CN220652063U - Battery capable of preventing liquid injection from deforming - Google Patents

Abstract

The utility model relates to a battery capable of preventing injection deformation. Relates to the technical field of new energy batteries. The application specifically comprises a shell with a cavity therein, a positive pole column arranged in the cavity, and a negative pole column arranged in the cavity, wherein the positive pole column is in flexible connection with the negative pole column; in the process of negative pressure air suction of the cavity, the positive pole and the negative pole are mutually abutted to support the two opposite side walls of the cavity; in the process of filling the cavity, the positive pole and the negative pole extend outwards to tighten the two opposite side walls of the cavity. In the utility model, in the negative pressure vacuumizing stage, the positive pole column and the negative pole column support two opposite side walls of the cavity in the cavity to prevent the shell from being further sunken; in the electrolyte injection stage, the positive pole post and the negative pole post tighten the two opposite side walls of the cavity in the cavity to inhibit the shell from further expanding outwards, so that in the electrolyte injection process of the battery, the shell of the battery is prevented from generating larger deformation, and the appearance and the service performance of the battery are ensured.

Description

Battery capable of preventing liquid injection from deforming

Technical Field

The utility model relates to the technical field of new energy batteries, in particular to a battery capable of preventing liquid injection from deforming.

Background

In the production process of the battery, electrolyte needs to be injected into the shell of the battery through the electrolyte injection hole. At present, the battery is usually injected by adopting a mechanical injection method, the inside of a shell of the battery is firstly vacuumized through negative pressure, then electrolyte is injected into the inside of the shell through an injection hole, and the two processes can easily lead to the deformation of the shell of the battery. The conventional battery shell is made of aluminum materials, has certain elastic deformation capacity, and can recover the original shape when small deformation occurs, but cannot automatically recover the original shape when large deformation occurs, so that the appearance of the battery is influenced, and the use of the battery is also influenced.

Chinese patent CN218602714U, publication No. 2023-03-10 discloses a liquid injection hole sealing assembly and a battery, wherein the liquid injection hole sealing assembly comprises a fixing plate, a sealing member and a sealing plate, the liquid injection hole is formed in the fixing plate, the sealing member seals the liquid injection hole, a step groove is concavely formed in a side surface of the fixing plate, which is far away from the inside of the battery, the step groove comprises a first groove and a second groove, the liquid injection hole penetrates through the bottom of the second groove, the sealing plate is inserted into the second groove, the peripheral side wall of the sealing plate is welded and sealed with the groove wall of the second groove, and a side surface of the sealing plate, which is far away from the sealing member, is lower than the notch of the first groove. When the battery is subjected to a vacuumizing stage and a liquid injection stage in the liquid injection process through the liquid injection hole, the battery shell can be greatly deformed, so that the appearance of the battery is influenced, and the use of the battery is also influenced.

Disclosure of Invention

The present utility model has been made in view of the above-described drawbacks of the prior art, and an object of the present utility model is to provide a battery capable of preventing a case of the battery from being greatly deformed during a liquid injection process of the battery, and ensuring the appearance and the usability of the battery.

The utility model provides a battery capable of preventing injection deformation, which comprises a shell, a positive pole column and a negative pole column, wherein a cavity is formed in the shell; in the process of carrying out negative pressure air suction on the cavity, the positive pole post and the negative pole post are mutually abutted to support two opposite side walls of the cavity; in the process of injecting the liquid into the cavity, the positive pole column and the negative pole column extend outwards to tighten the two opposite side walls of the cavity.

Further, a first pole plate for mounting the positive pole and a second pole plate for mounting the negative pole are also arranged in the shell.

Further, a first sealing ring is arranged between the first pole plate and the positive pole, and a second sealing ring is arranged between the second pole plate and the negative pole.

Further, the positive electrode post comprises a first outer connecting portion mounted on the first electrode post plate and a first inner connecting portion connected with the negative electrode post, and the first outer connecting portion and the first inner connecting portion are of an integrated structure.

Further, the negative electrode post comprises a second outer connecting portion arranged on the second electrode post plate and a second inner connecting portion connected with the first inner connecting portion, and the second outer connecting portion and the second inner connecting portion are of an integrated structure.

Further, a first soft connection is arranged at one end, far away from the first outer connection part, of the first inner connection part, a second soft connection is arranged at one end, far away from the second outer connection part, of the second inner connection part, and the first soft connection is connected with the second soft connection.

Further, the first flexible connection includes a first fixing portion and a first hooking portion, the first fixing portion is connected with the first external connection portion and the first hooking portion, the second flexible connection includes a second fixing portion and a second hooking portion, the second fixing portion is connected with the second external connection portion and the second hooking portion, when the positive pole and the negative pole are mutually abutted, the first hooking portion is abutted with the second fixing portion, the second hooking portion is abutted with the first fixing portion, and when the positive pole and the negative pole are outwards extended, the first hooking portion is hooked with the second hooking portion.

Further, the first fixing portion is provided with a first cambered surface matched with the outer side face of the second hooking portion, and the second fixing portion is provided with a second cambered surface matched with the outer side face of the first hooking portion.

Further, a positive hole for one end of the positive pole to extend out of the cavity is formed in one side face of the shell, and a negative hole for one end of the negative pole to extend out of the cavity is formed in the other opposite side face of the shell.

Further, the top opening of the shell, the battery box further comprises a cover plate for closing or opening the top opening of the shell, and a liquid injection hole for injecting liquid into the cavity is formed in the cover plate.

The battery for preventing the liquid injection deformation has the following gain effects:

(1) In the negative pressure vacuumizing stage, the positive pole column and the negative pole column support two opposite side walls of the cavity in the cavity to prevent the shell from being further sunken; in the electrolyte injection stage, the positive pole column and the negative pole column tighten the two opposite side walls of the cavity in the cavity to inhibit the shell from expanding outwards further, so that the shell of the battery is prevented from deforming greatly in the electrolyte injection process of the battery, and the appearance and the service performance of the battery are ensured;

(2) The battery is characterized in that a first pole plate and a second pole plate are further arranged in a shell cavity of the battery, a positive pole is fixedly arranged on the first pole plate, the second pole plate is fixedly arranged on the second pole plate, the positive pole is fixedly connected with one side wall of the shell cavity through welding the first pole plate with the side wall of the shell cavity, and a negative pole is fixedly connected with the side wall of the shell cavity through welding the second pole plate with the other side wall of the shell cavity, so that the positive pole and the negative pole are fixed on the shell more firmly;

(3) The first sealing ring is arranged between the positive pole and the first pole plate, and the second sealing ring is arranged between the negative pole and the second pole plate, so that electrolyte injected into the cavity is prevented from flowing out through a gap between the positive pole and the positive pole hole and a gap between the negative pole and the negative pole hole, and leakage of the electrolyte is caused, and the use of the battery is influenced;

(4) The first outer connecting part and the first inner connecting part of the battery are of an integrated structure, so that the structural strength of the positive pole column is enhanced, the positive pole column is prevented from being broken, the positive pole column and the negative pole column are further abutted against each other, and better supporting force or tensioning force can be generated on the shell when the positive pole column and the negative pole column are mutually tensioned, and the shell is further prevented from being greatly deformed in the liquid injection process, so that the appearance and the use of the battery are influenced;

(5) The second outer connecting part and the second inner connecting part of the battery are of an integrated structure, so that the structural strength of the negative electrode column is enhanced, the negative electrode column is prevented from being broken, the positive electrode column and the negative electrode column are further abutted against each other, and better supporting force or tensioning force can be generated on the shell when the positive electrode column and the negative electrode column are mutually tensioned, and the shell is further prevented from being greatly deformed in the liquid injection process, so that the appearance and the use of the battery are influenced;

(6) The first hook joint portion and the second fixed part butt of this battery, when second hook joint portion and first fixed part butt, first cambered surface cooperates with the lateral surface of second hook joint portion, carries out spacingly to second hook joint portion, and the second cambered surface cooperates with the lateral surface of first hook joint portion, carries out spacingly to first hook joint portion to prevent that first hook joint portion and second hook joint portion from producing to break away from, guarantee the positive pole post and negative pole post to the supporting effect of casing both sides opposite side.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description, serve to explain the principles of the utility model. In the drawings, like reference numerals are used to identify like elements.

Fig. 1 is a schematic cross-sectional view of a battery for preventing deformation of a liquid injection according to an embodiment of the present utility model;

fig. 2 is a schematic structural view showing a transparent state of a case of a battery for preventing deformation of a filling liquid according to an embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a connection between a first flexible connection and a second flexible connection of a battery for preventing deformation of a filling in accordance with an embodiment of the present utility model.

In the figure: 1. a housing; 11. a positive electrode hole; 12. a negative electrode hole; 2. a cover plate; 21. a liquid injection hole; 22. an explosion-proof valve; 3. a positive electrode post; 31. a first external connection portion; 32. a first inner connection; 33. a first flexible connection; 331. a first fixing portion; 3311. a first cambered surface; 332. a first hooking portion; 4. a first pole plate; 5. a first seal ring; 6. a negative electrode column; 61. a second external connection portion; 62. a second inner connection; 63. a second flexible connection; 631. a second fixing portion; 6311. a second cambered surface; 632. a second hooking portion; 7. a second pole plate; 8. and a second sealing ring.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model, and all other embodiments obtained by those skilled in the art without making any creative effort based on the embodiments of the present utility model are included in the protection scope of the present utility model.

Referring to fig. 1 to 3, a battery for preventing liquid injection deformation according to an embodiment of the present utility model includes a housing 1 having a cavity therein, a positive electrode column 3 disposed in the cavity, and a negative electrode column 6 disposed in the cavity, wherein the positive electrode column 3 is flexibly connected with the negative electrode column 6; in the process of negative pressure air suction of the cavity, the positive pole 3 and the negative pole 6 are mutually abutted to support the opposite side walls of the cavity; during the filling of the cavity, the positive electrode column 3 and the negative electrode column 6 extend outwards, and the two opposite side walls of the cavity are tensioned.

In this application, the battery includes casing 1, positive electrode post 3 and negative electrode post 6, is equipped with the cavity in the casing 1, and positive electrode post 3 and negative electrode post 6 set up in the cavity. The top of the shell 1 is provided with an opening which communicates the cavity with the outside, the battery also comprises a cover plate 2, and the cover plate 2 seals the opening, so that the shell 1 of the battery is in a closed structure. The cover plate 2 is provided with a liquid injection hole 21, and electrolyte can be injected into the cavity through the liquid injection hole 21. It is envisioned that: the cover plate 2 is also provided with an explosion-proof valve 22 for releasing pressure and explosion-proof to the battery when the battery is out of control, so as to prevent safety accidents in the use process of the battery and ensure personal safety.

In the conventional battery injection, mechanical injection is generally adopted, the interior of the battery casing 1 is firstly vacuumized by negative pressure, and then electrolyte is injected into the interior of the battery casing 1 through the injection hole 21, and the two processes easily cause the battery casing 1 to deform. The conventional battery case 1 is made of an aluminum material, has a certain elastic deformation capability, and can recover an original shape when small deformation occurs, but cannot automatically recover the original shape when large deformation occurs, so that the appearance of the battery is affected, and the use of the battery is also affected.

In the negative pressure vacuumizing stage, the air pressure in the shell 1 is smaller than the external air pressure, the shell 1 can be inwards recessed under the action of the pressure difference, and the pressure difference gradually increases along with the continuation of vacuumizing, so that the inwards recess of the shell 1 gradually increases, and the shell 1 of the battery cannot automatically recover to the original shape; at the stage of electrolyte injection, electrolyte is injected into the cavity of the shell 1, so that the shell 1 can expand outwards, and the degree of the outward expansion of the shell 1 is gradually increased along with the gradual increase of the injected electrolyte, so that the shell 1 of the battery cannot automatically recover to the original shape, and the appearance of the battery is influenced, and the use of the battery is also influenced.

Therefore in this application, positive pole 3 and negative pole post 6 soft connection in setting up in casing 1, when carrying out negative pressure to the cavity and exhausting, the atmospheric pressure of cavity is less than external atmospheric pressure, under the effect of pressure differential, casing 1 can inwards be sunken, drive positive pole 3 and negative pole post 6 and be close to each other, until positive pole 3 and negative pole post 6 butt each other, make positive pole 3 and negative pole post 6 support the opposite side wall of cavity inside, and leave the clearance that is used for the evacuation between positive pole 3 and the negative pole post 6, thereby prevent to continue the in-process of evacuation, casing 1 further sunken, and then prevent that casing 1 from appearing great deformation, make casing 1 can automatic recovery original shape after the evacuation is accomplished, can not influence the outward appearance and the use of battery.

When electrolyte is injected into the cavity of the shell 1, the electrolyte enters the cavity, so that the shell 1 expands outwards, the positive pole 3 and the negative pole 6 are driven to extend outwards until the positive pole 3 and the negative pole 6 are tensioned, and the positive pole 3 and the negative pole 6 are tensioned on two opposite side walls of the cavity in the cavity, so that the shell 1 is restrained from expanding outwards further in the process of continuously injecting the electrolyte, and the shell 1 is prevented from deforming greatly, so that the shell 1 can automatically recover the original shape after the electrolyte injection is completed, and the appearance and the use of the battery are not affected.

It is envisioned that: in the process of charging and discharging the battery, when the battery is out of control, the shell 1 of the battery can expand outwards, so that the two opposite side walls of the cavity are tensioned through the positive pole post 3 and the negative pole post 6, and the expansion of the shell 1 caused by the out of control can be restrained, so that the battery is prevented from swelling when in use, and the use of the battery is influenced.

In this embodiment, a side surface of the case 1 is provided with a positive electrode hole 11 through which one end of the positive electrode 3 extends out of the cavity, and the opposite side surface of the case 1 is provided with a negative electrode hole 12 through which one end of the negative electrode 6 extends out of the cavity. A positive electrode hole 11 is arranged on one side surface of the shell 1, and one end of the positive electrode column 3 positioned in the cavity of the shell 1 penetrates through the positive electrode hole 11 and then extends out of the shell 1. The other opposite side of the shell 1 is provided with a negative electrode hole 12, and one end of a negative electrode column 6 positioned in the cavity of the shell 1 penetrates through the negative electrode hole 12 and then extends out of the shell 1, so that the positive electrode column 3 and the negative electrode column 6 of the battery can be electrically connected with equipment needing power supply from the outside, and the power supply function of the battery is realized.

When one end of the positive pole 3 penetrates through the positive pole hole 11 on one side surface of the shell 1, the outer wall of the positive pole 3 is fixedly connected with the inner wall of the positive pole hole 11, and when one end of the negative pole 6 penetrates through the negative pole hole 12 on the other opposite side surface of the shell 1, the outer wall of the negative pole 6 is fixedly connected with the inner wall of the negative pole hole 12, so that when the two opposite side surfaces of the shell 1 are inwards sunken, the positive pole 3 and the negative pole 6 can be driven to approach each other; when the two opposite sides of the shell 1 expand outwards, the positive pole 3 and the negative pole 6 can be driven to extend outwards.

In the present embodiment, the housing 1 is further provided therein with a first post plate 4 for mounting the positive post 3 and a second post plate 7 for mounting the negative post 6. A first pole plate 4 and a second pole plate 7 are also arranged in the cavity of the shell 1, the positive pole 3 is fixedly arranged on the first pole plate 4, and the second pole plate 7 is fixedly arranged on the second pole plate 7. When the positive pole 3 penetrates through the positive hole 11 at one end inside the cavity of the shell 1, the first pole plate 4 is abutted against one side wall of the cavity of the shell 1, and the positive pole 3 is fixedly connected with the side wall of the cavity by welding the first pole plate 4 with the side wall of the cavity of the shell 1, so that the positive pole 3 is fixed on the shell 1 more firmly.

When one end of the negative pole column 6 in the cavity of the shell 1 penetrates through the negative pole hole 12, the second pole column plate 7 is abutted against the other side wall opposite to the cavity of the shell 1, and the negative pole column 6 is fixedly connected with the side wall of the cavity by welding the second pole column plate 7 with the side wall of the cavity of the shell 1, so that the fixing of the negative pole column 6 on the shell 1 is more stable, and when the two opposite sides of the shell 1 are inwards recessed, the positive pole column 3 and the negative pole column 6 can be driven to be close to each other; when the two opposite sides of the shell 1 expand outwards, the positive pole 3 and the negative pole 6 can be driven to extend outwards.

In this embodiment, a first sealing ring 5 is disposed between the first pole plate 4 and the positive pole 3, and a second sealing ring 8 is disposed between the second pole plate 7 and the negative pole 6. Because positive pole 3 one end runs through positive hole 11, the other end and negative pole post 6 flexonics, first utmost point post board 4 runs through positive pole post 3 the one end inboard of positive hole 11 and the lateral wall welding of casing 1 cavity, negative pole post 6 one end runs through negative pole hole 12, the other end is connected with positive pole post 3 flexonics, second utmost point post board 7 runs through negative pole post 6 the one end inboard of negative pole hole 12 and the lateral wall welding of casing 1 cavity, consequently positive pole post 3 needs to run through first utmost point post board 4, negative pole post 6 needs to run through second utmost point post board 7.

In this application, therefore, a first seal ring 5 is disposed between the positive electrode 3 and the first electrode plate 4, and when the positive electrode 3 penetrates the first electrode plate 4, the first seal ring 5 seals the gap between the positive electrode 3 and the first electrode plate 4; be provided with second sealing washer 8 between negative pole post 6 and the second post board 7, when negative pole post 6 runs through the second post board 7, the clearance between negative pole post 6 and the second post board 7 is sealed to the second sealing washer 8 to prevent to pour into the electrolyte in the cavity into, through the clearance between positive pole post 3 and the first post board 4, and the clearance between negative pole post 6 and the second post board 7, and then through the clearance between positive pole post 3 and positive hole 11, and the clearance between negative pole post 6 and negative hole 12 flows, leads to the electrolyte to reveal, influences the use of battery.

In the present embodiment, the positive electrode tab 3 includes a first outer connection portion 31 mounted on the first electrode tab plate 4, and a first inner connection portion 32 for connection with the negative electrode tab 6, the first outer connection portion 31 and the first inner connection portion 32 being of a unitary structure. The positive pole 3 includes a first outer connecting portion 31 and a first inner connecting portion 32, and after the first outer connecting portion 31 penetrates through the first pole plate 4, one end of the first outer connecting portion extends out of the housing 1 from the positive hole 11, and the first sealing ring 5 is disposed between the first outer connecting portion 31 and the first pole plate 4.

The first inner connection portion 32 is soft-connected to the negative electrode column 6 inside the first outer connection portion 31. The first outer connecting portion 31 and the first inner connecting portion 32 are integrally formed, so that the structural strength of the positive pole 3 is enhanced, the positive pole 3 and the negative pole 6 are prevented from being mutually abutted, and when the positive pole 3 and the negative pole 6 are mutually tensioned, the positive pole 3 is broken, and further the positive pole 3 and the negative pole 6 can generate better supporting force or tensioning force on the shell 1, and further the shell 1 is prevented from being greatly deformed in the liquid injection process, so that the appearance and the use of the battery are affected.

In the present embodiment, the anode stem 6 includes a second outer connection portion 61 mounted on the second stem plate 7, and a second inner connection portion 62 connected to the first inner connection portion 32, the second outer connection portion 61 and the second inner connection portion 62 being of a unitary structure. The cathode post 6 includes a second outer connecting portion 61 and a second inner connecting portion 62, wherein one end of the second outer connecting portion 61 extends out of the housing 1 from the cathode hole 12 after penetrating through the second post plate 7, and the second seal ring 8 is disposed between the second outer connecting portion 61 and the second post plate 7.

The second inner connection portion 62 is in soft connection with the first inner connection portion 32 of the positive electrode tab 3 on the inner side of the second outer connection portion 61. The second outer connecting portion 61 and the second inner connecting portion 62 are integrally formed, so that the structural strength of the negative electrode column 3 is enhanced, the positive electrode column 3 and the negative electrode column 6 are prevented from being mutually abutted, and when the positive electrode column 3 and the negative electrode column 6 are mutually tensioned, the negative electrode column 6 is broken, and further the positive electrode column 3 and the negative electrode column 6 can generate better supporting force or tensioning force on the shell 1, and further the shell 1 is prevented from being greatly deformed in the liquid injection process, so that the appearance and the use of the battery are affected.

In this embodiment, a first flexible connection 33 is disposed at an end of the first inner connection portion 32 away from the first outer connection portion 31, a second flexible connection 63 is disposed at an end of the second inner connection portion 62 away from the second outer connection portion 61, and the first flexible connection 33 is connected with the second flexible connection 63. One end of the first inner connecting part 32 is connected with the first outer connecting part 31, the other end is provided with a first flexible connection 33, one end of the second inner connecting part 62 is connected with the second outer connecting part 61, and the other end is provided with a second flexible connection 63.

The first flexible connection 33 and the second flexible connection 63 are in flexible connection, when the shell 1 is recessed inwards, the first flexible connection 33 and the second flexible connection 63 are driven to approach each other until the first flexible connection 33 and the second flexible connection 63 are in mutual abutting connection, so that the first outer connection portion 31 and the second outer connection portion 61 can support two opposite sides of the shell 1 respectively in a cavity of the shell 1, the shell 1 is prevented from being recessed further in the process of continuously vacuumizing, and further the shell 1 is prevented from being deformed greatly.

When the casing 1 expands outwards, the first flexible connection 33 and the second flexible connection 63 are driven to be far away from each other until the first flexible connection 33 and the second flexible connection 63 are tensioned, so that the first external connection part 31 and the second external connection are arranged inside the cavity of the casing 1, the two opposite side walls of the cavity are tensioned, and further expansion of the casing 1 is restrained in the process of continuously injecting electrolyte, and further large deformation of the casing 1 is prevented.

In the present embodiment, the first flexible connection 33 includes a first fixing portion 331 and a first hooking portion 332, the first fixing portion 331 connects the first outer connecting portion 31 and the first hooking portion 332, the second flexible connection 63 includes a second fixing portion 631 and a second hooking portion 632, the second fixing portion 631 connects the second outer connecting portion 61 and the second hooking portion 632, when the positive electrode post 3 and the negative electrode post 6 abut against each other, the first hooking portion 332 abuts against the second fixing portion 631, the second hooking portion 632 abuts against the first fixing portion 331, and when the positive electrode post 3 and the negative electrode post 6 extend outward, the first hooking portion 332 and the second hooking portion 632 are hooked.

When the housing 1 is recessed inwards, the first hooking portion 332 and the second hooking portion 632 are driven to approach each other until the first hooking portion 332 abuts against the second fixing portion 631, and the second hooking portion 632 abuts against the first fixing portion 331, so that the first outer connecting portion 31 and the second outer connecting portion 61 can support two opposite sides of the housing 1 respectively inside the cavity of the housing 1, further recessing of the housing 1 in the process of continuing vacuumizing is prevented, and further large deformation of the housing 1 is prevented.

When the casing 1 expands outwards, the first hooking portion 332 and the second hooking portion 632 are driven to separate from each other until the first hooking portion 332 and the second hooking portion 632 are hooked, so that the first external connection portion 31 and the second external connection portion are connected inside the cavity of the casing 1, and the two opposite side walls of the cavity are tensioned, so that in the process of continuously injecting electrolyte, the casing 1 is restrained from expanding outwards further, and the casing 1 is prevented from deforming greatly.

In the present embodiment, the first fixing portion 331 is provided with a first arc surface 3311 engaged with the outer side surface of the second hooking portion 632, and the second fixing portion 631 is provided with a second arc surface 6311 engaged with the outer side surface of the first hooking portion 332. One end of the first fixing portion 331 is connected to the first outer connecting portion 31, the other end is connected to the first hooking portion 332, and a side surface of one end of the first fixing portion 331 connected to the first hooking portion 332 is a first arc surface 3311. One end of the second fixing portion 631 is connected to the second external connection portion 61, the other end is connected to the second hooking portion 632, and a side surface of one end of the second fixing portion 631 connected to the second hooking portion 632 is a second cambered surface 6311.

When the positive electrode post 3 and the negative electrode post 6 are abutted against each other, the outer side surface of the first hooking portion 332 is abutted against the inner side surface of the second fixing portion 631, and the outer side surface of the second hooking portion 632 is abutted against the inner side surface of the first fixing portion 331, at this time, the first hooking portion 332 and the second hooking portion 632 are not hooked, and under the inward concave force of the casing 1, the first hooking portion 332 and the second hooking portion 632 may be bent upward or downward, so that the first hooking portion 332 and the second hooking portion 632 are separated from each other, and the supporting effect of the positive electrode post 3 and the negative electrode post 6 on the two opposite sides of the casing 1 is affected.

Therefore, in this application, when the housing 1 is recessed inwards, the first hooking portion 332 and the second hooking portion 632 are driven to approach each other, so that the first hooking portion 332 abuts against the second fixing portion 631, when the second hooking portion 632 abuts against the first fixing portion 331, the first arc surface 3311 cooperates with the outer side surface of the second hooking portion 632 to limit the second hooking portion 632, the second arc surface 6311 cooperates with the outer side surface of the first hooking portion 332 to limit the first hooking portion 332, and thus, when the positive pole 3 abuts against the negative pole 6, the first hooking portion 332 and the second hooking portion 632 are separated, so as to ensure the supporting effect of the positive pole 3 and the negative pole 6 on two opposite sides of the housing 1, further prevent the housing 1 from being deformed greatly in the liquid injection process, and affect the appearance and use of the battery.

The above description may be implemented alone or in various combinations and these modifications are within the scope of the present utility model.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting. Although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (10)

1. A battery for preventing deformation of injected liquid, characterized in that: the lithium ion battery comprises a shell (1) with a cavity, a positive pole (3) arranged in the cavity and a negative pole (6) arranged in the cavity, wherein the positive pole (3) is in soft connection with the negative pole (6); in the process of carrying out negative pressure air suction on the cavity, the positive pole column (3) and the negative pole column (6) are mutually abutted to support two opposite side walls of the cavity; during the process of filling the cavity, the positive pole (3) and the negative pole (6) extend outwards to tighten the two opposite side walls of the cavity.

2. A battery for preventing deformation of a liquid filling as set forth in claim 1, wherein: the shell (1) is also provided with a first pole plate (4) for installing the positive pole (3) and a second pole plate (7) for installing the negative pole (6).

3. A battery for preventing deformation of a liquid filling as set forth in claim 2, wherein: a first sealing ring (5) is arranged between the first pole column plate (4) and the positive pole column (3), and a second sealing ring (8) is arranged between the second pole column plate (7) and the negative pole column (6).

4. A battery for preventing deformation of a liquid filling as set forth in claim 2, wherein: the positive pole (3) comprises a first outer connecting part (31) arranged on the first pole plate (4) and a first inner connecting part (32) connected with the negative pole (6), and the first outer connecting part (31) and the first inner connecting part (32) are of an integrated structure.

5. A battery for preventing deformation of a liquid filling as set forth in claim 4, wherein: the negative electrode column (6) comprises a second outer connecting part (61) arranged on the second electrode column plate (7) and a second inner connecting part (62) connected with the first inner connecting part (32), and the second outer connecting part (61) and the second inner connecting part (62) are of an integral structure.

6. A battery for preventing deformation of a liquid filling as set forth in claim 5, wherein: one end of the first inner connecting part (32) far away from the first outer connecting part (31) is provided with a first soft connection (33), one end of the second inner connecting part (62) far away from the second outer connecting part (61) is provided with a second soft connection (63), and the first soft connection (33) is connected with the second soft connection (63).

7. A battery for preventing deformation of a liquid filling as set forth in claim 6, wherein: the first flexible connection (33) comprises a first fixing portion (331) and a first hooking portion (332), the first fixing portion (331) is connected with the first outer connection portion (31) and the first hooking portion (332), the second flexible connection (63) comprises a second fixing portion (631) and a second hooking portion (632), the second fixing portion (631) is connected with the second outer connection portion (61) and the second hooking portion (632), when the positive pole (3) and the negative pole (6) are mutually abutted, the first hooking portion (332) is abutted with the second fixing portion (631), the second hooking portion (632) is abutted with the first fixing portion (331), and when the positive pole (3) and the negative pole (6) are outwards extended, the first hooking portion (332) is hooked with the second hooking portion (632).

8. A battery for preventing deformation of a liquid filling as set forth in claim 7, wherein: the first fixing portion (331) is provided with a first arc surface (3311) matched with the outer side surface of the second hooking portion (632), and the second fixing portion (631) is provided with a second arc surface (6311) matched with the outer side surface of the first hooking portion (332).

9. A battery for preventing deformation of a liquid filling as set forth in claim 1, wherein: one side of the shell (1) is provided with a positive hole (11) for one end of the positive pole (3) to extend out of the cavity, and the other opposite side of the shell (1) is provided with a negative hole (12) for one end of the negative pole (6) to extend out of the cavity.

10. A battery for preventing deformation of a liquid filling as set forth in claim 1, wherein: the battery box comprises a shell (1), and is characterized in that the top of the shell (1) is provided with an opening, the battery box further comprises a cover plate (2) for closing or opening the opening of the top of the shell (1), and the cover plate (2) is provided with a liquid injection hole (21) for injecting liquid into the cavity.