CTP battery case and CTP battery system

Abstract

A CTP battery case and a CTP battery system. The CTP battery case comprises a bottom plate (1) and a plurality of side plates (2), wherein the side plates (2) are connected to the bottom plate (1), and adjacent side plates (2) are connected to each other to form a mounting space (3); an adhesive bonding groove (4) is formed in the side of the bottom plate (1) close to the mounting space (3); an insulating layer (5) covers the adhesive bonding groove (4), and the insulating layer (5) is provided with a through hole (6) adapted to an opening of the adhesive bonding groove (4); an adhesive bonding member (7) is provided in the adhesive bonding groove (4), and the adhesive bonding member (7) passes through the through hole (6); the insulating layer (5) isolates the bottom plate (1) from a battery cell (10); the adhesive bonding member (7) is bonded to the battery cell (10); and the adhesive bonding member (7) is a structural member made of an insulating material.

Description

CTP battery box and CTP battery system

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on March 26, 2024, with application number 202410352390.2. The entire contents of the above application are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of battery technology, and in particular to a CTP battery box and a CTP battery system. Background Art

[0003] The CTP battery system adopts a module-free structure. The bottom of the battery is directly fixed to the box by gluing, and the battery cell is directly bonded to the bottom plate (or side plate) of the battery box. In order to improve the insulation of the battery cell, it is usually necessary to wrap a layer of insulating film around the periphery of the battery cell. The insulating film (blue film) is usually a roll material, and its structure is similar to that of tape. One surface of the insulating film is sticky so that it can be bonded to the battery cell shell. The other surface of the insulating film usually contains a certain amount of silicone oil to facilitate the peeling of the insulating film from the roll material. Technical issues

[0004] Battery cells that are completely covered with insulating film are difficult to be firmly fixed on the casing due to the presence of silicone oil on the surface. When the battery pack is impacted, the battery cells are easily detached from the casing due to insufficient bonding strength between the battery cells and the battery casing, causing failure of the battery module. If the battery cells are not fully enclosed, for example, there is no insulating film at the bottom of the battery cells and the insulating film is only wrapped around the battery casing, the insulation performance between the battery cells and the casing will be reduced, and the insulation requirements cannot be met. Technical Solutions

[0005] In the first aspect, the present application provides a CTP battery box, comprising a bottom plate and multiple side plates, the side plates are connected to the bottom plate, and adjacent side plates are connected to each other to form an installation space; a bonding groove is opened on the side of the bottom plate close to the installation space, the bonding groove is covered with an insulating layer, the insulating layer is provided with a through hole adapted to the bonding groove, a bonding member is provided in the bonding groove, the bonding member passes through the through hole, the insulating layer can isolate the bottom plate and the battery cell, the bonding member is used to bond the battery cell, and the bonding member is an insulating material structural member.

[0006] In a second aspect, the present application provides a CTP battery system, including the CTP battery box provided in the present application, and also including a battery cell, the battery cell including a side surface and a bottom surface, the side surface of the battery cell is covered with an insulating film, the adhesive member bonds the battery cell to the adhesive groove, the bottom surface of the battery cell abuts the insulating layer, or the bottom surface and the side surface of the battery cell both abut the insulating layer. Beneficial effects

[0007] The beneficial effects of the CTP battery box provided by the present application are as follows: by arranging a bonding groove on the bottom plate, arranging a bonding member in the bonding groove, and bonding the bonding member to the battery cell so that the battery cell and the bottom plate are fixedly connected, the connection firmness of the battery cell and the bottom plate is ensured; in order to improve the insulation performance between the battery cell and the bottom plate, an insulating layer is arranged on the bottom plate, and a through hole adapted to the bonding groove is provided in the insulating layer so that the bonding member can pass through the through hole to connect the battery cell and the bonding groove, the battery cell abuts against the insulating layer without direct contact with the bottom plate, and the bonding member bonds the battery cell and the bottom plate so that the battery cell is firmly fixed; the bonding member passes through the through hole so that The battery cell is in contact with the bottom plate, which ensures the insulation performance between the battery cell and the battery box while achieving the fixation of the battery cell; the adhesive joint is a structural member with certain insulation performance; when the battery cell is set in the installation space, the surface of the battery cell in contact with the insulation layer does not need to be covered with an insulation layer, and the battery cell and the bottom plate can be isolated by the insulation layer on the bottom plate. The exposed part of the battery cell is glued to the bottom plate through the adhesive joint, so that the battery cell and the bottom plate have good insulation performance, and the battery cell can be firmly fixed on the bottom plate, thereby improving the overall insulation and shock resistance of the battery box and ensuring the safe use of the battery box.

[0008] The beneficial effects of the CTP battery system provided by the present application are as follows: the sides of the battery cell are fully or partially covered with an insulating film, and the bottom of the battery cell is not insulated; when the sides of the battery cell are fully covered with an insulating film, the bottom surface of the battery cell abuts against the insulating layer, and the adhesive bonded the battery cell to the adhesive groove; when the sides of the battery cell are partially covered with an insulating film, the bottom surface of the battery cell and the side not covered with the insulating film abut against the insulating layer, and the battery cell and the adhesive groove are bonded by the adhesive bond; the insulating film and the insulating layer together form an insulating isolation for the battery cell to prevent the battery cell from contacting the bottom plate; the battery cell is fixed by the adhesive bond to ensure that the battery cell is firmly connected to the battery box to prevent the battery cell from being separated from the bottom plate due to external force; the CTP battery system of the present application has a stable battery cell structure inside the battery box and a firm connection between the battery cell and the battery box , the battery cell has strong insulation performance, so that the CTP battery system takes into account both seismic resistance and insulation performance; by arranging a bonding groove and an insulating layer on the bottom plate, and setting the battery cell to be partially covered with an insulating film, when the battery cell is fixed on the bottom plate, the part of the battery cell not covered with the insulating film abuts against the insulating layer, and the insulating layer and the insulating film jointly form an insulation isolation for the battery cell; by arranging a through hole on the insulating layer, the through hole can be adapted to be connected with the bonding groove, and the bonding piece arranged in the bonding groove passes through the through hole and is bonded to the part of the battery cell not covered with the insulating film, so that the battery cell is firmly connected to the bottom plate; a CTP battery system of the present application takes into account both insulation performance and bonding strength of the battery cell, so that the CTP battery system is safer and more reliable when used, and has good economic value and practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] FIG1 is a schematic structural diagram of a CTP battery box provided in this application;

[0010] FIG2 is a schematic structural diagram of a CTP battery box bottom plate and an insulating film provided by the present application;

[0011] FIG3 is a schematic cross-sectional view of the insulating layer of Example 1 of the present application;

[0012] FIG4 is a schematic cross-sectional view of the bottom plate of Example 1 of the present application;

[0013] FIG5 is a schematic cross-sectional view of the bottom plate in use according to Example 1 of the present application;

[0014] FIG6 is a schematic cross-sectional view of the bottom plate of Example 2 of the present application;

[0015] FIG7 is a schematic cross-sectional view of the bottom plate of Example 2 of the present application in use;

[0016] FIG8 is a schematic cross-sectional view of the bottom plate of Example 4 of the present application;

[0017] FIG9 is a schematic cross-sectional view of the bottom plate in use according to Example 4 of the present application;

[0018] FIG10 is a schematic cross-sectional view of the bottom plate of Example 5 of the present application in use;

[0019] FIG11 is a schematic structural diagram of an insulating film according to Example 6 of the present application;

[0020] FIG12 is a schematic structural diagram of the insulating film of Example 7 of the present application.

[0021] icon:

[0022] 1- bottom plate, 2- side plate, 3- installation space, 4- gluing groove, 5- insulation layer, 6- through hole, 7- gluing part, 8- installation groove, 9- liquid cooling channel, 10- battery cell, 11- insulation film, 51- protrusion. Modes for Carrying Out the Invention

[0023] Example 1

[0024] The CTP battery box shown in Figures 1 to 5 includes a bottom plate 1 and multiple side plates 2. The side plates 2 are connected to the bottom plate 1, and adjacent side plates 2 are connected to each other to form an installation space 3. A bonding groove 4 is opened on the side of the bottom plate 1 close to the installation space 3. The bonding groove 4 is covered with an insulating layer 5. The insulating layer 5 is provided with a through hole 6 adapted to the notch of the bonding groove 4. A bonding member 7 is provided in the bonding groove 4. The bonding member 7 passes through the through hole 6. The insulating layer 5 can isolate the bottom plate 1 and the battery cell 10. The bonding member 7 is used to bond the battery cell 10. The bonding member 7 is an insulating material structural member.

[0025] Specifically, the bottom plate 1 defines a mounting groove 8 for positioning a battery cell 10. A bonding groove 4 is defined within the mounting groove 8, and an insulating layer 5 is disposed within the mounting groove 8. The mounting groove 8 positions the battery cell 10, preventing horizontal displacement of the battery cell 10 and securing the battery cell 10. This strengthens the bottom plate 1's ability to secure the battery cell 10 and enhances the battery box's shock resistance.

[0026] Specifically, the battery box is a rectangular box, and the bottom plate 1 and the top plate of the battery box are both rectangular plates. Four side panels 2 are adapted to be arranged on the four sides of the bottom plate 1, so that one side of the side panel 2 is connected to the bottom plate 1, and adjacent side panels 2 are connected to each other, so that the side panels 2 and the bottom plate 1 together enclose an installation space 3 for the battery cell 10, and the four sides of the rectangular top plate are detachably connected to the four side panels 2, so that the battery cell 10 is conveniently installed in the installation space 3; the bottom plate 1 and the side panel 2 are sealed at the connection, and the connection between adjacent side panels 2 is sealed to ensure the sealing performance of the battery box; the safety of the battery cell 10 in the battery box is ensured.

[0027] Specifically, the insulating layer 5 is a polypropylene film that is adapted to the shape of the base plate 1. The polypropylene film is a membrane-like structural member with good insulating properties. An adhesive surface is provided on one side of the polypropylene film, and the polypropylene film is adhered to the base plate 1 through the adhesive surface, so that the board surface of the base plate 1 located on the side of the installation space 3 is completely covered by the polypropylene film, which can better isolate the battery cell 10 and ensure the insulation performance between the battery cell 10 and the base plate 1; at least one protrusion 51 is provided on the polypropylene film, and the arrangement position of the protrusion 51 on the polypropylene film is adapted to the arrangement position of the installation groove 8 on the base plate 1, so that when the polypropylene film is attached to the base plate 1, the protrusion 51 is sunken into the installation groove 8, the shape of the protrusion 51 is adapted to the installation groove 8, and the protrusion 51 is attached to the inner wall of the installation groove 8; a through hole 6 is provided on the protrusion 51, and by providing an adhesive member 7 in the through hole 6, the adhesive member 7 can connect the base plate 1 to the battery cell 10, thereby ensuring the connection strength between the battery cell 10 and the base plate 1.

[0028] Specifically, the multiple mounting grooves 8 provided on the base plate 1 are arranged in an array, so that the battery cells 10 provided on the base plate 1 are arranged in an array. The spacing between adjacent battery cells 10 is controlled by the spacing between adjacent mounting grooves 8, ensuring that each battery cell 10 can be installed in the correct position on the base plate 1, avoiding the battery cell 10 from being squeezed, and ensuring good heat dissipation of the battery cell 10.

[0029] Specifically, a gluing groove 4 is provided at the bottom of the mounting groove 8, and the through hole 6 provided on the raised portion 51 is aligned and connected with the notch of the gluing groove 4. The gluing groove 4 is located in the middle of the bottom of the groove, and the notch shape of the gluing groove 4 is the same as the notch shape of the mounting groove 8, thereby ensuring that the gluing member 7 can be glued to the center position of the bottom of the battery cell 10, so that the battery cell 10 can maintain a good connection with the base plate 1 when subjected to forces in all directions, thereby preventing the battery cell 10 from falling out of the mounting groove 8; and enhancing the firmness between the battery cell 10 and the base plate 1.

[0030] Specifically, the opening area of ​​the through hole 6 is smaller than the bottom area of ​​the mounting groove 8. When the battery cell 10 is arranged in the mounting groove 8, a polypropylene film is sandwiched between the battery cell 10 and the bottom of the groove; the bottom of the battery cell 10 and the bottom of the groove are connected by the adhesive 7, so that the opening area of ​​the through hole 6 is smaller than the bottom area of ​​the mounting groove 8, and the opening area of ​​the through hole 6 is smaller than the bottom area of ​​the battery cell 10; the opening area of ​​the through hole 6 is at least one-half of the bottom area of ​​the battery cell 10. When the battery cell 10 is placed in the mounting groove 8, part of the bottom edge of the bottom surface of the battery cell 10 abuts against the polypropylene film, and the polypropylene film isolates the battery cell 10 from the bottom plate 1. The larger the area of ​​the through hole 6, the more firmly the battery cell 10 is bonded to the adhesive groove 4.

[0031] Specifically, the adhesive component 7 is a structural adhesive made of epoxy resin. The structural adhesive is poured into the adhesive groove 4, and the structural adhesive passes through the through hole 6, so that the structural adhesive bonds the battery cell 10 to the adhesive groove 4; after the structural adhesive solidifies, the bottom surface of the battery cell 10 can maintain contact with the polypropylene film, and the battery cell 10 can be limited and fixed in the installation groove 8; the battery cell 10 is limited in the horizontal direction by the installation groove 8, and the structural adhesive limits the battery cell 10 in the vertical direction, making it difficult for the battery cell 10 to fall out of the installation groove 8, and making it difficult for the battery cell 10 to move in the installation space 3, thereby improving the seismic resistance of the battery box.

[0032] Specifically, a liquid cooling channel 9 is provided on the bottom plate 1 of the battery box. The liquid cooling channel 9 passes through the bottom plate 1 along the length direction or the width direction of the bottom plate 1, and the liquid cooling channel 9 does not interfere with the installation groove 8, ensuring that the installation space 3 is a closed space to avoid leakage of the coolant; the liquid cooling channel 9 is a channel with a rectangular cross-sectional area, and multiple liquid cooling channels 9 are equidistantly arranged on the bottom plate 1, and adjacent channels are parallel to each other. The channels are evenly arranged on the bottom plate 1, so that any position on the bottom plate 1 can dissipate heat through the liquid cooling channel 9. The coolant is introduced into the liquid cooling channel 9 at one end and discharged from the other end. The flow of the coolant takes away the heat generated by the battery cells 10 in the installation space 3, so that the battery box can maintain a stable operating temperature environment.

[0033] Specifically, the polypropylene film is 0.15mm thick, and the structural adhesive is 2mm thick. The 2mm thickness of the structural adhesive ensures a secure bond between the battery cell and the baseplate, while also ensuring insulation between the two. While ensuring adhesion, the structural adhesive can be less than 2mm thick; the thinner the structural adhesive, the less impact it has on insulation. The polypropylene film can be even thinner while ensuring insulation performance; thinner polypropylene films are more conducive to material savings during production. In one embodiment, the polypropylene film is 0.1mm thick, and the structural adhesive is 1mm thick.

[0034] In this embodiment, the bottom plate 1 and the side plate 2 are integrally formed structural members, thereby ensuring the sealing performance of the installation space 3 of the battery box and making the battery cells 10 installed in the installation space 3 safer.

[0035] In this embodiment, the insulating layer 5 may also be made of polycarbonate and polyester resin materials.

[0036] In this embodiment, the shape of the mounting groove 8 is a rectangular groove adapted to the battery core 10 ; the gluing groove 4 is a rectangular groove.

[0037] When the CTP battery box of this embodiment is used, the structural glue is injected into the bonding groove 4 through the through hole 6, and then the battery cell 10 is placed. The battery cell 10 is pressed down until the bottom surface of the battery cell 10 abuts against the polypropylene film, so that the structural glue passes through the through hole 6 and is bonded to the bottom of the battery cell 10. The structural glue is then allowed to solidify naturally, and the structural glue fixes the battery cell 10 in the installation groove 8; the battery cell 10 is repeatedly installed until all the installation grooves 8 on the bottom plate 1 are installed with the battery cell 10. After the installation is completed, the top is connected to the side plate 2; by opening the installation groove 8 on the bottom plate 1 of the battery box, the installation groove 8 and the battery cell 10 are connected. The bottom of the battery cell 10 is adapted to fit the battery cell 10. When the battery cell 10 is installed in the installation groove 8, the battery cell 10 can be clamped on the bottom plate 1, thereby limiting the battery cell 10 and enhancing the connection strength between the battery cell 10 and the bottom plate 1; an insulating layer 5 is attached to the installation groove 8, and the insulating layer 5 can enhance the insulation performance between the battery cell 10 and the battery box; a through hole 6 is provided in the insulating layer 5, and an adhesive member 7 is provided in the through hole 6. The adhesive member 7 passes through the through hole 6, so that one end of the adhesive member 7 is connected to the battery cell 10 and the other end is connected to the battery box bottom plate 1, so that the battery cell 10 is firmly fixed in the battery box.

[0038] In the CTP battery box of this embodiment, the battery cells 10 arranged in the battery box are isolated from the base plate 1 by an insulating layer 5; the mounting grooves 8 opened on the base plate 1 can limit the battery cells 10, and further, the adhesive members 7 arranged in the through holes 6 glue the base plate 1 and the battery cells 10 to fix them; thereby, the battery cells 10 in the battery box can be firmly fixed while ensuring the insulation performance of the battery box.

[0039] Example 2

[0040] The structure of the CTP battery box shown in FIG6-FIG7 is substantially the same as that of the embodiment 1. The difference from the embodiment 1 is that the mounting groove 8 is not provided on the bottom plate 1.

[0041] Specifically, the insulating layer 5 is not provided with the protrusion 51 , and the insulating layer 5 is laid on the bottom plate 1 .

[0042] Specifically, the insulating layer 5 is provided with a plurality of through holes 6 adapted to the gluing grooves 4 . When the insulating layer 5 is laid on the base plate 1 , each opening is aligned with and communicates with the notch of the gluing grooves 4 .

[0043] When using the CTP battery box of this embodiment, the bottom of the battery cell 10 is aligned with the adhesive groove 4 so that the bottom of the battery cell 10 blocks the adhesive groove 4, the edge of the bottom of the battery cell 10 abuts against the insulating layer 5, and the middle of the battery cell 10 is connected to the adhesive 7, so that the battery cell 10 is fixed on the base plate 1.

[0044] The CTP battery box of this embodiment is provided with a bonding groove 4 on the bottom plate 1, a bonding member 7 is provided in the bonding groove 4, and the bonding member 7 is bonded to the battery cell 10 so that the battery cell 10 is fixedly connected to the bottom plate 1, thereby ensuring the firmness of the connection between the battery cell 10 and the bottom plate 1; in order to improve the insulation performance between the battery cell 10 and the bottom plate 1, an insulating layer 5 is provided on the bottom plate 1, and a through hole 6 is provided in the insulating layer 5 to match the bonding groove 4, so that the bonding member 7 can pass through the through hole 6 to connect the battery cell 10 and the bonding groove 4, and the battery cell 10 abuts against the insulating layer 5 without direct contact with the bottom plate 1, and the bonding member 7 bonds the battery cell 10 to the bottom plate 1, so that the battery cell 10 is firmly fixed; the bonding member 7 passes through the through hole 6 so that The battery cell 10 is in contact with the base plate 1, which ensures the insulation performance between the battery cell 10 and the battery box while fixing the battery cell 10; the adhesive joint 7 is a structural member with certain insulation performance; when the battery cell 10 is arranged in the installation space 3, the surface of the battery cell 10 in contact with the insulation layer 5 does not need to be covered with the insulation layer 5, and the battery cell 10 and the base plate 1 can be isolated by the insulation layer 5 on the base plate 1. The exposed part of the battery cell 10 is glued to the base plate 1 through the adhesive joint 7, so that the battery cell 10 and the base plate 1 have good insulation performance, and the battery cell 10 can be firmly fixed on the base plate 1, thereby improving the overall insulation and shock resistance of the battery box and ensuring the safe use of the battery box.

[0045] Example 3

[0046] The structure of the CTP battery box of this embodiment is roughly the same as that of Example 1. The difference from Example 1 is that the bottom plate 1 of the CTP battery box is a circular plate, and the side wall of the CTP battery box is a cylindrical structural member, and the circular plate is adapted to the cylindrical structural member.

[0047] Specifically, the installation groove 8 and the gluing groove 4 are both cylindrical grooves, and the depth of the gluing groove 4 is 1 mm.

[0048] The CTP battery box of this embodiment has a cylindrical body. In some embodiments, the body can also be constructed as other body forms that can accommodate the battery cells 10. The shapes of the mounting grooves 8 and the gluing grooves 4 are both cylindrical, suitable for the installation and fixation of the cylindrical battery cells 10. In some embodiments, the shapes of the mounting grooves 8 and the gluing grooves 4 can be changed according to the different shapes of the battery cells 10 to facilitate the installation and fixation of the battery cells 10.

[0049] Example 4

[0050] The structure of the CTP battery box shown in Figures 8 and 9 is substantially the same as that of Example 1. The difference from Example 1 is that the insulating layer 5 is a concave film with the same shape as the mounting groove 8.

[0051] Specifically, the concave membrane is only attached to the bottom and side walls of the installation groove 8 .

[0052] Specifically, a concave membrane is independently provided in each installation groove 8 .

[0053] In the CTP battery box of this embodiment, a concave film is independently provided in each mounting groove 8 , which can save the material usage of the insulating layer 5 while ensuring the insulation performance of the battery cell 10 .

[0054] Example 5

[0055] The structure of the CTP battery box shown in FIG10 is substantially the same as that of Example 1. The difference from Example 1 is that the gluing groove 4 is provided on the side wall of the mounting groove 8 .

[0056] Specifically, four gluing grooves 4 are provided, and the four gluing grooves 4 are respectively provided on the four side walls of the rectangular installation groove 8 .

[0057] The CTP battery box of this embodiment is bonded to the side walls of the battery cell 10 by the adhesive member 7, thereby fixing the battery cell 10; the four side surfaces of the battery cell 10 are all bonded, so that the battery cell 10 is firmly fixed in the installation groove 8.

[0058] Example 6

[0059] The CTP battery system shown in Figure 11 includes the CTP battery box of Example 1, and also includes a battery cell 10. The battery cell 10 includes a side surface and a bottom surface. The side surface of the battery cell 10 is covered with an insulating film 11. The adhesive 7 bonds the battery cell 10 to the adhesive groove 4. The bottom surface of the battery cell 10 abuts the insulating layer 5, or the bottom surface of the battery cell 10 and the side surface of the battery cell 10 both abut the insulating layer 5.

[0060] Specifically, a mounting groove 8 is provided on the base plate 1, and the side surface of the battery cell 10 is partially covered with an insulating film 11, so that the side surface of the battery cell 10 near the bottom is exposed. When the bottom of the battery cell 10 is adapted to be embedded in the mounting groove 8, the insulating mold abuts against the insulating layer 5, so that the side surface and bottom surface of the battery cell 10 are covered by the insulating layer 5 and the insulating mold, thereby ensuring the insulation performance.

[0061] Specifically, the through hole 6 is located in the middle of the bottom surface, and the opening area of ​​the through hole 6 is smaller than the bottom area of ​​the battery cell, and the opening area of ​​the through hole 6 is at least half of the bottom area of ​​the battery cell. The opening area of ​​the through hole 6 is smaller than the bottom area of ​​the battery cell 10, ensuring that when the battery cell 10 is installed, the bottom surface of the battery cell 10 is abutted by the insulating layer 5, avoiding direct contact between the battery cell 10 and the base plate 1, thereby ensuring insulation performance; the larger the opening area of ​​the through hole 6, the larger the bonding area between the battery cell 10 and the structural adhesive, and the stronger the bonding between the battery cell 10 and the base plate 1; the opening area of ​​the through hole 6 is at least half of the bottom area of ​​the battery cell 10, ensuring that the battery cell 10 and the base plate 1 are firmly bonded.

[0062] In the CTP battery system of this embodiment, the side of the battery cell 10 is fully or partially covered with the insulating film 11, and the bottom of the battery cell 10 is not insulated; when the side of the battery cell 10 is fully covered, the bottom surface of the battery cell 10 abuts against the insulating layer 5, and the battery cell 10 is bonded to the bonding groove 4 by the adhesive 7; when the side of the battery cell 10 is partially covered with the insulating film 11, the bottom surface of the battery cell 10 and the side not covered with the insulating film 11 abut against the insulating layer 5, and the battery cell 10 is bonded to the bonding groove 4 by the adhesive 7; the insulating film 11 and the insulating layer 5 together form an insulating isolation layer for the battery cell 10; the battery cell 10 is fixed by adhesive. The battery cell 10 is ensured to be firmly connected to the battery box, so that the battery cell 10 is difficult to separate from the bottom plate 1 when subjected to external force, thereby improving the stability of the battery cell 10; the battery cell 10 is isolated by the insulating layer 5 and the insulating film 11, avoiding direct contact between the battery cell 10 and the bottom plate 1 of the CTP battery box, thereby ensuring the insulation performance between the battery cell 10 and the battery box; the CTP battery system of this embodiment has a stable structure of the battery cell 10 inside the battery box, a firm connection between the battery cell 10 and the battery box, and strong insulation performance of the battery cell 10, so that the CTP battery system has both seismic resistance and insulation performance.

[0063] Example 7

[0064] The CTP battery system shown in Figure 12 includes the CTP battery box of Example 2, and also includes a battery cell 10. The battery cell 10 includes a side surface and a bottom surface. The side surface of the battery cell 10 is covered with an insulating film 11. The adhesive 7 bonds the battery cell 10 to the adhesive groove 4. The bottom surface of the battery cell 10 abuts the insulating layer 5, or the bottom surface of the battery cell 10 and the side surface of the battery cell 10 both abut the insulating layer 5.

[0065] Specifically, the side surfaces of the battery cell 10 are completely covered by the insulating film 11 , and only the bottom surface of the battery cell 10 is exposed. When the battery cell 10 is mounted on the base plate 1 , the insulating film 11 abuts against the insulating layer 5 , thereby ensuring the insulation performance of the battery cell 10 .

Claims

1. A CTP battery box, comprising a bottom plate (1) and a plurality of side plates (2), wherein the side plates (2) are connected to the bottom plate (1), and adjacent side plates (2) are connected to each other to form an installation space (3); a bonding groove (4) is provided on a side of the bottom plate (1) close to the installation space (3), the bonding groove (4) is covered with an insulating layer (5), the insulating layer (5) is provided with a through hole (6) adapted to the bonding groove (4), a bonding member (7) is provided in the bonding groove (4), the bonding member (7) passes through the through hole (6), the insulating layer (5) can isolate the bottom plate (1) and the battery cell (10), the bonding member (7) is used for bonding the battery cell (10), and the bonding member (7) is an insulating material structural member.

2. The CTP battery box according to claim 1, wherein: The bottom plate (1) is provided with a mounting groove (8), the mounting groove (8) being capable of positioning the battery core (10), the gluing groove (4) being provided in the mounting groove (8), and the insulating layer (5) being provided in the mounting groove (8).

3. The CTP battery box according to claim 2, wherein: The gluing groove (4) is opened at the groove bottom of the installation groove (8), and the opening area of ​​the through hole (6) is smaller than the area of ​​the groove bottom.

4. The CTP battery box according to claim 2, wherein: The insulating layer (5) comprises a membrane-like structural member adapted to the base plate (1), and the membrane-like structural member is laid on the base plate (1); the membrane-like structural member is provided with a plurality of protrusions (51) adapted to the mounting grooves (8), and each of the protrusions (51) is provided with the through hole (6).

5. The CTP battery box according to claim 2, wherein: The gluing groove (4) is arranged on the side wall of the installation groove (8).

6. The CTP battery box according to claim 1, wherein: The adhesive member (7) is a structural adhesive, and the thickness of the structural adhesive is less than or equal to 2 mm.

7. The CTP battery box according to claim 1, wherein: An adhesive member is provided on one side of the insulating layer (5), the adhesive member is bonded to the base plate (1), and the thickness of the insulating layer (5) is less than or equal to 0.15 mm.

8. The CTP battery box according to claim 1, wherein: The base plate (1) is provided with a plurality of liquid cooling channels (9), and the liquid cooling channels (9) run through the base plate (1).

9. The CTP battery box according to any one of claims 1 to 8, further comprising a top plate, wherein the top plate is adapted to cover the opening of the installation space (3), and the top plate is detachably connected to the side plate (2).

10. A CTP battery system, comprising a CTP battery box according to claim 9, and further comprising a battery cell (10), wherein the battery cell (10) comprises a side surface and a bottom surface, the side surface of the battery cell (10) is covered with an insulating film (11), the adhesive member (7) bonds the battery cell (10) to the adhesive groove (4), the bottom surface of the battery cell (10) abuts the insulating layer (5), or the bottom surface of the battery cell (10) and the side surface of the battery cell (10) both abut the insulating layer (5).

11. The CTP battery system according to claim 10, wherein: The adhesive member (7) is connected to the middle of the bottom surface of the battery core (10), the opening area of ​​the through hole (6) is smaller than the bottom surface area of ​​the battery core (10), and the opening area of ​​the through hole (6) is at least half of the bottom surface area.

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