A battery module binding band installation tool and a battery pack

Abstract

This invention provides a battery module strap installation fixture and battery pack, belonging to the field of battery manufacturing technology. It includes: a first extrusion mechanism and a second extrusion mechanism, respectively disposed on both sides of the module battery; multiple extrusion components. The first and second extrusion mechanisms drive some or all of the extrusion components to move closer to or away from the module battery to press or loosen the end plates at both ends of the module battery. During the strap installation process, extrusion components that interfere with the strap move away from the module battery, while extrusion components that do not interfere with the strap move closer to the module battery. Beneficial effects: By adopting a segmented end plate pressing method, extrusion components that interfere with the strap move away, while those that do not interfere move closer to the module battery. This ensures that the strap is installed while maintaining the required pre-tightening force for the battery, resulting in more uniform stress on the end plate at each stage of strap insertion and less end plate deformation. Simultaneously, straps can also be installed at the tooling pressing position, increasing the number of straps and reducing end plate deformation and stress on individual straps.

Description

Technical Field

[0001] This invention relates to the field of battery manufacturing technology, and in particular to a battery module strapping installation fixture and a battery pack. Background Technology

[0002] A battery module includes a battery pack and end plates located at both ends of the battery pack, wherein the battery pack contains multiple module batteries. During the assembly of the battery module, straps are used to clamp and secure the module batteries.

[0003] Traditional module strap installation fixtures, such as Figure 1 As shown, the two stroke submechanisms of the tooling 100 are typically used to press the middle position of the first end plate 2 and the second end plate 3, and then the straps 4 are put into the designated positions of the module from both sides of the module battery 1.

[0004] However, due to the large preload required for stacking battery modules, simply pressing down on the middle of the end plate can lead to excessive deformation at both ends, making it risky for the binding straps to fail to fit smoothly into the module, thus affecting the assembly efficiency and quality of the battery module. Furthermore, the binding straps cannot be installed at the tooling crimping locations, further limiting the installation layout of the binding straps and the overall structural design of the battery module. Summary of the Invention

[0005] To address the above technical problems, the present invention provides a battery module strapping installation fixture; in addition, it also provides a battery pack.

[0006] The technical problem solved by this invention can be achieved by the following technical solutions:

[0007] A battery module strapping mounting fixture, comprising:

[0008] The first extrusion mechanism is located on one side of the module battery;

[0009] The second extrusion mechanism is located on the other side of the module battery;

[0010] Multiple extrusion components are respectively installed at the ends of the first extrusion mechanism and the second extrusion mechanism. The first extrusion mechanism and the second extrusion mechanism drive some or all of the extrusion components to move closer to or away from the module battery to press or release the end plates at both ends of the module battery.

[0011] During the installation process with the straps, the pressing components that interfere with the straps are kept away from the module battery, while the pressing components that do not interfere with the straps are kept close to the module battery.

[0012] Preferably, the first extrusion mechanism includes:

[0013] The first fixed seat is installed on the tooling base;

[0014] Multiple first-stroke sub-mechanisms are provided, with one end of each first-stroke sub-mechanism mounted on the first fixed base, and the other end of each first-stroke sub-mechanism serving as the end of the first extrusion mechanism for mounting the extrusion component.

[0015] Preferably, the second extrusion mechanism includes:

[0016] The second fixed seat is installed on the tooling base;

[0017] Multiple second-stroke sub-mechanisms are provided, with one end of each second-stroke sub-mechanism mounted on the second fixed base, and the other end of each second-stroke sub-mechanism serving as the end of the second extrusion mechanism for mounting the extrusion component.

[0018] Preferably, the first stroke submechanism is a telescopic structure.

[0019] Preferably, the second stroke submechanism is a telescopic structure.

[0020] Preferably, it further includes: a third extrusion mechanism disposed above the module battery, wherein the extrusion component is mounted at the end of the third extrusion mechanism.

[0021] Preferably, the squeezing member that interferes with the strap returns to the module battery after it de-interferes with the strap.

[0022] Preferably, the extrusion component includes a pressure block.

[0023] Preferably, the straps comprise at least two.

[0024] On the other hand, a battery pack is also provided, including at least one battery module, which is strapped and installed using the battery module strapping installation fixture as described above.

[0025] The advantages or beneficial effects of the technical solution of this invention are as follows:

[0026] This invention uses multiple pressing components to partially or completely approach or move away from the module battery to press or loosen the end plate. During the installation of the straps, a segmented pressing method is used to press the end plate, keeping the pressing components that interfere with the straps away from the module battery and those that do not interfere with the straps close to the module battery. This ensures that the straps are installed while maintaining the required pre-tightening force for the battery, resulting in more uniform stress on the end plate and less deformation at each stage of strap insertion. At the same time, straps can also be installed at the tooling pressing position. By increasing the number of straps, end plate deformation and stress on individual straps are reduced, thus minimizing end plate deformation. Attached Figure Description

[0027] Figure 1 This is a structural diagram of a traditional module strapping installation fixture in the existing technology;

[0028] Figure 2 This is a schematic diagram of the structure of the battery module strapping installation fixture in a preferred embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the installation of the double straps in a preferred embodiment of the present invention;

[0030] Figures 4A-4F This is a schematic diagram of the stroke sub-mechanism of each step in the double strap installation method in a preferred embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of the installation of multiple straps in a preferred embodiment of the present invention. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0035] In a preferred embodiment of the present invention, based on the above-mentioned problems existing in the prior art, a battery module strapping installation fixture is provided, such as... Figure 2 As shown, it includes:

[0036] The first extrusion mechanism 5 is located on one side of the module battery 1;

[0037] The second extrusion mechanism 6 is located on the other side of the module battery 1;

[0038] Multiple extrusion components 7 are respectively installed at the ends of the first extrusion mechanism 5 and the second extrusion mechanism 6. The first extrusion mechanism 5 and the second extrusion mechanism 6 drive some or all of the extrusion components 7 to approach or move away from the module battery 1, so as to press or loosen the first end plate 2 and the second end plate 3 at both ends of the module battery 1.

[0039] During the installation of the strap 4, the pressing component 7 that interferes with the strap 4 is away from the module battery 1, while the pressing component 7 that does not interfere with the strap 4 is close to the module battery 1.

[0040] Specifically, traditional module binding strap installation fixtures only press down on the middle of the end plate, which cannot meet the preload required for battery module stacking. This also leads to excessive deformation at both ends of the end plate, increasing the risk that the binding straps may not be able to be smoothly fitted into the module. Furthermore, binding straps cannot be installed at the pressing points of the fixture.

[0041] In this embodiment, by setting multiple extrusion components 7, the extrusion components 7 located on both sides of the battery module are close to or far away from the battery module to press or loosen the end plate, ensuring that the pre-tightening force required when stacking battery modules is achieved.

[0042] When installing the strap 4, a segmented pressing end plate method is adopted. Some or all of the multiple pressing components 7 are close to or far away from the module battery. The pressing components 7 that interfere with the strap 4 are far away, while those that do not interfere are close to the module battery 1. This ensures that the strap 4 is installed while ensuring the required pre-tightening force of the battery. This makes the end plate more evenly stressed at each stage of strap insertion, and the end plate deformation is smaller, ensuring that the strap 4 can be installed smoothly.

[0043] The extrusion component 7 that interferes with the strap 4 refers to the extrusion component 7 located at the position where the strap 4 will pass next during the process of inserting the strap 4 into the battery module, or at the position where the strap is placed. Extrusion components 7 at other positions do not interfere with the strap 4.

[0044] In a preferred embodiment, the first extrusion mechanism 5 includes:

[0045] The first fixed seat 51 is installed on the tooling base (not shown in the figure);

[0046] Multiple first-stroke sub-mechanisms 52, one end of each first-stroke sub-mechanism 52 is mounted on the first fixed base 51, and the other end of each first-stroke sub-mechanism 52 serves as the end of the first extrusion mechanism 5 for mounting the extrusion component 7.

[0047] Specifically, the first fixed base 51 can be a fixed plate. The fixed plate can be fixedly installed on the tooling base using fasteners such as screws and bolts.

[0048] One end of all first stroke submechanisms 52 can be fixedly installed on the first fixed base 51 using fasteners such as screws and bolts, and the extrusion component 7 is fixedly installed at its end.

[0049] In a preferred embodiment, the second extrusion mechanism 6 includes:

[0050] The second fixed seat 61 is installed on the tooling base;

[0051] Multiple second-stroke sub-mechanisms 62, one end of each second-stroke sub-mechanism 62 is mounted on the second fixed base 61, and the other end of each second-stroke sub-mechanism 62 serves as the end of the second extrusion mechanism 6 for mounting the extrusion component 7.

[0052] Specifically, the second fixed base 61 can be a fixed plate. The fixed plate can be fixedly installed on the tooling base using fasteners such as screws and bolts.

[0053] One end of all second stroke submechanisms 62 can be fixedly installed on the second fixed base 61 using fasteners such as screws and bolts, and the end of the submechanism is fixedly installed with the extrusion component 7.

[0054] The stroke sub-mechanisms in the first extrusion mechanism 5 and the second extrusion mechanism 6 are respectively located on both sides of the battery module in a one-to-one correspondence and symmetrically.

[0055] The stroke sub-mechanism that presses against the end plate is divided into multiple parts. As the strap is being inserted from the outside, the stroke sub-mechanism that interferes with the strap moves backward, while the stroke sub-mechanisms at other positions continue to press against the end plate to prevent severe deformation and allow the strap to be inserted. After the corresponding stroke sub-mechanism is released, the strap can be inserted at that position.

[0056] In a preferred embodiment, the first stroke submechanism 52 is a telescopic structure.

[0057] In a preferred embodiment, the second stroke submechanism 62 is a telescopic structure.

[0058] In this embodiment, the extrusion mechanism includes 2N telescopic structures, where N is a positive integer greater than 1. The first to Nth telescopic structures serve as the first stroke sub-mechanism 52 of the first extrusion mechanism 5, and the (N+1)th to 2Nth telescopic structures serve as the second stroke sub-mechanism 62 of the second extrusion mechanism 6. The first to Nth telescopic structures correspond one-to-one with the (N+1)th to 2Nth telescopic structures and are symmetrically arranged on both sides of the battery module.

[0059] Each telescopic structure corresponds to an independent drive structure, which can use an existing drive motor to control its respective telescopic state.

[0060] The telescopic structures at corresponding positions on both sides of the battery module are a pair, and the telescopic states of each pair of telescopic structures are consistent.

[0061] In the initial state, all the drive structures control their respective telescopic structures to extend, so as to press the end plate of the battery module, so as to ensure that the force on each position on the end plate is more uniform, and to avoid deformation of the end plate while ensuring the required pre-tightening force of the battery.

[0062] During the process of inserting the strap 4 into the battery module, for the extrusion component 7 that interferes with the strap 4, the corresponding telescopic structure is contracted by the drive structure; for the extrusion component 7 that does not interfere with the strap 4, its extended state remains unchanged.

[0063] In a preferred embodiment, the device further includes a third extrusion mechanism 9, which is disposed above the module battery 1, and an extrusion component 7 is installed at the end of the third extrusion mechanism 9.

[0064] Specifically, in this embodiment, the third extrusion mechanism 9 is also implemented using a telescopic structure. The extrusion component 7 installed at the end of the third extrusion mechanism 9 is a plate-shaped pressure block with a length approximately the same as the length of the battery module, which is used to limit the battery module and prevent the battery 1 of the module from sliding in the height direction.

[0065] The structure of the third extrusion mechanism 9 is the same as that of the first extrusion mechanism 5 and the second extrusion mechanism 6. Figures 2 to 5 The fixed seat and telescopic structure of the third extrusion mechanism 9 are omitted from the display and will not be shown again here.

[0066] The aforementioned telescopic structure may include a fixed tube, a telescopic tube, a motor, and a transmission component. The fixed tube is fixedly mounted on a fixed plate and sleeved over the telescopic tube. The motor is fixed to the fixed plate by bolts or welding. The motor's output shaft is connected to the telescopic tube via a transmission component (such as a gear and rack pair). When the motor starts, its output shaft rotates, and the gear connected to the output shaft rotates accordingly. Because the gear and the rack fixed to the telescopic tube mesh with each other, the rotation of the gear drives the rack to move linearly, thereby driving the telescopic tube to extend and retract along the fixed tube.

[0067] It should be noted that the telescopic structure used in the embodiments of the present invention is an existing conventional telescopic structure, and the implementation principle of the driving structure to drive its telescopic movement is existing common knowledge, and will not be described in detail here.

[0068] In a preferred embodiment, the squeezing member 7 that interferes with the strap 4 returns to the module battery 1 after the interference with the strap 4 is resolved.

[0069] The so-called "interference with the strap 4" refers to the situation where, during the process of the strap 4 being inserted into the battery module, the extrusion component 7 is located at a position that the strap 4 has already passed, and this position is not the intended placement position of the strap.

[0070] For the extrusion component 7 that is free from interference with the strap 4, it is re-driven to extend and press the end plate of the battery module again to install the strap 4 while ensuring the required pre-tightening force of the battery. This makes the end plate more evenly stressed at each stage of strap insertion and reduces the deformation of the end plate.

[0071] In a preferred embodiment, the extrusion component 7 includes a pressure block.

[0072] Specifically, in this embodiment, when the telescopic structure of the stroke submechanism is in the extended state, the pressure block will contact the end plates at both ends of the battery module, and the telescopic structures on both sides will press down on the end plates, providing the pre-tightening force required for battery stacking.

[0073] Since there are multiple stroke submechanisms, there are also multiple pressure blocks. The presence of multiple pressure blocks ensures that the end plate is subjected to uniform force at each stage of strap insertion.

[0074] During the initial stage of strap insertion, all pressure blocks are pressed simultaneously, distributing the pressure applied to the end plate and preventing excessive local stress on the end plate, which could lead to deformation.

[0075] As the strap is inserted, some of the pressure blocks loosen, providing some room for the strap to be inserted, while others remain pressed down, distributing the pressure evenly across the end plate until the strap is fully inserted.

[0076] In a preferred embodiment, the straps 4 include at least two.

[0077] Specifically, the number of straps 4 is at least two. Generally, two straps 4 are usually used, which can ensure the stability of the battery module to a certain extent and provide the necessary support for the end plate.

[0078] Furthermore, the tooling crimping position in this embodiment can also be fitted with straps. In order to further improve the performance and reliability of the battery module, in practical applications, the number of straps 4 can be three or more, for example, it can be set to 3, 4, 5, 6 or more.

[0079] With the increase in the number of straps, the pressure on the battery module end plate can be more evenly distributed to each strap, greatly reducing the possibility of deformation of the end plate due to uneven stress, and also reducing the tensile force on each strap. The reduced load on each strap not only reduces the risk of strap breakage or damage, but also further enhances the structural stability of the entire battery module.

[0080] On the other hand, a battery pack is also provided, including at least one battery module, which is strapped and installed using the battery module strapping installation fixture described above.

[0081] like Figure 3As shown, taking the number of telescopic structures N as an example of 7, it includes the first to the fourteenth telescopic structures. The first to the seventh telescopic structures are located on one side of the battery module, and the eighth to the fourteenth telescopic structures are located on the opposite side of the battery module. The first to the seventh telescopic structures correspond one-to-one with the eighth to the fourteenth telescopic structures and are arranged symmetrically.

[0082] Taking a setup with two straps as an example, such as Figures 4A-4F A schematic diagram of the stroke submechanism for each step of the double-strap installation method is shown. The double-strap installation method includes the following steps:

[0083] Step 1, as follows Figure 4A As shown, the pressure blocks on all the stroke submechanisms are pressed against the end plates on both sides of the battery module, that is, the first to fourteenth telescopic structures are all in the extended state;

[0084] Step 2, as follows Figure 4B As shown, when the first strap 41 is put on, the first telescopic structure 81, the second telescopic structure 82, the eighth telescopic structure 88 and the ninth telescopic structure 89 are driven to retract, while the other telescopic structures remain extended. The first strap 41 is put on the battery module from one end, and the strap is moved to the corresponding position of the second telescopic structure 82 and the ninth telescopic structure 89 on the end plates at both ends.

[0085] Step 3, as follows Figure 4C As shown, the first telescopic structure 81 and the eighth telescopic structure 88 are driven to return to the extended state, while the second telescopic structure 82 and the ninth telescopic structure 89 remain in the retracted state.

[0086] At the same time, the third telescopic structure 83 and the tenth telescopic structure 810 are retracted, while the other telescopic structures remain extended. The first strap 41 is moved from the corresponding position of the second telescopic structure 82 and the ninth telescopic structure 89 to the corresponding position of the third telescopic structure 83 and the tenth telescopic structure 810, thus completing the insertion operation of the first strap 41.

[0087] Step 4, as follows Figure 4D As shown, the second telescopic structure 82 and the ninth telescopic structure 89 are driven to return to the extended state, while the third telescopic structure 83 and the tenth telescopic structure 810 remain in the retracted state and remain so in subsequent operations.

[0088] Step 5, as follows Figure 4E As shown, when the second strap 42 is inserted, the sixth telescopic structure 86, the seventh telescopic structure 87, the thirteenth telescopic structure 813, and the fourteenth telescopic structure 814 are driven to retract, so that the second strap 42 is inserted into the battery module from the other end, and the strap is moved to the corresponding position of the sixth telescopic structure 86 and the thirteenth telescopic structure 813 on the end plates at both ends.

[0089] Step 6, as follows Figure 4F As shown, the seventh telescopic structure 87 and the fourteenth telescopic structure 814 are driven to return to the extended state, while the sixth telescopic structure 86 and the thirteenth telescopic structure 813 remain in the retracted state.

[0090] At the same time, the fifth telescopic structure 85 and the twelfth telescopic structure 812 are retracted, and the second strap 42 is moved from the corresponding position of the sixth telescopic structure 86 and the thirteenth telescopic structure 813 to the corresponding position of the fifth telescopic structure 85 and the twelfth telescopic structure 812, thus completing the insertion operation of the second strap 42.

[0091] It drives the sixth telescopic structure 86 and the thirteenth telescopic structure 813 to return to the extended state, while the fifth telescopic structure 85 and the twelfth telescopic structure 812 remain in the contracted state.

[0092] like Figure 5 The diagram illustrates the installation of multiple straps. Extending or retracting the corresponding stroke submechanism allows for the installation of straps at those locations. The installation process can be referenced. Figures 4A-4F The steps. Figure 5 The diagram shows six straps; however, the number of straps is not limited to this. In other embodiments, the number of straps can be adjusted according to actual needs, and can be set to fewer or more straps.

[0093] The advantages or beneficial effects of the above technical solution are as follows: This invention uses multiple extrusion components to partially or completely approach or move away from the module battery to press or loosen the end plate. During the installation of the strap, a segmented pressing method is used to press the end plate, so that the extrusion components that interfere with the strap are kept away from the module battery and those that do not interfere are close to the module battery. This ensures that the strap is installed while ensuring the required pre-tightening force of the battery, making the end plate more evenly stressed at each stage of strap insertion and reducing the deformation of the end plate. At the same time, straps can also be installed at the tooling pressing position. By increasing the number of straps, the deformation of the end plate and the stress on a single strap are reduced, thus reducing the deformation of the end plate.

[0094] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should recognize that any equivalent substitutions and obvious changes made using the content of this specification and illustrations should be included within the protection scope of the present invention.

Claims

1. A battery module strapping installation fixture, characterized in that, include: The first extrusion mechanism is located on one side of the module battery; The second extrusion mechanism is located on the other side of the module battery; Multiple extrusion components are respectively installed at the ends of the first extrusion mechanism and the second extrusion mechanism. The first extrusion mechanism and the second extrusion mechanism drive some or all of the extrusion components to move closer to or away from the module battery to press or release the end plates at both ends of the module battery. During the installation process with the straps, the pressing components that interfere with the straps are kept away from the module battery, while the pressing components that do not interfere with the straps are kept close to the module battery.

2. The battery module strapping installation fixture according to claim 1, characterized in that, The first extrusion mechanism includes: The first fixed seat is installed on the tooling base; Multiple first-stroke sub-mechanisms are provided, with one end of each first-stroke sub-mechanism mounted on the first fixed base, and the other end of each first-stroke sub-mechanism serving as the end of the first extrusion mechanism for mounting the extrusion component.

3. The battery module strapping installation fixture according to claim 1, characterized in that, The second extrusion mechanism includes: The second fixed seat is installed on the tooling base; Multiple second-stroke sub-mechanisms are provided, with one end of each second-stroke sub-mechanism mounted on the second fixed base, and the other end of each second-stroke sub-mechanism serving as the end of the second extrusion mechanism for mounting the extrusion component.

4. The battery module strapping installation fixture according to claim 1, characterized in that, The first stroke submechanism is a telescopic structure.

5. The battery module strapping installation fixture according to claim 1, characterized in that, The second stroke submechanism is a telescopic structure.

6. The battery module strapping installation fixture according to claim 1, characterized in that, Also includes: The third extrusion mechanism is located above the module battery, and the extrusion component is installed at the end of the third extrusion mechanism.

7. The battery module strapping installation fixture according to claim 1, characterized in that, The squeezing component that interfered with the strap will reappear near the module battery after it has de-interfered with the strap.

8. The battery module strapping installation fixture according to claim 1, characterized in that, The extrusion component includes a pressure block.

9. The battery module strapping installation fixture according to claim 1, characterized in that, The straps include at least two.

10. A battery pack comprising at least one battery module, characterized in that, The battery module is installed using the battery module strapping installation fixture as described in any one of claims 1-9.

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