Battery pack convenient for disassembling and assembling battery cells and disassembling and assembling method

Abstract

The invention provides a battery pack convenient for dismounting and mounting battery cells and a dismounting and mounting method, and relates to the technical field of batteries, the battery pack comprises: a box body, in which a plurality of independently arranged mounting cavities are arranged; the multiple battery cells are arranged in the mounting cavities in a one-to-one correspondence mode, and the outer contours of the battery cells are matched with the inner contours of the mounting cavities; the adsorption assembly comprises a plurality of suction pipelines and a vacuum pump, one end of each suction pipeline is connected with the vacuum pump, the other end of each suction pipeline is used for adsorbing the bottom surface of the battery cell in the corresponding mounting cavity, and each suction pipeline is provided with an electromagnetic butterfly valve. And through the vacuum adsorption technology, the battery cell can be quickly disassembled without a complicated tool, so that the operation convenience and efficiency are greatly improved, and the maintenance time is shortened. The physical impact and pressure on the battery cell in the dismounting process are reduced to the minimum, so that the risk of appearance and function damage is remarkably reduced, and the integrity of the battery cell is favorably kept.

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 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 glue is usually applied to the bottom of the box, and then the battery cells or modules are placed on the glue so that the bottom is in full contact with the glue 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 during testing of the battery pack and the battery cell needs 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 appearance of the battery cell, thus affecting the test progress and the accuracy of data analysis. During the mass production phase, if problems with the box or abnormal insulation at the bottom are found, the battery cell will also face difficulties in solidifying the colloid when disassembling it, which may cause damage to the battery cell 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 related prior art, for example, the announcement number CN220873701U discloses a battery module disassembly structure and a battery pack, which heats the colloid to reduce or destroy the adhesion, thereby separating the battery cell from the box. Another example is the patent with the publication number CN114227191A discloses a battery pack disassembly method, which removes the structural glue by vibrating the battery cell. Although these two methods can realize the disassembly of the battery cell from the box to a certain extent, there are certain defects. Specifically, heating will cause local overheating of the battery cell or the box, thereby affecting the battery performance or safety. The vibration method is only for colloids with weaker adhesion, and cannot remove colloids with stronger adhesion. When the vibration intensity is too large, it will cause mechanical damage or structural damage to the battery cell, affecting the performance of the battery cell. At the same time, the above two methods require a certain amount of time in the process of disassembling the battery cell, 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 and assembly method for easy disassembly of battery cells, so as to solve the problems of difficulty in disassembly of battery cells, low disassembly efficiency and damage to battery cells during the whole life cycle of the battery pack.

[0006] The technical solution of the present invention is achieved in this way:

[0007] In one aspect, the present invention provides a battery pack that is easy to disassemble and assemble a battery cell, the battery pack comprising:

[0008] A box body, wherein the box body has a plurality of independently arranged installation cavities;

[0009] A plurality of battery cells are provided, 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, it also includes a connecting piece, which 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 also 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 also 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, and comprises the following steps;

[0019] S1. Input the required close contact force for installing the battery cell into the control module through the upper computer, install the battery cell into the connection cavity of the connection sleeve, and insert the connection sleeve into the corresponding installation cavity of the box body, so that the connection column and the connection groove can be detachably fixedly connected;

[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, vacuum the installation cavity, exhaust the air inside the connection cavity, and make the battery cell 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, and the electromagnetic butterfly valve opens to eliminate the vacuum suction on the bottom of the battery cell, so that 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 force is eliminated, the connector with the battery cell can be directly taken out from the installation cavity, and then the battery cell can be taken out from the connection cavity.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] (1) Through vacuum adsorption technology, the battery cell can be quickly disassembled without complex tools, greatly improving the convenience and efficiency of operation and shortening maintenance time. The physical impact and pressure on the battery cell during the disassembly process are minimized, significantly reducing the risk of damage to the appearance and function, and helping to maintain the integrity of the battery cell. 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 batteries 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) Through the setting of the connector, when the vacuum of the connection cavity is eliminated, the side wall of the battery cell and the side wall of the connection cavity are in a tightly fitted state. When the battery cell needs to be removed, it is not easy to remove the battery cell 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 requirement, and the battery cell and the box body can be automatically separated, which has 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

[0031] Figure 1 It is 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 It is a schematic diagram of the assembly structure of the connector and the 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 It 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 It is a schematic diagram of the process of disassembling and assembling the battery cell disclosed in the present invention;

[0039] Reference numerals:

[0040] 1. Box body; 11. Installation cavity; 2. Battery cell; 3. Adsorption component; 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 described embodiments 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 creative work 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 a plurality of independently arranged installation cavities 11 inside. Due to the arrangement, each battery cell 2 can be installed in an independent space, which reduces mutual interference and provides 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 the present 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 looseness or displacement that may occur during use, and improving the overall stability of the battery pack.

[0045] Since the battery cell 2 is inserted in the installation cavity 11, the installation cavity 11 only provides constraints and fixation for the battery cell 2 in the horizontal direction, and cannot provide constraints 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, which makes it difficult to disassemble the battery cell 2, and violent disassembly may cause damage to the battery cell 2.

[0046] To this end, the present embodiment is provided with an adsorption component 3, which includes a suction pipe 31 and a vacuum pump 32. 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. 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 to form 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 to allow 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] Through vacuum adsorption technology, the battery cell 2 can be quickly disassembled without complex tools, greatly improving the convenience and efficiency of operation and shortening maintenance time. The physical impact and pressure on the battery cell 2 during the disassembly process are minimized, significantly reducing the risk of damage to the appearance and function, and helping to maintain the integrity of the battery cell 2. Efficient disassembly and low damage rate reduce the maintenance and repair costs of the battery pack and improve 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 one size of battery cell 2, 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 is impossible to adapt to the installation of battery cells 2 of different sizes, and 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 connecting column 42 is connected to the connecting groove 110 on the bottom surface of the installation cavity 11, so that the battery cell 2 is detachably connected to the installation cavity 11 with the aid of the connector 4.

[0051] Through the setting of 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 different sizes of battery cells 2. 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 no longer directly depends on the size limit of the installation cavity 11, but matches the connecting cavity 411 on the connecting sleeve 41. When it is necessary to adapt to different sizes of battery cells 2, only the connector 4 needs to be replaced. Since the mold cost of the connector 4 is low, the mold cost of the box body 1 can be greatly reduced, and the production cost and time are significantly reduced, so that the battery pack can adjust the size and type of the battery cell 2 according to the 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 that the battery cell 2 is firmly fixed in the connecting cavity 411, vacuum adsorption can be used to make the battery cell 2 tightly attached to the bottom surface of the connecting cavity 411.

[0053] The solution adopted in this embodiment is to open a vent hole 421 connected to the connection cavity 411 at the central axis of the connection column 42, and the end of the suction pipe 31 away from the vacuum pump 32 is connected to the connection groove 110. In this way, the vacuum pump 32 applies suction force to the suction pipe 31, and the suction pipe 31 establishes an air path through the connection groove 110 and the vent hole 421 on the connection column 42, so as to discharge the air in the connection cavity 411, and realize the firm adsorption of the bottom surface of the battery cell 2 to the bottom surface of the connection 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 box body 1 and the battery cells 2 are inserted in the connection cavity 411, the outer contour of the battery cells 2 matches the inner contour of the connection cavity 411. When the vacuum of the connection cavity 411 is eliminated, the side walls of the battery cells 2 and the side walls of the connection cavity 411 are in a tightly fitted state. When the battery cells 2 need to be removed, the battery cells 2 are not easy to be removed from the connector 4. Since the connector 4 is inserted in the installation cavity 11 as a whole, the connector 4 can be pulled out of the installation cavity 11, and then the battery cells 2 can be removed from the connector 4, which is convenient for operation.

[0056] In the above embodiment, the connection column 42 and the connection groove 110 are connected in a snap-fitting manner. As an implementation method, the connection column 42 is a bamboo-joint structure, and the connection groove 110 is set as an inverted T-shaped structure. Of course, the connection column 42 and the connection groove 110 can also select other forms of snap-fitting structures. In this embodiment, the connector 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 adhesion 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 arranged 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, when a certain vacuum degree is met, the adhesion force between the battery cell 2 and the inner bottom surface of the connecting cavity 411 can be obtained through the diaphragm pressure sensor 5.

[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 installing 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 reaches 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] In order to ensure that the battery cell 2 is installed in place in the installation cavity 11, the present embodiment further provides a displacement sensor 6 in the connection groove 110 for detecting the depth of the connection column 42 inserted into the connection groove 110. The displacement sensor 6 is electrically connected to the control module. During the installation of the battery cell 2, when the connector 4 with the battery cell 2 is inserted into the connection groove 110 through the connection column 42, the displacement sensor 6 can scan the embedding length of the connection column 42, thereby determining whether the connector 4 is installed in place, and providing feedback through the control module. Vacuuming can only be performed after the connector 4 is installed in place.

[0062] As some optional embodiments, the adsorption assembly 3 also includes a vacuum sensor 34 electrically connected to the control module, and the vacuum sensor 34 is arranged on the suction pipe 31 between the installation cavity 11 and the electromagnetic butterfly valve 33. The vacuum degree in the connection cavity 411 can be obtained through the vacuum sensor 34, and the vacuum sensor 34 and the diaphragm pressure sensor 5 cooperate to monitor the adhesion force of the battery cell 2 in the height direction. Only when the data collected by the vacuum degree and the diaphragm pressure sensor 5 meet the set requirements, the vacuum pump 32 will stop working, so as to ensure that the bottom surface of the battery cell 2 can be firmly adsorbed and ensure that the adhesion force meets the set requirements.

[0063] As some preferred implementation methods, in order to ensure the sealing of the connecting cavity 411 after vacuuming, the present 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, so as to ensure the vacuum degree in the connecting cavity 411, improve the installation strength of the battery cell 2 in the connecting cavity 411, and ensure that the adhesion meets the requirements.

[0064] Since the diaphragm pressure sensor is arranged on the inner bottom surface of the connecting sleeve 41, and the connecting member 4 is separated from the box body 1, in order to realize that the diaphragm pressure sensor can establish an electrical connection with the control module, the present embodiment provides a first docking terminal L1 on the inner bottom surface of the installation cavity 11, and the first docking terminal L1 is electrically connected to the control module, and a second docking terminal L2 connected to the first docking terminal L1 is fixedly arranged on the bottom surface of the connecting sleeve 41, and the second docking terminal L2 is electrically connected to the diaphragm pressure sensor. Thus, when the connecting member 4 is completely installed in the installation cavity 11, the first docking terminal L1 and the second docking terminal L2 are electrically connected, thereby realizing the 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] See 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 cell 2 of the battery pack disclosed in the above embodiment, and includes the following steps;

[0067] S1. Input the required adhesion force for installing the battery cell 2 into the control module through the upper 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 mounting 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, vacuum the installation cavity 11, and 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;

[0069] In this step, the judgment of whether the connecting member 4 is installed in the installation cavity 11 is monitored by the displacement sensor 6 set in the connecting groove 110. Only when the connecting member 4 is installed in place, the control module will send a control signal to control the electromagnetic butterfly valve 33 and the vacuum pump 32 to start. If the installation is not in place, 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 close;

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

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

[0073] The battery pack disclosed in the present invention can, during the R&D testing stage, the mass production stage and the after-sales maintenance stage, when the battery cells need to be replaced or repaired, the battery cells that need to be replaced or repaired can be taken out through the vacuum adsorption between the contact battery cells and the box body, and the integrity of the battery cells can be maintained during disassembly, and new battery cells can be quickly replaced, thereby improving the 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 protection scope of the present invention.

Claims

1. A battery pack that is easy to disassemble and assemble, characterized in that: The battery pack comprises: 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 the installation cavity (11) in a one-to-one correspondence, and the outer contour of the battery cells (2) matches the inner contour of the installation cavity (11); The adsorption component (3) comprises 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).

2. The battery pack for easy disassembly and assembly of battery cells as claimed in claim 1, characterized in that: The invention also comprises a connecting member (4), the connecting member (4) comprising 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 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); 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) connected to 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).

3. The battery pack for easy disassembly and assembly of battery cells as claimed in claim 2, 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).

4. The battery pack for easy disassembly and assembly of battery cells as claimed in claim 3, 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).

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

6. The battery pack for easy disassembly and assembly of battery cells as claimed in claim 4, 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).

7. The battery pack for easy disassembly and assembly of battery cells as claimed in claim 2, characterized in that: The inner peripheral wall of the connecting cavity (411) is provided with an elastic layer (P) made of insulating material.

8. The battery pack for easy disassembly and assembly of battery cells as claimed in claim 4, characterized in that: The bottom surface of the installation cavity (11) is provided with a first docking terminal (L1), the first docking terminal (L1) is electrically connected to the control module, and the bottom surface of the connection sleeve (41) is fixedly provided with a second docking terminal (L2) connected to the first docking terminal (L1), the second docking terminal (L2) is electrically connected to the diaphragm pressure sensor (5).

9. A method for disassembling and assembling a battery pack, for realizing disassembling and assembling a battery cell of a battery pack for facilitating disassembling and assembling a battery cell as claimed in any one of claims 4 to 8, characterized in that: The steps include: S1. Inputting the tightness required 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 connection member (4) is installed in the installation cavity (11), the control module controls the electromagnetic butterfly valve (33) and the vacuum pump (32) to open, and vacuum suction is performed in the installation cavity (11), so as to discharge the air in 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 to eliminate the vacuum suction on the bottom of the battery cell (2), so that the battery cell (2) can be removed from the connector (4).

10. The method for disassembling and assembling a battery pack according to claim 9, wherein: In step S4, after the vacuum suction force is eliminated, the connecting member (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 connecting cavity (411).

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