Battery constant pressure clamping device and method

Abstract

The present invention relates to a battery constant-pressure clamping device and method thereof. First, a pressure device is used to apply a force to a pressure plate to drive the pressure plate to move toward a first end plate. When a pressure-maintaining spring between the pressure plate and the pressure-applying plate is compressed, it pushes the pressure-applying plate to clamp the battery. Then, when the applied pressure reaches a predetermined value, the constant-pressure bolt is locked to maintain the pressure plate at the current position. Finally, the force applied by the pressure device is removed. Accordingly, the present invention can provide appropriate compression force through the pressure-maintaining spring, and also has a buffering effect, which can be used to absorb excessive and improper external thrust. In addition, the present invention utilizes a constant-pressure bolt to form a pressure-maintaining effect, that is, a fixed pressure-maintaining spring is used to form a constant-value compression force, thereby eliminating the necessary pressure mechanism or component in the existing battery clamping tray.

Description

Technical Field

[0001] The invention relates to a battery constant pressure clamping device and method thereof, in particular to a battery clamp used for clamping the battery and charging and discharging the battery during the formation process of a soft-pack lithium battery. Background Art

[0002] Before lithium batteries are manufactured into finished products, they must first undergo formation. The so-called "formation" is to apply electricity to the electrodes of the soft-pack lithium battery (semi-finished lithium battery) so that the chemical components of the soft-pack lithium battery, which were originally in a fluid state, gradually solidify to store electrical energy. To further explain, a pouch-type lithium battery refers to a pouch-type battery that has a fluid chemical component filled in a soft bag. Therefore, during the formation process, the pouch-type lithium battery will expand, so a uniform shaping force must be continuously applied to maintain its shape.

[0003] Furthermore, during the formation process, the battery needs a clamp to fix the battery, and the clamp usually needs to pressurize the battery to shape the battery. In the industry, the clamp is commonly known as a restraint tray. In the prior art, the pressurizing mechanism is part of the restraint tray, which is used to drive the partition in the restraint tray to pressurize the battery. However, generally speaking, the pressurizing mechanism is connected to the restraint tray; that is, a restraint tray must be equipped with a pressurizing mechanism, which is usually composed of a deceleration mechanism.

[0004] Take the Chinese invention patent publication No. CN 108666609 A "A clamping tray for lithium-ion soft-pack power batteries" as an example. The main technical feature of this patent is that a silicone sheet is set on the end surface of the clamping plate to buffer and prevent the battery from being over-pressurized and causing the battery to swell during formation. Although the driver (motor) of the pressurizing mechanism is not shown in the drawing, it must be equipped with a motor and a reduction mechanism connected to the screw of the pressurizing mechanism.

[0005] In addition, taking the Chinese invention patent publication No. CN 108666608 A "Lithium-ion soft-pack power battery clamping tray" as an example, the main purpose of this patent is the same as the previous one, which is to prevent the battery from being over-pressurized and causing the battery to swell during formation. The difference between the two is that this patent uses a spring as a buffer mechanism. However, similarly, although the driver (motor) of the pressurizing mechanism is not shown in the drawing, the motor and the speed reduction mechanism connected to the screw of the pressurizing mechanism seem to be indispensable in terms of the technical content disclosed in this patent.

[0006] Therefore, it can be seen that there is no need to configure a pressurizing mechanism or pressurizing device for each restraint pallet. All restraint pallets can share a pressurizing mechanism and can apply pressure outside a single machine line, thereby effectively reducing costs. This technology is what the industry and the general public are eagerly looking forward to. Summary of the invention

[0007] The main purpose of the present invention is to eliminate the necessary pressurizing mechanism or components in the clamping tray of the existing soft-pack lithium battery, and to transform the device into a single machine that can apply pressure off-line with a simple and reliable pressure-maintaining mechanism, thereby improving reliability and service life, and making the process more flexible and effectively reducing costs.

[0008] To achieve the above-mentioned purpose, the present invention provides a battery constant pressure clamping device for clamping at least one battery, the device mainly includes a frame, at least one spacer plate, a pressure plate, a pressure plate, at least one pressure-maintaining spring and at least one constant pressure bolt; the frame includes a first end plate, a second end plate and a plurality of guide rods, and the plurality of guide rods are respectively arranged between the first end plate and the second end plate, and the first end plate is provided with at least one through hole; at least one spacer plate is coupled to the plurality of guide rods, and at least one battery is fixed to at least one spacer plate; the pressure plate is coupled to the plurality of guide rods and can slide relatively, and the pressure plate is between the first end plate and at least one spacer plate; the pressure plate and the pressure plate are respectively arranged on two corresponding sides of the first end plate; at least one pressure-maintaining spring passes through at least one through hole of the first end plate and is located between the pressure plate and the pressure plate; at least one constant pressure bolt is locked between the pressure plate and the first end plate; wherein, when the pressure plate is subjected to an external thrust and pushes at least one pressure-maintaining spring, the supporting tension of at least one pressure-maintaining spring will drive at least one spacer plate to clamp at least one battery through the pressure plate.

[0009] Accordingly, the present invention uses a pressure-retaining spring to push the pressure plate and the spacer to clamp the battery and provide an appropriate compression force, and the pressure-retaining spring can also provide a buffering effect to absorb excessive and improper external thrust, and when the battery is over-swelled during the formation process, it can also provide a compressible margin to accommodate the battery expansion to avoid the battery bursting caused by a fixed compression amount. In addition, the present invention uses a fixed pressure bolt to form a pressure-retaining effect, that is, the distance between the pressure-bearing plate and the pressure plate (that is, the compression amount of the pressure-retaining spring) is fixed to form a fixed compression force, thereby eliminating the necessary pressure mechanism or component in the existing battery clamping tray.

[0010] Further explanation, the battery constant pressure clamping device of the present invention may further include at least one spring guide rod, which may pass through at least one through hole of the first end plate, and one end of which is connected to the pressure-applying plate and the other end of which is coupled to the pressure-bearing plate. At least one pressure-maintaining spring may be disposed on at least one spring guide rod, and the pressure-bearing plate may slide relative to at least one spring guide rod. In other words, the present invention may further provide a spring guide rod to guide the pressure-bearing plate and the pressure-maintaining spring so that they do not deflect or shift.

[0011] Preferably, the pressure plate of the battery constant-pressure clamping device of the present invention may be provided with at least one through hole, and the first end plate may be provided with at least one screw hole; wherein, at least one constant-pressure bolt may pass through at least one through hole and be locked in at least one screw hole. Accordingly, the present invention can fix the position of the pressure plate, that is, the feed amount of the pressure plate, by means of the constant-pressure bolts, thereby controlling the compression amount of the pressure-maintaining spring and determining the clamping force on the battery. On the other hand, the present invention can further adjust the locking amount of the constant-pressure bolt relative to the first end plate by means of the constant-pressure bolts, that is, further adjust the spacing between the pressure plate and the pressure-applying plate, that is, the compression amount of the pressure-maintaining spring, thereby manually adjusting the clamping force on the battery.

[0012] On the other hand, the multiple guide rods of the battery constant pressure clamping device of the present invention may include a pair of upper guide rods and a pair of lower guide rods, which are respectively arranged at the four corners of the first end plate and the second end plate; and at least one spacer plate may be hooked on one of the pair of upper guide rods on one side, and may be pressed against one of the pair of lower guide rods on the other side. In other words, the spacer plate of the present invention can be coupled to the guide rod only through two fixing points, so when there is a need for a change, the spacer plate can be quickly replaced or increased or decreased by simply lifting the spacer plate, and the battery constant pressure clamping device can also be quickly maintained or modified.

[0013] Furthermore, the first end plate of the battery constant pressure clamping device of the present invention may also include a protrusion, which may be located on an end surface of the first end plate and protrude toward the pressure plate, and can be used to stop the pressure plate to prevent the pressure plate from being too close to the first end plate and hitting the first end plate when the external thrust is canceled. In addition, the present invention may also include a first fixing plate and a second fixing plate, the first fixing plate may be connected to the pressure plate and located between the pressure plate and at least one spacer plate; and the second fixing plate may be connected to the second end plate and located between the second end plate and at least one spacer plate. The first fixing plate and the second fixing plate may also be used to load batteries.

[0014] In order to achieve the aforementioned objectives, the present invention provides a battery constant pressure clamping device for clamping at least one battery, and the device mainly includes a frame, at least one spacer plate, a pressure plate, a pressure-bearing plate, at least one pressure-maintaining spring, at least one constant pressure bolt, and at least one spring guide rod. The frame includes a first end plate, a second end plate, and a plurality of guide rods, and the plurality of guide rods are respectively arranged between the first end plate and the second end plate, and the first end plate is provided with at least one through hole; at least one spacer plate is coupled to the plurality of guide rods, and at least one battery is fixed to at least one spacer plate; the pressure plate is coupled to the plurality of guide rods and can slide relatively, and the pressure plate is between the first end plate and at least one spacer plate; the pressure-bearing plate and the pressure plate are respectively arranged on two corresponding sides of the first end plate, and the pressure-bearing plate is provided with at least one through guide hole; at least one pressure-maintaining spring passes through at least one through hole of the first end plate. , and is located between the pressure plate and the pressure-applying plate; one end of at least one fixed pressure bolt passes through the pressure plate, and the other end is locked to the first end plate; at least one spring guide rod passes through at least one through hole of the first end plate, and one end is connected to the pressure-applying plate, and the other end is coupled to at least one through guide hole of the pressure plate, and the pressure plate can slide relative to the at least one spring guide rod; wherein, when the pressure plate is pushed by an external thrust and pushes at least one pressure-maintaining spring, the supporting tension of the at least one pressure-maintaining spring will drive at least one spacer to clamp at least one battery through the pressure-applying plate, and at least one fixed pressure bolt keeps the pressure plate at its current position.

[0015] In addition, to achieve the aforementioned purpose, a battery constant-pressure clamping method of the present invention uses the battery constant-pressure clamping device as described above, and the method includes: first, a pressure-applying device applies a force to a pressure plate to drive the pressure plate to move toward the first end plate; and at least one pressure-maintaining spring is compressed and then pushes the pressure plate to clamp at least one battery; then, when the force applied by the pressure-applying device reaches a predetermined value, at least one constant-pressure bolt is locked to maintain the pressure plate at the current position; finally, the force applied by the pressure-applying device is removed. Accordingly, the battery constant-pressure clamping device of the present invention does not need to be equipped with a pressure-applying device. After the pressure is completed, the current pressure is maintained by the constant-pressure bolts. That is, after the pressure is maintained, the pressure-applying device can be directly removed to achieve single-machine off-line pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a stereoscopic diagram of a preferred embodiment of the battery constant pressure clamping device of the present invention.

[0017] Figure 2 It is a three-dimensional diagram of the battery constant pressure clamping device of the present invention with the partition plate removed.

[0018] Figure 3 It is an exploded view of a preferred embodiment of the battery constant pressure clamping device of the present invention.

[0019] Figure 4It is a cross-sectional view of a preferred embodiment of the present invention, which shows a state where a partition plate is mounted on a guide rod.

[0020] Figure 5A It is a side view of the battery constant pressure clamping device of the present invention before pressurization.

[0021] Figure 5B It is a side view of the battery constant pressure clamping device of the present invention after being pressurized. DETAILED DESCRIPTION

[0022] Before the battery constant pressure clamping device and method of the present invention are described in detail in this embodiment, it should be noted that similar components will be represented by the same component symbols in the following description. Furthermore, the drawings of the present invention are only for schematic illustration, which may not be drawn to scale, and not all details may be presented in the drawings.

[0023] Please read first Figure 1 , Figure 2 and Figure 3 , Figure 1 is a stereoscopic diagram of a preferred embodiment of the battery constant pressure clamping device of the present invention, Figure 2 This is a three-dimensional diagram of the battery constant pressure clamping device of the present invention after removing the partition plate. Figure 3 1 is an exploded view of a preferred embodiment of the battery constant pressure clamping device of the present invention. As shown in the figure, the battery constant pressure clamping device of this embodiment mainly includes a frame 2, a plurality of spacer plates 3, a pressure plate 4, a pressure plate 5, four pressure-maintaining springs 6, four spring guide rods 61 and two constant pressure bolts 7.

[0024] The frame 2 is composed of a first end plate 21, a second end plate 22 and four guide rods 23, and the four guide rods 23 include a pair of upper guide rods 231 and a pair of lower guide rods 232, which are respectively arranged at the four corners of the first end plate 21 and the second end plate 22. In addition, the first end plate 21 is provided with four through holes 211 and two screw holes 212. In addition, the first end plate 21 also includes a boss 213 (see Figure 2 ), which is located at one end surface of the first end plate 21 and protrudes toward the pressure plate 4. In this embodiment, the function of the boss 213 is to stop the pressure plate 4, especially when the number of the spacer plates 3 is large, the boss 213 can prevent the pressure plate 4 from being too close to the first end plate 21, and the pressure plate 4 from hitting the first end plate 21 when the external thrust is canceled.

[0025] Furthermore, a plurality of spacers 3 are mounted on the guide rod 23. The spacers 3 are used to carry batteries (not shown in the figure), and usually one battery is fixed on each side. Figure 4 , Figure 4: is a cross-sectional view of a preferred embodiment of the present invention, which shows the state of the partition plate 31 being mounted on the guide rod 23. As shown in the figure, the partition plate 31 of this embodiment includes a body 33, an upper cantilever portion 34 and a lower cantilever portion 35, and the upper cantilever portion 34 and the lower cantilever portion 35 protrude from the end surfaces of both sides of the body 33, respectively, and are arranged diagonally. Among them, the lower end surface of the upper cantilever portion 34 includes a V-shaped slide groove 341, which is used to hang on the upper guide rod 231; and the lower cantilever portion 35 uses its lower end surface to abut against the lower guide rod 232.

[0026] As can be seen from the above, the partition plate 3 of this embodiment is only supported by the upper cantilever part 34 and the lower cantilever part 35 and is mounted on the guide rod 23. It has few contact points, low friction, and is easy to slide. Most importantly, it is very convenient to take and put, and only needs to be easily lifted up. In other words, when there is a need to change the type, the partition plate 3 can be quickly replaced or increased or decreased by simply lifting it up, and the battery constant pressure clamping device can also be quickly maintained or modified. On the other hand, the V-shaped slide groove 341 provides a positioning effect, which can prevent the partition plate 3 from sliding left and right.

[0027] Also, please refer to Figure 1 , Figure 2 and Figure 3 In this embodiment, the pressure plate 4 is disposed on the four guide rods 23 through the through guide holes 41 at the four corners thereof, and can slide relatively, and the pressure plate 4 is disposed between the first end plate 21 and the plurality of spacer plates 3. Moreover, the pressure plate 4 includes a first end surface 42 and a second end surface 43, wherein the first end surface 42 includes four circular grooves 421, and the second end surface 43 is connected to the first fixing plate 31, and the second fixing plate 32 is further connected to the second end plate 22; that is, the plurality of spacer plates 3 are disposed between the first fixing plate 31 and the second fixing plate 32. Moreover, the end surfaces of the first fixing plate 31 and the second fixing plate 32 facing the spacer plate 3 can each carry a battery (not shown in the figure).

[0028] Furthermore, the pressure plate 5 and the pressure applying plate 4 as shown in the figure are respectively arranged on two corresponding sides of the first end plate 21, that is, at the outermost side of the device, and a through guide hole 52 is respectively arranged at the four corners of the pressure plate 5. In addition, two through holes 51 are respectively arranged at the two side ends of the pressure plate 5, that is, a through hole 51 is inserted between the two through guide holes 52 on the left and right sides.

[0029] In addition, the four pressure-retaining springs 6 of the present embodiment respectively pass through the four through holes 211 of the first end plate 21, and the two ends of each pressure-retaining spring 6 are respectively pressed against the pressure-bearing plate 5 and the pressure-applying plate 4, and the end pressed against the pressure-applying plate 4 is accommodated in the circular groove 421, so as to position the pressure-retaining spring 6 so as not to shift.

[0030] In addition, the four spring guide rods 61 shown in the figure also pass through the four through holes 211 of the first end plate 21 respectively, and each spring guide rod 61 includes a head end 611 and a tail end 612, wherein the tail end 612 is fixedly connected to the center of the circular groove 421 of the pressure plate 4, and the head end 611 passes through the through guide hole 52 of the pressure plate 5. In addition, the four pressure-maintaining springs 6 are respectively arranged on the four spring guide rods 61, so the spring guide rods 61 can shape the pressure-maintaining springs 6 to avoid deformation.

[0031] In addition, in the present embodiment, each fixed pressure bolt 7 includes a threaded section 71 and a locking head section 72, wherein the threaded section 71 is screwed into the screw hole 212 of the first end plate 21, and the locking head section 72 is clamped into the through hole 51 of the pressure plate 5. In other words, when the fixed pressure bolt 7 is rotated, the distance between the pressure plate 5 and the first end plate 21 can be fixed, that is, the compression amount of the pressure-maintaining spring 6 can be fixed to maintain the tensioning elastic force of the pressure-maintaining spring 6.

[0032] The following is a description of the operation method of the battery constant pressure clamping device of this embodiment. Figure 1 , Figure 5A and Figure 5B , Figure 5A is a side view of the battery constant pressure clamping device of the present invention before pressurization, Figure 5B First, a force F is applied to the pressure plate 5 by a pressure device P. In this embodiment, the pressure device P can be a pneumatic cylinder, a hydraulic cylinder, a linear motor, a pressure mechanism composed of a motor and a screw, or other equivalent devices or components that can pressurize the pressure plate 5 to move toward the first end plate 21.

[0033] At this time, the pressure plate 5 is affected by the thrust force F and slides toward the first end plate 21 relative to the spring guide rod 61 and the fixed pressure bolt 7; that is, only the pressure plate 5 slides, while the spring guide rod 61, the fixed pressure bolt 7 and the first end plate 21 are all fixed. At this time, the pressure-retaining spring 6 is compressed due to the sliding of the pressure plate 5, so the force F is indirectly transmitted to the pressure plate 4 through the pressure-retaining spring 6. In this regard, in addition to transmitting the force, the pressure-retaining spring 6 also plays a buffering role, which can absorb excessive or unstable force.

[0034] Next, when the pressure plate 4 is subjected to the force F, it pushes the spacer plate 3, so that the pressure plate 4 and the spacer plate 3 move toward the second end plate 22 to apply pressure to clamp the battery on the spacer plate 3. In addition, in this embodiment, a pressure sensing unit (not shown) is provided between the pressure device P and the pressure plate 5, so that the force F applied by the pressure device P will be continuously monitored during the entire pressure process.

[0035] However, when the force F reaches a predetermined value, the pressure is stopped and the fixed pressure bolt 7 is rotated to lock the fixed pressure bolt 7 in the screw hole 212 of the first end plate 21 until the locking head section 72 of the fixed pressure bolt 7 abuts against the pressure plate 5. Figure 5B As shown; the purpose of this action is to maintain the pressure plate 5 at the current position, that is, to fix the distance between the pressure plate 5 and the first end plate 21, and also to maintain a constant clamping force on the battery on the partition plate 3 through the pressure-maintaining spring 6, which is equivalent to the force F applied by the pressure-applying device P.

[0036] In other words, in this embodiment, the pressure-retaining spring 6 is used to push the pressure-applying plate 5 and the spacer plate 3, that is, the pressure-retaining spring 6 with stored pressure is used to clamp the battery and provide appropriate compression force to shape the battery. Moreover, the pressure-retaining spring 6 can also provide a buffering effect to absorb excessive and improper external thrust, such as instantaneous excessive force. In addition, when the battery is over-swelled during the formation process, a spring compression margin can also be provided to accommodate the battery expansion to avoid battery explosion due to quantitative compression.

[0037] Finally, the force F applied by the pressurizing device P can be removed, that is, the battery constant pressure clamping device can be separated from the pressurizing device P, and then the formation operation can be performed. It can be seen that the battery constant pressure clamping device of this embodiment does not need to be equipped with a pressurizing device, and can be pressed off-line by a single machine, that is, the entire production line only needs to be equipped with a single pressurizing device P, and when the battery constant pressure clamping device completes the above steps, it is the turn of the next battery constant pressure clamping device to perform pressurization, so the overall structure of the device is significantly simplified, and the reliability and service life can be greatly improved, and the cost can be significantly reduced.

[0038] The above embodiments are merely examples for the convenience of description. The scope of rights claimed by the present invention should be based on the scope of the claims, but not limited to the above embodiments.

[0039] Description of Reference Numerals

[0040] 2: Framework

[0041] 3: Partition board

[0042] 4: Pressure plate

[0043] 5: Pressure plate

[0044] 6: Pressure retaining spring

[0045] 7: Constant pressure bolt

[0046] 21: First end plate

[0047] 22: Second end plate

[0048] 23: Guide rod

[0049] 31: First fixing plate

[0050] 32: Second fixing plate

[0051] 33:Ontology

[0052] 34: Upper cantilever

[0053] 35: Lower cantilever

[0054] 41: Through-hole

[0055] 42: First end surface

[0056] 43: Second end surface

[0057] 51:Through hole

[0058] 52:Through-hole

[0059] 61: Spring guide rod

[0060] 71: Thread segment

[0061] 72: Lock header

[0062] 211:Through hole

[0063] 212: screw hole

[0064] 213: Boss

[0065] 231: Upper guide rod

[0066] 232: Lower guide rod

[0067] 421: Circular groove

[0068] 611: Headend

[0069] 612: Tail end

[0070] F: external thrust

[0071] P: Pressurizing device.

Claims

1. A battery constant pressure clamping device for clamping at least one battery, the device comprising: A frame, comprising a first end plate, a second end plate and a plurality of guide rods, wherein the plurality of guide rods are respectively arranged between the first end plate and the second end plate, and the first end plate is provided with at least one through hole; at least one spacer plate coupled to the plurality of guide rods, the at least one battery being fixed to the at least one spacer plate; A pressure plate coupled to the plurality of guide rods and capable of relatively sliding, the pressure plate being interposed between the first end plate and the at least one spacer plate; A pressure-bearing plate, which and the pressure-applying plate are respectively arranged on two corresponding sides of the first end plate; at least one pressure-retaining spring, which passes through the at least one through hole of the first end plate and is located between the pressure-bearing plate and the pressure-applying plate; and At least one constant pressure bolt, which is locked between the pressure plate and the first end plate; When the pressure-bearing plate is subjected to an external thrust and pushes the at least one pressure-maintaining spring, the tension of the at least one pressure-maintaining spring drives the at least one spacer plate to clamp the at least one battery through the pressure-applying plate.

2. The battery constant pressure clamping device according to claim 1 further comprises at least one spring guide rod, which passes through the at least one through hole of the first end plate, and one end is connected to the pressure plate, and the other end is coupled to the pressure plate, and the at least one pressure-maintaining spring is arranged on the at least one spring guide rod, and the pressure plate can slide relative to the at least one spring guide rod.

3. The battery constant pressure clamping device according to claim 1, wherein: The pressure-bearing plate is provided with at least one through hole, and the first end plate is provided with at least one screw hole; the at least one fixed pressure bolt passes through the at least one through hole and is locked in the at least one screw hole.

4. The battery constant pressure clamping device according to claim 1, wherein: The plurality of guide rods include a pair of upper guide rods and a pair of lower guide rods, which are respectively arranged at the four corners of the first end plate and the second end plate; one side of the at least one partition plate is hung on one of the pair of upper guide rods, and the other side is pressed against one of the pair of lower guide rods.

5. The battery constant pressure clamping device according to claim 1, wherein: The first end plate also includes a protruding column, which is located on an end surface of the first end plate and protrudes toward the pressure plate.

6. The battery constant pressure clamping device according to claim 1 further comprises a first fixing plate and a second fixing plate, wherein the first fixing plate is connected to the pressure plate and is located between the pressure plate and the at least one spacer plate; the second fixing plate is connected to the second end plate and is located between the second end plate and the at least one spacer plate.

7. A battery constant pressure clamping device for clamping at least one battery, the device comprising: A frame, comprising a first end plate, a second end plate and a plurality of guide rods, wherein the plurality of guide rods are respectively arranged between the first end plate and the second end plate, and the first end plate is provided with at least one through hole; at least one spacer plate coupled to the plurality of guide rods, the at least one battery being fixed to the at least one spacer plate; A pressure plate coupled to the plurality of guide rods and capable of relatively sliding, the pressure plate being interposed between the first end plate and the at least one spacer plate; A pressure-bearing plate, which and the pressure-applying plate are respectively arranged on two corresponding sides of the first end plate, and the pressure-bearing plate is provided with at least one through guide hole; At least one pressure-retaining spring, which passes through the at least one through hole of the first end plate and is located between the pressure-bearing plate and the pressure-applying plate; at least one constant pressure bolt, one end of which passes through the pressure-bearing plate and the other end of which is locked to the first end plate; and At least one spring guide rod passes through the at least one through hole of the first end plate, one end of which is connected to the pressure-applying plate, and the other end of which is coupled to the at least one through guide hole of the pressure-bearing plate, the at least one pressure-retaining spring is disposed on the at least one spring guide rod, and the pressure-bearing plate can slide relative to the at least one spring guide rod; When the pressure plate is subjected to external thrust and pushes the at least one pressure-maintaining spring, the supporting tension of the at least one pressure-maintaining spring will drive the at least one spacer plate to clamp the at least one battery through the pressure plate, and the at least one constant pressure bolt keeps the pressure plate at the current position.

8. The battery constant pressure clamping device according to claim 7, wherein: The pressure-bearing plate is provided with at least one through hole, and the first end plate is provided with at least one screw hole; the at least one fixed pressure bolt passes through the at least one through hole and is locked in the at least one screw hole.

9. The battery constant pressure clamping device according to claim 7, wherein: The plurality of guide rods include a pair of upper guide rods and a pair of lower guide rods, which are respectively arranged at the four corners of the first end plate and the second end plate; one side of the at least one partition plate is hung on one of the pair of upper guide rods, and the other side is pressed against one of the pair of lower guide rods.

10. A battery constant pressure clamping method, using the battery constant pressure clamping device according to any one of claims 1 to 9, the method comprising: (A) a pressure device applies a force to the pressure plate to drive the pressure plate to move toward the first end plate; The at least one pressure-maintaining spring is compressed and pushes the pressure plate to clamp the at least one battery; (B) when the force applied by the pressure device reaches a predetermined value, locking the at least one constant pressure bolt so that the pressure plate is maintained at a current position; as well as (C) removing the force applied by the pressurizing device.

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