036] Please refer to Figures 1 to 9 , a battery cell provided by an embodiment of the utility model includes a housing, an electric core and a first electrolyte. The housing is used to accommodate the electric core and the first electrolyte. It is characterized in that the housing includes a first wall 1, and a liquid supplement structure is arranged on the first wall 1. The liquid supplement structure includes a rotating member 3 and a liquid supplement chamber 4 filled with a second electrolyte. Among them, the components of the first electrolyte and the second electrolyte are the same, and the two are essentially the same electrolyte to meet the need for supplementing the electrolyte;

[0037] The first wall 1 is provided with a mounting through-hole 101. The rotating member 3 is rotatably arranged in the mounting through-hole 101. The liquid supplement chamber 4 is fixed on the surface of the first wall 1 facing the electric core. The liquid supplement chamber 4 is provided with a liquid outlet 401. The outer side wall of the rotating member 3 includes a side wall portion 303 and a through groove 301. The side wall portion 303 is in sealing cooperation with the liquid outlet 401. The through groove 301 extends to the bottom of the rotating member 3. Here, the bottom specifically refers to the end of the rotating member 3 close to the electric core. The second electrolyte flows through the through groove 301 and the above-mentioned bottom and then flows to the electric core.

[0038] As Figure 8 shown, when the rotating member 3 rotates to a preset angle, the through groove 301 is communicated with the liquid outlet 401, and the second electrolyte in the liquid supplement chamber 4 flows from the liquid outlet 401 to the through groove 301 and flows into the housing along the through groove 301.

[0039] It should be noted that when the rotating member 3 is driven to rotate a preset angle around its own axis, the through groove 301 communicates with the liquid outlet 401. It can be simply understood that at this time, the through groove 301 and the liquid outlet 401 at least partially coincide in the height direction.

[0040] In this embodiment, when liquid feeding and discharging are not required, the side wall portion 303 and the liquid outlet 401 need to be hermetically fitted to prevent the leakage of the second electrolyte in the liquid feeding chamber 4.

[0041] When the battery cell needs to be replenished with electrolyte, the operator can rotate the rotating member 3 to a preset angle, so that the through groove 301 on the rotating member 3 communicates with the liquid outlet 401 of the liquid feeding chamber 4. The second electrolyte in the liquid feeding chamber 4 flows from the liquid outlet 401 to the through groove 301 and flows into the shell along the through groove 301, thereby completing the liquid feeding work of the battery cell. Through the above design, when the performance of the battery cell decays, the battery cell can be replenished with electrolyte, so as to achieve the effects of improving the capacity of the battery cell and extending the battery cycle performance, improving the recycling value of the battery cell, and being more environmentally friendly.

[0042] Furthermore, the shell in this embodiment specifically includes a shell body and a top cover plate arranged on the shell body. The first wall 1 in this embodiment can specifically be the above-mentioned top cover plate, and the liquid feeding structure is arranged on the top cover plate. In addition, the first wall 1 in this embodiment can also be the bottom wall of the shell body, the side plate of the shell body, etc. This embodiment does not limit this. Assuming that the first wall 1 is the side plate of the shell body, at this time, the second electrolyte cannot directly flow into the battery core under the action of gravity. The operator can rotate the battery cell so that the second electrolyte in the liquid feeding chamber 4 can flow into the battery core under the action of gravity.

[0043] Furthermore, please refer to Figure 2 , the number of the liquid feeding chambers 4 in this embodiment is multiple, and the multiple liquid feeding chambers 4 are arranged around the rotating member 3. The liquid outlet 401 of each liquid feeding chamber 4 is hermetically fitted with the side wall portion 303, and when the rotating member 3 rotates to different preset angles or the same preset angle, the liquid outlet 401 of each liquid feeding chamber 4 communicates with the through groove 301 one by one.

[0044] In the above design, it is preferably that when the rotating member 3 rotates to the same preset angle, the liquid outlet 401 of each liquid feeding chamber 4 communicates with the through groove 301 one by one. Through the above design, the operator can complete the liquid feeding operation more conveniently and simply.

[0045] Specifically, in this embodiment, the number of the liquid replenishing chambers 4 can be three, and the three liquid replenishing chambers 4 are evenly distributed on the edge of the mounting through hole 101. It can be simply understood that the included angle between two adjacent liquid replenishing chambers 4 among the three liquid replenishing chambers 4 is 120°. That is, after the rotating member 3 rotates 120°, the through groove 301 can be rotated from the liquid outlet 401 of the previous liquid replenishing chamber 4 to communicate with the liquid outlet 401 of another liquid replenishing chamber 4 adjacent to the previous liquid replenishing chamber 4.

[0046] In addition, when the number of the liquid replenishing chambers 4 is four, the included angle between two adjacent liquid replenishing chambers 4 among the four liquid replenishing chambers 4 is 90°, and so on.

[0047] Furthermore, as Figure 5 shown, in this embodiment, the liquid outlet 401 extends to the bottom of the liquid replenishing chamber 4, or the liquid outlet 401 is arranged close to the bottom of the liquid replenishing chamber 4. The above-mentioned bottom specifically refers to the end of the replenishing chamber close to the battery cell.

[0048] It should be noted that through the above design, it can be ensured that the second electrolyte in the liquid replenishing chamber 4 can flow out smoothly from the liquid replenishing chamber 4.

[0049] Furthermore, a sealing member 2 is also arranged on the rotating member 3 in this embodiment, and the sealing member 2 is located at one end of the rotating member 3 away from the battery cell.

[0050] Specifically, as Figure 6 and Figure 7 shown, the rotating member 3 is of a hollow structure in this embodiment. A first engaging portion 302 is arranged on the inner side wall of the rotating member 3, and a second engaging portion 202 that is matched with the first engaging portion 302 is arranged on the outer side wall of the sealing member 2;

[0051] When the sealing member 2 is inserted into the rotating member 3, the first engaging portion 302 and the second engaging portion 202 are engaged with each other so that the sealing member 2 seals the rotating member 3.

[0052] It should be noted that through the above design, using the sealing member 2 to seal on the rotating member 3 can prevent the hollow structure of the rotating member 3 from communicating with the outside air, thereby preventing the first electrolyte inside the battery single body from being affected by the moisture in the air.

[0053] In addition, before the sealing member 2 is hermetically connected to the rotating member 3, an operator can rotate the rotating member 3 to make the through groove 301 on the rotating member 3 communicate with the liquid outlet 401 of the liquid replenishing chamber 4, and then inject electrolyte into the liquid replenishing chamber 4 through an injection needle tube. After this process is completed, rotate the rotating member 3 to make the side wall portion 303 of the rotating member 3 be hermetically matched with the liquid outlet 401 of the liquid replenishing chamber 4, and finally fixedly connect the sealing member 2 to the rotating member 3.

[0054] Further, the first engaging portion 302 in this embodiment is a claw provided on the inner sidewall of the rotating member 3, and the second engaging portion 202 in this embodiment is an annular groove provided on the outer sidewall of the seal member 2;

[0055] Alternatively, the first engaging portion 302 in this embodiment is an annular groove provided on the inner sidewall of the rotating member 3, and the second engaging portion 202 in this embodiment is a claw provided on the outer sidewall of the seal member 2.

[0056] It should be noted that when the seal member 2 is inserted into the rotating member 3, the claw is engaged in the annular groove so that the seal member 2 is sealed on the rotating member 3, ensuring the connection stability between the seal member 2 and the rotating member 3 while achieving sealing.

[0057] In addition, the seal member 2 in this embodiment can also be connected to the rotating member 3 by other fixing methods. For example, the seal member 2 and the rotating member 3 can also be fixedly connected by an interference fit. This embodiment does not limit this.

[0058] Further, as Figure 1 shown, the distance between the end of the rotating member 3 away from the battery cell and the battery cell is greater than the distance between the end of the first wall 1 away from the battery cell and the battery cell.

[0059] It should be noted that through the above design, it is convenient for the operator to rotate the rotating member 3, thus facilitating the liquid filling operation.

[0060] Further, as Figure 4 shown, a first indication mark 201 is provided on the rotating member 3 in this embodiment. In addition, a first indication mark 201 can also be provided on the seal member 2. The first indication mark 201 corresponds to the position of the through groove 301 and is used to indicate the position of the through groove 301;

[0061] And / or, a second indication mark is provided on the surface of the first wall 1 away from the battery cell. The second indication mark corresponds to the position of the liquid outlet 401 and is used to indicate the position of the liquid outlet 401.

[0062] It should be noted that through the above design, the first indication mark 201 is used to indicate the position of the through groove 301, thus facilitating the operator to rotate the rotating member 3, so that during the liquid filling process, the through groove 301 on the rotating member 3 can correspond to the liquid outlet 401 of the liquid filling chamber 4, and then the second electrolyte flows into the housing.

[0063] Similarly, the second indicating mark is used to indicate the position of the liquid outlet 401 of each liquid replenishing chamber 4, so as to facilitate the operator to rotate the rotating member 3, so that during the liquid replenishing process, the through groove 301 on the rotating member 3 can correspond to the liquid outlet 401 of the liquid replenishing chamber 4, and further enable the second electrolyte to flow into the housing.

[0064] In addition, the first indicating mark 201 and the second indicating mark in this embodiment can be designs such as notches, and this embodiment does not limit the comparison.

[0065] Further, a sealing sleeve is provided on the side wall portion 303 in this embodiment, and the side wall portion 303 is in sealing cooperation with the liquid outlet 401 through the sealing sleeve.

[0066] It should be noted that through the above design, it can be ensured that when the rotating member 3 is not driven to rotate, the sealing sleeve on the rotating member 3 can seal the liquid outlet 401 of the liquid replenishing chamber 4 to prevent the electrolyte from flowing out of the liquid outlet 401.

[0067] Further, as Figure 2 shown, the liquid replenishing chamber 4 in this embodiment is an integral structure with the first wall 1.

[0068] It should be noted that through the above design, the structural integrity of the entire housing can be strengthened, the installation steps can be saved, and the production efficiency of the battery cell can be improved.

[0069] Further, as Figure 9 shown, a groove is provided on the first wall 1 near the liquid replenishing chamber 4 in this embodiment, and the second electrolyte accommodation space in the liquid replenishing chamber 4 is arranged in cooperation with the groove. Through the above design, on the one hand, the liquid replenishing chamber 4 can accommodate more second electrolyte; on the other hand, the internal space of the battery cell can be saved, and the energy density of the battery cell can be improved.

[0070] The above has introduced in detail a battery cell provided by the present invention. For those of ordinary skill in the art, according to the idea of the embodiments of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A battery cell, comprising a housing, an electrode core, and a first electrolyte. The housing is used to accommodate the electrode core and the first electrolyte, and is characterized in that, The housing includes a first wall (1), and a liquid replenishing structure is provided on the first wall (1). The liquid replenishing structure includes a rotating member (3) and a liquid replenishing chamber (4) filled with a second electrolyte solution; The first wall (1) is provided with an installation through hole (101). The rotating member (3) is rotatably arranged in the installation through hole (101). The liquid replenishing chamber (4) is fixed on the surface of the first wall (1) facing the battery cell. The liquid replenishing chamber (4) is provided with a liquid outlet (401). The outer side wall of the rotating member (3) includes a side wall portion (303) and a through groove (301). The side wall portion (303) is in sealing cooperation with the liquid outlet (401), and the through groove (301) extends to the bottom of the rotating member (3); When the rotating member (3) rotates to a preset angle, the through groove (301) communicates with the liquid outlet (401). The second electrolyte solution in the liquid replenishing chamber (4) flows from the liquid outlet (401) to the through groove (301) and flows into the housing along the through groove (301).

2. The battery cell according to claim 1, wherein, The number of the liquid replenishing chambers (4) is multiple. The multiple liquid replenishing chambers (4) are arranged around the rotating member (3). The liquid outlet (401) of each liquid replenishing chamber (4) is in sealing cooperation with the side wall portion (303). When the rotating member (3) rotates to different preset angles, the liquid outlet (401) of each liquid replenishing chamber (4) communicates with the through groove (301) one by one.

3. The battery cell according to claim 1, wherein The liquid outlet (401) extends to the bottom of the liquid replenishing chamber (4), or the liquid outlet (401) is arranged close to the bottom of the liquid replenishing chamber (4).

4. The battery cell according to claim 1, characterized in that, A sealing member (2) is further provided on the rotating member (3). The sealing member (2) is located at one end of the rotating member (3) away from the battery cell.

5. The battery cell according to claim 4, wherein The rotating member (3) is of a hollow structure. A first engaging portion (302) is provided on the inner side wall of the rotating member (3). A second engaging portion (202) that is used in cooperation with the first engaging portion (302) is provided on the outer side wall of the sealing member (2); When the sealing member (2) is inserted into the rotating member (3), the first engaging portion (302) and the second engaging portion (202) engage with each other so that the sealing member (2) seals the rotating member (3).

6. The battery cell according to claim 5, characterized in that, The first engaging portion (302) is a claw provided on the inner side wall of the rotating member (3), and the second engaging portion (202) is an annular clamping groove provided on the outer side wall of the sealing member (2); Or, the first engaging portion (302) is an annular clamping groove provided on the inner side wall of the rotating member (3), and the second engaging portion (202) is a claw provided on the outer side wall of the sealing member (2).

7. The battery cell according to claim 1, characterized in that, The distance between one end of the rotating member (3) away from the battery cell and the battery cell is greater than the distance between one end of the first wall (1) away from the battery cell and the battery cell.

8. The battery cell according to claim 4, wherein, A first indicating mark (201) is provided on the sealing member (2). The first indicating mark (201) corresponds to the position of the through groove (301) and is used to indicate the position of the through groove (301); And / or, a second indication mark is provided on the surface of the first wall (1) away from the battery cell, and the second indication mark corresponds to the position of the liquid outlet (401) and is used to indicate the position of the liquid outlet (401).

9. The battery cell according to claim 1, characterized in that A sealing sleeve is provided on the side wall portion (303), and the side wall portion (303) is sealingly fitted with the liquid outlet (401) through the sealing sleeve.

10. The battery cell according to claim 1, wherein, The liquid replenishing chamber (4) and the first wall (1) are of an integral structure.

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