Battery pack with square battery cell fixing device and automobile

Abstract

The invention relates to the technical field of automobile power batteries, and discloses a battery pack with a square battery cell fixing device and an automobile, the battery pack comprises a battery box body bottom wall, a battery box body side wall and a battery cell lateral limiting and pressing device arranged on the battery box body side wall; the battery box body side wall is arranged on the upper end face of the battery box body bottom wall, and the battery box body bottom wall and the battery box body side wall form a box body with an opening in the upper end; at least one of the two opposite battery box body side walls is sleeved with a plurality of battery cell lateral limiting and pressing devices in a front-back telescopic manner, and the battery box body side wall provided with the battery cell lateral limiting and pressing devices is provided with at least one battery cell lateral limiting and pressing device corresponding to each battery cell of the battery cell group; compared with the prior art, the battery cell module does not need to be clamped and pressed by larger force when being put into a box, the battery cell module can be easily put into a battery pack, the battery cell module is fixed by the clamping device after being put into the box, the clamping force of the battery cell module is increased by the device, and the fixing degree of the battery cell module on the battery pack is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive power batteries, and in particular to a battery pack with a fixed square battery cell device and an automobile. Background Art

[0002] The typical structure of a prismatic battery pack for electric vehicles is as follows: In actual production, after assembling a prismatic battery pack, the battery cell group needs to be assembled into the battery pack. The assembly process is usually divided into the following steps: Step 1: Grab the uncompressed battery cell group; Step 2: Overpressurize the battery cell group before it is boxed; Step 3: After the battery cell group is boxed, it expands slightly due to pressure.

[0003] This process often encounters many problems. Since it is impossible for all battery cells to be completely uniform, the expansion of the battery cell group after each extrusion is different; sometimes after expansion, the battery cell group still does not completely contact the crossbeams and longitudinal beams of the battery pack box. When the battery cell group is placed in the box, although there is glue on the bottom, there is still a certain gap between the battery cell group and the cross and longitudinal beams. With the charging and discharging of the power battery, the accelerated aging of the glue on the bottom may cause the square battery to be unable to be fixed, shaking, or even battery system failure and fire risk; if the extrusion force is too large during the assembly of the battery cell group, the battery cell may be easily crushed; in actual production, the extrusion force of the battery cell each time is very difficult to control; after the battery cell group is placed in the box, if the expansion force is too large, the crossbeams and longitudinal beams of the battery pack will also be damaged. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a battery pack with a device for fixing square battery cells. A clamping device is added to the side wall on the basis of the original ordinary battery pack. When the battery cell module is placed in the box, it is no longer necessary to clamp and press it with great force. The battery cell group can be easily placed in the battery pack. After the battery cell group is placed in the box, the battery cell group is fixed by the clamping device. This device increases the clamping force of the battery cell group and increases the degree of fixation of the battery cell group on the battery pack.

[0005] The present invention proposes a battery pack with a fixed square battery cell device, comprising a battery box bottom wall, a battery box side wall and a battery cell lateral limiting and pressing device arranged on the battery box side wall; the battery box side wall is arranged on the upper end surface of the battery box bottom wall, and the battery box bottom wall and the battery box side wall constitute a box body with an upper end opening; at least one of the two opposite battery box side walls is provided with a plurality of battery cell lateral limiting and pressing devices telescopically sleeved on the battery box side wall, and the battery box side wall provided with the battery cell lateral limiting and pressing device is provided with at least one battery cell lateral limiting device corresponding to each battery cell of the battery cell group Clamping device; If only one group of battery cells is seated with gap matching in the battery box, the battery cell lateral limiting and clamping device can be set on one side wall of a pair of side walls opposite to each other in the X and Y directions, so as to ensure that at least one side wall in the X and Y directions is provided with a plurality of battery cell lateral limiting and clamping devices, and ensure that the battery cell group seated in the battery box has a limiting device for each battery cell side end in the X and Y directions. It is better to provide battery cell lateral limiting and clamping devices on both opposite side walls, so as to avoid the situation that the side end of each battery cell in the battery cell group will not be firmly limited by the limiting device when there is a processing tolerance in the size of the battery cell. The battery cell group limiting device is arranged on the side wall of the battery box. When the battery cell group is freely placed in the battery box, the battery cell group will only be limited and fixed by manually adjusting the lateral limiting and clamping device of each battery cell to the side end of the battery cell. The applied lateral thrust will not press the battery cell group into the battery box vertically through mechanical overpressure as described in the prior art, avoiding the situation where the battery cell is excessively expanded or even damaged due to mechanical overpressure of the battery cell group; the battery cell lateral limiting and clamping device includes a clamping telescopic rod, a telescopic rod limiting sleeve and a battery cell limiting and clamping plate, the telescopic rod limiting sleeve is passed and fixed on the side wall of the battery box, and the clamping telescopic rod telescopic sleeve It is connected to the telescopic rod limiting sleeve, and the front end of the compression telescopic rod is exposed in the side wall of the battery box, and the front end of the compression telescopic rod is connected to the battery cell limiting and clamping plate. The front end of the battery cell limiting and clamping plate can be in limited contact with the side end face of the battery cell. This structure allows the battery cell group and the side wall of the battery box to retain two-sided (there are four or more battery cell groups arranged in a field shape in the battery pack) or four-sided gaps (there is only one battery cell group in the battery pack) in addition to the battery cell side limiting and clamping device that limits the battery cell laterally. This enhances the heat dissipation effect of the battery cell group, and the two-sided or four-sided gaps also serve to isolate heat from radiating to the side.

[0006] The compression telescopic rod includes an adjusting knob with anti-slip grooves, a threaded rod, and a connecting rod. The front and rear ends of the threaded rod are fixedly connected to the connecting rod and the adjusting knob respectively; the telescopic rod limiting sleeve includes a tubular body, the inner wall of the tubular body is provided with a thread, the threaded rod is matched with the threaded thread of the inner wall of the tubular body, the battery cell limiting and pressing plate includes a limiting pressure block and a rubber sleeve, a blind hole is provided on the limiting pressure block, the rubber sleeve is matched and embedded in the blind hole, and the connecting rod is matched and embedded in the rubber sleeve; when the adjusting knob is turned, the threaded rod rotates and extends forward along the thread of the telescopic rod limiting sleeve, driving the limiting pressure block to move forward The battery is then pushed forward and the end face of the limit pressure block contacts the corresponding side end of the battery cell, pushing the battery cell until both side ends of the battery cell are limited and fixed. Since the connecting rod is rotatably connected to the limit pressure block through the rubber sleeve, part of the rotational force applied by the hand on the adjustment knob is reduced by the rubber sleeve, and the excessive pressure applied by the hand will not be fully transmitted to the limit pressure block. When the hand feels the rebound force, it knows that the side limit clamping device of the battery cell is adjusted into place and no more rotational force is required. This will not cause the side wall of the battery cell to be subjected to excessive pressure, resulting in expansion and deformation, thereby avoiding the safety risks caused by battery cell deformation.

[0007] The compression telescopic rod comprises an adjusting knob with anti-slip grooves, a threaded rod, and a connecting rod, and the front and rear ends of the threaded rod are fixedly connected to the connecting rod and the adjusting knob respectively; the telescopic rod limiting sleeve comprises a tubular body, the inner wall of the tubular body is provided with a thread, the threaded rod is matched with the thread of the inner wall of the tubular body, the battery cell limiting and pressing plate comprises a limiting pressure block and a bearing, a blind hole is provided on the limiting pressure block, the outer ring of the bearing is matched and embedded in the blind hole, and the connecting rod is matched and embedded and fixed to the inner ring of the bearing; when the adjusting knob is turned, the threaded rod rotates and extends forward along the thread of the telescopic rod limiting sleeve, driving the limiting pressure block The block rotates forward synchronously. When the end face of the limiting pressure block contacts the corresponding side end of the battery cell, the battery cell is pushed until the two side ends of the battery cell are limited and fixed. Since the connecting rod is rotatably connected to the limiting pressure block through the bearing, the bearing limits the forward direction of the connecting rod. When the battery cell lateral limiting and clamping device is adjusted into place, the human hand will feel that the rotational forward movement of the threaded rod is blocked, and it knows that the battery cell lateral limiting and clamping device is adjusted into place, and there is no need to continue to apply rotational force, which will not cause the side wall of the battery cell to be subjected to excessive pressure, resulting in expansion and deformation, thereby avoiding the safety risks caused by battery cell deformation.

[0008] The compression telescopic rod includes an adjusting knob with anti-slip grooves, a connecting rod, a positioning cylinder and a positioning pin. The front and rear ends of the positioning cylinder are fixedly connected to the connecting rod and the adjusting knob respectively. A plurality of positioning blind holes are distributed on the circumferential side wall of the positioning cylinder, and the plurality of positioning blind holes are equidistantly arranged in the form of a spiral on the circumferential side wall of the positioning cylinder; the telescopic rod limiting sleeve includes a tubular body, the side wall of the tubular body is provided with a positioning through hole, the positioning cylinder is slidably sleeved in the tubular body, and the positioning pin is inserted into a positioning blind hole of the positioning cylinder through the positioning through hole of the tubular body. The battery cell limiting and clamping plate includes a limiting pressure block and a rubber sleeve, a blind hole is provided on the limiting pressure block, the rubber sleeve is matched and embedded in the blind hole, and the connecting rod is matched and embedded in the rubber sleeve; push the adjusting knob forward, the positioning cylinder slides forward along the limiting sleeve of the telescopic rod, driving the limiting pressure block When the hand feels the rebound force, it knows that the side limit pressing device of the battery cell is adjusted into place and no more thrust is required, which will not cause the side wall of the battery cell to be subjected to excessive pressure and cause expansion and deformation, thereby avoiding the safety risk caused by the deformation of the battery cell; at this time, the positioning pin is inserted into the positioning through hole of the tubular body, and the adjusting knob is rotated at the same time, and the connecting rod rotates in place in the rubber sleeve. When a positioning blind hole of the positioning cylinder is opposite to the positioning through hole, the positioning pin is inserted into the positioning blind hole to position and fix the side limit pressing device of the battery cell.

[0009] Two battery cell lateral limiting and clamping devices are arranged above and below each battery cell in the battery cell group on the side wall of the battery box. The two battery cell lateral limiting and clamping devices arranged above and below are synchronously connected by a first transmission belt with internal teeth. The first transmission belt is respectively engaged with the circumferential side walls of the adjustment knobs with anti-slip grooves of the two battery cell lateral limiting and clamping devices, so that the lower battery cell lateral limiting and clamping device can be quickly adjusted to quickly contact the same battery cell side wall by adjusting the upper battery cell lateral limiting and clamping device.

[0010] The two adjacent battery cell lateral limiting and clamping devices on the same horizontal plane corresponding to the two left and right adjacent battery cell positions in the battery cell group on the side walls of the battery box are connected horizontally and synchronously by a second transmission belt with internal teeth. The second transmission belt is respectively engaged with the circumferential side walls of the adjustment knobs with anti-slip grooves of the two horizontally adjacent battery cell lateral limiting and clamping devices, so that the other battery cell lateral limiting and clamping device can be quickly adjusted to quickly contact the two adjacent battery cell side walls by adjusting the adjacent battery cell lateral limiting and clamping device on the same horizontal plane to complete the rapid adjustment. If the two adjacent battery cells have slightly different sizes due to processing tolerances, the second transmission belt can be removed and fine-tuned to accurately fix and limit the battery cells.

[0011] The side walls of the battery case include an inner wall of the battery case and an outer wall of the battery case, and the inner wall of the battery case and the outer wall of the battery case are respectively arranged on the upper end surface of the bottom wall of the battery case, and the inner wall of the battery case and the outer wall of the battery case are arranged on the bottom wall of the battery case to form a U-shaped structure. The side limiting and clamping device of the battery cell is telescopically sleeved on the inner wall of the battery case, and the battery cell limiting and clamping plate of the side limiting and clamping device of the battery cell is accommodated in the space surrounded by the inner wall of the battery case, and the adjustment knob with anti-slip grooves of the side limiting and clamping device of the battery cell is accommodated in the space surrounded by the inner wall of the battery case and the outer wall of the battery case; the outer walls of the battery case adjacent to each other and each outer wall of the battery case and the bottom wall of the battery case are all detachably fixedly connected, which structure facilitates the operation of the side limiting and clamping device of the battery cell when assembling the battery pack.

[0012] The inner side walls of the battery box adjacent to each other at each corner position have connecting surfaces extending outward, and each connecting surface is fixedly connected to the corresponding outer side wall of the battery box. The four inner side walls of the battery box and the eight connecting surfaces form a criss-cross structure, and the four inner side walls of the battery box, the eight connecting surfaces and the four outer side walls of the battery box together form a criss-cross frame structure. The connecting surfaces support and reinforce the connected inner side walls of the battery box and the outer side walls of the battery box. The gap between the inner side walls of the battery box and the outer side walls of the battery box further increases the heat dissipation effect of the battery cell group. The gap between the inner side walls of the battery box and the outer side walls of the battery box further serves to isolate heat from radiating to the outside of the battery pack.

[0013] A multi-cell group thermal insulation baffle in a cross structure or a tic-tac-toe structure is also fixedly installed in the rectangular space enclosed by the inner wall of the battery box. The outer end of each vertical surface of the multi-cell group thermal insulation baffle is fixedly connected to the corresponding inner wall of the battery box and the outer wall of the battery box. The setting of the multi-cell group thermal insulation baffle plays a role in thermal insulation and insulation between two adjacent battery groups when four or more battery groups are accommodated in a battery pack, and at the same time enhances the impact strength of the side wall of the battery pack.

[0014] An automobile comprises an engine compartment and also comprises a battery pack with a fixed square battery cell device, wherein the battery pack with a fixed square battery cell device is arranged in the engine compartment.

[0015] Beneficial effects

[0016] The present invention adds a clamping device on the side wall on the basis of the original ordinary battery pack. When the battery cell module is placed in the box, it is no longer necessary to clamp and press it with great force. The battery cell group can be easily placed in the battery pack. After the battery cell group is placed in the box, the battery cell group is fixed by the clamping device. The device increases the clamping force of the battery cell group and increases the degree of fixation of the battery cell group on the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention.

[0018] Figure 2 It is a schematic diagram of the partial structure of a battery cell lateral limiting and pressing device according to an embodiment of the present invention.

[0019] Figure 3 It is a schematic diagram of the partial exploded structure of a battery cell lateral limiting and clamping device according to an embodiment of the present invention.

[0020] Figure 4 It is a schematic diagram of the overall structure of another embodiment of the present invention.

[0021] Figure 5 It is a partial structural diagram of the battery cell lateral limiting and pressing device according to the second embodiment of the present invention.

[0022] Figure 6 It is a schematic diagram of the partial exploded structure of the battery cell lateral limiting and pressing device according to the second embodiment of the present invention.

[0023] Figure 7 It is a partial structural diagram of the battery cell lateral limiting and pressing device according to the third embodiment of the present invention.

[0024] Figure 8 It is a schematic diagram of the partial exploded structure of the battery cell lateral limiting and pressing device according to the third embodiment of the present invention.

[0025] Figure 9 It is a schematic diagram of the exploded structure of the inner wall of the battery box and the battery cell lateral limiting and pressing device according to the third embodiment of the present invention.

[0026] In the picture:

[0027] 1. Bottom wall of battery box;

[0028] 2. Battery box side wall; 21. Battery box inner wall; 211. Joint surface; 212. Multi-cell group heat insulation baffle; 22. Battery box outer wall;

[0029] 3. Cell lateral limit and clamping device; 31. Clamping telescopic rod; 311. Adjustment knob with anti-slip grooves; 312. Threaded rod; 313. Connecting smooth rod; 314. Positioning cylinder; 315. Positioning pin; 316. Positioning blind hole; 32. Telescopic rod limit sleeve; 321. Tubular body; 322. Thread; 323. Positioning through hole; 33. Cell limit and clamping plate; 331. Limiting block; 332. Rubber sleeve; 333. Blind hole; 334. Bearing;

[0030] 4. First transmission belt;

[0031] 5. Second transmission belt. DETAILED DESCRIPTION

[0032] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the drawings only show portions relevant to the present invention, not all of them.

[0033] In the description of the present invention, it should be noted that the terms "center," "up," "down," "left," "right," "vertical," "horizontal," "inside," and "outside" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0034] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed or detachable connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention.

[0035] Example 1

[0036] See also Figure 1-Figure 3As shown, a battery pack with a fixed square battery cell device includes a battery box bottom wall 1, a battery box side wall 2 and a battery cell lateral limiting and pressing device 3 arranged on the battery box side wall 2; the battery box side wall 2 is arranged on the upper end surface of the battery box bottom wall 1, and the battery box bottom wall 1 and the battery box side wall 2 constitute a box body with an upper end opening; forty battery cell lateral limiting and pressing devices 3 are telescopically sleeved on the four battery box side walls 2, and the battery box side wall 2 provided with the battery cell lateral limiting and pressing device 3 corresponds to each battery cell group The battery cell is provided with two battery cell lateral limiting and clamping devices 3; the battery cell lateral limiting and clamping device 3 includes a clamping telescopic rod 31, a telescopic rod limiting sleeve 32 and a battery cell limiting and clamping plate 33, the telescopic rod limiting sleeve 32 is passed through and fixed on the side wall 2 of the battery box, the clamping telescopic rod 31 can be telescopically sleeved in the telescopic rod limiting sleeve 32, and the front end of the clamping telescopic rod 31 is exposed in the side wall 2 of the battery box, the front end of the clamping telescopic rod 31 is connected to the battery cell limiting and clamping plate 33, and the front end of the battery cell limiting and clamping plate 33 can be in limited contact with the side end face of the battery cell.

[0037] The compression telescopic rod 31 includes an adjustment knob 311 with anti-slip grooves, a threaded rod 312, and a connecting rod 313. The front and rear ends of the threaded rod 312 are fixedly connected to the connecting rod 313 and the adjustment knob 311 respectively; the telescopic rod limiting sleeve 32 includes a tubular body 321, the inner wall of the tubular body 321 is provided with a thread 322, the threaded rod 312 is threadedly matched with the thread 322 on the inner wall of the tubular body 321, the battery cell limiting and clamping plate 33 includes a limiting pressure block 331 and a rubber sleeve 332, the limiting pressure block 331 is provided with a blind hole 333, the rubber sleeve 332 is matched and embedded in the blind hole 333, and the connecting rod 313 is matched and embedded in the rubber sleeve 332.

[0038] The battery box side wall 2 is composed of four side walls, and the battery cell lateral limiting and clamping device 3 is respectively arranged on each side wall. A group of battery cells is accommodated in the open box composed of the battery box bottom wall 1 and the four battery box side walls 2. The battery box side wall 2 corresponds to each battery cell in the battery cell group and has two battery cell lateral limiting and clamping devices 3 arranged above and below. By adjusting each battery cell lateral limiting and clamping device 3 on the four side walls, the lateral limiting and fixing of a group of battery cells to the outer side wall is achieved.

[0039] Example 2

[0040] See also Figure 4-Figure 6As shown, a battery pack with a fixed square battery cell device includes a battery box bottom wall 1, a battery box side wall 2 and a battery cell lateral limiting and pressing device 3 arranged on the battery box side wall 2; the battery box side wall 2 is arranged on the upper end surface of the battery box bottom wall 1, and the battery box bottom wall 1 and the battery box side wall 2 constitute a box body with an upper end opening; eighty battery cell lateral limiting and pressing devices 3 are telescopically sleeved on the four battery box side walls 2, and the battery box side wall 2 provided with the battery cell lateral limiting and pressing device 3 corresponds to each battery cell group The battery cell is provided with two battery cell lateral limiting and clamping devices 3; the battery cell lateral limiting and clamping device 3 includes a clamping telescopic rod 31, a telescopic rod limiting sleeve 32 and a battery cell limiting and clamping plate 33, the telescopic rod limiting sleeve 32 is passed through and fixed on the side wall 2 of the battery box, the clamping telescopic rod 31 can be telescopically sleeved in the telescopic rod limiting sleeve 32, and the front end of the clamping telescopic rod 31 is exposed in the side wall 2 of the battery box, the front end of the clamping telescopic rod 31 is connected to the battery cell limiting and clamping plate 33, and the front end of the battery cell limiting and clamping plate 33 can be in limited contact with the side end face of the battery cell.

[0041] The compression telescopic rod 31 includes an adjustment knob 311 with anti-slip grooves, a threaded rod 312, and a connecting rod 313. The front and rear ends of the threaded rod 312 are fixedly connected to the connecting rod 313 and the adjustment knob 311 respectively; the telescopic rod limiting sleeve 32 includes a tubular body 321, the inner wall of the tubular body 321 is provided with a thread 322, the threaded rod 312 is threadedly matched with the thread 322 on the inner wall of the tubular body 321, the battery cell limiting and clamping plate 33 includes a limiting pressure block 331 and a bearing 334, the limiting pressure block 331 is provided with a blind hole 333, the outer ring of the bearing 334 is matched and embedded in the blind hole 333, and the connecting rod 313 is matched and embedded and fixed to the inner ring of the bearing.

[0042] The battery case side wall 2 includes a battery case inner wall 21 and a battery case outer wall 22, which are respectively arranged on the upper end surface of the battery case bottom wall 1, and the battery case inner wall 21 and the battery case outer wall 22 are arranged on the battery case bottom wall 1 to form a U-shaped structure, and the battery cell lateral limiting and clamping device 3 is telescopically sleeved on the battery case inner wall 21, and the battery cell limiting and clamping plate 33 of the battery cell lateral limiting and clamping device 3 is accommodated in the space enclosed by the battery case inner wall 21, and the adjustment knob 311 with anti-slip grooves of the battery cell lateral limiting and clamping device 3 is accommodated in the space enclosed between the battery case inner wall 21 and the battery case outer wall 22; the battery case outer walls 22 adjacent to each other and each battery case outer wall 22 and the battery case bottom wall 1 are all detachably fixedly connected.

[0043] The battery box side wall 2 corresponds to each battery cell in the battery cell group and has two battery cell lateral limiting and clamping devices 3 arranged above and below. The two battery cell lateral limiting and clamping devices 3 are connected for synchronous transmission above and below via a first transmission belt 4 with internal teeth. The first transmission belt 4 is respectively engaged with the circumferential side walls of the adjustment knobs 311 with anti-slip grooves of the two battery cell lateral limiting and clamping devices 3.

[0044] The two adjacent battery cell lateral limiting and clamping devices 3 on the same horizontal plane corresponding to two left and right adjacent battery cell positions in the battery cell group on the side wall 2 of the battery box are connected horizontally and synchronously through a second transmission belt 5 with internal teeth. The second transmission belt 5 is respectively engaged with the circumferential side walls of the adjustment knobs 311 with anti-slip grooves of the two horizontally adjacent battery cell lateral limiting and clamping devices 3.

[0045] A multi-cell group heat insulation baffle 212 in a cross structure or a tic-tac-toe structure is also fixedly installed in the rectangular space enclosed by the inner wall 21 of the battery box. The outer end of each vertical surface of the multi-cell group heat insulation baffle 212 is fixedly connected to the corresponding inner wall 21 of the battery box and the outer wall 22 of the battery box.

[0046] Example 3

[0047] See also Figure 4 and Figure 7-Figure 9 As shown, a battery pack with a fixed square battery cell device includes a battery box bottom wall 1, a battery box side wall 2 and a battery cell lateral limiting and pressing device 3 arranged on the battery box side wall 2; the battery box side wall 2 is arranged on the upper end surface of the battery box bottom wall 1, and the battery box bottom wall 1 and the battery box side wall 2 constitute a box body with an upper end opening; eighty battery cell lateral limiting and pressing devices 3 are telescopically sleeved on the four battery box side walls 2, and the battery box side wall 2 provided with the battery cell lateral limiting and pressing device 3 corresponds to each battery cell group The battery cell is provided with two battery cell lateral limiting and clamping devices 3; the battery cell lateral limiting and clamping device 3 includes a clamping telescopic rod 31, a telescopic rod limiting sleeve 32 and a battery cell limiting and clamping plate 33, the telescopic rod limiting sleeve 32 is passed through and fixed on the side wall 2 of the battery box, the clamping telescopic rod 31 can be telescopically sleeved in the telescopic rod limiting sleeve 32, and the front end of the clamping telescopic rod 31 is exposed in the side wall 2 of the battery box, the front end of the clamping telescopic rod 31 is connected to the battery cell limiting and clamping plate 33, and the front end of the battery cell limiting and clamping plate 33 can be in limited contact with the side end face of the battery cell.

[0048] The compression telescopic rod 31 includes an adjustment knob 311 with anti-slip grooves, a connecting rod 313, a positioning cylinder 314 and a positioning pin 315. The front and rear ends of the positioning cylinder 314 are fixedly connected to the connecting rod 313 and the adjustment knob 311 respectively. Five positioning blind holes 316 are distributed on the circumferential side wall of the positioning cylinder 314. The five positioning blind holes 316 are equidistantly arranged in the form of a spiral line on the circumferential side wall of the positioning cylinder 314. The telescopic rod limiting sleeve 32 includes a tubular body 321, a tubular body A positioning through hole 323 is provided on the side wall of 321, the positioning cylinder 314 is slidably sleeved in the tubular body 321, and the positioning pin 315 is inserted into a positioning blind hole 316 of the positioning cylinder 314 through the positioning through hole 323 of the tubular body 321. The battery cell limiting and clamping plate 33 includes a limiting pressure block 331 and a rubber sleeve 332. A blind hole 333 is provided on the limiting pressure block 331, and the rubber sleeve 332 is matched and embedded in the blind hole 333. The connecting light rod 313 is matched and embedded in the rubber sleeve 332.

[0049] The battery case side wall 2 includes a battery case inner wall 21 and a battery case outer wall 22, which are respectively arranged on the upper end surface of the battery case bottom wall 1, and the battery case inner wall 21 and the battery case outer wall 22 are arranged on the battery case bottom wall 1 to form a U-shaped structure, and the battery cell lateral limiting and clamping device 3 is telescopically sleeved on the battery case inner wall 21, and the battery cell limiting and clamping plate 33 of the battery cell lateral limiting and clamping device 3 is accommodated in the space enclosed by the battery case inner wall 21, and the adjustment knob 311 with anti-slip grooves of the battery cell lateral limiting and clamping device 3 is accommodated in the space enclosed between the battery case inner wall 21 and the battery case outer wall 22; the battery case outer walls 22 adjacent to each other and each battery case outer wall 22 and the battery case bottom wall 1 are all detachably fixedly connected.

[0050] Two adjacent battery box inner side walls 21 at each corner position of the battery box inner side wall 21 respectively extend outward with a connecting surface 211, and each connecting surface 211 is fixedly connected to the corresponding battery box outer side wall 22. The four battery box inner side walls 21 and the eight connecting surfaces 211 form a well-shaped structure, and the four battery box inner side walls 21, the eight connecting surfaces 211 and the four battery box outer side walls 22 together form a criss-cross frame structure.

[0051] A multi-cell group heat insulation baffle 212 in a cross structure is also fixedly installed in the rectangular space enclosed by the inner wall 21 of the battery box. The outer end of each vertical surface of the multi-cell group heat insulation baffle 212 is fixedly connected to the corresponding inner wall 21 and outer wall 22 of the battery box.

[0052] Example 4

[0053] An automobile comprises an engine compartment and also comprises a battery pack with a fixed square battery cell device, wherein the battery pack with a fixed square battery cell device is arranged in the engine compartment.

[0054] Although the present invention has been particularly shown and described in conjunction with preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made to the present invention without departing from the spirit and scope of the invention as defined in the appended claims, and all such changes are within the scope of protection of the present invention.

Claims

1. A battery pack having a fixed square cell device, characterized in that: The invention comprises a battery box bottom wall (1), a battery box side wall (2), and a cell side limiting and pressing device (3) arranged on the battery box side wall (2); the battery box side wall (2) is arranged on the upper end surface of the battery box bottom wall (1), and the battery box bottom wall (1) and the battery box side wall (2) constitute a box with an upper end opening; at least one of the two opposite battery box side walls (2) is provided with a plurality of cell side limiting and pressing devices (3) telescopically sleeved on the battery box side wall (2), and each cell of the cell group is provided with a cell side limiting and pressing device (3). At least one battery cell lateral limiting and pressing device (3); the battery cell lateral limiting and pressing device (3) comprises a pressing telescopic rod (31), a telescopic rod limiting sleeve (32) and a battery cell limiting and pressing plate (33); the telescopic rod limiting sleeve (32) is fixed on the battery box side wall (2); the pressing telescopic rod (31) is telescopically sleeved in the telescopic rod limiting sleeve (32), and the front end of the pressing telescopic rod (31) is exposed in the battery box side wall (2); the front end of the pressing telescopic rod (31) is connected to the battery cell limiting and pressing plate (33); and the front end of the battery cell limiting and pressing plate (33) can be in limiting contact with the side end face of the battery cell.

2. The battery pack with a fixed square cell device according to claim 1, characterized in that: The compression telescopic rod (31) comprises an adjustment knob (311) with anti-slip grooves, a threaded rod (312), and a connecting rod (313), wherein the front and rear ends of the threaded rod (312) are fixedly connected to the connecting rod (313) and the adjustment knob (311), respectively; the telescopic rod limiting sleeve (32) comprises a tubular body (321), wherein the inner wall of the tubular body (321) is provided with a thread (322), and the threaded rod (312) is threadedly matched with the thread (322) on the inner wall of the tubular body (321); the battery cell limiting compression plate (33) comprises a limiting pressing block (331) and a rubber sleeve (332), wherein the limiting pressing block (331) is provided with a blind hole (333), and the rubber sleeve (332) is matched and embedded in the blind hole (333), and the connecting rod (313) is matched and embedded and sleeved in the rubber sleeve (332).

3. The battery pack with a fixed square cell device according to claim 1, characterized in that: The compression telescopic rod (31) includes an adjustment knob (311) with anti-slip grooves, a threaded rod (312), and a connecting rod (313), wherein the front and rear ends of the threaded rod (312) are fixedly connected to the connecting rod (313) and the adjustment knob (311), respectively; the telescopic rod limiting sleeve (32) includes a tubular body (321), wherein the inner wall of the tubular body (321) is provided with a thread (322), and the threaded rod (312) is threadedly matched with the thread (322) on the inner wall of the tubular body (321); the battery cell limiting compression plate (33) includes a limiting pressing block (331) and a bearing (334), wherein the limiting pressing block (331) is provided with a blind hole (333), and the outer ring of the bearing (334) is matched and embedded in the blind hole (333), and the connecting rod (313) is matched and embedded in the inner ring of the bearing.

4. The battery pack with a fixed square cell device according to claim 1, characterized in that: The compression telescopic rod (31) includes an adjustment knob (311) with anti-slip grooves, a connecting rod (313), a positioning cylinder (314) and a positioning pin (315). The front and rear ends of the positioning cylinder (314) are fixedly connected to the connecting rod (313) and the adjustment knob (311), respectively. A plurality of positioning blind holes (316) are distributed on the circumferential side wall of the positioning cylinder (314). The plurality of positioning blind holes (316) are equidistantly arranged in the form of a spiral line on the circumferential side wall of the positioning cylinder (314). The telescopic rod limiting sleeve (32) includes a tubular body (321), the tubular body (32 1) A positioning through hole (323) is provided on the side wall, the positioning cylinder (314) is slidably sleeved in the tubular body (321), the positioning pin (315) is inserted into a positioning blind hole (316) of the positioning cylinder (314) through the positioning through hole (323) of the tubular body (321), the battery cell limiting pressing plate (33) includes a limiting pressing block (331) and a rubber sleeve (332), the limiting pressing block (331) is provided with a blind hole (333), the rubber sleeve (332) is matched and embedded in the blind hole (333), and the connecting light rod (313) is matched and embedded and sleeved in the rubber sleeve (332).

5. A battery pack with a fixed square cell device according to any one of claims 2 to 4, characterized in that: Two battery cell lateral limiting and pressing devices (3) are arranged above and below the side wall (2) of the battery box corresponding to each battery cell of the battery cell group. The two battery cell lateral limiting and pressing devices (3) arranged above and below are synchronously connected by a first transmission belt (4) with internal teeth. The first transmission belt (4) is respectively engaged with the circumferential side walls of the adjustment knobs (311) with anti-slip grooves of the two battery cell lateral limiting and pressing devices (3).

6. The battery pack with a device for fixing square cells according to claim 5, characterized in that: The battery box side wall (2) corresponds to two adjacent battery cell positions in the battery cell group at the same horizontal plane of the two adjacent battery cell positions via a second transmission belt (5) with internal teeth for horizontal synchronous transmission connection. The second transmission belt (5) is respectively engaged with the circumferential side walls of the adjustment knobs (311) with anti-slip grooves of the two horizontally adjacent battery cell lateral limiting and pressing devices (3).

7. The battery pack with a device for fixing square cells according to claim 6, characterized in that: The battery box side wall (2) includes a battery box inner wall (21) and a battery box outer wall (22), the battery box inner wall (21) and the battery box outer wall (22) are respectively arranged on the upper end surface of the battery box bottom wall (1), the battery box inner wall (21) and the battery box outer wall (22) are arranged on the battery box bottom wall (1) to form a round-shaped structure, the battery cell lateral limiting and pressing device (3) is telescopically sleeved on the battery box inner wall (21), and the battery cell lateral limiting The cell limiting and pressing plate (33) of the pressing device (3) is accommodated in the space enclosed by the inner wall (21) of the battery box body, and the adjusting knob (311) with anti-slip grooves of the cell lateral limiting and pressing device (3) is accommodated in the space enclosed between the inner wall (21) of the battery box body and the outer wall (22) of the battery box body; the outer walls (22) of the battery box body adjacent to each other and each outer wall (22) of the battery box body are detachably fixedly connected to each other.

8. The battery pack with a device for fixing square cells according to claim 7, characterized in that: Two adjacent battery box inner walls (21) at each corner position of the battery box inner wall (21) respectively extend outward to form a connecting surface (211), and each connecting surface (211) is fixedly connected to the corresponding battery box outer wall (22). The four battery box inner walls (21) and the eight connecting surfaces (211) form a well-shaped structure, and the four battery box inner walls (21), the eight connecting surfaces (211) and the four battery box outer walls (22) together form a crisscross frame structure.

9. The battery pack with a fixed square cell device according to claim 8, characterized in that: A multi-cell group heat-insulating baffle (212) in a cross structure or a tic-tac-toe structure is fixedly arranged in the rectangular space enclosed by the inner side wall (21) of the battery box, and the outer side end of each vertical surface of the multi-cell group heat-insulating baffle (212) is fixedly connected to the corresponding inner side wall (21) and outer side wall (22) of the battery box.

10. An automobile, comprising an engine compartment, characterized in that: It also includes a battery pack with a fixed square battery cell device as described in any one of claims 1 to 9, and the battery pack with a fixed square battery cell device is arranged in the engine compartment.

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