A battery and battery pack with pressure-sensitive valve-regulated refill compensation

Abstract

This invention provides a battery and battery pack with pressure-sensitive valve-regulated refill compensation, including a cover, an outer shell, and electrode cores. At least one pressure-sensitive valve-regulated device is mounted on the cover. The cover and outer shell encapsulate the electrode cores and the pressure-sensitive valve-regulated device internally. The pressure-sensitive valve-regulated device has a receiving cavity that stores refill material. When the receiving cavity is compressed due to an increase in battery internal pressure, the refill material is squeezed out and flows into the electrode cores. This allows for refilling of the battery, thereby extending battery life, maintaining sustained battery power, and reducing operating costs.

Description

Technical Field

[0001] This utility model relates to the fields of battery packaging design and automatic electrolyte compensation design, and in particular to a battery and battery pack with pressure-sensitive valve-controlled replenishment compensation. Background Technology

[0002] With the advancement of electrification, the application of new energy batteries is becoming increasingly widespread, from passenger cars and commercial vehicles to heavy-duty trucks, ships, and aerospace. The demand for long-term use inevitably poses a significant challenge to the durability of new energy batteries. Currently, the cycle life of lithium iron phosphate / ternary lithium batteries is approximately 2,000 to 3,000 cycles, with an estimated warranty life of 8 years / 160,000 kilometers. Designing new energy batteries with a lifespan of 10 years / 240,000 kilometers (or higher) is currently very difficult and is a pressing technical challenge that needs to be addressed.

[0003] Analysis of the battery during cycling revealed that the core reason for battery degradation is the reduction of active lithium ions, while other components remain intact. If the corresponding active lithium can be gradually replenished during cycling, its lifespan and service time can be significantly extended. Utility Model Content

[0004] Based on the above, this utility model provides a battery and battery pack with pressure-sensitive valve-controlled refill compensation, aiming to solve technical problems such as the need to improve the service life of existing batteries.

[0005] A battery with pressure-sensitive valve-controlled refill compensation includes a cover, a housing, and an electrode core. At least one pressure-sensitive valve-controlled device is mounted on the cover, and the cover and housing encapsulate the electrode core and the pressure-sensitive valve-controlled device internally.

[0006] Pressure-sensitive valve-controlled devices have a receiving cavity that stores a supplement. When the receiving cavity is compressed due to an increase in the internal pressure of the battery, the supplement is squeezed out and flows into the electrode core.

[0007] Furthermore, a pressure-sensitive spring is provided in a portion of the receiving cavity of the pressure-sensitive valve-controlled device; at least one liquid outlet is also provided on the receiving cavity of the pressure-sensitive valve-controlled device, and an expansion valve is installed in each liquid outlet.

[0008] Furthermore, the expansion valve includes an expansion valve housing, an expansion valve plug, an expansion valve support rod, and an expansion valve spring;

[0009] The outlet is located inside the expansion valve housing;

[0010] The first end of the expansion valve support rod protrudes outside the expansion valve housing through a perforation, and the second end of the expansion valve support rod is connected to the expansion valve plug.

[0011] The expansion valve spring is sleeved on the expansion valve support rod. The first end of the expansion valve spring abuts against the inside of the expansion valve housing, and the second end of the expansion valve spring abuts against the expansion valve plug.

[0012] The expansion valve plug blocks the liquid outlet with the help of the expansion valve spring.

[0013] The expansion valve housing is provided with at least one expansion valve through hole that penetrates the inner wall and the outer wall of the expansion valve housing.

[0014] Furthermore, the central axes of the liquid outlet, expansion valve plug, expansion valve support rod, expansion valve spring, and expansion valve housing are aligned.

[0015] Furthermore, the diameter of the expansion valve housing is larger than the diameter of the expansion valve plug;

[0016] The diameter of the expansion valve plug is larger than the diameter of the outlet.

[0017] The diameter of the outlet is larger than the diameter of the expansion valve spring;

[0018] The diameter of the expansion valve spring is larger than the diameter of the expansion valve support rod.

[0019] Furthermore, the cover includes a base plate, pole posts, and a stop frame;

[0020] The substrate has through holes for pole posts, the pole posts are inserted through the through holes for pole posts, and a stop bracket is sleeved on the outer periphery of the pole posts, with the top of the stop bracket attached to the inner wall of the substrate.

[0021] The pressure-sensitive valve-controlled device and the stop bracket of the cover are installed and fixed.

[0022] Furthermore, the cover also includes a connecting piece, which is welded to the pole post; the pole core includes a pole core body and a pole tab at the upper end of the pole core body, which is welded to the connecting piece.

[0023] Furthermore, a circular platform is formed at the bottom of the pole post;

[0024] The cover also includes an insulating plate, a steel ring and a sealing ring. The insulating plate is sleeved on the outer periphery of the pole post, and part of the insulating plate is inserted into the through hole of the pole post.

[0025] A steel ring is fitted around the outer periphery of the pole post and embedded in the top of the insulating plate;

[0026] The sealing ring is fitted around the outer periphery of the pole post, and is sandwiched between the top surface of the circular platform at the bottom of the pole post and the inner wall of the substrate.

[0027] Furthermore, supplements include electrolytes.

[0028] A battery pack, characterized in that it comprises a battery with pressure-sensitive valve-controlled refill compensation according to any one of the above claims.

[0029] The beneficial technical effects of this utility model are as follows: by designing a pressure-sensitive valve-controlled automatic replenishment technology in the battery, an automatic replenishment technology is realized during battery use, which can replenish the battery, thereby extending the battery service life, maintaining the battery's long-lasting power, and reducing the cost of use. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the external structure of a battery with pressure-sensitive valve-controlled refill compensation according to the present invention.

[0031] Figure 2 This is a cross-sectional view of the battery's vertical wide side (i.e., perpendicular to the battery width) of a battery with pressure-sensitive valve-controlled refill compensation according to this utility model. Figure 1 (in the X direction);

[0032] Figure 3 This is a view (i.e., perpendicular to) the cover and pressure-sensitive valve-controlled device of a battery with pressure-sensitive valve-controlled refill compensation according to the present invention. Figure 1 Y direction);

[0033] Figure 4 This invention relates to a pressure-sensitive valve-controlled refill compensation battery along the battery height direction (i.e., Figure 1 A bottom view of a pressure-sensitive valve-controlled device (in the Z direction);

[0034] Figure 5 This is a cross-sectional view of a battery with pressure-sensitive valve-controlled refill compensation according to the present invention.

[0035] in,

[0036] 1-Cover body; 11-Cover plate base plate; 12-Pole post; 13-Insulating protective component; 14-Steel ring; 15-Insulating plate; 16-Sealing ring; 17-Stop bracket; 18-Connecting piece;

[0037] 2-Outer shell;

[0038] 31-Core body; 32-Electrode tab;

[0039] 4-Pressure-sensitive valve-controlled device; 41-Receiving cavity; 42-Pressure-sensitive spring; 43-Liquid outlet; 44-Expansion valve; 441-Expansion valve housing; 442-Expansion valve plug; 443-Expansion valve support rod; 444-Expansion valve spring; 445-Expansion valve through hole. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0042] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0043] See Figure 1 , Figure 3 and Figure 5 This utility model provides a battery with pressure-sensitive valve-controlled refill compensation, including a cover 1, a shell 2 and an electrode core. The feature is that at least one pressure-sensitive valve-controlled device 4 is installed on the cover 1, and the cover 1 and the shell 2 encapsulate the electrode core and the pressure-sensitive valve-controlled device 4 inside.

[0044] The pressure-sensitive valve-controlled device 4 has a receiving cavity 41, which stores a supplement. When the receiving cavity is compressed due to an increase in the internal pressure of the battery, the supplement is squeezed out and flows into the electrode core.

[0045] Specifically, the casing is made of aluminum. Specifically, the battery of this invention is a cuboid battery. Specifically, the positive and negative terminals of the cuboid battery are at the same end.

[0046] By designing a pressure-sensitive valve-controlled automatic replenishment technology within the battery, automatic fluid replenishment can be achieved during battery use. This allows for precise replenishment of the battery fluid, thereby extending battery life, maintaining long-lasting power, and reducing operating costs.

[0047] See Figure 4 Furthermore, a pressure-sensitive spring 42 is partially provided in the receiving cavity 41 of the pressure-sensitive valve-controlled device 4; at least one liquid outlet 43 is also provided on the receiving cavity 41 of the pressure-sensitive valve-controlled device 4, and an expansion valve 44 is installed in each liquid outlet 43.

[0048] Each pressure-sensitive valve-controlled device 4 can be provided with one or more liquid outlets 43, and each liquid outlet 43 is equipped with an expansion valve 44.

[0049] See Figure 5 Furthermore, the expansion valve 44 includes an expansion valve housing 441, an expansion valve plug 442, an expansion valve support rod 443, and an expansion valve spring 444;

[0050] The outlet 43 is located inside the expansion valve housing 441;

[0051] The first end of the expansion valve support rod 443 is exposed outside the expansion valve housing 441 through the perforation of the expansion valve housing 441, and the second end of the expansion valve support rod 443 is connected to the expansion valve plug 442.

[0052] The expansion valve spring 444 is sleeved on the expansion valve support rod 443. The first end of the expansion valve spring 444 abuts against the inside of the expansion valve housing 441, and the second end of the expansion valve spring 444 abuts against the expansion valve plug 442.

[0053] The expansion valve plug 442 blocks the liquid outlet with the help of the elastic force of the expansion valve spring 444;

[0054] The expansion valve housing 441 is provided with at least one expansion valve through hole 445 that penetrates the inner wall and the outer wall of the expansion valve housing 441.

[0055] Furthermore, the expansion valve plug 442 and the expansion valve support rod 443 are integrated into one unit.

[0056] Furthermore, the central axes of the liquid outlet 43, the expansion valve plug 442, the expansion valve support rod 443, the expansion valve spring 444, and the expansion valve housing 441 are aligned.

[0057] The alignment of the central axis ensures that the supplement in the containment cavity 41 is smoothly released into the electrode core.

[0058] Furthermore, the diameter of the expansion valve housing 441 is larger than the diameter of the expansion valve plug 442;

[0059] The diameter of the expansion valve plug 442 is larger than the diameter of the outlet 43;

[0060] The diameter of the outlet 43 is larger than the diameter of the expansion valve spring 444;

[0061] The diameter of the expansion valve spring 444 is larger than the diameter of the expansion valve support rod 443.

[0062] The diameter of the expansion valve plug 442 is larger than the diameter of the outlet 43 to ensure that the outlet 43 is completely blocked. The diameter of the outlet 43 is larger than the diameter of the expansion valve spring 444 to ensure that the replenishing agent in the receiving cavity is smoothly squeezed out of the outlet.

[0063] Apart from the area where the device connects to the cover plate and the area where the pressure-sensitive spring is located, the outlet 43 and expansion valve 44 of the pressure-sensitive valve-controlled device 4 can be selectively installed in other areas of the pressure-sensitive valve-controlled device 4. The size, shape, and opening orientation of the expansion valve through hole 445 are not restricted.

[0064] The number of pressure-sensitive valve-controlled devices 4 can be one or more. Furthermore, the expansion valve through-hole 445 of the pressure-sensitive valve-controlled device 4 can be set to one or more.

[0065] See Figure 2 Furthermore, the cover 1 includes a base plate 11, an pole post 12, and a stop frame 17;

[0066] The substrate 11 has a through hole for the pole post, the pole post 12 passes through the through hole for the pole post, and the stop bracket 17 is sleeved on the outer periphery of the pole post 12, with the top of the stop bracket 17 attached to the inner wall of the substrate 11.

[0067] The pressure-sensitive valve-controlled device 4 and the stop bracket 17 of the cover 1 are installed and fixed.

[0068] The stop bracket 17 can limit the position of the pole post 12, prevent the positive pole post 12 from shaking, and further improve the stability of the pole post 12.

[0069] Furthermore, the cover 1 also includes a connecting piece 18, which is welded to the pole post 12; the pole core includes a pole core body and a pole tab 32 at the upper end of the pole core body 31, which is welded to the connecting piece 18.

[0070] The pole core is a wound core or a stacked core.

[0071] The pressure-sensitive valve-controlled device 4 is located below the cover 1. The pressure-sensitive valve-controlled device 4 is first installed on the cover 1, then the tab 32 is welded to the connecting piece 18, and finally the battery is encapsulated by welding around the cover 1.

[0072] Furthermore, a bottom circular platform is formed at the bottom of the pole post 12;

[0073] The cover 1 also includes an insulating plate 15, a steel ring 14 and a sealing ring 16. The insulating plate 15 is sleeved on the outer periphery of the pole post 12, and part of the insulating plate 15 is inserted into the through hole of the pole post.

[0074] The steel ring 14 is sleeved on the outer periphery of the pole post 12, and the steel ring 14 is embedded in the top of the insulating plate 15;

[0075] The sealing ring 16 is sleeved on the outer periphery of the pole post 12, and the sealing ring 16 is sandwiched between the top surface of the bottom circular platform of the pole post 12 and the inner wall of the substrate 11.

[0076] The insulating plate 15 is ring-shaped and is sleeved around the outer periphery of the terminal post to protect the battery and prevent short circuits.

[0077] The top of the insulating plate 15 is provided with an annular groove that matches the steel ring 14. The steel ring 14 is embedded in the annular groove to further fix the insulating plate 15 and improve the robustness and reliability of the battery structure.

[0078] The sealing ring 16 is used to prevent electrolyte leakage inside the electrode core, and also to prevent external moisture from entering the battery casing, thereby improving the safety and lifespan of the battery.

[0079] Furthermore, the cover also includes an insulating protective element 13, which is ring-shaped and is sleeved around the outer periphery of the pole post 12, and covers the insulating plate 15 and the steel ring 14.

[0080] Furthermore, the insulating protective component 13 is made of PPS (polyphenylene sulfide).

[0081] The insulating protective component 13 further insulates and protects the battery. It is pressed against the top of the insulating plate 15 and the steel ring 14, making the connection between the components tighter.

[0082] Furthermore, supplements include electrolytes.

[0083] By using automatic electrolyte compensation technology, lost lithium ions in the battery are replenished, achieving non-destructive repair of battery capacity, thereby extending battery service life, maintaining long-lasting battery power, and reducing usage costs.

[0084] Furthermore, the supplements of this invention are not limited to electrolytes, but can also be other types of additives or supplements that can repair batteries and improve battery life, such as EC (ethylene carbonate), VC (ethylene carbonate), FEC (fluoroethylene carbonate), etc.

[0085] Specifically, as one embodiment of this utility model, multiple types of supplements are mixed in the receiving cavity 41 of the same pressure-sensitive valve-controlled device 4. Alternatively, multiple pressure-sensitive valve-controlled devices 4 can be set in the inner cavity of the battery, each containing its own supplement.

[0086] The pressure-sensitive valve-controlled device 4 stores the required replenishment in its receiving cavity 41. As the battery undergoes cycling, side reactions occur, increasing the internal pressure. This pressure, through the pressure-sensitive spring 42, compresses the receiving cavity 41, forcing the replenishment out through the outlet 43. The replenishment then flows through the expansion valve orifice 445 of the expansion valve 44 and finally enters the battery core, enhancing battery lifespan. When the battery's initial internal pressure is low, the expansion valve plug 442 seals against the outlet 43 due to the action of the expansion valve spring 444, protecting the replenishment stored in the receiving cavity 41 from external influences and side reactions. This technology enables in-situ, non-destructive replenishment of the battery, significantly extending its lifespan and service time.

[0087] This utility model also provides a battery pack composed of the aforementioned battery with pressure-sensitive valve-controlled refill compensation.

[0088] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A battery with pressure-sensitive valve-regulated refill compensation, comprising a cover, a casing, and an electrode core, characterized in that, At least one pressure-sensitive valve-controlled device is installed on the cover, and the cover and the outer shell encapsulate the electrode core and the pressure-sensitive valve-controlled device inside; The pressure-sensitive valve-controlled device has a receiving cavity in which a supplement is stored. When the receiving cavity is compressed due to an increase in the internal pressure of the battery, the supplement is squeezed out and flows into the electrode core.

2. The battery with pressure-sensitive valve-controlled refill compensation as described in claim 1, characterized in that, The receiving cavity of the pressure-sensitive valve-controlled device is partially provided with a pressure-sensitive spring; the receiving cavity of the pressure-sensitive valve-controlled device is also provided with at least one liquid outlet, and each liquid outlet is equipped with an expansion valve.

3. A battery with pressure-sensitive valve-controlled refill compensation as described in claim 2, characterized in that, The expansion valve includes an expansion valve housing, an expansion valve plug, an expansion valve support rod, and an expansion valve spring; The liquid outlet is located inside the expansion valve housing; The first end of the expansion valve support rod protrudes outside the expansion valve housing through a perforation, and the second end of the expansion valve support rod is connected to the expansion valve plug. The expansion valve spring is sleeved on the expansion valve support rod, with the first end of the expansion valve spring abutting against the inside of the expansion valve housing and the second end of the expansion valve spring abutting against the expansion valve plug; The expansion valve plug blocks the liquid outlet by means of the elastic force of the expansion valve spring; The expansion valve housing is provided with at least one expansion valve through hole that penetrates the inner wall and the outer wall of the expansion valve housing.

4. A battery with pressure-sensitive valve-controlled refill compensation as described in claim 3, characterized in that, The central axes of the liquid outlet, the expansion valve plug, the expansion valve support rod, the expansion valve spring, and the expansion valve housing are aligned.

5. A battery with pressure-sensitive valve-controlled refill compensation as described in claim 4, characterized in that, The diameter of the expansion valve housing is larger than the diameter of the expansion valve plug; The diameter of the expansion valve plug is larger than the diameter of the liquid outlet; The diameter of the liquid outlet is larger than the diameter of the expansion valve spring; The diameter of the expansion valve spring is larger than the diameter of the expansion valve support rod.

6. A battery with pressure-sensitive valve-controlled refill compensation as described in claim 1, characterized in that, The cover includes a base plate, pole posts, and a stop frame; The substrate has an electrode through hole, the electrode is inserted through the electrode through hole, the stop bracket is sleeved on the outer periphery of the electrode, and the top of the stop bracket is attached to the inner wall of the substrate. The pressure-sensitive valve-controlled device and the stop bracket of the cover are installed and fixed.

7. A battery with pressure-sensitive valve-controlled refill compensation as described in claim 6, characterized in that, The cover also includes a connecting piece, which is welded to the pole post; the pole core includes a pole core body and a tab at the upper end of the pole core body, which is welded to the connecting piece.

8. A battery with pressure-sensitive valve-controlled refill compensation as described in claim 6, characterized in that, The bottom of the pole post has a bottom circular platform; The cover also includes an insulating plate, a steel ring and a sealing ring. The insulating plate is sleeved on the outer periphery of the pole post, and part of the insulating plate is inserted into the through hole of the pole post. The steel ring is sleeved around the outer periphery of the pole post, and the steel ring is embedded in the top of the insulating plate; The sealing ring is sleeved on the outer periphery of the pole post, and the sealing ring is sandwiched between the top surface of the bottom circular platform of the pole post and the inner wall of the substrate.

9. A battery with pressure-sensitive valve-controlled refill compensation as described in claim 1, characterized in that, The supplement includes an electrolyte.

10. A battery pack, characterized in that, It consists of a battery with pressure-sensitive valve-controlled refill compensation as described in any one of claims 1-9.

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