Battery press-fit frame, battery pack structure, battery pack, and battery pack assembly method

Abstract

The application discloses a battery pressing frame, a battery pack structure, a battery pack and a battery pack assembling method. The battery pack is internally provided with a plurality of battery pack structures. The battery pack structure comprises a plurality of battery pressing frames arranged on slide rails through slide blocks and batteries arranged on the battery pressing frames. The top of the battery pack structure is pressed and held through a pressing strip. The battery pressing frame is an L-shaped frame body. Each battery of the battery pack is arranged on an independent battery pressing frame, so that the mutual influence between the batteries is small, and therefore the assembling of the battery pack is facilitated, and the maintenance of the single battery of the battery pack is facilitated. Since the battery pressing frame is arranged on the slide rail, the impact force in the front-rear direction can be evenly borne by the buffer pads, and therefore the impact resistance of the battery pack in the front-rear direction is enhanced.

Description

Technical Field

[0001] The present invention relates to a battery pack, and in particular to a battery assembly technology for a module-free battery pack. Background Art

[0002] Currently, CTP (Cell to Pack) technology is popular in power battery packs. Battery packs using CTP technology are module-free, consisting of several cells housed in a battery box. Since CTP technology eliminates the need for intermediate components in the battery module, securing the individual cells becomes a challenge. Patent document CN 110676413A discloses a cell partition frame for a battery pack and its associated battery pack. In the technical solution disclosed in this patent, the battery pack is assembled using the cell partition frame, with each cell being positioned within a cell compartment within the cell partition frame. This technical solution presents the following issues: Placing batteries within the cell compartments is highly inconvenient, requiring assembly from the bottom up. Specifically, the batteries must first be placed on the bottom cell frame, with end frames installed at both ends. The top cell frame is then installed above the batteries. Because the batteries are movable before the top cell frame is installed, alignment of the top cell frame and the batteries is required during installation, which is quite cumbersome. Therefore, if a problem occurs with a battery and the power battery pack is maintained, it is troublesome to remove and reinstall the battery. Summary of the Invention

[0003] Problems to be solved by the present invention: assembly and fixation of batteries in a battery box, and convenience of assembly and maintenance of the battery pack.

[0004] To solve the above problems, the present invention adopts the following solutions:

[0005] According to the present invention, the battery press-mounted frame includes a vertical frame plate and a horizontal frame plate; the vertical frame plate is vertical, and the horizontal frame plate is horizontal; the vertical frame plate and the horizontal frame plate are connected to form an L-shaped structure, the vertical frame plate is connected to the rear end of the horizontal frame plate, and the horizontal frame plate is connected to the bottom end of the vertical frame plate; a mechanism for setting a buffer pad is provided on the vertical frame plate; vertical side limit plates are provided on both sides of the horizontal frame plate, and a thermal pad groove is provided on the top surface; a thermal pad hole is provided in the thermal pad groove; a connection clamping hole is provided on the front end surface of the horizontal frame plate, and a first connection clamping protrusion is provided on the rear end surface, so that the first connection clamping protrusion of one of the battery press-mounted frames can be clamped into the connection clamping hole of another battery press-mounted frame.

[0006] The battery pack structure according to the present invention comprises a plurality of battery press-mounted racks, a plurality of batteries and a front-end frame plate; the battery press-mounted rack comprises a vertical frame plate and a horizontal frame plate; the vertical frame plate is vertical and the horizontal frame plate is horizontal; the horizontal frame plate is connected to the bottom end of the vertical frame plate so that the vertical frame plate and the horizontal frame plate are connected and form an L-shaped structure; vertical side limit plates are provided on both sides of the horizontal frame plate; the batteries are square batteries, and their battery poles are located on the top surface thereof; each battery is respectively arranged on the horizontal frame plate of each battery press-mounted rack; a mechanism for arranging a buffer pad is provided on the vertical frame plate, and a buffer pad is provided through the mechanism so that the battery and the vertical frame plate are separated by the buffer pad; the front end of the horizontal frame plate A connecting clamping hole is provided on the surface, and a first connecting clamping protrusion is provided on the rear end surface; a second connecting clamping protrusion is provided on the bottom of the rear side surface of the front end frame; thus, the first connecting clamping protrusion of one battery pressing frame is clamped into the connecting clamping hole of another battery pressing frame, so that the various battery pressing frames are arranged in a row and connected into one, and the frontmost battery pressing frame is connected to the front end frame by engaging the connecting clamping hole of the frontmost battery pressing frame with the second connecting clamping protrusion on the front end frame; a mechanism for setting a buffer pad is provided on the rear side surface of the front end frame, and a buffer pad is provided thereby, so that the battery on the frontmost battery pressing frame is separated from the front end frame through the buffer pad.

[0007] Furthermore, according to the battery pack structure of the present invention, the mechanism for arranging the buffer pad on the vertical frame plate is a frame plate hollow hole on the vertical frame plate; the buffer pad is stuck in the frame plate hollow hole.

[0008] Furthermore, according to the battery pack structure of the present invention, the mechanism for setting the buffer pad on the vertical frame is a buffer pad groove set on the front and rear sides of the vertical frame; the buffer pads are respectively stuck in the buffer pad grooves on the front and rear sides and are close to the vertical frame.

[0009] The battery pack according to the present invention comprises a box body and a plurality of the above-mentioned battery pack structures arranged in the box body, and a pressure strip arranged on the battery pack structure; the pressure strip is arranged on the top of the battery pack structure to press the battery structure into the box body.

[0010] Furthermore, according to the battery pack of the present invention, a slide rail is provided on the bottom plate of the box body; the horizontal frame plate of the battery press-fitting frame is provided on the slide rail through a slider, so that the battery press-fitting frame can slide in the front and rear directions on the slide rail; an insertion pad is provided between the front frame plate of the battery pack structure and the box body, and each battery press-fitting frame is fixed to the slide rail through the insertion pad.

[0011] Furthermore, according to the battery pack of the present invention, each battery pack structure corresponds to two slide rails parallel to each other; and a heating plate is provided between the two slide rails corresponding to the battery pack structures.

[0012] Furthermore, according to the battery pack of the present invention, the battery pack structure also includes a plurality of thermally conductive pads; a thermally conductive pad groove is provided on the top surface of the horizontal frame plate; a thermally conductive pad hole is provided in the thermally conductive pad groove; each thermally conductive pad is respectively arranged in the thermally conductive pad groove of each battery press-fitting frame; the thermally conductive pad includes a thermally conductive main body plate and a thermally conductive thickened plate; the thermally conductive main body plate is stuck in the thermally conductive pad groove, and the thermally conductive thickened plate passes through the thermally conductive pad hole and is close to the heating plate; the thermally conductive main body plate is close to the bottom surface of the battery.

[0013] Furthermore, according to the battery pack of the present invention, both ends of the pressure strip are fixedly connected to the box body by bolt connection; the first shoulder groove is provided on both sides of the top of the vertical frame plate of the battery press frame; the second shoulder groove is provided on both sides of the top of the front frame plate; the two pressure strips are respectively provided on the upper channels formed by the first shoulder grooves and the second shoulder grooves on both sides of the top of the battery pack structure, so that the two pressure strips clamp the vertical frame plate and the front frame plate laterally.

[0014] Furthermore, according to the battery pack of the present invention, it also includes a wiring harness isolation plate arranged on the top of the battery pack structure; the wiring harness isolation plate is located between two moldings; the molding includes a molding sleeve and a skeleton bar arranged in the molding sleeve; the molding is fixedly connected to the box body through bolts arranged in the molding mounting holes at both ends of the skeleton bar.

[0015] Further, according to the battery pack of the present invention, the battery press-mounted frame located at the rear end of the battery pack structure is the rear end press-mounted frame, and the other battery press-mounted frames are the middle press-mounted frames; the vertical frame plate of the rear end press-mounted frame is close to the inner side surface of the rear end plate of the box body; the top of the vertical frame plate of the middle press-mounted frame is provided with a plurality of wire harness isolation plate clamping slots; the bottom of the wire harness isolation plate is provided with a frame plate clamping strip matching the wire harness isolation plate clamping slot; the frame plate clamping strip is clamped into the wire harness isolation plate clamping slot.

[0016] According to the battery pack assembly method of the present invention, the assembly method is used for assembling the above-mentioned battery pack; the assembly method comprises the following steps:

[0017] S1: Install the slide rail and heating plate on the box body, and install the slider on the slide rail;

[0018] S2: Install each battery press frame on the slider with bolts;

[0019] S3: Install the components on the battery press frame of the battery pack structure one by one from the rear end to the front end. After completing the installation of each component on the battery press frame, apply a backward pressing force to the battery press frame with the completed component installed, so that the battery press frame slides backward, and then the first connecting clamping protrusion at the rear end of the battery press frame is inserted into the connecting clamping hole at the front end of the adjacent battery press frame at the rear; the components on the battery press frame include a buffer pad and a battery.

[0020] S4: After all battery press-assembly frames on the battery pack structure are installed, a buffer pad is installed on the front frame plate, and then the second connecting and locking protrusion on the front frame plate is inserted into the connecting and locking hole of the battery press-assembly frame at the front end of the battery pack structure, so that the buffer pad on the front frame plate is tightly attached to the batteries on the battery press-assembly frame at the front end of the battery pack structure;

[0021] S5: Pressing the front frame plate backward to compress the cushions on the battery pack structure, and then inserting a gasket between the front of the front frame plate and the box body; then releasing the pressure of the front frame plate so that the gasket plate is clamped between the front frame plate and the box body;

[0022] S6: Installing a holding strip on the battery pack structure so that the holding strip presses the battery pack structure.

[0023] The technical effects of the present invention are as follows:

[0024] 1. Each battery in the battery pack is fixed by a separate battery press frame. The battery press frame isolates the batteries from each other during assembly, which reduces the impact between the batteries. This facilitates the assembly of the battery pack and the maintenance of individual batteries in the battery pack.

[0025] 2. Because the battery press-fitting frames are mounted on front-to-back rails via sliders, the sliding of the sliders on the rails effectively distributes the force of front-to-back vibrations or impacts to each battery press-fitting frame, allowing the force to be absorbed by the cushioning pads between each battery press-fitting frame and the battery. In other words, with this structure, when the front end experiences an impact, the force is evenly distributed across the cushioning pads, enhancing the battery pack's ability to withstand front-to-back impacts. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 1 is an exploded view of a battery pack embodiment of the present invention.

[0027] Figure 2 It is a schematic structural diagram of the pressure strip of the battery pack structure of the present invention.

[0028] Figure 3 yes Figure 2 Exploded diagram of .

[0029] Figure 4 This is an exploded view of the components between the battery press frame and the battery.

[0030] Figure 5 It is a schematic diagram of the three-dimensional structure of the battery press-mounting rack.

[0031] Figure 6 This is an exploded diagram of the rear end press frame and the buffer pad.

[0032] Figure 7 is an exploded view of the front end bracket and the cushion.

[0033] Figure 8 is a perspective view of another embodiment of the battery press-fit bracket.

[0034] Figure 9 is a perspective view of the heat-conducting cushion plate.

[0035] Figure 10 is a perspective view of the box.

[0036] Figure 11 is a top view of the plug-in cushion plate.

[0037] Figure 12 is a cross-sectional view of the pressing strip and the wire harness isolation plate.

[0038] Figure 13 is a perspective view of the end structure of the pressing strip and the wire harness isolation plate.

[0039] wherein,

[0040] 1 is the box, 11 is the front end plate, 111 is the connector, 12 is the rear end plate, 13 is the side plate, 14 is the bottom plate, 141 is the heating plate slot, 142 is the slide rail mounting strip, 15 is the inner partition bracket plate, 151 is the plug-in cushion plate slot, 152 is the triangular reinforcing rib, 161 is the first pressing strip mounting column, 162 is the second pressing strip mounting column, 191 is the battery cavity, 192 is the BMS module cavity;

[0041] 2 is the battery press-fit bracket, 200 is the battery structure, 201 is the middle press-fit bracket, 202 is the rear end press-fit bracket, 21 is the vertical bracket plate, 211 is the cushion slot, 212 is the bracket plate hollow hole, 213 is the first shoulder groove, 214 is the wire harness isolation plate clamping groove, 219 is the reinforcing rib, 22 is the horizontal bracket plate, 221 is the heat-conducting cushion slot, 222 is the heat-conducting cushion hole, 223 is the slide block mounting hole, 23 is the side limiting plate, 241 is the connecting clamping hole, 242 is the first connecting clamping convex;

[0042] 3 is the battery, 31 is the battery pole;

[0043] 41 is the front end bracket plate, 411 is the cushion plate slot, 412 is the second connecting clamping convex, 413 is the second shoulder groove, 42 is the plug-in cushion plate, 421 is the plug-in cushion plate clamping strip, 422 is the cushion convex strip, 423 is the cushion concave groove, 43 is the cushion, 431 is the base plate, 432 is the back-shaped bracket plate, 44 is the heat-conducting cushion plate, 441 is the heat-conducting body plate, 442 is the heat-conducting thickened plate;

[0044] 51 is the slide rail, 52 is the slide block, 53 is the heating plate;

[0045] 61 is a beading, 611 is a beading sleeve, 612 is a beading sleeve hole, 613 is a frame bar, 614 is a beading connection part, 615 is a beading mounting hole, 62 is a wiring harness isolation plate, 621 is a pole hole, and 622 is a frame board clip.

[0046] F is the front and rear end direction of the battery pack, and the arrow F points from the rear end to the front end. DETAILED DESCRIPTION

[0047] The present invention will be described in further detail below with reference to the accompanying drawings.

[0048] like Figure 1 As shown, the battery pack includes a housing 1, several battery pack structures 200 disposed within the housing 1, a holding strip 61 disposed on the battery pack structures 200, and a wiring harness isolation plate 62. The battery pack structure 200 is formed by press-fitting a plurality of batteries 3 together. The battery pack structure 200 is held in place within the housing 1 by the holding strip 61.

[0049] Reference Figure 10 The box body 1 is a square structure with an upper opening surrounded by a vertical front panel 11, a vertical rear panel 12, two vertical side panels 13 and a horizontal bottom panel 14. A vertical inner partition panel 15 is provided in the box body 1. The inner partition panel 15 divides and isolates the accommodating cavity of the box body 1 into a battery cavity 191 and a BMS module cavity 192. The battery cavity 191 is located between the inner partition panel 15 and the rear panel 12; the BMS module cavity 192 is located between the inner partition panel 15 and the front panel 11. Among them, the battery pack structure 200 is arranged in the battery cavity 191. The BMS module cavity 192 is used to set the BMS module. BMS is the battery management system. A number of connectors 111 are provided on the front panel 11. The connectors 111 are used to electrically connect the BMS module to the outside of the battery pack. The inner shelf plate 15 is a long strip, connected to the side plates 13 at both ends and to the bottom plate 14 at the bottom. It is reinforced by triangular reinforcement ribs 152 in the BMS module cavity 192. The bottom plate 14 is provided with a heating plate slot 141 and a slide rail mounting bar 142.

[0050] Reference Figure 2 and Figure 3The battery pack structure 200 includes a plurality of battery press racks 2, a plurality of batteries 3, a front frame plate 41, a plurality of buffer pads 43, and a slide rail 51. The number of battery press racks 2 is the same as the number of batteries 3, and each battery press rack 2 corresponds to one battery 3. The batteries 3 are arranged on the battery press racks 2, and by arranging the battery press racks 2 on the slide rail 51 in front and back, combined with the front frame plate 41 connected to the frontmost battery press rack 2, the batteries 3 of the battery pack structure 200 are arranged in a row in front and back. The arrangement direction of the batteries 3 of the battery pack structure 200 is parallel to the front and rear end direction F of the battery pack. Among them, the battery press rack 2 at the rear end is the rear end press rack 202, and the other battery press racks 2 are the middle press racks 201. The front end of the frontmost battery press rack 2 is sealed at the front end of the battery pack structure 200 by setting the front frame plate 41.

[0051] Battery press rack 2, refer to Figure 4 、 Figure 5 、 Figure 6 The vertical frame 21 and the horizontal frame 22 are vertical and horizontal. The horizontal frame 22 is connected to the bottom of the vertical frame 21, forming an L-shaped structure. The vertical frame 21 is equipped with a mechanism for providing a cushion. The horizontal frame 22 is a plate structure with vertical side limit plates 23 on both sides.

[0052] The battery 3 is arranged on the horizontal frame 22 of the battery press frame 2. Specifically, the battery 3 is a square battery, and the battery pole 31 is located on the top surface of the battery 3, and the bottom surface is close to the horizontal frame 22. The battery press frame 2 is arranged in such a way that the horizontal frame 22 is located in front of the vertical frame 21. The two battery poles 31 of the battery 3 are respectively located on both sides of the central axis of the battery pack structure 200. The arrangement direction of the battery poles 31 of the battery 3 is perpendicular to the central axis of the battery pack structure 200. The central axis of the battery pack structure 200 is parallel to the front and rear ends of the battery pack in the direction F. The end faces of the battery 3 are close to the side limit plates 23, so that the battery 3 is clamped between the side limit plates 23 on both sides. The rear side of the battery 3 is held in close contact with the vertical frame plate 21 of the current battery press-assembly rack 2 via a cushioning pad 43. The front side of the battery 3 is also held in close contact with the vertical frame plate 21 of the adjacent battery press-assembly rack 2 in front, or the front side of the battery 3 on the frontmost battery press-assembly rack 2 is held in close contact with the front frame plate 41 via a cushioning pad 43. Here, the end face of the battery 3 refers to a vertical surface perpendicular to the arrangement direction of the battery posts 31 of the battery 3, and the side face of the battery 3 refers to a vertical surface parallel to the arrangement direction of the battery posts 31 of the battery 3. Obviously, the end face of the battery 3 is parallel to the front and rear ends of the battery pack, facing F, while the side face is perpendicular to the front and rear ends of the battery pack, facing F.

[0053] The buffer pad 43 is set on the vertical frame plate 21 of the battery press-fitting frame 2 or on the front frame plate 41 through a mechanism for setting the buffer pad. For the rear press-fitting frame 202, the mechanism for setting the buffer pad is the buffer pad groove 211 set in front of the vertical frame plate 21. Figure 6 The vertical frame plate 21 of the rear end press-fitting frame 202 is provided with a reinforcing rib 219 at the rear and a buffer pad groove 211 at the front. The buffer pad groove 211 is a groove body with a U-shaped structure. To match this, the buffer pad 43 includes a base plate 431 and a U-shaped frame plate 432. The U-shaped frame plate 432 is a square base plate 431 with a thickness greater than that of the U-shaped plate body formed by the base plate 431. The U-shaped frame plate 432 is made of elastic material. The U-shaped frame plate 432 matches the U-shaped buffer pad groove 211, so that the buffer pad 43 is inserted into the buffer pad groove 211 through the U-shaped frame plate 432 and is tightly attached to the front side of the vertical frame plate 21.

[0054] For the intermediate press-fitting frame 201, the mechanism for setting the buffer pad is the buffer pad groove 211 provided on the front and rear of the vertical frame plate 21. Figure 4 and Figure 5 The vertical frame plate 21 of the middle press-fitting frame 201 is a plate body with a frame plate hollow hole 212 in the middle. The frame plate hollow hole 212 is a square structure. Around the edge of the frame plate hollow hole 212, a buffer pad groove 211 with a U-shaped structure is provided on the front and back of the vertical frame plate 21. The U-shaped frame plate 432 is inserted into the buffer pad groove 211, so that the two buffer pads 43 are respectively in close contact with the front and back of the vertical frame plate 21. That is, for the rear end press-fitting frame 202, the buffer pad 43 is only provided on the front of the vertical frame plate 21, while for the middle press-fitting frame 201, the buffer pad 43 is provided on both the front and back of the vertical frame plate 21. As a result, the side of the battery 3 is separated from the vertical frame plate 21 by the buffer pad 43.

[0055] For the intermediate press-fit rack 201, Figure 8 Another embodiment of providing a cushion 43 is shown. Figure 8 In this embodiment, the edge of the vertical frame plate 21's hollow hole 212 is not provided with a buffer pad groove 211, and the buffer pad 43 is directly inserted into the hollow hole 212. In this case, the mechanism for installing the buffer pad is the hollow hole 212 on the vertical frame plate 21. Obviously, in this embodiment, the thickness of the buffer pad 43 should be greater than the thickness of the vertical frame plate 21, so that both the front and back sides of the vertical frame plate 21 can be separated from the battery 3 by the buffer pad 43.

[0056] For the front frame plate 41, refer to Figure 7The mechanism for placing a cushioning pad is a cushioning pad slot 411 located on the rear of the front frame 41. The front frame 41 is a plate structure. The cushioning pad slot 411 is identical in structure to the cushioning pad slot 211 located on the vertical frame 21 of the rear press-fitting frame 202. The circular frame 432 snaps into the cushioning pad slot 411, placing the cushioning pad 43 in close contact with the rear of the front frame 41. This ensures that the side surfaces of the batteries 3 on the frontmost battery press-fitting frame 2 are separated from the front frame 41 by the cushioning pad 43.

[0057] In actual assembly of this embodiment, the buffer pad 43 can be bonded to the front frame plate 41, the buffer pad 43 can be bonded to the vertical frame plate 21, and the buffer pad 43 can be bonded to the side of the battery 3 using structural adhesive.

[0058] The battery press-mounted frame 2 is mounted on a slider 52. Specifically, a slider mounting hole 223 is provided on the horizontal frame 22 of the battery press-mounted frame 2. The horizontal frame 22 is secured to the slider 52 via bolts disposed within the slider mounting hole 223, positioning the horizontal frame 22 in front of the vertical frame 21 of the battery press-mounted frame 2. The slider 52 is mounted on a slide rail 51 and is capable of sliding along the slide rail 51. Each battery pack structure 200 corresponds to two slide rails 51. The two slide rails 51 are parallel and are mounted on the slide rail mounting strip 142 of the bottom plate 14 of the housing 1, with the front and rear ends of the battery pack facing in the F direction. This allows the battery press-mounted frame 2 to slide forward and backward on the slide rail 51.

[0059] In this embodiment, the front end surface of the horizontal frame plate 22 of the battery press-assembly frame 2 is provided with connection latch holes 241 on both sides, and the rear end surface is provided with first connection latch protrusions 242 on both sides. This allows the first connection latch protrusions 242 of one battery press-assembly frame 2 to engage with the connection latch holes 241 of another battery press-assembly frame 2. During assembly of this embodiment, the battery press-assembly frames 2 slide on the slide rails 51, causing the first connection latch protrusions 242 of the front battery press-assembly frame 2 to engage with the connection latch holes 241 of the rear battery press-assembly frame 2. This connects all battery press-assembly frames 2 of the battery pack structure 200 via the first connection latch protrusions 242 and connection latch holes 241. Accordingly, second connection latch protrusions 412 are provided on both sides of the bottom rear side of the front frame plate 41. The front frame plate 41 connects to the frontmost battery press-assembly frame 2 through the engagement of the second connection latch protrusions 412 with the connection latch holes 241 of the frontmost battery press-assembly frame 2. As a result, the front and rear side surfaces of the battery 3 on the frontmost battery press-mounting frame 2 are pressed by the front frame plate 41 and the vertical frame plate 21 respectively.

[0060] The battery pack structure 200 is installed in the battery cavity 191 of the box body 1 by means of a battery press-fitting frame 2 which is set on a sliding rail 51. The vertical frame plate 21 of the rear end press-fitting frame 202 is close to the rear end plate 12 of the box body 1, and the intermediate press-fitting frames 201 are connected to each other one by one in a front-to-back order until they are connected to the front end frame plate 41. In this case, the front-to-back distance between the inner partition frame plate 15 and the rear end plate 12 must be greater than the length of the connection between the front end frame plate 41, the intermediate press-fitting frame 201 and the rear end press-fitting frame 202, thereby generating a margin gap in the length direction. To this end, in this embodiment, a pad plate 42 is set between the front end frame plate 41 and the inner partition frame plate 15 to fill the margin gap, thereby limiting the sliding of each battery press-fitting frame 2 on the slide rail 51, thereby fixing each battery press-fitting frame 2 and the batteries 3 on each battery press-fitting frame 2 on the slide rail 51. Refer to Figure 11 , insert pad board 42 front is provided with insert pad board card strip 421. Matchingly with insert pad board card strip 421, the back of inner spacer plate 15 is provided with insert pad board card slot 151. The insert pad board card strip 421 of insert pad board 42 is stuck in the insert pad board card slot 151 of inner spacer plate 15.

[0061] In addition, a plurality of pad ridges 422 are provided behind the insert plate 42. Thus, pad grooves 423 are formed between the pad ridges 422. The insert plate 42 is pressed against the front end frame plate 41 by the pad ridges 422. The pad grooves 423 between the pad ridges 422 are the operating space for the manipulator. During installation, the manipulator presses against the front end frame plate 41 toward the rear end, so that each buffer pad 43 is compressed, thereby leaving enough space between the front end frame plate 41 and the inner partition frame plate 15 to place the insert plate 42. After the insert plate 42 is placed in the space between the front end frame plate 41 and the inner partition frame plate 15, the released manipulator pulls it out through the operating space formed by the pad grooves 423. When the battery pack structure 200 is disassembled, the manipulator inserts into the operating space formed by the pad grooves 423, applies a pressure force to the front end frame plate 41 toward the rear, and then removes the insert plate 42.

[0062] The inserting plate 42 can be made of elastic material or non-elastic material. In this embodiment, the inserting plate 42 is preferably made of elastic material.

[0063] A heating plate 53 is installed between the two slide rails 51 of the battery pack structure 200. The heating plate 53 is preferably a PTC heater. The heating plate 53 is positioned within a heating plate retaining slot 141 on the bottom plate 14 of the housing 1 and secured to the bottom plate 14 via the retaining slot 141. The heating plate 53 is positioned in close contact with the horizontal frame 22 of the battery press-fit rack 2. The heating plate 53 is used to heat the batteries 3.

[0064] In this embodiment, the battery press-fitting frame 2 is made entirely of hard plastic, such as styrene resin or polyvinyl chloride. Considering the problem of insufficient thermal conductivity of the horizontal frame 22 made of hard plastic. In this embodiment, the horizontal frame 22 conducts heat to the battery 3 by providing a thermal pad 44. Specifically, a thermal pad groove 221 is provided on the top surface of the horizontal frame 22. A thermal pad hole 222 is provided in the thermal pad groove 221. The thermal pad 44 is provided in the thermal pad groove 221 of the horizontal frame 22. The thermal pad 44 is made of a thermally conductive silicone sheet, refer to Figure 9 , including a heat-conducting main plate 441 and a heat-conducting thickened plate 442. The heat-conducting silicone sheet is a heat-conducting medium material synthesized by a special process with silicone as the base material and various auxiliary materials such as metal oxides added, and is familiar to those skilled in the art. The size of the heat-conducting main plate 441 matches the thermal pad groove 221, and the size of the heat-conducting thickened plate 442 matches the thermal pad hole 222. The heat-conducting main plate 441 is stuck in the thermal pad groove 221 and the top surface of the heat-conducting main plate 441 is flush with the top surface of the horizontal frame plate 22. The heat-conducting thickened plate 442 passes through the thermal pad hole 222 and the bottom surface of the heat-conducting thickened plate 442 is flush with the bottom surface of the horizontal frame plate 22. As a result, the bottom surface of the heat-conducting thickened plate 442 is in close contact with the heating plate 53, and the heat-conducting main plate 441 is in close contact with the bottom surface of the battery 3. In the actual assembly of this embodiment, the heat-conducting pad 44 can be adhered to the heat-conducting pad groove 221 of the horizontal frame plate 22 by structural adhesive. The battery 3 is attached to the thermal pad 44 by means of a structural thermal conductive adhesive.

[0065] The top of the battery pack structure 200 is pressed by the pressure strip 61, and the battery pack structure 200 is pressed into the battery cavity 191 of the box body 1. There are two pressure strips 61. The two pressure strips 61 press the two sides of the top of the battery pack structure 200 respectively. Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 The vertical frame plate 21 of the battery press frame 2 is provided with first shoulder grooves 213 on both sides of the top, and second shoulder grooves 413 on both sides of the top of the front frame plate 41. The first shoulder groove 213 and the second shoulder groove 413 are stepped grooves on either side of the vertical frame plate 21 and the front frame plate 41, respectively, with their stepped surfaces flush with the top surface of the battery 3. The portion of the vertical frame plate 21 between the two first shoulder grooves 213 and the portion of the front frame plate 41 between the two second shoulder grooves 413 are higher than the top surface of the battery 3. The holding strips 61 are arranged on the upper channel formed by the first and second shoulder grooves 213 and 413 on both sides of the top of the battery pack structure 200, and press against the stepped surfaces of the first and second shoulder grooves 213 and 413 and the top surface of the battery 3. The two holding strips 61 thus laterally clamp the vertical frame plate 21 and the front frame plate 41.

[0066] A wire harness isolation plate 62 is provided between the two pressure strips 61 at the top of the battery pack structure 200. The wire harness isolation plate 62 is used for wire harness isolation. The wire harness isolation plate 62 is usually provided with a voltage and temperature acquisition board and a wiring for connecting the batteries 3 in series. The wire harness isolation plate 62 is provided with a pole hole 621 that matches the position of the battery pole 31 of the battery 3. The battery pole 31 of each battery 3 passes through the pole hole 621 of the wire harness isolation plate 62. In this embodiment, in order to make the wire harness isolation plate 62 more firmly engaged with the battery pack structure 200, refer to Figure 4 、 Figure 5 、 Figure 8 , the top of the vertical frame plate 21 of the middle press-fitting frame 201 is provided with a plurality of wire harness isolation plate clamping slots 214. Figure 12 The bottom of the wiring harness isolation plate 62 is provided with a frame plate clamping strip 622 that matches the wiring harness isolation plate clamping slot 214. Thus, the frame plate clamping strip 622 is clamped into the wiring harness isolation plate clamping slot 214, thereby achieving the clamping of the wiring harness isolation plate 62 and the battery pack structure 200.

[0067] In addition, further, in this embodiment, the pressure strip 61 and the harness isolation plate 62 are an integrated structure. Figure 12 and Figure 13 The beading 61 includes a beading sleeve 611 and a skeleton bar 613. The skeleton bar 613 is made of metal, usually an aluminum bar. The beading sleeve 611 and the wiring harness isolation plate 62 are made of the same insulating material. The beading sleeve 611, the skeleton bar 613 and the wiring harness isolation plate 62 are integrally formed through an injection molding process. The beading sleeve 611 is connected to both sides of the wiring harness isolation plate 62, and is provided with front and rear beading sleeve holes 612. The skeleton bar 613 is arranged in the beading sleeve hole 612 and is covered by the beading sleeve 611. The two ends of the skeleton bar 613 protrude from the beading sleeve 611 to form a beading connection part 614. A beading mounting hole 615 is provided on the beading connection part 614. Thus, the two ends of the beading 61 are respectively fixed to the box body 1 by the bolts provided in the beading mounting hole 615. Specifically, referring to Figure 10 A vertical first bead mounting post 161 is provided on the inner side of the rear end panel 12 of the housing 1, and a second bead mounting post 162 is provided on the front of the inner partition panel 15. The bead 61 is fixed to the housing 1 at both ends via bolts provided in the bead mounting holes 615 and bolt holes in the first and second bead mounting posts 161 and 162, respectively. The bead mounting hole 615 at one end of the bead 61 is preferably a waist-shaped hole, while the bead mounting hole 615 at the other end is a round hole.

[0068] It should be pointed out that, in the present embodiment, the pressure strip 61 and the wiring harness isolation plate 62 are an integrated structure. Those skilled in the art will understand that the pressure strip 61 and the wiring harness isolation plate 62 may also be separate independent components.

[0069] The battery pack of this embodiment is assembled using the following method:

[0070] Step S1: Install the slide rails 51 and the heating plate 53 on the bottom plate 14 of the box 1. Specifically, first, install a number of sliders 52 on the slide rails 51 equal to the number of batteries 3 in the battery pack structure 200. Then, fix the slide rails 51 to the slide rail mounting strips 142 of the bottom plate 14 with bolts. At the same time, place the heating plate 53 in the heating plate slot 141 of the bottom plate 14.

[0071] Step S2: Install each battery press-mounting rack 2 on the slider 52 with bolts. Specifically, the horizontal frame 22 of the battery press-mounting rack 2 is fixed to the slider 52 with bolts, so that each battery press-mounting rack 2 is set on two slide rails 51 and one slider 52, and the vertical frame 21 of each battery press-mounting rack 2 is located behind the horizontal frame 22.

[0072] Step S3: Install the components of the battery press frame 2 of the battery pack structure 200 one by one from the rear end to the front end. After each component on the battery press frame 2 is installed, a rearward pressure is applied to the battery press frame 2 with the completed component installed, causing the battery press frame 2 to slide backward, thereby inserting the first connection latch protrusion 242 at the rear end of the battery press frame 2 into the connection latch hole 241 at the front end of the adjacent battery press frame 2 at the rear. As a result, the battery press frame 2 is connected to each of the battery press frames 2 at the rear, and the vertical frame plate 21 of the rearmost rear press frame 202 is tightly attached to the rear end plate 12 of the box body 1. The components on the battery press frame 2 are the buffer pad 43, the thermal pad 44, and the battery 3. The installation of the components on the battery press frame 2 is specifically referred to the positional relationship between the buffer pad 43, the thermal pad 44, and the battery 3. This manual will not elaborate on this.

[0073] It should be noted that step S2 and step S3 can also be combined, that is: after each battery press-mounted frame 2 is installed on the slide rail 51, the buffer pad 43, the thermal pad 44 and the battery 3 are installed on the battery press-mounted frame 2. After the buffer pad 43, the thermal pad 44 and the battery 3 are installed, a rearward pressing force is applied to the battery press-mounted frame 2.

[0074] Step S4: After all the battery press-assembly frames 2 on the battery pack structure are installed, the buffer pad 43 is installed on the front frame plate 41. The second connection latch protrusion 412 on the front frame plate 41 is inserted into the connection latch hole 241 of the battery press-assembly frame 2 at the front end of the battery pack structure, so that the buffer pad 43 on the front frame plate 41 is tightly attached to the battery 3 on the battery press-assembly frame 2 at the front end of the battery pack structure.

[0075] Step S5: Press the front frame plate 41 backward so that the cushion pads 43 on the battery pack structure are compressed, and then insert the insert plate 42 between the front of the front frame plate 41 and the box body 1; then release the pressure of the front frame plate 41 so that the insert plate 42 is clamped between the front frame plate 41 and the box body 1.

[0076] Step S6: Install the holding strip 61 and the wiring harness isolation plate 62 on the battery pack structure 200, so that the holding strip 61 presses against the battery pack structure 200. In this embodiment, the holding strip 61 and the wiring harness isolation plate 62 are an integrated structure, that is, the integrated structure is installed on the top of the battery pack structure 200, and the ends of the holding strip 61 are fixed to the box body 1 with bolts.

[0077] It should be noted that in this embodiment, the thermal pad 44 is made of a thermally conductive silicone sheet. If the thermal pad 44 uses certain special thermally conductive materials with excellent thermal conductivity, the thermal pad 44 and the battery press-mount frame 2 can also be integrated into a single unit through an injection molding process. In this case, the thermal pad 44 does not need to be mounted on the battery press-mount frame 2; the components on the battery press-mount frame 2 are the cushion pad 43 and the battery 3.

[0078] Furthermore, in this embodiment, the heating plate 53 utilizes a PTC heater, which is used solely for heating the battery 3. Those skilled in the art will appreciate that the heating plate 53 may also utilize a liquid cooling plate or a heat exchange plate. Thus, the heating plate 53 can provide liquid cooling or liquid heating for the battery 3. In other words, the term "heating plate" in this invention is merely a noun and is not limited to a "heating" function.

Claims

1. A battery pack, characterized in that: The invention comprises a box body (1), a battery pack structure arranged in the box body (1), and a pressure strip (61) arranged on the battery pack structure; the pressure strip (61) is arranged on the top of the battery pack structure to press the battery pack structure in the box body (1); the battery pack structure comprises a battery pressing frame (2), a plurality of batteries (3) and a front frame plate (41); the battery pressing frame (2) comprises a vertical frame plate (21) and a horizontal frame plate (22); the vertical frame plate (21) is vertical, and the horizontal frame plate (22) is horizontal; the horizontal frame plate (22) is connected to the bottom end of the vertical frame plate (21), so that the vertical frame plate (21) and the horizontal frame plate (22) are connected. and forming an L-shaped structure; vertical side limiting plates (23) are provided on both sides of the horizontal frame plate (22); the battery (3) is a square battery, and its battery pole (31) is located on the top surface thereof; each battery (3) is respectively provided on the horizontal frame plate (22) of each battery pressing frame (2); a mechanism for providing a buffer pad is provided on the vertical frame plate (21), and a buffer pad (43) is provided through the mechanism, so that the battery (3) and the vertical frame plate (21) are separated by the buffer pad (43); a connection clamping hole (241) is provided on the front end surface of the horizontal frame plate (22), and a first connection clamping protrusion (242) is provided on the rear end surface; A second connection clamping protrusion (412) is provided at the bottom of the rear side surface of the front frame plate (41); thereby, the first connection clamping protrusion (242) of one battery pressing frame (2) is clamped into the connection clamping hole (241) of another battery pressing frame (2), thereby arranging the battery pressing frames (2) in a row and connecting them together; by engaging the connection clamping hole (241) of the frontmost battery pressing frame (2) with the second connection clamping protrusion (412) on the front frame plate (41), the frontmost battery pressing frame (2) is connected to the front frame plate (41); a mechanism for arranging a buffer pad is provided on the rear side surface of the front frame plate (41), and A buffer pad (43) is provided, thereby allowing the battery (3) on the frontmost battery pressing frame (2) to be separated from the front frame plate (41) by the buffer pad (43); the mechanism for providing the buffer pad on the vertical frame plate (21) is a frame plate hollow hole (212) on the vertical frame plate (21); the buffer pad (43) is stuck in the frame plate hollow hole (212); a slide rail (51) is provided on the bottom plate (14) of the box body (1); the horizontal frame plate (22) of the battery pressing frame (2) is provided on the slide rail (51) through a slider (52), so that the battery pressing frame (2) can slide in the front-rear direction on the slide rail (51).

2. The battery pack according to claim 1, wherein: An inserting plate (42) is provided between the front frame plate (41) of the battery pack structure and the box body (1), and each battery pressing frame (2) is fixed on the slide rail (51) through the inserting plate (42).

3. The battery pack according to claim 2, wherein: Each battery pack structure corresponds to two mutually parallel slide rails (51); a heating plate (53) is provided between the two slide rails (51) corresponding to the battery pack structures.

4. The battery pack according to claim 3, wherein: The battery pack structure further comprises a plurality of heat-conducting pads (44); a heat-conducting pad groove (221) is provided on the top surface of the horizontal frame plate (22); a heat-conducting pad hole (222) is provided in the heat-conducting pad groove (221); each heat-conducting pad (44) is respectively provided in the heat-conducting pad groove (221) of each battery press-mounting frame (2); The heat-conducting pad (44) includes a heat-conducting main body plate (441) and a heat-conducting thickening plate (442); The heat-conducting main body plate (441) is stuck in the heat-conducting pad groove (221), and the heat-conducting thickened plate (442) passes through the heat-conducting pad hole (222) and is closely attached to the heating plate (53); The heat-conducting body plate (441) is in close contact with the bottom surface of the battery (3).

5. The battery pack according to any one of claims 1 to 4, wherein: The two ends of the pressure strip (61) are fixedly connected to the box body (1) by means of bolt connection; first shoulder grooves (213) are provided on both sides of the top of the vertical frame plate (21) of the battery pressing frame (2); second shoulder grooves (413) are provided on both sides of the top of the front frame plate (41); the two pressure strips (61) are respectively provided on the upper channels formed by the first shoulder grooves (213) and the second shoulder grooves (413) on both sides of the top of the battery pack structure, so that the two pressure strips (61) laterally clamp the vertical frame plate (21) and the front frame plate (41).

6. The battery pack according to claim 5, wherein: The invention also includes a wiring harness isolation plate (62) arranged on the top of the battery pack structure; the wiring harness isolation plate (62) is located between two pressure strips (61); the pressure strip (61) includes a pressure strip sleeve (611) and a skeleton bar (613) arranged in the pressure strip sleeve (611); the pressure strip (61) is fixedly connected to the box body (1) through bolts provided in pressure strip mounting holes (615) at both ends of the skeleton bar (613).

7. The battery pack according to claim 6, wherein: The battery pressing frame (2) located at the rear end of the battery pack structure is a rear pressing frame (202), and the other battery pressing frames (2) are intermediate pressing frames (201); the vertical frame plate (21) of the rear pressing frame (202) is in close contact with the inner side surface of the rear end plate (12) of the box body (1); the top of the vertical frame plate (21) of the intermediate pressing frame (201) is provided with a plurality of wire harness isolation plate clamping slots (214); the bottom of the wire harness isolation plate (62) is provided with a frame plate clamping strip (622) matching the wire harness isolation plate clamping slot (214); the frame plate clamping strip (622) is clamped into the wire harness isolation plate clamping slot (214).

8. The battery pack structure according to claim 7, wherein: The mechanism for arranging the buffer pad on the vertical frame plate (21) is a buffer pad groove (211) arranged on the front and rear sides of the vertical frame plate (21); the buffer pad (43) is respectively clamped in the buffer pad groove (211) on the front and rear sides and is closely attached to the vertical frame plate (21).

9. A battery pack assembly method, characterized in that: The assembly method is used for assembling the battery pack as claimed in claim 1; the assembly method comprises the following steps: S1: Installing a slide rail (51) and a heating plate (53) on the bottom plate of the box (1), and installing a slider (52) on the slide rail (51); S2: Install each battery press-fitting frame (2) on the slider (52) by means of bolts; S3: installing the components on the battery press-mounting frame (2) of the battery pack structure one by one from the rear end to the front end, and after completing the installation of each component on the battery press-mounting frame (2), applying a backward pressing force to the battery press-mounting frame (2) with the completed component installed, so that the battery press-mounting frame (2) slides backward, thereby inserting the first connection clamping protrusion (242) at the rear end of the battery press-mounting frame (2) into the connection clamping hole (241) at the front end of the adjacent battery press-mounting frame (2) at the rear; the components on the battery press-mounting frame (2) include a buffer pad (43) and a battery (3); S4: After all the battery press-fitting frames (2) on the battery pack structure are installed, a buffer pad (43) is installed on the front frame plate (41), and then the second connection clamping protrusion (412) on the front frame plate (41) is inserted into the connection clamping hole (241) of the battery press-fitting frame (2) at the front end of the battery pack structure, so that the buffer pad (43) on the front frame plate (41) is closely attached to the battery (3) on the battery press-fitting frame (2) at the front end of the battery pack structure; S5: Pressing the front frame plate (41) backwards so that each buffer pad (43) on the battery pack structure is compressed, and then inserting the inserting pad (42) between the front of the front frame plate (41) and the box body (1); then releasing the pressing force of the front frame plate (41) so that the inserting pad (42) is clamped between the front frame plate (41) and the box body (1); S6: Installing a holding strip (61) on the battery pack structure so that the holding strip (61) presses the battery pack structure.

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