Module rapid disassembly and assembly structure and battery pack thereof

Abstract

The utility model relates to the field of power battery structures, and discloses a module quick disassembly and assembly structure and a battery pack thereof, the module quick disassembly and assembly structure comprises a fixed box and a battery cell module mounted in the fixed box, the fixed box comprises a lower box body and an upper cover, a first mounting part and a second mounting part which are clamped with each other are arranged between the lower box body and the battery cell module, the first mounting part and the second mounting part are respectively mounted at the bottom of the battery cell module and the upper part of the lower box body, a containing groove for containing the battery cell module is formed in the upper part of the lower box body, the second mounting part is mounted in the containing groove, and a self-locking chuck is arranged at the lower end of the first mounting part; and the second mounting part comprises an outer shell and a pressing unlocking device for controlling the self-locking chuck to be locked or unlocked. In practical application, the problems of difficulty in dismounting and mounting and low dismounting and mounting efficiency of the battery cell module in the prior art are solved.

Description

Technical Field

[0001] The utility model relates to the field of power battery structures, and in particular to a module quick disassembly and assembly structure and a battery pack thereof. Background Art

[0002] As energy and environmental issues become increasingly severe, countries around the world are increasing their research and development efforts in new energy vehicles. As an important component of electric vehicles, power batteries are imperative for their research and development.

[0003] The power battery exists in the form of a battery pack, which mainly includes a lower box, a battery module and its fixing device. At present, most of the existing technologies fix the battery module to the lower box mainly through two methods:

[0004] 1. Glue bonding: When using glue to bond battery modules, it is necessary to wait for the glue to completely cure to ensure structural stability, which will extend the production cycle and reduce production efficiency. Secondly, when the battery module fixed with glue needs to be repaired or the battery is recycled, the separation process is more difficult, which may cause damage to the battery cell, increase repair costs and environmental protection treatment difficulties. Moreover, the amount and uniformity of the glue directly affect the fixing effect, and high requirements are placed on the production process and quality control. Improper glue application may lead to loose fixation or internal short circuit risks.

[0005] 2. Bolt fixing: When fixing the battery cell module with bolts, the bolt fixing points are prone to become stress concentration areas, especially when the battery cell expands and contracts during battery charging and discharging, which may cause the bolts to loosen or the shell to be damaged, affecting the sealing and safety of the battery. In addition, bolt fixing requires precise drilling, assembly and other steps, which increases production costs and process complexity. Secondly, in order to ensure the stability of the battery cell module connection, a large number of bolts are required, which takes a lot of time during the installation and disassembly process, resulting in low efficiency and high cost.

[0006] Therefore, in order to solve the above-mentioned problems of difficult installation and disassembly, high cost, low efficiency, etc., this solution provides a module quick disassembly and assembly structure and its battery pack. Utility Model Content

[0007] The utility model aims to provide a module quick disassembly and assembly structure and a battery pack thereof, so as to solve the problems of difficult disassembly and assembly of battery core modules and low disassembly and assembly efficiency in the prior art.

[0008] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solution: a module quick disassembly and assembly structure, including a first mounting part and a second mounting part that are clamped to each other, the first mounting part and the second mounting part are respectively installed at the bottom of the battery module and the upper part of the lower box body, the upper part of the lower box body is provided with a receiving groove for accommodating the battery module, the second mounting part is installed in the receiving groove, the lower end of the first mounting part is provided with a self-locking clamp, and the second mounting part includes an outer shell and a press-unlocking device for controlling the locking or opening of the self-locking clamp.

[0009] The principles and advantages of this solution are:

[0010] Compared with the prior art, in which glue bonding requires waiting for the glue to solidify and subsequent disassembly is difficult, and in bolt connection, a large number of bolts need to be installed or removed, which consumes a long time. In actual application, in this solution, the first mounting part and the second mounting part are fixed on the battery module and the lower box respectively. During installation, the battery module is aligned with the accommodating groove, and the first rotating part and the second mounting part are aligned accordingly, reducing the alignment time between the first mounting part and the second mounting part, achieving rapid and accurate positioning of the battery module installation position, and improving installation efficiency; then, the unlocking device is pressed to control the self-locking clamp to lock to achieve clamping between the first rotating part and the second mounting part, thereby fixing the battery module; pressing the unlocking device to control the self-locking clamp to open, the fixed relationship between the first mounting part and the second mounting part is released, and the battery module can be removed by taking it out upwards. The operation is simple and the installation and disassembly efficiency is high. In addition, in this solution, the battery module is easily disassembled by pressing the unlocking device to control the self-locking clamp to open, which reduces the damage to the battery module during the disassembly process, greatly ensures the safety of the battery module, and reduces the inspection and maintenance cost of the power battery.

[0011] Furthermore, the push-to-unlock device is fixed to the bottom of the inner cavity of the outer shell by a compression spring. The push-to-unlock device includes a guide rod and a self-locking buckle that controls the locking or opening of the self-locking clamp. The outer shell is provided with a guide groove that cooperates with the guide rod. The guide groove includes a first guide section and a second guide section. The inclination of the second guide section is greater than that of the first guide section, and a step is provided at the junction of the two.

[0012] The step in the above setting is to ensure that the guide rod can only move along the first guide groove to the second guide groove and will not move back, so as to realize the rapid fixation and disassembly of the battery cell module which is fixed by one press and disassembled by two presses. The guide rod crosses the step from the first guide section to the second guide section. Under the action of the compression spring, the guide rod of the press-to-unlock device moves upward along the second guide section and gradually disengages from the guide groove, so that the fixation between the self-locking clamp and the press-to-unlock device is released.

[0013] Furthermore, the outer shell of the second mounting portion is embedded in the accommodating groove, and the plane where the top end of the second mounting portion is located is lower than the upper surface of the lower box body.

[0014] The outer shell of the second mounting part is embedded in the accommodating groove, which is beneficial to reducing the space occupied by the second mounting part on the lower box body. The battery cell module and the lower box body are more compact, which is beneficial to reducing the suspension distance between the two and avoiding the battery cell module from shaking and causing excessive fatigue strength at the connection; the plane where the top end of the second mounting part is located is lower than the upper surface of the lower box body, so that the second mounting part is completely located in the closed space formed by the battery cell module and the lower box body, saving installation space and reducing the overall volume of the battery pack. At the same time, the accommodating groove is used to protect the second mounting part to avoid damage during transportation and increase material loss.

[0015] Furthermore, the first mounting portion is provided with bolt holes for fixing the battery cell module.

[0016] The above arrangement allows the first mounting portion to be detachably fixed to the bottom of the battery cell module by passing bolts through the bolt holes, so that if the first mounting portion is damaged later, it can be simply replaced without damaging the battery cell module.

[0017] The utility model also provides a technical solution: a battery pack, including a fixed box and a battery cell module installed in the fixed box, the fixed box including a lower box body and an upper cover, the lower box body and the battery cell module are detachably connected through the first mounting portion and the second mounting portion, and the lower box body and the box cover are bolted.

[0018] The principles and advantages of this solution are:

[0019] 1. In actual application, the battery module of this solution is connected to the lower box body by a first mounting portion and a second mounting portion. During installation, it is only necessary to align the battery module with the receiving groove on the lower box body to achieve alignment between the first mounting portion and the second mounting portion. Then, the self-locking clamp is pressed downward to be locked and fixed by the self-locking buckle to achieve connection between the two. Press again, and the guide rod crosses the step from the first guide section to the second guide section. Under the action of the compression spring, the guide rod moves upward along the second guide section and gradually disengages from the guide groove. Pressing the unlocking device moves upward, so that the self-locking The fixation between the clamp head and the self-locking clamp is released, and the fixation between the first mounting part and the second mounting part is released, so that the battery module can be disassembled; compared with the prior art in which glue bonding requires waiting for glue to solidify and subsequent disassembly is difficult, and a large number of bolts need to be installed or removed during bolt connection, not only is the disassembly time long, but the alignment between each bolt and the threaded hole takes a lot of time, and the installation speed is slow, this solution uses the accommodating groove for rapid alignment, and presses the unlocking device to control the locking or opening of the self-locking clamp head, so that the battery module can be easily and quickly installed and disassembled, greatly improving the installation efficiency.

[0020] 2. In this solution, the first mounting part and the second mounting part realize self-locking between the battery module and the lower box body through the self-locking clamp and the self-locking buckle, so that the battery module can remain locked when subjected to vibration and impact during vehicle use, the internal structure of the power battery is more stable, and the power battery is more reliable.

[0021] 3. Compared with the existing bolt fixation, this solution uses the first mounting part and the second mounting part for clamping fixation, which reduces the number of bolts and the area occupied by the corresponding bolt holes, saves installation space, improves the battery volume utilization rate, and also reduces the overall volume of the power battery, and reduces the cost of consumables required for the fixing box.

[0022] Furthermore, after the first mounting portion is engaged with the second mounting portion, the surface where the top end of the second mounting portion is located is lower than the upper surface of the lower box body.

[0023] The above arrangement ensures that after the battery cell module is connected and fixed to the lower box body, the lower part of the battery cell module is located in the accommodating groove, and the accommodating groove limits and fixes the battery cell module to prevent the battery cell module from shaking due to the lack of side fixation during vehicle operation, which may easily damage the connection relationship between the first mounting part and the second mounting part, affecting the safety of the power battery.

[0024] Furthermore, the self-locking buckle of the second mounting portion is located in the accommodating groove, and the surface where the highest point of the second mounting portion is located is lower than the upper surface of the lower box body.

[0025] The above arrangement allows part of the battery cell module to enter the receiving groove after installation. In addition to the clamping fixation, the receiving groove also has a limiting and fixing effect on the battery cell module, thereby increasing the stability of the internal structure of the battery pack. The first mounting portion and the second mounting portion are completely located in the enclosed space formed by the battery cell module and the lower box body, saving installation space and reducing the overall volume of the battery pack.

[0026] Furthermore, a positioning protrusion is provided on the side of the battery module, and a positioning groove that matches the positioning protrusion is opened on the side of the accommodating groove.

[0027] In the above setting, the positioning protrusion and the positioning groove cooperate with each other to make the positioning between the battery module and the lower box more precise, which plays an installation guide role. At the same time, the first mounting part and the second mounting part are aligned, which reduces the time for finding the alignment between the two and improves the installation efficiency.

[0028] Furthermore, the upper portion of the positioning groove is a wedge-shaped opening that gradually becomes larger from bottom to top.

[0029] Setting the upper part of the positioning groove as a wedge-shaped opening with a gradually larger opening makes it easier for the positioning protrusions on the side of the battery cell module to have greater flexibility in finding the correct alignment position. The positioning protrusions can gradually slide down along the wedge-shaped opening and be fixed in the lower part of the positioning groove, which reduces the requirements for the alignment accuracy between the positioning protrusions and the positioning groove, and effectively improves the installation efficiency.

[0030] Furthermore, a limiting protrusion is provided on the inner side of the upper wall of the box cover.

[0031] The battery cell module and the lower box body are fixed by clamping between the first mounting part and the second mounting part. After fixation, the battery cell module can be released by pressing downward again to realize the disassembly of the battery cell module. During the use of the vehicle, when the road conditions are bad or the road surface is very undulating, the vehicle may follow the undulations and easily cause the battery cell module to exert downward pressure on the second mounting part and loosen, and the battery cell module may be easily damaged. The limiting protrusion on the top of the box cover will completely press the battery cell module, avoiding the occurrence of the aforementioned situation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is an exploded diagram of an embodiment of the present invention.

[0033] Figure 2 This is a schematic diagram of the module quick disassembly and assembly structure of an embodiment of the utility model.

[0034] Figure 3 This is a schematic diagram of the second mounting portion of an embodiment of the present invention (the structure after removing the outer shell).

[0035] Figure 4 This is a schematic diagram of the lower box structure of an embodiment of the present utility model. DETAILED DESCRIPTION

[0036] The following is further described in detail through specific implementation methods:

[0037] The figure marks in the drawings of the specification include: box cover 1, battery cell module 2, positioning protrusion 21, lower box body 3, accommodating groove 31, positioning groove 32, first mounting part 4, self-locking clamp 41, second mounting part 5, outer shell 51, first guide section 511, second guide section 512, compression spring 52, self-locking buckle 53, guide rod 54.

[0038] Example

[0039] A module quick disassembly and assembly structure and its battery pack, such as Figure 1As shown, it includes a fixed box and a battery module 2 installed in the fixed box, the fixed box includes a box cover 1 and a lower box body 3, and the lower box body 3 and the box cover 1 are fixed by bolts; a module quick disassembly structure is provided between the battery module 2 and the lower box body 3, and the module quick disassembly structure includes a first mounting portion 4 and a second mounting portion 5 that are clamped to each other, and the first mounting portion 4 and the second mounting portion 5 are respectively installed on the upper part of the lower box body 3 at the bottom of the battery module 2, and a receiving groove 31 for accommodating the battery module 2 is opened on the lower box body 3, and the second mounting portion 5 is installed in the receiving groove 31.

[0040] like Figure 2 、 Figure 3 As shown in the combination, the first mounting portion 4 is T-shaped, and a bolt hole is opened on the first mounting portion 4 and a bolt is installed to realize the connection and fixation between the first mounting portion 4 and the battery module 2. The lower end of the first mounting portion 4 is provided with a self-locking clamp 41, and the cross-section of the self-locking clamp 41 is a trapezoid with a larger upper part and a smaller lower part; the second mounting portion 5 includes an outer shell 51 and a press-unlocking device for controlling the locking or opening of the self-locking clamp 41. The outer shell 51 is embedded in the accommodating groove 31. The plane where the top of the second mounting portion 5 is located is lower than the upper surface of the lower box 3. When the first mounting portion 4 and the second mounting portion 5 are clamped and fixed, the upper surface of the first mounting portion 4 is lower than the upper surface of the lower box 3, as shown in FIG. In this way, the accommodating groove 31 plays a limiting and protective role on the battery module 2, so that the battery module 2 is fixed more firmly in the fixed box; the press-to-unlock device is connected and fixed to the bottom of the inner cavity of the outer shell 51 through the compression spring 52, and the press-to-unlock device includes a self-locking buckle 53 and a guide rod 54 for controlling the locking or opening of the self-locking clamp 41. The side of the outer shell 51 is provided with a guide groove for the guide rod 54 to move, and the guide groove includes a first guide section 511 and a second guide section 512. The inclination of the second guide section 512 is greater than that of the first guide section 511, and a step is provided at the junction of the two to ensure that the guide rod 54 can only move from the first guide groove to the second guide groove and will not reverse.

[0041] like Figure 1 、 Figure 4 As shown in the figure, the accommodating groove 31 on the lower box body 3 has a positioning groove 32 in the middle position of the two shorter sides. The upper part of the positioning groove 32 is a wedge-shaped opening (not shown in the figure) that gradually becomes larger from bottom to top. The bottom of the wedge-shaped opening is connected to the positioning groove 32. The battery cell module 2 is provided with a positioning protrusion 21 that cooperates with the positioning groove 32 on the corresponding side. During installation, the positioning groove 32 and the wedge-shaped opening on the upper part facilitate the positioning protrusion 21 to have greater flexibility in finding the alignment position. The positioning protrusion 21 can gradually slide down along the wedge-shaped opening to the lower part of the positioning groove 32 for fixation, reducing the alignment accuracy requirements between the positioning protrusion 21 and the positioning groove 32.

[0042] Furthermore, in order to prevent the battery module 2 from being abnormally loosened due to vibration and impact, a limiting protrusion (not shown in the figure) is provided on the inner side of the upper wall of the box cover 1. The limiting protrusion is strip-shaped and corresponds to the position of the accommodating groove 31.

[0043] The specific implementation process is as follows:

[0044] In specific application, the first mounting part 4 and the second mounting part 5 are fixedly installed on the battery cell module 2 and the lower box body 3 respectively, and then the positioning protrusion 21 on the side of the battery cell module 2 is aligned with the positioning groove 32 on the lower box body 3, so that the battery cell module 2 is aligned with the accommodating groove 31 and the first mounting part 4 and the second mounting part 5, and the battery cell module 2 is pressed downward, the positioning protrusion 21 slides into the positioning groove 32, and the self-locking clamp 41 of the first mounting part 4 slides into the self-locking buckle 53 on the second mounting part 5, and the guide rod 54 is fixed in the first guide section 511 to achieve self-locking fixation, and then the box cover 1 is put on the battery cell module 2, and the lower box body 3 and the box cover 1 are fixed with bolts. The limiting protrusion on the top of the box cover 1 presses the battery cell module 2 to prevent it from loosening, and the overall installation of the battery pack is completed.

[0045] In addition, when the battery module 2 needs to be repaired or replaced, first release the bolts and remove the box cover 1, then press the battery module 2 downward. During the pressing process, the guide rod 54 enters the second guide section 512 from the first guide section 511. After the pressing is released, the fastening structure 52 and the first mounting part 4 move upward under the upward elastic force of the compression spring 52, and the restriction of the outer shell 51 on the self-locking buckle 53 is released. The self-locking clip 41 can be taken out, and the fixation between the battery module 2 and the lower box body 3 is released, realizing quick disassembly.

[0046] The above description is merely an embodiment of the present invention, and the commonly known specific technical solutions and / or features of the solution are not described in detail here. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several variations and improvements can be made, which should also be considered as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection claimed in this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A module quick disassembly and assembly structure, characterized in that: It includes a first mounting part and a second mounting part which are clamped together. The first mounting part and the second mounting part are respectively mounted on the bottom of the battery cell module and the upper part of the lower box body. The upper part of the lower box body is provided with a receiving groove for accommodating the battery cell module. The second mounting part is installed in the receiving groove. The lower end of the first mounting part is provided with a self-locking clamp. The second mounting part includes an outer shell and a press-unlocking device for controlling the locking or opening of the self-locking clamp.

2. The module quick disassembly and assembly structure according to claim 1, characterized in that: The push-to-unlock device is fixed to the bottom of the inner cavity of the outer shell by a compression spring. The push-to-unlock device includes a guide rod and a self-locking buckle that controls the locking or opening of the self-locking clamp. The outer shell is provided with a guide groove that cooperates with the guide rod. The guide groove includes a first guide section and a second guide section. The inclination of the second guide section is greater than that of the first guide section, and a step is provided at the junction of the two.

3. The module quick disassembly and assembly structure according to claim 2, characterized in that: The outer shell of the second mounting portion is embedded in the accommodating groove, and the plane where the top end of the second mounting portion is located is lower than the upper surface of the lower box body.

4. The module quick disassembly and assembly structure according to claim 3, characterized in that: The first mounting portion is provided with bolt holes for fixing the battery core module.

5. A battery pack, comprising a fixed box and a battery cell module installed in the fixed box, wherein the fixed box comprises a lower box body and a box cover, characterized in that: The lower box body and the battery cell module are detachably connected via the first mounting portion and the second mounting portion as described in any one of claims 1 to 4, and the lower box body and the box cover are connected via bolts.

6. A battery pack according to claim 5, characterized in that: After the first mounting portion is engaged with the second mounting portion, the surface where the top end of the second mounting portion is located is lower than the upper surface of the lower box body.

7. A battery pack according to claim 6, characterized in that: The side of the battery module is provided with a positioning protrusion, and the side of the accommodating groove is provided with a positioning groove matched with the positioning protrusion.

8. A battery pack according to claim 7, characterized in that: The upper portion of the positioning groove is a wedge-shaped opening that gradually becomes larger from bottom to top.

9. A battery pack according to claim 8, characterized in that: A limiting protrusion is provided on the inner side of the upper wall of the box cover.

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