A battery pack and disassembly method for easy disassembly of battery cells

Abstract

The present invention proposes a battery pack and a disassembly method that are convenient for disassembling and assembling battery cells, and relates to the field of battery technology. The battery pack comprises: a box body having a plurality of independently arranged installation cavities in the box body; a plurality of battery cells, which are arranged in the installation cavities in a one-to-one correspondence, and the outer contour of the battery cell matches the inner contour of the installation cavity; an adsorption component, comprising a suction pipe and a vacuum pump, wherein a plurality of suction pipes are provided, one end of each suction pipe is connected to the vacuum pump, and the other end of each suction pipe is used to adsorb the bottom surface of the battery cell in the corresponding installation cavity, and each of the suction pipes is provided with an electromagnetic butterfly valve. Through vacuum adsorption technology, the battery cell can be quickly disassembled without the need for complex tools, which greatly improves the convenience and efficiency of operation and shortens maintenance time. The physical impact and pressure on the battery cell during the disassembly process are minimized, which significantly reduces the risk of damage to the appearance and function, and helps to maintain the integrity of the battery cell.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery pack and a disassembly and assembly method for battery cells that are easy to disassemble and assemble. Background Art

[0002] At present, most new energy battery manufacturers usually adopt the form of module battery packs or module-free battery packs (such as CTP, CTB) when designing and producing battery packs. The structure of the battery pack is mainly composed of a box and battery cells. When the battery cells or modules are placed in the battery pack, in order to consider factors such as heat dissipation, fixation and structural strength, thermal conductive structural adhesive is usually applied to the bottom of the box, and then the battery cells or modules are placed on the adhesive so that their bottoms are in full contact with the adhesive surface. However, this connection method has the following problems throughout the life cycle of the battery pack:

[0003] During the R&D testing phase, if a problem occurs with the battery pack during testing and the battery cells need to be replaced, or if the battery pack needs to be disassembled for analysis after testing, the solidified colloid makes disassembly difficult and can easily cause damage to the battery cell's appearance, thus affecting the test progress and the accuracy of data analysis. During the mass production phase, if problems with the box or abnormalities in the bottom insulation are found, the battery cells will also face difficulties in disassembling due to solidified colloid, which may cause damage to the battery cells and increase production costs. During the after-sales maintenance phase, when the end customer's battery pack fails and needs to be disassembled, the solidified colloid will again complicate disassembly, which may affect subsequent repairs and replacements, increasing after-sales costs.

[0004] In the relevant prior art, for example, the announcement number CN220873701U discloses a cell module disassembly structure and a battery pack, which heats the colloid to reduce or destroy the adhesion, thereby separating the cell from the box. Another example is the patent with the publication number CN114227191A discloses a battery pack disassembly method, which removes the structural adhesive by vibrating the cell. Although these two methods can achieve the disassembly of the cell from the box to a certain extent, there are certain defects. Specifically, heating will cause local overheating of the cell or the box, thereby affecting the battery performance or safety. The vibration method is only for colloids with weak adhesion and cannot remove colloids with strong adhesion. When the vibration intensity is too large, it will cause mechanical damage or structural damage to the cell, affecting the performance of the cell. At the same time, the above two methods require a certain amount of time in the cell disassembly process, and the disassembly efficiency is low. Summary of the Invention

[0005] In view of this, the present invention proposes a battery pack and a disassembly method for easy disassembly of battery cells to solve the problems of difficulty in disassembling battery cells, low disassembly efficiency, and damage to battery cells during the entire life cycle of the battery pack.

[0006] The technical solution of the present invention is achieved as follows:

[0007] In one aspect, the present invention provides a battery pack that facilitates the disassembly and assembly of battery cells, the battery pack comprising:

[0008] A box body having a plurality of independently arranged installation cavities;

[0009] There are multiple battery cells, which are arranged in the installation cavity in a one-to-one correspondence, and the outer contour of the battery cell matches the inner contour of the installation cavity;

[0010] The adsorption component includes a suction pipe and a vacuum pump. There are multiple suction pipes, one end of each suction pipe is connected to the vacuum pump, and the other end of each suction pipe is used to adsorb the bottom surface of the battery cell in the corresponding installation cavity. Each suction pipe is provided with an electromagnetic butterfly valve.

[0011] On the basis of the above technical solution, preferably, a connecting piece is further included, wherein the connecting piece includes a connecting sleeve and a connecting column fixedly arranged at the bottom of the connecting sleeve, the top of the connecting sleeve has a connecting cavity, the battery cell is arranged in the connecting cavity, the outer contour of the battery cell matches the inner contour of the connecting cavity, a connecting groove is provided on the bottom surface of the installation cavity, the connecting sleeve is arranged in the installation cavity, the connecting column and the connecting groove are detachably fixedly connected, a vent hole connected to the connecting cavity is provided at the central axis of the connecting column, and the end of the suction pipe away from the vacuum pump is connected to the connecting groove.

[0012] Furthermore, preferably, a diaphragm pressure sensor is further included, and the diaphragm pressure sensor is arranged between the bottom surface of the battery cell and the bottom surface of the connecting cavity.

[0013] On the basis of the above technical solution, preferably, it further comprises a control module, wherein the control module is electrically connected to the vacuum pump, the electromagnetic butterfly valve and the diaphragm pressure sensor.

[0014] On the basis of the above technical solution, preferably, a displacement sensor is provided in the connecting groove for detecting the depth of the connecting column inserted into the connecting groove, and the displacement sensor is electrically connected to the control module.

[0015] On the basis of the above technical solution, preferably, the adsorption component further includes a vacuum sensor electrically connected to the control module, and the vacuum sensor is arranged on the suction pipe between the installation cavity and the electromagnetic butterfly valve.

[0016] On the basis of the above technical solution, preferably, an elastic layer of insulating material is provided on the inner peripheral wall of the connecting cavity.

[0017] On the basis of the above technical solution, preferably, a first docking terminal is provided on the bottom surface of the installation cavity, the first docking terminal is electrically connected to the control module, and a second docking terminal connected to the first docking terminal is fixedly provided on the bottom surface of the connecting sleeve, and the second docking terminal is electrically connected to the diaphragm pressure sensor.

[0018] In a second aspect, the present invention provides a method for disassembling and assembling a battery pack, which is used to disassemble and assemble the battery cells of the battery pack that is easy to disassemble and assemble the battery cells as described in the first aspect, comprising the following steps:

[0019] S1. Input the required adhesion force for cell installation into the control module through the host computer, install the cell into the connection cavity of the connecting sleeve, and insert the connecting sleeve into the corresponding installation cavity of the box body so that the connecting column and the connecting groove are detachably fixed.

[0020] S2. When the connector is installed in the installation cavity, the control module controls the electromagnetic butterfly valve and the vacuum pump to open, vacuuming the installation cavity to exhaust the air inside the connection cavity, so that the battery cell is tightly adsorbed on the bottom surface of the connection cavity;

[0021] S3. When the detection data of the diaphragm pressure sensor at the bottom of the battery cell reaches the set value, it is determined that the battery cell has been installed, and the control module controls the electromagnetic butterfly valve and the vacuum pump to close;

[0022] S4. When the battery cell needs to be disassembled, the upper computer communicates with the control module to set the serial number of the battery cell to be disassembled. The control module sends a signal to the corresponding electromagnetic butterfly valve, which opens to eliminate the vacuum suction on the bottom of the battery cell, and the battery cell can be removed from the connector.

[0023] On the basis of the above technical solution, preferably, in step S4, after the vacuum suction is eliminated, the connector with the battery cell can be directly taken out of the installation cavity, and then the battery cell can be taken out of the connection cavity.

[0024] The present invention has the following beneficial effects compared to the prior art:

[0025] (1) Through vacuum adsorption technology, battery cells can be quickly disassembled without the need for complex tools, greatly improving the convenience and efficiency of operation and shortening maintenance time. The physical impact and pressure on the battery cells during disassembly are minimized, significantly reducing the risk of damage to appearance and function, and helping to maintain the integrity of the battery cells. Efficient disassembly and low damage rate reduce the maintenance and repair costs of the battery pack and improve production efficiency.

[0026] (2) Through the setting of the connector, the connector acts as an intermediary to separate the battery cell from the fixed structure of the box. By using the connector, the design of the battery pack can adapt to battery cells of different sizes. The outer contour of the connecting sleeve matches the inner contour of the installation cavity, but the actual shape of the battery cell no longer directly depends on the size limit of the installation cavity, but matches the connection cavity on the connecting sleeve. When it is necessary to adapt to different battery cell sizes, only the connector needs to be replaced. Since the cost of the connector mold is low, the cost of the box mold can be greatly reduced, which significantly reduces the production cost and time, so that the battery pack can adjust the size and type of the battery cell according to demand.

[0027] (3) By setting a connecting column and opening a vent hole connected to the connecting cavity on the connecting column, on the one hand, it is convenient for the battery cell to be quickly and detachably fixedly connected to the installation cavity with the help of the connecting piece. At the same time, after the connecting column is connected to the connecting groove, the external suction component can be quickly connected to the connecting cavity through the vent hole on the connecting column, thereby establishing a vacuum suction mechanism to ensure that vacuum adsorption can be smoothly and reliably implemented on the bottom surface of the battery cell.

[0028] (4) By setting the connector, when the vacuum in the connecting cavity is eliminated, the side walls of the battery cell and the side walls of the connecting cavity are in a tightly fitted state. When the battery cell needs to be disassembled, the battery cell is not easy to remove from the connector. Since the connector is inserted into the installation cavity as a whole, the connector can be pulled out of the installation cavity and then the battery cell can be removed from the connector, which is convenient for operation.

[0029] (5) By setting up a diaphragm pressure sensor and a control module, it is possible to determine whether the battery cell fully meets the Z-direction adhesion force requirement, and to achieve automatic separation between the battery cell and the box body, with a high degree of intelligence. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 A schematic diagram of a partial three-dimensional structure of the battery pack disclosed in the present invention;

[0032] Figure 2 It is a schematic diagram of the three-dimensional structure of the box disclosed in the present invention;

[0033] Figure 3 This is a schematic diagram of the assembly structure of the connector and battery cell disclosed in the present invention;

[0034] Figure 4This is a schematic diagram of the internal structure of the connector disclosed in the present invention;

[0035] Figure 5 This is a schematic diagram of the planar structure of the battery pack disclosed in the present invention;

[0036] Figure 6 for Figure 5 Plane section view at AA in the middle;

[0037] Figure 7 for Figure 6 A partial enlarged view of point B in the middle;

[0038] Figure 8 This is a schematic diagram of the battery cell disassembly and assembly process disclosed in the present invention;

[0039] Reference numerals:

[0040] 1. Box body; 11. Installation cavity; 2. Battery cell; 3. Adsorption assembly; 31. Suction pipe; 32. Vacuum pump; 33. Solenoid butterfly valve; 34. Vacuum sensor; 4. Connector; 41. Connecting sleeve; 42. Connecting column; 411. Connecting cavity; 110. Connecting groove; 421. Vent; 5. Diaphragm pressure sensor; 6. Displacement sensor; P, elastic layer; L1, first docking terminal; L2, second docking terminal. DETAILED DESCRIPTION

[0041] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] like Figure 1 As shown, combined Figure 2-7 The embodiment of the present invention discloses a battery pack that is easy to disassemble and assemble a battery cell 2, including a box body 1, a battery cell 2 and an adsorption component 3.

[0043] The box body 1 has multiple independently arranged installation cavities 11 inside. Due to the arrangement, each battery cell 2 can be installed in an independent space, reducing mutual interference, and also providing a certain disassembly space for convenience during disassembly, while ensuring the heat dissipation and electrical safety of the battery cell 2.

[0044] There are multiple battery cells 2, which are arranged one by one in the installation cavity 11. In this embodiment, the battery cell 2 is preferably a square battery cell 2, but it can also be a cylindrical battery cell 2. The outer contour of the battery cell 2 matches the inner contour of the installation cavity 11, ensuring that the battery cell 2 is firmly fixed during the installation process, avoiding possible loosening or displacement during use, and improving the overall stability of the battery pack.

[0045] Since the battery cell 2 is inserted into the installation cavity 11, the installation cavity 11 only provides constraint and fixation for the battery cell 2 in the horizontal direction, and cannot provide constraint in the height direction. If structural glue is set between the bottom surface of the battery cell 2 and the bottom surface of the installation cavity 11, although the battery cell 2 can be effectively fixed in the height direction, it is not convenient to remove the structural glue from between the battery cell 2 and the box body 1 when the battery cell 2 is disassembled later, resulting in difficulty in disassembling the battery cell 2, and violent disassembly may cause damage to the battery cell 2.

[0046] To this end, the present embodiment provides an adsorption component 3, which includes a suction pipe 31 and a vacuum pump 32. There are multiple suction pipes 31, one end of each suction pipe 31 is connected to the vacuum pump 32, and the other end of each suction pipe 31 is used to adsorb the bottom surface of the battery cell 2 in the corresponding installation cavity 11. The configuration of the suction pipe 31 and the vacuum pump 32 forms an efficient disassembly mechanism. Each suction pipe 31 corresponds to the installation cavity 11. Vacuum evacuation can quickly and evenly adsorb the bottom surface of the battery cell 2, so that the battery cell 2 is firmly fixed inside the installation cavity 11.

[0047] An electromagnetic butterfly valve 33 is provided on each suction pipe 31. When vacuum extraction is performed, the electromagnetic butterfly valve 33 is in an open state, allowing air to flow out of the installation cavity 11. As the vacuum pump 32 works, the pressure in the cavity gradually decreases, forming the required vacuum degree. Once the set vacuum degree is reached, the electromagnetic butterfly valve 33 is closed, thereby maintaining the vacuum adsorption force between the safety cavity and the bottom surface of the battery cell 2. This adsorption force helps to firmly fix the battery cell 2 and ensure its stability in the battery pack. When the battery cell 2 needs to be removed, the electromagnetic butterfly valve 33 opens again, allowing air to enter the installation cavity 11, thereby quickly eliminating the vacuum suction. In this way, the adsorption force between the battery cell 2 and the installation cavity 11 is released, so that the battery cell 2 can be easily removed.

[0048] Using vacuum adsorption technology, the battery cell 2 can be quickly disassembled without complex tools, significantly improving operational convenience and efficiency and shortening maintenance time. The physical impact and pressure on the battery cell 2 during disassembly are minimized, significantly reducing the risk of cosmetic and functional damage and helping to maintain the integrity of the battery cell 2. Efficient disassembly and low damage rates reduce battery pack maintenance and repair costs, improving production efficiency.

[0049] In the above embodiment, in order to meet the requirements of vacuum adsorption, the inner contour dimensions of the installation cavity 11 need to match the outer dimensions of the battery cell 2. This results in the box 1 being able to only assemble battery cells 2 of one size, and the power of the corresponding battery pack can only meet one model. If different power requirements need to be met, the size of the battery cell 2 needs to be changed accordingly. Since the size of the installation cavity 11 inside the box 1 is fixed, it cannot accommodate the installation of battery cells 2 of different sizes. At this time, the box 1 needs to be re-molded, resulting in high production costs.

[0050] To this end, this embodiment further improves the structure of the battery pack. For details, refer to the attached Figure 2-4 As shown, the battery pack of this embodiment also includes a connector 4, which includes a connecting sleeve 41 and a connecting column 42 fixedly arranged at the bottom of the connecting sleeve 41. The top of the connecting sleeve 41 has a connecting cavity 411, and the battery cell 2 is arranged in the connecting cavity 411. The outer contour of the battery cell 2 matches the inner contour of the connecting cavity 411 to ensure that the position of the battery cell 2 is stable after installation in the connecting cavity 411. A connecting groove 110 is provided on the bottom surface of the installation cavity 11, and the connecting sleeve 41 is arranged in the installation cavity 11. The connecting column 42 is detachably fixedly connected to the connecting groove 110, thereby realizing that after the battery cell 2 is installed on the connecting sleeve 41, when the connecting sleeve 41 is inserted into the installation cavity 11, the battery cell 2 is connected to the connecting groove 110 on the bottom surface of the installation cavity 11 through the connecting column 42, so that the battery cell 2 is detachably connected to the installation cavity 11 with the aid of the connector 4.

[0051] By setting the connector 4, the connector 4 acts as an intermediary to separate the battery cell 2 from the fixed structure of the box body 1. By using the connector 4, the design of the battery pack can adapt to battery cells 2 of different sizes. The outer contour of the connecting sleeve 41 matches the inner contour of the installation cavity 11, but the actual shape of the battery cell 2 is no longer directly dependent on the size limit of the installation cavity 11, but matches the connection cavity 411 on the connecting sleeve 41. When it is necessary to adapt to different battery cell 2 sizes, only the connector 4 needs to be replaced. Since the mold cost of the connector 4 is relatively low, the mold cost of the box body 1 can be greatly reduced, significantly reducing production costs and time, so that the battery pack can adjust the size and type of the battery cell 2 according to needs.

[0052] In this embodiment, a clearance fit is adopted between the connecting sleeve 41 and the installation cavity 11, so that the connecting sleeve 41 can be easily inserted into the installation cavity 11. Since the connecting member 4 is quickly and detachably connected through the connecting column 42 and the connecting groove 110, and the battery cell 2 is inserted into the connecting cavity 411, in order to achieve the battery cell 2 to be firmly fixed in the connecting cavity 411, vacuum adsorption can be used to make the battery cell 2 tightly adhere to the bottom surface of the connecting cavity 411.

[0053] This embodiment employs a solution in which a vent hole 421 is provided at the central axis of the connecting post 42, communicating with the connecting cavity 411. The end of the suction pipe 31, remote from the vacuum pump 32, communicates with the connecting groove 110. With this arrangement, the vacuum pump 32 applies suction to the suction pipe 31, which establishes an air passage through the connecting groove 110 and the vent hole 421 on the connecting post 42, thereby exhausting air from the connecting cavity 411 and achieving a secure adhesion between the bottom surface of the battery cell 2 and the bottom surface of the connecting cavity 411.

[0054] By setting a connecting column 42 and opening a vent hole 421 on the connecting column 42 that is connected to the connecting cavity 411, on the one hand, it is convenient for the battery cell 2 to be quickly and detachably fixedly connected to the installation cavity 11 with the help of the connecting piece 4. At the same time, after the connecting column 42 is connected to the connecting groove 110, the external suction component can be quickly connected to the connecting cavity 411 through the vent hole 421 on the connecting column 42, thereby establishing a vacuum suction mechanism to ensure that vacuum adsorption can be smoothly and reliably implemented on the bottom surface of the battery cell 2.

[0055] It is also worth noting that since the battery cells 2 are densely arranged in the housing 1 and are inserted into the connecting cavity 411, the outer contour of the battery cells 2 matches the inner contour of the connecting cavity 411. When the vacuum in the connecting cavity 411 is eliminated, the side walls of the battery cells 2 and the side walls of the connecting cavity 411 are in a tight fit. When the battery cells 2 need to be removed, it is not easy to remove the battery cells 2 from the connector 4. Since the connector 4 is entirely inserted into the mounting cavity 11, the connector 4 can be pulled out of the mounting cavity 11 and then the battery cells 2 can be removed from the connector 4, making the operation easier.

[0056] In the above embodiment, the connection between the connecting post 42 and the connecting groove 110 is connected by a snap-fit ​​connection. As an embodiment, the connecting post 42 is a bamboo-shaped structure, and the connecting groove 110 is an inverted T-shaped structure. Of course, other snap-fit ​​structures can be selected for the connecting post 42 and the connecting groove 110. In this embodiment, the connecting member 4 can be made of metal or plastic.

[0057] In the prior art, the bottom surface of the battery cell 2 is fixedly connected to the box body 1 by gluing, and it is impossible to accurately determine whether the battery cell 2 fully meets the close contact force requirement in the height direction, which may cause the battery cell 2 to be improperly installed in the box body 1.

[0058] To this end, the battery pack of this embodiment is further provided with a diaphragm pressure sensor 5, which is disposed between the bottom surface of the battery cell 2 and the inner bottom surface of the connecting cavity 411. When the connecting cavity 411 is evacuated and a certain vacuum degree is achieved, the diaphragm pressure sensor 5 can detect the adhesion force between the battery cell 2 and the inner bottom surface of the connecting cavity 411.

[0059] The battery pack of this embodiment further includes a control module, which is electrically connected to the vacuum pump 32 , the electromagnetic butterfly valve 33 and the diaphragm pressure sensor 5 .

[0060] Specifically, the adhesion force required for the installation of the battery cell 2 is input into the control module through the upper computer. When the connector 4 is placed in place in the installation cavity 11, the control module sends a control signal to control the electromagnetic butterfly valve 33 and the vacuum pump 32 to open, and exhaust the air in the connecting cavity 411 by suction, so that the battery cell 2 is tightly attached to the bottom surface of the connecting cavity 411 under vacuum adsorption. When the diaphragm pressure sensor 5 detects that the adhesion force parameter meets the set requirement, the electromagnetic butterfly valve 33 is closed and the vacuum pump 32 is closed to ensure that the connecting cavity 411 is in a vacuum adsorption state.

[0061] To ensure that the battery cell 2 is properly installed within the installation cavity 11, this embodiment further includes a displacement sensor 6 within the connection slot 110 for detecting the depth of the connection post 42 inserted into the connection slot 110. The displacement sensor 6 is electrically connected to the control module. During the installation of the battery cell 2, as the connector 4 containing the battery cell 2 is inserted into the connection slot 110 via the connection post 42, the displacement sensor 6 can scan the insertion length of the connection post 42, thereby determining whether the connector 4 is properly installed and providing feedback through the control module. Vacuuming can only be performed after the connector 4 is properly installed.

[0062] As some optional embodiments, the adsorption assembly 3 also includes a vacuum sensor 34 electrically connected to the control module. The vacuum sensor 34 is disposed on the suction pipe 31 between the mounting cavity 11 and the electromagnetic butterfly valve 33. The vacuum sensor 34 can detect the vacuum level within the connection cavity 411. The vacuum sensor 34 and the diaphragm pressure sensor 5 work together to monitor the height-dependent adhesion of the battery cell 2. The vacuum pump 32 stops operating only when the data collected by the vacuum level and the diaphragm pressure sensor 5 meet the set requirements, thereby ensuring that the bottom surface of the battery cell 2 can be firmly adsorbed and that the adhesion meets the set requirements.

[0063] As some preferred embodiments, in order to ensure the sealing of the connecting cavity 411 after vacuuming, this embodiment also provides an elastic layer P of insulating material on the inner wall of the connecting cavity 411. Therefore, after the battery cell 2 is inserted into the connecting cavity 411, the outer wall of the battery cell 2 can be squeezed and sealed by the elastic layer P and the inner wall of the connecting cavity 411, thereby ensuring the vacuum degree in the connecting cavity 411, improving the installation strength of the battery cell 2 in the connecting cavity 411, and ensuring that the adhesion meets the requirements.

[0064] Because the diaphragm pressure sensor is mounted on the bottom surface of the connecting sleeve 41 and the connector 4 is separate from the housing 1, in order to establish an electrical connection between the diaphragm pressure sensor and the control module, this embodiment provides a first docking terminal L1 on the bottom surface of the mounting cavity 11. The first docking terminal L1 is electrically connected to the control module, and a second docking terminal L2 is fixedly mounted on the bottom surface of the connecting sleeve 41, connected to the first docking terminal L1. The second docking terminal L2 is electrically connected to the diaphragm pressure sensor. With this arrangement, when the connector 4 is fully mounted within the mounting cavity 11, the first docking terminal L1 and the second docking terminal L2 are electrically connected, thereby establishing a connection between the diaphragm pressure sensor and the control module.

[0065] When the battery cell 2 needs to be disassembled and it is inconvenient to remove the battery cell 2 from the connector 4, the connector 4 connected to the battery cell 2 can be pulled out of the installation cavity 11 as a whole. At this time, the first docking terminal L1 and the second docking terminal L2 are disconnected, which will not cause damage to the electrical part and is convenient for subsequent reinstallation and maintenance.

[0066] Refer to the attached Figure 8 As shown, the present invention provides a method for disassembling and assembling a battery pack, which is used to disassemble and assemble the battery cells 2 of the battery pack disclosed in the above embodiment, including the following steps;

[0067] S1. Input the required adhesion force for installing the battery cell 2 into the control module through the host computer, install the battery cell 2 into the connecting cavity 411 of the connecting sleeve 41, and insert the connecting sleeve 41 into the corresponding installation cavity 11 of the box body 1, so that the connecting column 42 and the connecting groove 110 are detachably fixedly connected;

[0068] S2. When the connector 4 is installed in the installation cavity 11, the control module controls the electromagnetic butterfly valve 33 and the vacuum pump 32 to open, vacuuming the installation cavity 11 and exhausting the air inside the connecting cavity 411, so that the battery cell 2 is tightly adsorbed on the bottom surface of the connecting cavity 411;

[0069] In this step, the connection member 4 is properly installed in the installation cavity 11 by monitoring the displacement sensor 6 provided in the connection groove 110. Only when the connection member 4 is properly installed will the control module send a control signal to start the electromagnetic butterfly valve 33 and the vacuum pump 32. If the connection member 4 is not properly installed, an alarm will be issued through the prompt module.

[0070] S3. When the detection data of the diaphragm pressure sensor 5 at the bottom of the battery cell 2 reaches the set value, it is determined that the battery cell 2 has been installed, and the control module controls the electromagnetic butterfly valve 33 and the vacuum pump 32 to be closed;

[0071] S4. When the battery cell 2 needs to be disassembled, the upper computer communicates with the control module, sets the serial number of the battery cell 2 to be disassembled, and the control module sends a signal to the corresponding electromagnetic butterfly valve 33. The electromagnetic butterfly valve 33 opens, eliminating the vacuum suction on the bottom of the battery cell 2, and the battery cell 2 can be removed from the connector 4.

[0072] When the vacuum suction is removed, the side walls of the battery cell 2 and the side walls of the connecting cavity 411 are in a tightly fitted state. When the battery cell 2 needs to be removed, it is not easy to remove the battery cell 2 from the connecting member 4. Therefore, in step S4, the connecting member 4 with the battery cell 2 can be directly removed from the installation cavity 11, and then the battery cell 2 can be removed from the connecting cavity 411.

[0073] The battery pack disclosed in the present invention can remove the battery cells that need to be replaced or repaired by vacuum adsorption between the contact battery cells and the box body during the research and development testing stage, the mass production stage and the after-sales maintenance stage. The integrity of the battery cells can be maintained during disassembly, and new battery cells can be quickly replaced, thereby improving testing efficiency, production progress and after-sales efficiency.

[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A battery pack that is easy to disassemble and assemble the battery cells, characterized in that: The battery pack includes: A box body (1), wherein the box body (1) has a plurality of independently arranged installation cavities (11); A plurality of battery cells (2) are provided and are arranged in a one-to-one correspondence in the installation cavity (11), and the outer contour of the battery cells (2) matches the inner contour of the installation cavity (11); An adsorption assembly (3) includes a suction pipe (31) and a vacuum pump (32), wherein a plurality of suction pipes (31) are provided, one end of each suction pipe (31) is connected to the vacuum pump (32), and the other end of each suction pipe (31) is used to adsorb the bottom surface of the battery cell (2) in the corresponding installation cavity (11), and each suction pipe (31) is provided with an electromagnetic butterfly valve (33); The invention also includes a connecting member (4), wherein the connecting member (4) includes a connecting sleeve (41) and a connecting column (42) fixedly arranged at the bottom of the connecting sleeve (41); the top of the connecting sleeve (41) has a connecting cavity (411); the battery core (2) is arranged in the connecting cavity (411); the outer contour of the battery core (2) matches the inner contour of the connecting cavity (411); a connecting groove (110) is provided on the inner bottom surface of the installation cavity (11); the connecting sleeve (41) is arranged in the installation cavity (11); the connecting column (42) is detachably fixedly connected to the connecting groove (110); a vent hole (421) communicating with the connecting cavity (411) is provided at the central axis of the connecting column (42); and one end of the suction pipe (31) away from the vacuum pump (32) is connected to the connecting groove (110).

2. The battery pack for easy disassembly and assembly of battery cells according to claim 1, characterized in that: It also includes a diaphragm pressure sensor (5), which is arranged between the bottom surface of the battery core (2) and the inner bottom surface of the connecting cavity (411).

3. The battery pack for easy disassembly and assembly of battery cells according to claim 2, characterized in that: It also includes a control module, which is electrically connected to the vacuum pump (32), the electromagnetic butterfly valve (33) and the diaphragm pressure sensor (5).

4. The battery pack for easy disassembly and assembly of battery cells as claimed in claim 3, characterized in that: A displacement sensor (6) is provided in the connection slot (110) for detecting the depth of the connection column (42) inserted into the connection slot (110). The displacement sensor (6) is electrically connected to the control module.

5. The battery pack for easy disassembly and assembly of battery cells as claimed in claim 3, characterized in that: The adsorption assembly (3) further comprises a vacuum sensor (34) electrically connected to the control module, wherein the vacuum sensor (34) is arranged on the suction pipe (31) between the installation cavity (11) and the electromagnetic butterfly valve (33).

6. The battery pack for easy disassembly and assembly of battery cells according to claim 1, characterized in that: The inner peripheral wall of the connecting cavity (411) is provided with an elastic layer (P) made of insulating material.

7. The battery pack for easy disassembly and assembly of battery cells as claimed in claim 3, characterized in that: A first docking terminal (L1) is provided on the bottom surface of the installation cavity (11), and the first docking terminal (L1) is electrically connected to the control module. A second docking terminal (L2) connected to the first docking terminal (L1) is fixedly provided on the bottom surface of the connection sleeve (41), and the second docking terminal (L2) is electrically connected to the diaphragm pressure sensor (5).

8. A method for disassembling and assembling a battery pack, for realizing disassembling and assembling the battery cells of the battery pack according to any one of claims 3 to 7, characterized in that: The steps include: S1. Inputting the required adhesion force for installing the battery cell (2) into the control module through the upper computer, installing the battery cell (2) into the connecting cavity (411) of the connecting sleeve (41), and inserting the connecting sleeve (41) into the corresponding mounting cavity (11) of the box body (1), so that the connecting column (42) and the connecting groove (110) are detachably fixedly connected; S2. When the connector (4) is installed in the installation cavity (11), the control module controls the electromagnetic butterfly valve (33) and the vacuum pump (32) to open, vacuuming the installation cavity (11) to exhaust the air inside the connection cavity (411), so that the battery cell (2) is tightly adsorbed on the bottom surface of the connection cavity (411); S3, when the detection data of the diaphragm pressure sensor (5) at the bottom of the battery cell (2) reaches the set value, it is determined that the battery cell (2) has been installed, and the control module controls the electromagnetic butterfly valve (33) and the vacuum pump (32) to close; S4. When the battery cell (2) needs to be disassembled, the upper computer communicates with the control module, sets the serial number of the battery cell (2) to be disassembled, and the control module sends a signal to the corresponding electromagnetic butterfly valve (33). The electromagnetic butterfly valve (33) opens, eliminating the vacuum suction on the bottom of the battery cell (2), and the battery cell (2) can be taken out from the connector (4).

9. The battery pack disassembly and assembly method according to claim 8, wherein: In step S4, after the vacuum suction is eliminated, the connector (4) with the battery core (2) can be directly taken out of the installation cavity (11), and then the battery core (2) can be taken out of the connection cavity (411).

Images