Lithium battery energy storage battery pack facilitating routine maintenance management

Abstract

The application discloses a lithium battery energy storage battery pack convenient for daily maintenance management, which comprises a shell and a plurality of rowed battery cell assemblies accommodated in the shell, and the plurality of rowed battery cell assemblies are arranged in sequence and closely adjacent to each other in a horizontal plane; each battery cell assembly is provided with a plurality of battery cell monomers, and each battery cell monomer is provided with an explosion-proof waterproof breather valve; each battery cell assembly is correspondingly provided with a pressure relief breather device, the pressure relief breather device is provided with a pressure relief breather channel penetrating through the shell, and the explosion-proof waterproof breather valve on each battery cell monomer is located in the pressure relief breather channel. The lithium battery energy storage battery pack convenient for daily maintenance management can conveniently and quickly maintain a plurality of explosion-proof waterproof breather valves in the battery pack without removing relevant components.

Description

Technical Field

[0001] This invention relates to the field of new energy battery technology, and in particular to a lithium battery energy storage pack that is easy to maintain and manage in daily use. Background Technology

[0002] Existing technology (CN 206159577 U) discloses an explosion-proof, waterproof, and breathable valve, including a hollow valve body and a piston rod. The hollow valve body includes a connecting end and a plug-in end that are interconnected. The connecting end is connected to the equipment housing via a waterproof ring. The piston rod includes a hollow rod body and a fixing plate disposed at one end of the rod body and communicating with the rod body. A waterproof and breathable membrane is provided on the surface of the fixing plate. A spring is sleeved on the lower end of the hollow rod body and fixed inside the plug-in end of the hollow valve body by the spring insertion. A waterproof ring is provided between the plug-in end and the piston rod. By providing a waterproof and breathable membrane on the surface of the fixing plate of the piston rod, moisture, dust, etc., are effectively prevented from entering. When the pressure inside the equipment cavity is greater than or equal to a certain value, the internal pressure overcomes the pressure of the spring, pushing the piston rod outward. Gas is then directly connected to the outside, achieving rapid pressure relief, thereby quickly reducing the internal pressure of the equipment cavity and preventing the equipment cavity from exploding, effectively ensuring the safety of the equipment cavity.

[0003] The aforementioned explosion-proof, waterproof, and breathable valve is mainly used in energy storage battery packs. Under normal circumstances, the internal and external gases circulate through the waterproof and breathable membrane to achieve stable gas pressure. When the battery experiences thermal runaway, the internal gas pushes the piston rod outward to achieve rapid pressure relief.

[0004] Typically, to improve the airtightness of explosion-proof and waterproof vent valves, the industry practice is to install waterproof rings at the joints of moving parts (such as the piston rod). While waterproof rings improve airtightness, they also bring corresponding drawbacks. For example, during long-term use, the waterproof rings can age and stick due to the complex environment inside the battery pack, making the related moving parts prone to jamming, leading to pressure relief failure, which is extremely dangerous. Furthermore, during long-term use, the piston rod can also easily jam against the valve body, causing obstructed piston rod movement. When severe obstruction occurs, the explosion-proof and waterproof vent valve needs to be replaced or repaired promptly.

[0005] Therefore, regular maintenance of the explosion-proof and waterproof vent valves is necessary. This includes pushing and pulling the moving parts, which in turn moves the waterproof ring on top, preventing it from sticking stubbornly. However, energy storage battery packs typically contain several individual battery cells stacked on top of each other. Maintaining the explosion-proof and waterproof vent valve on each individual battery cell is no easy task; it involves a huge amount of work and is fraught with difficulties.

[0006] Therefore, the technical problem that needs to be solved is how to design and develop a lithium battery energy storage pack that is easy to maintain and manage in daily life, and how to conveniently and quickly maintain the multiple explosion-proof, waterproof and breathable valves inside the battery pack without removing related components. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a lithium battery energy storage pack that is easy to maintain and manage in daily life. Multiple explosion-proof, waterproof and breathable valves inside the battery pack can be easily and quickly maintained without removing related components.

[0008] The objective of this invention is achieved through the following technical solution:

[0009] A lithium battery energy storage pack that is easy to maintain and manage in daily use includes a housing and multiple rows of battery cell assemblies housed within the housing. The multiple rows of battery cell assemblies are arranged adjacent to each other in a horizontal plane. Each battery cell assembly has a plurality of individual battery cells, and each individual battery cell is provided with an explosion-proof and waterproof vent valve. Each battery cell assembly is provided with a corresponding pressure relief and venting device, which has a pressure relief and venting channel penetrating the housing. The explosion-proof and waterproof vent valve on each individual battery cell is located within the pressure relief and venting channel.

[0010] In one embodiment,

[0011] The pressure relief and ventilation device includes: a fixed base, a sliding rod slidably disposed on the fixed base, and an elastic element for providing elastic restoring force to the sliding rod;

[0012] The explosion-proof, waterproof, and breathable valve includes: a hollow valve body, a piston rod, and a tension spring; the hollow valve body has a sealing end, and a waterproof ring is provided on the sealing end; the hollow valve body is pressed against the sealing end by the elastic restoring force provided by the tension spring; a lifting handle located outside the hollow valve body is provided on the piston rod.

[0013] The sliding rod includes a sliding rail and a left wing and a right wing fixed on the sliding rail; the left wing and the right wing are spaced apart to form a clamping channel, and a plurality of explosion-proof, waterproof and breathable valves in each of the battery cell assemblies are located in the clamping channel;

[0014] The left and right wingspans are respectively provided with a plurality of left wedge blocks and a plurality of right wedge blocks at intervals along their respective extension lines, and the lifting handle contacts or separates from the corresponding left and right wedge blocks.

[0015] In one embodiment, an external force is applied to move the sliding rod to one side, causing the left and right wedge blocks to contact and pull up the corresponding lifting handles; when the external force is removed, the elastic restoring force of the elastic element causes the sliding rod to move in the opposite direction, separating the left and right wedge blocks from the corresponding lifting handles, and the lifting handles return to their original position.

[0016] In one embodiment, the lifting handle is a cylindrical structure that is wide at both ends and narrow in the middle, and the middle part of the lifting handle forms a clamping groove through an arc transition.

[0017] In one embodiment, the fixed base has a linear guide groove, and the sliding rail is slidably disposed on the linear guide groove.

[0018] In one embodiment, the elastic element is a cylindrical spring structure.

[0019] In one embodiment, a pressure relief vent is provided on the side wall of the housing, corresponding to the pressure relief venting channel.

[0020] In one embodiment, the housing is provided with multiple layers of battery cells, which are stacked sequentially in a vertical direction, and each battery cell layer includes multiple rows of battery cell assemblies arranged in close succession.

[0021] The present invention provides a lithium battery energy storage pack that is easy to maintain and manage in daily life. It allows for convenient and quick maintenance of multiple explosion-proof, waterproof, and breathable valves inside the battery pack without the need to remove related components. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is an assembly diagram of a lithium battery energy storage battery pack that is easy to maintain and manage according to an embodiment of the present invention;

[0024] Figure 2 for Figure 1 The diagram shows the internal structure of a lithium battery energy storage pack that facilitates daily maintenance and management.

[0025] Figure 3 for Figure 2 The diagram shows a structure in which multiple rows of battery cells are arranged side by side on a horizontal plane.

[0026] Figure 4for Figure 3 An exploded view of the multi-row battery cell assembly shown;

[0027] Figure 5 for Figure 3 A partial view of one of the battery cell assemblies shown;

[0028] Figure 6 for Figure 4 An exploded view of the pressure relief and ventilation device shown;

[0029] Figure 7 for Figure 6 The diagram shows the structure of the sliding rod.

[0030] Figure 8 for Figure 4 The diagram shown is a structural diagram of an explosion-proof, waterproof, and breathable valve.

[0031] Figure 9 This is a schematic diagram of applying an external force to the sliding rod. Detailed Implementation

[0032] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] Please refer to the following: Figure 1 , Figure 2 and Figure 3 This invention discloses a lithium battery energy storage pack 10 that is easy to maintain and manage in daily life. It includes a housing 20 and multiple rows of battery cell assemblies 30 housed within the housing 20. The multiple rows of battery cell assemblies 30 are arranged sequentially and adjacently on a horizontal plane (e.g., ...). Figure 3 (As shown). Of course, depending on design requirements, multiple layers of battery cells can also be provided inside the housing 20, with the multiple battery cell layers stacked sequentially along the vertical direction (e.g. Figure 2 As shown in the figure, each cell layer includes multiple rows of cell assemblies 30 arranged in close succession.

[0036] like Figure 4 As shown, each battery cell assembly 30 has several individual battery cells 100, and each individual battery cell 100 is provided with an explosion-proof, waterproof, and breathable valve 200.

[0037] Each cell assembly 30 is equipped with a corresponding pressure relief and venting device 300 (e.g., Figure 4 As shown), the pressure relief and venting device 300 has a pressure relief and venting channel 301 that penetrates the housing (as shown). Figure 5 As shown), the explosion-proof and waterproof vent valve 200 on each battery cell 100 is located within the pressure relief and venting channel 301 (as shown). Figure 5 (As shown). In this embodiment, a pressure relief vent 21 corresponding to the pressure relief vent channel 301 is provided on the side wall of the housing 20 (as shown). Figure 1 As shown, in order to achieve better dust prevention, a dust cover can be installed at the pressure relief vent 21. When routine maintenance and management of the battery pack is required, the dust cover can be removed.

[0038] The specific structure of the explosion-proof and waterproof ventilator 200 and the pressure relief and ventilator 300 described above will be explained below:

[0039] like Figure 5 and Figure 6 As shown, the pressure relief and ventilation device 300 includes: a fixed base 310, a sliding rod 320 slidably disposed on the fixed base 310, and an elastic element 330 (e.g., an elastic restoring force for the sliding rod 320) for providing elastic restoring force to the sliding rod 320. Figure 9 (As shown). In this embodiment, the elastic element 330 is a cylindrical spring. Of course, the elastic element 330 can also be other structures that can provide elastic restoring force to the sliding rod 320.

[0040] like Figure 8 As shown, the explosion-proof, waterproof, and breathable valve 200 includes: a hollow valve body 210, a piston rod 220, and a tension spring 230. The hollow valve body 210 has a sealing end 211, on which a waterproof ring 240 is provided. The hollow valve body 210 is pressed against the sealing end 211 by the elastic restoring force provided by the tension spring 230. The piston rod 220 has a pull handle 250 located outside the hollow valve body 210.

[0041] like Figure 6 and Figure 7As shown, the sliding rod 320 includes a sliding rail 321 and a left wing 322 and a right wing 323 fixed to the sliding rail 321. A clamping channel 324 is formed between the left wing 322 and the right wing 323 at intervals, and several explosion-proof, waterproof, and breathable valves 200 in each battery cell assembly 30 are located in the clamping channel 324. Specifically, a linear guide groove 311 is provided on the fixing base 310, and the sliding rail 321 is slidably disposed on the linear guide groove 311.

[0042] like Figure 7 As shown, the left wingspan 322 and the right wingspan 323 are respectively provided with a plurality of corresponding left wedge blocks 325 and a plurality of right wedge blocks 326 along their respective extension lines. The lifting handle 250 contacts or separates from the corresponding left wedge block 325 and right wedge block 326. In this embodiment, the lifting handle 250 is a cylindrical structure that is large at both ends and narrow in the middle, and the middle part of the lifting handle 250 forms a clamping groove 251 (e.g., Figure 8 (As shown).

[0043] like Figure 9 As shown, it can be understood that when an external force is applied to move the sliding rod 320 to one side, the left wedge block 325 and the right wedge block 326 contact the corresponding lifting handle 250 and pull up; when the external force is removed, the elastic restoring force of the elastic element 330 causes the sliding rod 320 to move in the opposite direction, the left wedge block 325 and the right wedge block 326 separate from the corresponding lifting handle 250, and the lifting handle 250 returns to its original position.

[0044] The working principle of the lithium battery energy storage battery pack 10, which is convenient for daily maintenance and management, will be explained below:

[0045] Under normal operating conditions of the battery pack, the gas inside the cell 100 exchanges with the external gas through the explosion-proof and waterproof vent valve 200, which is called ventilation. Under these conditions, the piston rod 220 will not move, but the gas flows through the waterproof and ventilated membrane set in the explosion-proof and waterproof vent valve 200. The waterproof and ventilated membrane also serves to prevent water and dust.

[0046] When thermal runaway occurs in the battery pack, high-temperature and high-pressure gas is formed inside the cell 100. The high-temperature and high-pressure gas will push the piston rod 220 to move, thereby causing the piston rod 220 to separate from the sealing end 211. A large exhaust space is formed between the piston rod 220 and the sealing end 211, through which the high-temperature and high-pressure gas can be quickly discharged to the outside.

[0047] like Figure 3As shown, it should be noted that in this invention, multiple rows of battery cell assemblies 30 are arranged inside the housing 20, and each battery cell assembly 30 is provided with a corresponding pressure relief and venting device 300. The pressure relief and venting device 300 has a pressure relief and venting channel 301 that penetrates the housing. The pressure relief and venting channels 301 in each battery cell assembly 30 are independent of each other. The high-temperature and high-pressure gas generated by the battery cell 100 can be discharged to the outside of the housing 20 through the pressure relief and venting channel 301. When a battery cell in a certain group of battery cell assemblies 30 experiences thermal runaway, the high-temperature and high-pressure gas generated by the thermal runaway will not affect other battery cell assemblies, thereby minimizing losses and ensuring the overall safety of the battery pack. In addition, another important reason for setting up the pressure relief and venting device 300 is to facilitate daily maintenance and management, which will be discussed in detail below.

[0048] As mentioned in the background technology, when the explosion-proof and waterproof vent valve is used in the complex environment inside the battery pack, problems such as aging of the waterproof ring or unsmooth movement of the piston rod may occur. This will lead to the failure of the explosion-proof and waterproof vent valve, thereby affecting the safety of the battery pack. However, the energy storage battery pack usually contains several battery cells stacked on top of each other. Maintaining the explosion-proof and waterproof vent valve on each battery cell is by no means easy, and the workload is huge and full of difficulties.

[0049] Therefore, the battery pack of the present invention has been structurally optimized so that the internal explosion-proof, waterproof and breathable valve can be routinely maintained and managed without removing the battery pack.

[0050] like Figure 9As shown, during routine maintenance, only an external force needs to be applied to the sliding rod 320 through the pressure relief and ventilation channel 301 on the outside of the battery pack. The sliding rod 320 will move to one side under this force. During this movement, the left wedge block 325 and the right wedge block 326 will contact the corresponding lifting handle 250 and pull it up. As the lifting handle 250 is pulled up, it will drive the piston rod 220 to rise, thus separating the piston rod 220 from the sealing end 211. By appropriately pulling the piston rod 220, the excessive adhesive force caused by the aging of the waterproof ring 240 can be effectively avoided. During the lifting process, dust at the contact point between the piston rod 220 and the valve body can be appropriately removed to improve the smoothness of the piston rod 220's movement. When no external force is applied to the sliding rod 320, the elastic restoring force of the elastic element 330 causes the sliding rod 320 to move in the opposite direction. The left wedge block 325 and the right wedge block 326 separate from the corresponding lifting handle 250, the lifting handle 250 resets, and the piston rod 220 resets under the action of the tension spring 230. By repeatedly applying and removing external force to the sliding rod 320, the lifting handle 250 can drive the piston rod 220 to move back and forth. Through continuous actions, the daily maintenance and management of the battery pack can be completed quickly and conveniently.

[0051] If the sliding rod 320 is difficult to move when external force is applied, or if the sliding rod 320 moves intermittently and unsmoothly during the process, it can be considered that one of the explosion-proof and waterproof vent valves 200 in the current battery cell assembly 30 has been damaged. In the event of such a low-probability extreme situation, it is necessary to consider removing the battery pack for special maintenance. Since it is known in advance which group of battery cell assemblies 30 has a problem, the direction is very clear, and the management personnel can handle the group of battery cell assemblies 30 more accurately, making the problem-solving efficiency very high.

[0052] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A lithium battery energy storage battery pack that facilitates routine maintenance management, characterized by, The application relates to a battery pack, which comprises a shell and a plurality of battery cell assemblies accommodated in the shell, the battery cell assemblies are arranged in a plurality of rows and are arranged in sequence and close to each other in a horizontal plane, each battery cell assembly is provided with a plurality of battery cell monomers, each battery cell monomer is provided with an explosion-proof waterproof breather valve, each battery cell assembly is provided with a pressure relief breather device, the pressure relief breather device is provided with a pressure relief breather channel penetrating through the shell, and the explosion-proof waterproof breather valve on each battery cell monomer is located in the pressure relief breather channel. The pressure relief breather device comprises a fixed seat, a sliding rod sliding on the fixed seat and an elastic member for providing elastic recovery force for the sliding rod. The explosion-proof waterproof breather valve comprises a hollow valve body, a piston rod and a tension spring, the hollow valve body is provided with a sealing end, the sealing end is provided with a waterproof ring, the hollow valve body is pressed on the sealing end by the elastic recovery force provided by the tension spring, and the piston rod is provided with a lifting handle outside the hollow valve body. The sliding rod comprises a sliding rail and left and right side wing spreads fixed on the sliding rail, the left and right side wing spreads are arranged in a clamping channel in a spaced manner, and the plurality of explosion-proof waterproof breather valves in each battery cell assembly are located in the clamping channel. The left and right side wing spreads are respectively provided with a plurality of left and right side wedge blocks in a corresponding and spaced manner along the extension direction of the left and right side wing spreads, and the lifting handle is in contact with or separated from the corresponding left and right side wedge blocks.

2. The lithium battery energy storage battery pack for ease of routine maintenance management of claim 1, wherein, An external force is applied to move the sliding rod to one side, the left and right side wedge blocks contact and lift the corresponding lifting handle, the external force is removed, the elastic recovery force of the elastic member moves the sliding rod to the opposite direction, the left and right side wedge blocks are separated from the corresponding lifting handle, and the lifting handle is reset.

3. The lithium battery energy storage battery pack for easy daily maintenance management according to claim 1 or 2, characterized in that, The lifting handle is a column structure with large ends and a narrow middle part, and the middle part of the lifting handle is in an arc transition to form a clamping groove.

4. The lithium battery energy storage battery pack that facilitates daily maintenance management according to claim 1, wherein, A linear guide groove is formed in the fixed seat, and the sliding rail is slidingly arranged in the linear guide groove.

5. The lithium battery energy storage battery pack that facilitates daily maintenance management according to claim 1, characterized in that, The elastic member is a cylindrical spring structure.

6. The lithium battery energy storage battery pack that facilitates daily maintenance management according to claim 1, wherein, A pressure relief breather opening corresponding to the pressure relief breather channel is formed in the side wall of the shell.

7. The lithium battery energy storage battery pack that facilitates daily maintenance management according to claim 1, wherein, A plurality of battery cell layers are arranged in the shell, the battery cell layers are arranged in a plurality of rows and are arranged in sequence and close to each other in a vertical direction, and each battery cell layer comprises a plurality of battery cell assemblies arranged in a plurality of rows and in sequence and close to each other.

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