CTP battery box and CTP battery system

Abstract

The utility model relates to the field of CTP batteries, in particular to a CTP battery box and a CTP battery system, the CTP battery box comprises a bottom plate and a plurality of side plates, the side plates are connected with the bottom plate, and adjacent side plates are mutually connected to form a mounting space; a gluing groove is formed in one side, close to the mounting space, of the bottom plate, an insulating layer covers the gluing groove, a through hole matched with a notch of the gluing groove is formed in the insulating layer, a gluing piece is arranged in the gluing groove, the gluing piece penetrates through the through hole and the insulating layer to isolate the bottom plate and the battery cell, the gluing piece is used for gluing the battery cell, and the gluing piece is an insulating material structural piece; according to the CTP battery system, the insulation performance is guaranteed through the insulation film and the insulation layer, the battery cell is connected with the insulation layer in an abutting mode, the battery cell can be fixedly connected with the bottom plate in a cementing mode through cooperation of the cementing groove and the through hole, the insulation performance of the battery cell and the bottom plate is guaranteed, meanwhile, the connection strength of the battery cell and the bottom plate is guaranteed, and the CTP battery system is safer.

Description

Technical Field

[0001] The utility model relates to the field of CTP batteries, in particular to a CTP battery box and a CTP battery system. Background Art

[0002] 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 outer periphery of the battery cell. The insulating film (blue film) is usually a roll material, and its structure is similar to that of a tape. One surface of the insulating film is sticky so that it can be bonded to the battery cell shell, and 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.

[0003] However, 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, resulting in failure of the battery module. If the battery cells are not fully covered, for example, no insulating film is provided at the bottom of the battery cells and only the insulating film is 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.

[0004] Therefore, there is an urgent need for a technical solution to solve the technical problem that the battery cells of the current CTP battery pack cannot take into account both insulation performance and bonding firmness. Utility Model Content

[0005] The purpose of the utility model is to provide a CTP battery box and a CTP battery system in view of the technical problem that the battery cells of the current CTP battery pack cannot have both insulation performance and bonding firmness.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A CTP battery box comprises a bottom plate and a plurality of side plates, wherein 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 provided on a 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.

[0008] The CTP battery box of the utility model is provided with a glue groove on the bottom plate, a glue joint piece is provided in the glue groove, and the battery cell and the bottom plate are fixedly connected by bonding the glue joint piece with the battery cell, thereby ensuring the connection firmness between the battery cell and the bottom plate; in order to improve the insulation performance between the battery cell and the bottom plate, an insulating layer is provided on the bottom plate, and a through hole adapted to the glue groove is provided in the insulating layer, so that the glue joint piece can pass through the through hole to connect the battery cell and the glue groove, the battery cell abuts on the insulating layer without direct contact with the bottom plate, and the glue joint piece glues the battery cell and the bottom plate, so that the battery cell is firmly fixed; the glue joint piece passes through the through hole, so that the battery cell abuts against the insulating layer, and the battery cell is not directly contacted with the bottom plate. It is connected to 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 connector is a structural member with certain insulation performance; when the battery cell is set in the installation space, the surface of the battery cell abutting the insulation layer does not need to be covered with the insulation layer, and the battery cell and the bottom plate can be isolated by the insulation layer on the bottom plate, and the exposed part of the battery cell is glued to the bottom plate through the adhesive connector, 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.

[0009] As a preferred embodiment of the utility model, a mounting groove is provided on the bottom plate, the mounting groove can limit the battery cell, the gluing groove is provided in the mounting groove, and the insulating layer is provided in the mounting groove. By providing a plurality of mounting grooves on the bottom plate of the battery box, a battery cell can be provided in each mounting groove, and by providing an array of mounting grooves on the bottom plate, the battery cells provided on the bottom plate are arranged in an array, thereby ensuring that sufficient heat dissipation space is reserved between the battery cells, and ensuring uniform heat dissipation inside the battery cells; the mounting groove is adapted to the bottom of the battery cell, and when the battery cell is clamped and installed in the mounting groove, the mounting groove can limit the battery cell in the horizontal direction, making it difficult for the battery cell to shift horizontally in the mounting groove; the insulating layer is attached to the inner wall of the mounting groove, and the insulating layer is clamped by the battery cell and the inner wall of the mounting groove, so that the battery cell and the inner wall of the mounting groove are connected. There is no contact between the walls, thereby ensuring the insulation performance between the battery cell and the bottom plate; a through hole is provided on the insulating layer, through which the installation space and the adhesive groove can be connected, and an adhesive component is provided in the adhesive groove, and the adhesive component passes through the through hole, so that one end of the adhesive component is connected to the battery cell and the other end is connected to the bottom plate of the battery box, so that the battery cell is firmly fixed on the bottom plate; on the contact surface between the battery cell and the insulating layer, the insulating layer can serve as a coating layer of the battery cell to insulate the battery cell, thereby achieving isolation between the battery cell and the insulating layer; while ensuring the insulation performance of the battery box, the battery cell in the battery box can be firmly fixed.

[0010] As a preferred embodiment of the utility model, the adhesive groove is provided at the bottom of the installation groove, and the opening area of ​​the through hole is smaller than the area of ​​the bottom of the groove. An adhesive groove is provided on the bottom of the groove, and the adhesive groove is located in the middle of the bottom of the groove, and the shape of the adhesive groove is the same as the shape of the installation groove, so as to ensure that the adhesive part can be bonded to the center position of the bottom of the battery cell, and to ensure that the adhesive part can provide a considerable pulling force when the battery cell is subjected to stress in all aspects, so as to ensure that the battery cell is always fixed on the bottom plate, and to avoid collision of the battery cell in the installation space, resulting in failure of the battery module; the adhesive groove is a groove structure, and the bonding area between the adhesive part and the adhesive groove is enhanced by bonding the adhesive part to the groove wall and the groove bottom of the groove structure. , so that the adhesive joint is not easy to loosen from the bottom plate, and the firmness of the battery cell and the bottom plate is enhanced; the opening area of ​​the through hole is smaller than the area of ​​the bottom of the groove, and the opening area of ​​the through hole is smaller than the area of ​​the bottom of the battery cell, so that when the battery cell is installed in the installation groove, the bottom of the battery cell can abut on the insulating layer at the bottom of the groove to ensure that the battery cell and the bottom plate do not contact; the opening area of ​​the through hole is at least one half of the area of ​​the bottom of the battery cell. The larger the through hole area, the more firmly the battery cell can be bonded to the bottom of the groove. The shape of the installation groove is preferably a rectangular groove adapted to the battery cell.

[0011] As a preferred solution of the utility model, the insulating layer includes a membrane-like structure adapted to the bottom plate, and the membrane-like structure is laid on the bottom plate; the membrane-like structure is provided with a plurality of protrusions adapted to the mounting groove, and each of the protrusions is provided with the through hole. The insulating layer is a membrane-like structure laid flat on the bottom plate, and the shape of the mold-like structure is adapted to the shape of the bottom plate, so that the membrane-like structure can completely cover the part of the bottom plate located in the mounting space, thereby improving the insulation between the battery cell and the battery box; a protrusion is provided on the membrane-like structure, and the shape of the protrusion is adapted to the shape of the mounting groove, so that when the protrusion is provided in the mounting groove, the protrusion is attached to the groove wall of the mounting groove, and a through hole is provided on the protrusion, and an adhesive is provided in the through hole, and the bottom plate is connected to the battery cell through the adhesive, so that the battery cell is firmly fixed on the bottom plate.

[0012] As a preferred solution of the utility model, the adhesive groove is arranged on the side wall of the installation groove. The adhesive groove is arranged on the side wall of the installation groove, the battery cell is embedded in the adhesive groove, and the side wall of the battery cell is bonded by the adhesive member to fix the battery cell.

[0013] As a preferred embodiment of the utility model, the adhesive member is a structural adhesive, and the thickness of the structural adhesive is less than or equal to 2 mm. The greater the thickness of the structural adhesive, the greater its bonding strength. However, when the thickness is too large, the insulation strength of the battery box will be weakened to a certain extent. The thickness of the structural adhesive is preferably less than or equal to 2 mm; the structural adhesive material can be selected from epoxy resin; the structural adhesive is poured and filled in the adhesive groove, and after the structural adhesive solidifies, the structural adhesive is firmly bonded to the adhesive groove, and the structural adhesive is firmly bonded to the battery cell, so that the structural adhesive connects the battery cell to the bottom plate; the installation groove and the adhesive groove constitute a step, and the battery cell is carried on the step when embedded in the installation groove, and a redundant part of the insulating layer is adapted to the step, so that the bottom part of the battery cell is bonded to the adhesive member and partly abuts against the insulating layer, so that the insulation performance between the battery cell and the bottom plate and the connection strength between the battery cell and the bottom plate can be guaranteed.

[0014] As a preferred solution of the utility model, an adhesive is provided on one side of the insulating layer, the adhesive is bonded to the bottom plate, and the thickness of the insulating layer is less than or equal to 0.15 mm. The insulating layer is attached to the bottom plate and / or the mounting groove by the adhesive; to ensure the insulating performance of the insulating layer, the insulating layer material can be selected from polypropylene, polycarbonate and polyester resin, and the thickness of the insulating layer is preferably less than or equal to 0.15 mm.

[0015] As a preferred embodiment of the utility model, the bottom plate is provided with a plurality of liquid cooling channels, and the liquid cooling channels penetrate the bottom plate. A plurality of liquid cooling channels are provided on the bottom plate, and the liquid cooling channels penetrate the bottom plate from the horizontal direction of the bottom plate, so that adjacent liquid cooling channels are equidistant and parallel to each other; when the coolant flows in the liquid cooling channels, the heat of the battery box can be transferred to the coolant by heat transfer, so that the coolant takes away the heat; in order to improve the heat dissipation effect, the liquid cooling channels are set to channels with rectangular cross-sections. Compared with channels with circular cross-sections, channels with rectangular cross-sections have a larger channel area on the side close to the installation space, so that the liquid cooling channels can take away more heat generated by the battery cells, ensuring the safe operation of the battery cells.

[0016] As a preferred embodiment of the present invention, the CTP battery box further comprises a top plate, which is adapted to cover the opening of the installation space, and the top plate is detachably connected to the side plate. The CTP battery box is also provided with a top plate, which is covered at the opening of the installation space, and is detachably connected to the side plate, so that it is easier for operators to inspect and maintain the battery cells; when installing the battery cells, the battery cells can be operated from the opening of the installation space, which improves the assembly efficiency; the CTP battery box is usually a rectangular box, the installation space of the CTP battery box is a rectangular space, and the top plate of the CTP battery box is a rectangular cover plate; in some embodiments, the battery box is a box structure of other shapes.

[0017] A CTP battery system comprises the above-mentioned CTP battery box and also comprises a battery cell, wherein the battery cell comprises 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 of the battery cell and the side surface of the battery cell both abut the insulating layer.

[0018] In the CTP battery system of the utility model, the side of the battery cell is fully or partially covered with an insulating film, and the bottom of the battery cell is not insulated; when the side of the battery cell is fully covered with the insulating film, the bottom of the battery cell abuts against the insulating layer, and the adhesive bonding piece bonds the battery cell to the adhesive bonding groove; when the side of the battery cell is partially covered with the insulating film, the bottom 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 bonding groove are bonded by the adhesive bonding piece; the insulating film and the insulating layer together form an insulating isolation for the battery cell to avoid contact between the battery cell and the bottom plate; the battery cell is fixed by the adhesive bonding piece to ensure that the battery cell is firmly connected to the battery box to avoid separation of the battery cell from the bottom plate due to external force; in the CTP battery system of the utility model, the battery cell structure inside the battery box is stable, the battery cell is firmly connected to the battery box, and the battery cell has strong insulation performance, so that the CTP battery system has both earthquake resistance and insulation performance.

[0019] As a preferred embodiment of the present invention, the adhesive member is connected to the middle of the bottom surface of the battery cell, the opening area of ​​the through hole is smaller than the bottom surface area, and the opening area of ​​the through hole is at least half of the bottom surface area. The opening area of ​​the through hole is smaller than the bottom surface area of ​​the battery cell, ensuring that when the battery cell is installed, the bottom surface of the battery cell is abutted by the insulating layer to avoid contact between the battery cell and the bottom plate, thereby ensuring the insulation performance between the battery cell and the battery box; the larger the opening area of ​​the through hole, the larger the bonding area between the battery cell and the structural adhesive, and the more firmly the battery cell and the bottom plate are bonded; the opening area of ​​the through hole is at least half of the bottom area of ​​the battery cell, which can ensure that the battery cell and the bottom plate are firmly bonded and the battery cell and the bottom plate are not easy to loosen.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0021] 1. The CTP battery box of the utility model is provided with a bonding groove on the bottom plate, a bonding member is provided in the bonding groove, and the bonding member is bonded to the battery cell so that the battery cell and the bottom plate are fixedly connected, thereby ensuring the connection firmness between the battery cell and the bottom plate; in order to improve the insulation performance between the battery cell and the bottom plate, an insulating layer is provided 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 It is abutted against 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 arranged in the installation space, the surface of the battery cell abutting the insulation layer does not need to be covered with the insulation layer, and the battery cell and the bottom plate can be isolated by the insulation layer on the bottom plate, and 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.

[0022] 2. In the CTP battery system of the present invention, the sides of the battery cells are fully or partially covered with insulating film, and the bottoms of the battery cells are not insulated; when the sides of the battery cells are fully covered with insulating film, the bottoms of the battery cells are in contact with the insulating layer, and the adhesive bonding parts bond the battery cells to the bonding grooves; when the sides of the battery cells are partially covered with insulating film, the bottoms of the battery cells and the sides not covered with insulating film are both in contact with the insulating layer, and the battery cells are bonded to the bonding grooves by adhesive bonding parts; the insulating film and the insulating layer together form an insulating isolation for the battery cells to prevent the battery cells from contacting the bottom plate; the battery cells are fixed by adhesive bonding parts to ensure that the battery cells are firmly connected to the battery box to prevent the battery cells from being separated from the bottom plate due to external forces; in the CTP battery system of the present invention, the battery cell structure inside the battery box is stable, the battery cells are firmly connected to the battery box, and the battery cells have strong insulation performance, so that the CTP battery system has both seismic resistance and insulation performance.

[0023] 3. The CTP battery system is provided with a bonding groove and an insulating layer on the bottom plate, and the battery cell is provided with a partial insulating film. When the battery cell is fixed on the bottom plate, the portion 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 insulating isolation for the battery cell; a through hole is provided on the insulating layer so that the through hole can be adapted and connected with the bonding groove, and the bonding member provided in the bonding groove passes through the through hole and is bonded to the portion of the battery cell not covered with the insulating film, so that the battery cell is firmly connected to the bottom plate; the CTP battery system of the utility model takes into account both the insulating performance and the 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

[0024] Figure 1 It is a schematic diagram of the structure of the CTP battery box;

[0025] Figure 2 It is a schematic diagram of the structure of the bottom plate and insulating film of the CTP battery box;

[0026] Figure 3 is a schematic cross-sectional structural diagram of the insulating layer of Example 1;

[0027] Figure 4 is a schematic cross-sectional structural diagram of the bottom plate of Example 1;

[0028] Figure 5 is a schematic cross-sectional structural diagram of the bottom plate of Example 1 in use state;

[0029] Figure 6 is a schematic cross-sectional structural diagram of the bottom plate of Example 2;

[0030] Figure 7 is a schematic cross-sectional structural diagram of the bottom plate of Example 2 in use;

[0031] Figure 8 is a schematic cross-sectional structural diagram of the bottom plate of Example 4;

[0032] Fig. 9 is a schematic cross-sectional structural diagram of the bottom plate of Example 4 in use;

[0033] Fig.10 is a schematic cross-sectional structural diagram of the bottom plate of Example 5 in use state;

[0034] Fig.11 is a schematic structural diagram of an insulating film of Example 6;

[0035] Fig.12 It is a schematic diagram of the structure of the insulating film of Example 7.

[0036] icon:

[0037] 1-bottom plate, 2-side plate, 3-installation space, 4-gluing groove, 5-insulating layer, 6-through hole, 7-gluing part, 8-installation groove, 9-liquid cooling channel, 10-battery cell, 11-insulating film, 51-protrusion. DETAILED DESCRIPTION

[0038] The utility model is described in detail below in conjunction with the accompanying drawings.

[0039] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0040] Example 1

[0041] like Figure 1-Figure 5The CTP battery box shown includes a bottom plate 1 and several side plates 2, the side plates 2 are connected to the bottom plate 1, and the adjacent side plates 2 are connected to each other to form an installation space 3; a gluing groove 4 is opened on the side of the bottom plate 1 close to the installation space 3, and the gluing groove 4 is covered with an insulating layer 5, and the insulating layer 5 is provided with a through hole 6 adapted to the notch of the gluing groove 4, and a gluing member 7 is arranged in the gluing groove 4, and the gluing member 7 passes through the through hole 6, and the insulating layer 5 can isolate the bottom plate 1 and the battery cell 10, and the gluing member 7 is used to bond the battery cell 10, and the gluing member 7 is an insulating material structural member.

[0042] Specifically, the bottom plate 1 is provided with a mounting groove 8, the mounting groove 8 can limit the battery cell 10, the mounting groove 8 is provided with a bonding groove 4, and the mounting groove 8 is provided with an insulating layer 5. The mounting groove 8 can limit the battery cell 10 to prevent the battery cell 10 from being displaced in the horizontal direction, so that the battery cell 10 is clamped, further strengthening the fixing effect of the bottom plate 1 on the battery cell 10, and improving the anti-seismic ability of the battery box.

[0043] 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 respectively, so as to facilitate the installation of the battery cell 10 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.

[0044] Specifically, the insulating layer 5 is a polypropylene film that matches the shape of the bottom plate 1. The polypropylene film is a membrane-like structural member with good insulation performance. An adhesive surface is provided on one side of the polypropylene film, and the polypropylene film is bonded to the bottom plate 1 through the adhesive surface, so that the board surface of the bottom 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 bottom plate 1; a plurality of protrusions 51 are provided on the polypropylene film, and the arrangement position of the protrusions 51 on the polypropylene film is adapted to the arrangement position of the installation groove 8 on the bottom plate 1, so that when the polypropylene film is attached to the bottom plate 1, the protrusions 51 are sunk into the installation groove 8, the shape of the protrusions 51 is adapted to the installation groove 8, and the protrusions 51 are 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 connector 7 in the through hole 6, the adhesive connector 7 can connect the bottom plate 1 with the battery cell 10 to ensure the connection strength between the battery cell 10 and the bottom plate 1.

[0045] Specifically, a plurality of 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, and the spacing between adjacent battery cells 10 is controlled by the spacing between adjacent mounting grooves 8, thereby 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.

[0046] 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 groove bottom, 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.

[0047] 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.

[0048] 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, so that the battery cell 10 is difficult to escape from the installation groove 8, and the battery cell 10 is difficult to move in the installation space 3, thereby improving the seismic resistance of the battery box.

[0049] Specifically, a liquid cooling channel 9 is provided on the bottom plate 1 of the battery box. The liquid cooling channel 9 penetrates 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, so as to ensure 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 a plurality of 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, and the coolant is introduced into the liquid cooling channel 9 at one end and discharged from the other end. The heat generated by the battery cell 10 in the installation space 3 is taken away by the flow of the coolant, so that the battery box can be maintained in a stable operating temperature environment.

[0050] Specifically, the thickness of the polypropylene film is 0.15mm, and the thickness of the structural adhesive is 2mm. The thickness of the structural adhesive is 2mm, which ensures that the battery cell and the bottom plate are firmly bonded, and at the same time, ensures the insulation performance between the battery cell and the bottom plate; under the condition of ensuring the bonding performance, the thickness of the structural adhesive can be selected to be less than 2mm, and the thinner the thickness of the structural adhesive, the smaller the impact on the insulation performance; the polypropylene film can be selected to have a smaller thickness under the premise of ensuring the insulation performance, and the thinner the polypropylene film, the more conducive it is to saving materials in production; the thickness of the polypropylene film is preferably 0.1mm, and the thickness of the structural adhesive is preferably 1mm.

[0051] Preferably, 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.

[0052] Preferably, the insulating layer 5 may also be made of polycarbonate and polyester resin materials.

[0053] Preferably, the shape of the mounting groove 8 is a rectangular groove adapted to the battery core 10; and the gluing groove 4 is a rectangular groove.

[0054] When the CTP battery box of the utility model is used, the structural glue is injected into the adhesive groove 4 through the through hole 6, and then the battery cell 10 is placed, and 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 is glued to the bottom of the battery cell 10 through the through hole 6, and then the structural glue is naturally solidified, 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, and 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 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 a bonding member 7 is provided in the through hole 6. The bonding member 7 passes through the through hole 6, so that one end of the bonding member 7 is connected to the battery cell 10 and the other end is connected to the bottom plate 1 of the battery box, so that the battery cell 10 is firmly fixed in the battery box.

[0055] In the CTP battery box of the utility model, the battery cells 10 arranged in the battery box are isolated from the bottom plate 1 by the insulating layer 5; the mounting grooves 8 opened on the bottom plate 1 can limit the battery cells 10, and further, the adhesive members 7 arranged in the through holes 6 glue and fix the bottom plate 1 and the battery cells 10; thereby, the battery cells 10 in the battery box can be firmly fixed while ensuring the insulation performance of the battery box.

[0056] Example 2

[0057] like Figure 6-Figure 7 The structure of the CTP battery box shown is substantially the same as that of the first embodiment, but is different from the first embodiment in that the mounting groove 8 is not provided on the bottom plate 1 .

[0058] Specifically, the insulating layer 5 is not provided with the protrusion 51 , and the insulating layer 5 is laid on the bottom plate 1 .

[0059] Specifically, a plurality of through holes 6 adapted to the gluing grooves 4 are provided on the insulating layer 5 . When the insulating layer 5 is laid on the base plate 1 , each opening is aligned and communicated with the notch of the gluing grooves 4 .

[0060] When the CTP battery box of this embodiment is used, the bottom of the battery cell 10 is aligned with the adhesive groove 4 so that the bottom of the battery cell 10 covers 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.

[0061] In the CTP battery box of this embodiment, a bonding groove 4 is provided on the bottom plate 1, and a bonding member 7 is provided in the bonding groove 4. 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 adapted to the bonding groove 4 is provided in the insulating layer 5, 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 abutted against 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 abutting against 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, and 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.

[0062] Example 3

[0063] The structure of the CTP battery box of this embodiment is substantially the same as that of Embodiment 1. The difference from Embodiment 1 is that the bottom plate 1 of the CTP battery box is a circular plate, the side wall of the CTP battery box is a cylindrical structural member, and the circular plate is adapted to the cylindrical structural member.

[0064] Specifically, the installation groove 8 and the adhesive groove 4 are both cylindrical grooves, and the depth of the adhesive groove 4 is 1 mm.

[0065] The CTP battery box of this embodiment has a cylindrical box body. In some embodiments, the box body can also be constructed as other box forms that can accommodate the battery cell 10. The shapes of the mounting groove 8 and the gluing groove 4 are both cylindrical, which are suitable for the installation and fixation of the cylindrical battery cell 10. In some embodiments, the shapes of the mounting groove 8 and the gluing groove 4 can be changed according to the different shapes of the battery cell 10, so as to facilitate the installation and fixation of the battery cell 10.

[0066] Example 4

[0067] like Figure 8-Figure 9 The structure of the CTP battery box shown is substantially the same as that of the first embodiment, except that the insulating layer 5 is a concave film having the same shape as the mounting groove 8 .

[0068] Specifically, the concave membrane is only attached to the bottom and side walls of the installation groove 8 .

[0069] Specifically, a concave membrane is independently arranged in each installation groove 8 .

[0070] In the CTP battery box of this embodiment, a concave film is independently arranged in each installation groove 8, which can save the material usage of the insulating layer 5 while ensuring the insulation performance of the battery cell 10.

[0071] Example 5

[0072] like Fig.10 The structure of the CTP battery box shown is substantially the same as that of Embodiment 1, except that the gluing groove 4 is arranged on the side wall of the mounting groove 8 .

[0073] Specifically, four gluing grooves 4 are provided, and the four gluing grooves 4 are respectively provided on four side walls of the rectangular installation groove 8 .

[0074] The CTP battery box of this embodiment is bonded to the side wall of the battery cell 10 by the adhesive member 7, so as to fix the battery cell 10; the four side surfaces of the battery cell 10 are bonded, so that the battery cell 10 is firmly fixed in the installation groove 8.

[0075] Example 6

[0076] like Fig.11 The CTP battery system shown includes the CTP battery box of Example 1, and also includes a battery cell 10, wherein 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 component 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.

[0077] 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 fitted into 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.

[0078] 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 surface area of ​​the battery cell, and the opening area of ​​the through hole 6 is at least one-half of the bottom surface area of ​​the battery cell. The opening area of ​​the through hole 6 is smaller than the bottom surface area of ​​the battery cell 10, so as to ensure that when the battery cell 10 is installed, the bottom surface of the battery cell 10 is abutted by the insulating layer 5, so as to avoid direct contact between the battery cell 10 and the bottom plate 1, thereby ensuring the 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 more firmly the battery cell 10 and the bottom plate 1 are bonded; the opening area of ​​the through hole 6 is at least one-half of the bottom area of ​​the battery cell 10, so as to ensure that the battery cell 10 and the bottom plate 1 are firmly bonded.

[0079] In the CTP battery system of the utility model, 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 jointly 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 be separated 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 to avoid 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; in the CTP battery system of the utility model, the battery cell 10 inside the battery box has a stable structure, the battery cell 10 is firmly connected to the battery box, and the battery cell 10 has strong insulation performance, so that the CTP battery system has both earthquake resistance and insulation performance.

[0080] Example 7

[0081] like Fig.12 The CTP battery system shown includes the CTP battery box of Example 2, and also includes a battery cell 10, wherein 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 component 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.

[0082] 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 .

[0083] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. CTP battery box, characterized in that: The invention 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 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 to bond the battery cell (10), and the bonding member (7) is an insulating material structural member.

2. The CTP battery box according to claim 1, characterized in that: The bottom plate (1) is provided with a mounting groove (8), the mounting groove (8) being capable of positioning the battery cell (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, characterized in that: The adhesive 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, characterized in that: The insulating layer (5) comprises a membrane-like structure adapted to the base plate (1), the membrane-like structure being laid on the base plate (1); the membrane-like structure being provided with a plurality of protrusions (51) adapted to the mounting grooves (8), each of the protrusions (51) being provided with the through hole (6).

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

6. The CTP battery box according to claim 1, characterized in that: The adhesive joint (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, characterized in that: An adhesive is provided on one side of the insulating layer (5), the adhesive being bonded to the bottom 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, characterized in that: The bottom plate (1) is provided with a plurality of liquid cooling channels (9), and the liquid cooling channels (9) run through the bottom plate (1).

9. The CTP battery box according to any one of claims 1 to 8, characterized in that: The CTP battery box also includes a top plate, the top plate being adapted to cover the opening of the installation space (3), and the top plate being detachably connected to the side plate (2). 10.CTP battery system, characterized in that, The CTP battery box comprises the CTP battery box according to claim 9, and further comprises 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 against the insulating layer (5), or the bottom surface of the battery cell (10) and the side surface of the battery cell (10) both abut against the insulating layer (5).

11. The CTP battery system according to claim 10, characterized in that: The adhesive connection 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 one half of the bottom surface area.

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