Square power battery liquid injection clamp

Abstract

The utility model discloses a square power battery liquid injection clamp, which comprises a lower clamp assembly, an upper clamp assembly and a lower clamp assembly, the lower clamp assembly comprises a lower clamp main body, the top of the lower clamp main body is provided with a plurality of first accommodating cavities, the first accommodating cavities are provided with protective sleeves, and the protective sleeves are used for sleeving batteries; the upper clamp assembly comprises an upper clamp main body and a plurality of liquid injection cups arranged on the lower clamp main body, a plurality of second containing cavities are formed in the bottom of the upper clamp main body, the second containing cavities and the first containing cavities are matched to form a closed cavity, liquid injection nozzles are arranged at the bottoms of the liquid injection cups and correspond to liquid injection openings of the batteries, and the liquid injection openings of the batteries are communicated with the closed cavity. The top of the liquid injection cup is provided with an internal pressurizing nozzle, the upper clamp body is provided with an external pressurizing nozzle, and the external pressurizing nozzle is communicated with the second containing cavity. According to the utility model, the internal pressure and the external pressure of the battery can be kept balanced, meanwhile, the periphery of the battery can be limited, the deformation of a shell of the battery is avoided, and the qualification rate of the battery in a liquid injection process is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery liquid injection clamp technology, specifically to a square power battery liquid injection clamp. Background Technology

[0002] During the battery production process, electrolyte needs to be injected into the battery. After the battery is injected, it is left to stand for a period of time to allow the electrolyte to be fully absorbed.

[0003] To accelerate the electrolyte injection efficiency of the battery, high-pressure static stabilization is generally used inside the battery, specifically by introducing high-pressure gas into the battery.

[0004] However, the existing square battery casings are generally only 0.5mm thick, or even thinner. During the high-pressure static process, the pressure difference between the inside and outside of the battery is large, and the battery casing is prone to bulging and deformation, resulting in a high scrap rate of the battery during the liquid filling process. Utility Model Content

[0005] To overcome the shortcomings of the existing technology, this utility model provides a square power battery liquid injection clamp, which can keep the internal and external pressure of the battery balanced. At the same time, it can limit the battery around its perimeter to prevent the battery casing from deforming and improve the pass rate of the battery in the liquid injection process.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A square power battery liquid injection clamp, comprising:

[0008] The lower clamp assembly includes a lower clamp body and a first latch disposed on the side of the lower clamp body. The top of the lower clamp body is provided with a plurality of first cavities, which are used to hold batteries.

[0009] The upper clamp assembly includes an upper clamp body, a plurality of liquid injection cups disposed on the lower clamp body, and a second latch disposed on the side of the upper clamp body. The bottom of the upper clamp body is provided with a plurality of second cavities, and the plurality of liquid injection cups correspond one-to-one with the plurality of second cavities. The plurality of second cavities correspond one-to-one with the plurality of first cavities. The bottom of the liquid injection cup is provided with a liquid injection nozzle, which corresponds to the liquid injection port of the battery. The top of the liquid injection cup is provided with an internal pressure nozzle, and the upper clamp body is provided with an external pressure nozzle, which communicates with the second cavity.

[0010] When the first latch and the second latch are engaged, the first cavity and the second cavity cooperate to form a closed cavity for accommodating the battery.

[0011] As a further improvement to the above technical solution, a protective sleeve is provided on the first cavity, and the protective sleeve is used to attach the battery.

[0012] As a further improvement to the above technical solution, the protective sleeve includes a base plate, two first side guards and two second side guards disposed on the edge of the base plate, the two first side guards being disposed opposite to each other, and the two second side guards being disposed opposite to each other.

[0013] As a further improvement to the above technical solution, the top of the lower clamp body is provided with a plurality of first sealing grooves, and a first sealing ring is installed in the first sealing groove. The first sealing groove is located on the outer periphery of the opening end of the first cavity.

[0014] As a further improvement to the above technical solution, the top of the lower clamp body is provided with at least two positioning pins, and the bottom of the upper clamp body is provided with positioning holes corresponding to the positioning pins, and the positioning pins cooperate with the positioning holes.

[0015] As a further improvement to the above technical solution, the top of the injection cup is also provided with an inlet valve, which is a self-sealing structure.

[0016] As a further improvement to the above technical solution, the inlet valve includes a valve body, a valve core, and an elastic component. The valve body has a through hole inside, the valve core is slidably connected in the through hole, the elastic component is disposed between the valve core and the valve body, the valve body is installed on the top of the injection cup, the valve core has an inlet channel inside, an inlet is disposed on the top of the valve core, and an outlet is disposed on the side of the valve core.

[0017] When downward pressure is applied to the valve core, the valve core descends, and the liquid outlet communicates with the liquid injection cup;

[0018] When the downward pressure applied to the valve core is removed, the elastic component causes the valve core to rise, and the outlet is blocked by the valve body.

[0019] As a further improvement to the above technical solution, the elastic component includes a first spring sleeve, a second spring sleeve, and a compression spring. The first spring sleeve is disposed on the valve core, the second spring sleeve is disposed on the valve body, one end of the compression spring is connected to the first spring sleeve, and the other end of the compression spring is connected to the second spring sleeve.

[0020] As a further improvement to the above technical solution, a second sealing groove is provided at the top of the injection cup, and a second sealing ring is installed in the second sealing groove, the second sealing ring abutting against the bottom of the valve body.

[0021] As a further improvement to the above technical solution, the inner wall of the valve body is provided with a third sealing groove, and a third sealing ring is installed in the third sealing groove. The outer periphery of the valve core is provided with a fourth sealing groove, and a fourth sealing ring is installed in the fourth sealing groove. The fourth sealing groove is located below the liquid outlet.

[0022] The beneficial effects of this utility model are:

[0023] 1. This utility model provides a square power battery liquid injection clamp. By setting an internal pressure nozzle and an external pressure nozzle, high-pressure gas is injected into the internal pressure nozzle to increase the internal pressure of the battery. At the same time, high-pressure gas is injected into the external pressure nozzle to increase the pressure of the sealed cavity. Thus, the internal and external pressures of the battery can be kept in balance, avoiding deformation of the battery shell and improving the pass rate of the battery in the liquid injection process.

[0024] 2. The utility model provides a square power battery liquid injection clamp. By setting a protective sleeve, the protective sleeve includes a base plate, two first side guards and two second side guards set on the edge of the base plate. The base plate can support the battery, and the two first side guards and two second side guards respectively limit the four sides of the battery, thereby preventing the battery shell from bulging and deforming outward. Attached Figure Description

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

[0026] Figure 1 This is a structural schematic diagram provided by an example of this utility model;

[0027] Figure 2 This is a cross-sectional view of the present invention;

[0028] Figure 3 yes Figure 2 Cross-sectional view of the upper and middle clamping assembly;

[0029] Figure 4 yes Figure 1 Exploded view of the lower clamp assembly and battery;

[0030] Figure 5 yes Figure 1 Exploded view of the injection cup;

[0031] Figure 6 yes Figure 1 Cross-sectional view of the injection cup;

[0032] Figure 7 This is a cross-sectional view of the inlet valve in the closed state;

[0033] Figure 8 This is a cross-sectional view of the inlet valve in the on state.

[0034] Reference numerals: 100-lower clamp assembly, 110-lower clamp body, 111-first sealing groove, 112-first sealing ring, 113-positioning pin, 120-first latch, 130-first cavity, 140-protective sleeve, 141-bottom plate, 142-first side guard plate, 143-second side guard plate;

[0035] Upper clamp assembly, 210-Upper clamp body, 211-Positioning hole, 220-Injection cup, 221-Injection nozzle, 222-Second sealing groove, 223-Second sealing ring, 230-Second latch, 240-Second cavity, 250-Internal pressure nozzle, 260-External pressure nozzle, 270-Inlet valve, 271-Valve body, 272-Valve core, 273-Elastic component, 2711-Third sealing groove, 2712-Third sealing ring, 2721-Inlet channel, 2722-Inlet, 2723-Outlet, 2731-First spring sleeve, 2732-Second spring sleeve, 2733-Compression spring, 2724-Fourth sealing groove, 2725-Fourth sealing ring; 300-Battery. Detailed Implementation

[0036] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.

[0037] Reference Figures 1 to 6 An example of this utility model provides a liquid injection clamp for a square power battery 300, which includes a lower clamp assembly 100 and an upper clamp assembly 200.

[0038] Structurally, the lower clamp assembly 100 includes a lower clamp body 110 and a first latch 120 disposed on the side of the lower clamp body 110. The top of the lower clamp body 110 is provided with a plurality of first cavities 130, which are used to hold the battery 300.

[0039] Furthermore, the upper clamp assembly 200 includes an upper clamp body 210, a plurality of liquid injection cups 220 disposed on the lower clamp body 110, and a second latch 230 disposed on the side of the upper clamp body 210. The bottom of the upper clamp body 210 is provided with a plurality of second cavities 240, and the plurality of liquid injection cups 220 correspond one-to-one with the plurality of second cavities 240. The plurality of second cavities 240 correspond one-to-one with the plurality of first cavities 130. The bottom of the liquid injection cup 220 is provided with a liquid injection nozzle 221, which corresponds to the liquid injection port of the battery 300. The top of the liquid injection cup 220 is provided with an internal pressure nozzle 250, and the upper clamp body 210 is provided with an external pressure nozzle 260, which communicates with the second cavities 240.

[0040] Specifically, when the first latch 120 and the second latch 230 are engaged, the first cavity 130 and the second cavity 240 cooperate to form a closed cavity for housing the battery 300. At this time, the injection nozzle 221 of the injection cup 220 is inserted into the injection port of the battery 300. By injecting high-pressure gas into the internal pressure nozzle 250, the internal pressure of the battery 300 is increased. At the same time, by injecting high-pressure gas into the external pressure nozzle 260, the pressure of the closed cavity is increased. Thus, the internal and external pressures of the battery 300 can be kept in balance, preventing the casing of the battery 300 from deforming and improving the pass rate of the battery 300 in the injection process.

[0041] In some preferred embodiments, a protective sleeve 140 is provided on the first cavity 130. The protective sleeve 140 is used to attach the battery 300 and can protect the outer casing of the battery 300.

[0042] Specifically, the protective cover 140 includes a base plate 141, two first side guards 142 and two second side guards 143 disposed on the edge of the base plate 141. The two first side guards 142 are disposed opposite to each other, and the two second side guards 143 are disposed opposite to each other. The base plate 141 can support the battery 300. The two first side guards 142 and the two second side guards 143 respectively limit the perimeter of the battery 300, thereby preventing the outer casing of the battery 300 from bulging and deforming outward.

[0043] In some preferred embodiments, the top of the lower clamp body 110 is provided with a plurality of first sealing grooves 111, and a first sealing ring 112 is installed in the first sealing groove 111. The first sealing groove 111 is located on the outer periphery of the opening end of the first cavity 130. When the lower clamp body 110 is engaged with the upper clamp body 210, the first sealing ring 112 abuts against the bottom of the upper clamp body 210, thereby improving the sealing performance of the closed cavity.

[0044] In some preferred embodiments, the lower clamp body 110 is provided with at least two positioning pins 113 at its top, and the upper clamp body 210 is provided with positioning holes 211 corresponding to the positioning pins 113 at its bottom. The positioning pins 113 cooperate with the positioning holes to ensure that the upper clamp body 210 and the lower clamp body 110 can be accurately aligned when they are engaged, thereby avoiding misalignment between the first cavity 130 and the second cavity 240 and ensuring the positional accuracy of the first cavity 130 and the second cavity 240.

[0045] In some preferred embodiments, the top of the injection cup 220 is also provided with an inlet valve 270. The inlet valve 270 is a self-sealing structure. During the injection process, the inlet valve 270 is connected to the inside of the injection cup 220. When the injection stops, the inlet valve 270 is disconnected from the inside of the injection cup 220. Thus, the sealing of the injection cup 220 can be guaranteed during the transportation process to prevent electrolyte from overflowing.

[0046] Reference Figure 7 and Figure 8 Structurally, the inlet valve 270 includes a valve body 271, a valve core 272, and an elastic component 273. The valve body 271 has a through hole inside, and the valve core 272 is slidably connected in the through hole. The elastic component 273 is disposed between the valve core 272 and the valve body 271. The valve body 271 is installed on the top of the injection cup 220. The valve core 272 has an inlet channel 2721 inside, an inlet port 2722 on the top of the valve core 272, and an outlet port 2723 on the side of the valve core 272.

[0047] When the liquid dispensing mechanism (not shown in the attached figure) applies downward pressure to the valve core 272, the valve core 272 descends, and the liquid outlet 2723 connects with the liquid filling cup 220. The electrolyte enters the liquid inlet channel 2721 from the liquid inlet 2722, and then enters the liquid filling cup 220 through the liquid outlet 2723. Finally, it is injected into the battery 300 from the liquid filling nozzle 221 at the bottom of the liquid filling cup 220, thereby realizing the liquid filling of the battery 300.

[0048] When the dispensing mechanism removes the downward pressure applied to the valve core 272, the elastic component 273 drives the valve core 272 to rise, and the outlet 2723 is blocked by the valve body 271, thereby enabling the inside of the dispensing cup 220 to be in a sealed state.

[0049] Specifically, the elastic component 273 includes a first spring sleeve 2731, a second spring sleeve 2732, and a compression spring 2733. The first spring sleeve 2731 is disposed on the valve core 272, and the second spring sleeve 2732 is disposed on the valve body 271. One end of the compression spring 2733 is connected to the first spring sleeve 2731, and the other end of the compression spring 2733 is connected to the second spring sleeve 2732. When the dispensing mechanism applies downward pressure to the valve core 272, the downward pressure exerted by the dispensing mechanism on the valve core 272 is greater than the elastic force of the compression spring 2733, causing the valve core 272 to descend. At the same time, the compression spring 2733 is compressed. When the dispensing mechanism removes the downward pressure applied to the valve core 272, the elastic force of the compression spring 2733 acts on the valve core 272, causing the valve core 272 to rise automatically. Thus, the valve core 272 can automatically rebound without the need for an additional drive device, saving energy consumption of the equipment.

[0050] In some preferred embodiments, a second sealing groove 222 is provided on the top of the injection cup 220, and a second sealing ring 223 is installed in the second sealing groove 222. The second sealing ring 223 abuts against the bottom of the valve body 271, thereby improving the sealing performance between the valve body 271 and the injection cup 220.

[0051] Furthermore, the inner wall of the valve body 271 is provided with a third sealing groove 2711, and a third sealing ring 2712 is installed in the third sealing groove 2711. The third sealing ring 2712 can seal the valve core 272 and the valve body 271 to prevent gas or liquid in the injection cup 220 from overflowing from the valve core 272 and the valve body 271.

[0052] Furthermore, a fourth sealing groove 2724 is provided on the outer periphery of the valve core 272, and a fourth sealing ring 2725 is installed in the fourth sealing groove 2724. The fourth sealing groove 2724 is located below the liquid outlet 2723. When the valve core 272 descends, the fourth sealing ring 2725 separates from the valve body 271. When the valve core 272 rises, the fourth sealing ring 2725 abuts against the inner wall of the valve body 271. Thus, it is possible to prevent gas or liquid in the injection cup 220 from flowing from between the valve core 272 and the valve body 271 to the liquid outlet 2723.

[0053] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A square power battery liquid injection clamp, characterized in that, include: The lower clamp assembly includes a lower clamp body and a first latch disposed on the side of the lower clamp body. The top of the lower clamp body is provided with a plurality of first cavities, which are used to hold batteries. The upper clamp assembly includes an upper clamp body, a plurality of liquid injection cups disposed on the lower clamp body, and a second latch disposed on the side of the upper clamp body. The bottom of the upper clamp body is provided with a plurality of second cavities, and the plurality of liquid injection cups correspond one-to-one with the plurality of second cavities. The plurality of second cavities correspond one-to-one with the plurality of first cavities. The bottom of the liquid injection cup is provided with a liquid injection nozzle, which corresponds to the liquid injection port of the battery. The top of the liquid injection cup is provided with an internal pressure nozzle, and the upper clamp body is provided with an external pressure nozzle, which communicates with the second cavity. When the first latch and the second latch are engaged, the first cavity and the second cavity cooperate to form a closed cavity for accommodating the battery.

2. The square power battery liquid injection clamp according to claim 1, characterized in that, A protective sleeve is provided on the first cavity, and the protective sleeve is used to attach the battery.

3. A square power battery liquid injection clamp according to claim 2, characterized in that, The protective sleeve includes a base plate, two first side guards and two second side guards disposed on the edge of the base plate, the two first side guards being disposed opposite to each other, and the two second side guards being disposed opposite to each other.

4. A square power battery liquid injection clamp according to claim 1, characterized in that, The top of the lower clamp body is provided with a plurality of first sealing grooves, and a first sealing ring is installed in the first sealing groove. The first sealing groove is located on the outer periphery of the opening end of the first cavity.

5. A square power battery liquid injection clamp according to claim 1, characterized in that, The lower clamp body has at least two positioning pins on its top, and the upper clamp body has positioning holes corresponding to the positioning pins on its bottom, with the positioning pins engaging with the positioning holes.

6. A square power battery liquid injection clamp according to claim 1, characterized in that, The top of the injection cup is also equipped with an inlet valve, which is a self-sealing structure.

7. A square power battery liquid injection clamp according to claim 6, characterized in that, The inlet valve includes a valve body, a valve core, and an elastic component. The valve body has a through hole inside, the valve core is slidably connected in the through hole, the elastic component is disposed between the valve core and the valve body, the valve body is installed on the top of the injection cup, the valve core has an inlet channel inside, an inlet is disposed on the top of the valve core, and an outlet is disposed on the side of the valve core. When downward pressure is applied to the valve core, the valve core descends, and the liquid outlet communicates with the liquid injection cup; When the downward pressure applied to the valve core is removed, the elastic component causes the valve core to rise, and the outlet is blocked by the valve body.

8. A square power battery liquid injection clamp according to claim 7, characterized in that, The elastic component includes a first spring sleeve, a second spring sleeve, and a compression spring. The first spring sleeve is disposed on the valve core, the second spring sleeve is disposed on the valve body, one end of the compression spring is connected to the first spring sleeve, and the other end of the compression spring is connected to the second spring sleeve.

9. A square power battery liquid injection clamp according to claim 7, characterized in that, The top of the injection cup is provided with a second sealing groove, and a second sealing ring is installed in the second sealing groove. The second sealing ring abuts against the bottom of the valve body.

10. A square power battery liquid injection clamp according to claim 7, characterized in that, The inner wall of the valve body is provided with a third sealing groove, and a third sealing ring is installed in the third sealing groove. The outer periphery of the valve core is provided with a fourth sealing groove, and a fourth sealing ring is installed in the fourth sealing groove. The fourth sealing groove is located below the liquid outlet.

Images