CTP liquid-cooled battery box

Abstract

The utility model provides a CTP liquid-cooled battery box, it includes: shell, CTP module, press beam, wire harness CCS and BMS, the CTP module is limited in the closed cavity of shell by press beam, the shell is equipped with the liquid-cooled plate that cools the CTP module and is used for outputting the positive and negative pole socket of CTP module energy, and the BMS monitors and coordinates the operation state of the CTP module through the wire harness CCS. According to the utility model, the CTP module is vertically limited through the pressure beam, and the stiffening structure, the pressure relief structure and the mounting structure of the bridging copper bar are designed in the pressure beam according to the requirements of the safety performance and the discharge performance of the battery box, so that the integrity, the safety and the stability of the battery box are greatly improved on the basis of the existing CTP battery box technology.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage batteries, in particular to a CTP liquid-cooled battery box. Background Art

[0002] With the development of the new energy industry, the energy density of battery boxes has been gradually improved, and CTP (cell to pack) has emerged as a technology application to improve the energy density of battery boxes. The CTP (Cell to Pack) technology simplifies the manufacturing process from battery-module-whole box to battery-whole box, eliminating the intermediate process of binding and fixing the battery cells, which can significantly reduce the weight of the whole package, thereby improving the energy density and reducing the overall production cost of the battery box.

[0003] However, the current CTP battery boxes still have certain defects in structure: for example, since structural accessories such as end plates and steel strips are cancelled, when the module is installed in the box body, it is necessary to first pressurize the module to make its overall size smaller and then drop it into the box body from above. During the process of the module falling into the box body, due to the disappearance of the external pressure, the volume of the module expands, increasing the friction and collision between the part of the module that has not fully entered the box body and the side wall of the box body. This not only increases the assembly difficulty, but also easily causes damage to the blue film of the battery cells, affecting the structure and performance of the battery. In addition, due to the lack of the fastening force of end plates, steel strips, etc., when the battery box is vibrated by external forces or the foam expands, the battery cells will slide up and down, affecting the stability and safety of the battery structure and performance. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a CTP liquid-cooled battery box to solve the problems in the above background.

[0005] The technical solution of the utility model includes: a CTP liquid-cooled battery box, which comprises: a housing, a CTP module, a pressing beam, a wire harness CCS and a BMS. The CTP module is restricted in a closed cavity in the housing by the pressing beam. The housing is provided with a liquid-cooled plate for cooling the CTP module and positive and negative sockets for outputting the energy of the CTP module. The BMS monitors and coordinates the operating state of the CTP module through the wire harness CCS.

[0006] Preferably, the housing comprises an upper box body and a lower box body with opposite openings. The lower box body is provided with a first end plate, a second end plate and a third end plate. The second end plate is located between the first end plate and the third end plate to support the CTP modules on both sides. The pressing beam is arranged at the top of each group of CTP modules. One end of the pressing beam is connected to the second end plate, and the other end is connected to the first end plate or the third end plate.

[0007] Preferably, a PC isolation sheet is provided on the outer wall of the CTP module, and an epoxy board or a nylon slide is provided on the other side of the PC isolation sheet. The epoxy board isolates adjacent CTP modules, and the nylon slide isolates the CTP module from the first end plate, the second end plate, or the third end plate.

[0008] Preferably, the pressure beam includes a pressure plate, a first connecting plate, and a first stiffening rib. The first connecting plate is provided below a set of opposite sides of the pressure plate, and a first bolt hole is provided thereon; the first stiffening rib is provided above the other set of opposite sides of the pressure plate, and a wire harness through hole and an avoidance groove are provided thereon. The wire harness through hole is used to fix the wire harness CCS, and a jumper copper bar connecting different CTP modules is provided in the CTP liquid-cooled battery box across the avoidance groove.

[0009] Preferably, the jumper copper bar includes a second connecting plate and a jumper plate. Both ends of the jumper plate are respectively connected to the second connecting plate through bending parts, and a height difference is formed between the second connecting plate and the jumper plate by the bending parts. A second bolt hole is provided on the second connecting plate.

[0010] Preferably, the pressure beam includes a second stiffening rib and a pressure relief hole. The second stiffening rib and the pressure relief hole are located in the middle of the pressure plate, and the pressure relief hole corresponds to the position of the cell explosion-proof valve on the CTP module.

[0011] Preferably, a maintenance cover plate, a fire nozzle, and a battery box explosion-proof valve are provided on the upper box body. The maintenance cover plate covers the maintenance opening on the upper box body, and the fire nozzle and the battery box explosion-proof valve communicate the inside and outside of the housing respectively.

[0012] Preferably, the liquid-cooling plate is a one-way four-channel liquid-cooling plate provided on the bottom plate of the lower box body, and a communication socket of the BMS and an inlet and outlet water pipe of the liquid-cooling plate are provided on the side plate of the lower box body.

[0013] Preferably, the CTP module includes alternately arranged battery cells and buffer foams, and a fuse is provided between the total electrodes of the battery cells and the positive and negative sockets.

[0014] The beneficial effects of the present utility model are as follows: The CTP module is vertically limited by the pressure beam, and according to the requirements of the safety performance and discharge performance of the battery box, a stiffening structure, a pressure relief structure, and an installation structure for the jumper copper bar are designed in the pressure beam. On the basis of the existing CTP battery box technology, the integrity, safety, and stability of the battery box are greatly increased; the battery cells are comprehensively protected by the PC isolation sheet, epoxy board, and nylon slide provided on the outer periphery of the CTP module, and the assembly efficiency of the CTP module is increased and the blue film of the battery cells is protected by the nylon slide. Description of the Drawings

[0015] Figure 1is the overall view of the embodiment of the present utility model;

[0016] Figure 2 is the structural explosion diagram of the embodiment of the present utility model;

[0017] Figure 3 is the distribution diagram of the internal structure of the lower box body in the embodiment of the present utility model;

[0018] Figure 4 is the distribution diagram of the CTP module and the PC isolation sheet in the embodiment of the present utility model;

[0019] Figure 5 is the structural diagram of the pressure beam in the embodiment of the present utility model;

[0020] Figure 6 is the structural diagram of the jumper copper bar in the embodiment of the present utility model;

[0021] Figure 7 is the connection diagram of the pressure beam and the jumper copper bar in the embodiment of the present utility model;

[0022] Figure 8 is the partial connection diagram of the wire harness CCS and the CTP module in the embodiment of the present utility model.

[0023] In the figure:

[0024] 1. Housing; 1-1. Upper box body; 1-2. Lower box body;

[0025] 2. CTP module; 2-1. Battery cell; 2-2. Buffer foam; 2-3. Battery cell explosion-proof valve;

[0026] 3. Pressure beam; 3-1. Pressure plate; 3-2. Connection plate one; 3-3. Stiffening rib one; 3-4. Stiffening rib two; 3-5. Pressure relief hole; 3-6. Bolting hole one; 3-7. Wire harness perforation; 3-8. Avoidance groove;

[0027] 4. Wire harness CCS;

[0028] 5. BMS;

[0029] 6. Liquid cooling plate;

[0030] 7. Positive and negative sockets;

[0031] 8. Fuse;

[0032] 9. Maintenance port;

[0033] 10. Maintenance cover plate;

[0034] 11. Fire nozzle;

[0035] 12. Battery box explosion-proof valve;

[0036] 13. Communication socket;

[0037] 14. Inlet pipe;

[0038] 15. Outlet pipe;

[0039] 16. First end plate;

[0040] 17. Second end plate;

[0041] 18. Third end plate;

[0042] 19. Mounting hole;

[0043] 20. Jumper copper bar; 20-1. Second connecting plate; 20-2. Jumper plate; 20-3. Bending part; 20-4. Second bolt hole;

[0044] 21. PC isolation sheet;

[0045] 22. Epoxy board;

[0046] 23. Nylon slide plate. Detailed implementation mode

[0047] Next, in combination with the embodiments of the present invention, the technical solutions of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0048] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0049] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0050] Referring to the attached Figures 1 to 8 , this embodiment provides a CTP liquid-cooled battery box, which includes: a housing 1, a CTP module 2, a pressure beam 3, a wire harness CCS 4, and a BMS 5. The CTP module 2 is restricted in a closed cavity inside the housing 1 by the pressure beam 3. The CTP module 2 is limited by the pressure beam 3 to prevent it from sliding up and down during use, which may affect the performance and safety of the battery box. A liquid-cooling plate 6 for cooling the CTP module 2 and positive and negative sockets 7 for outputting the energy of the CTP module 2 are provided on the housing 1. The BMS 5 monitors and coordinates the operating state of the CTP module 2 through the wire harness CCS 4. The CTP module 2 includes alternately arranged battery cells 2-1 and buffer foams 2-2. A fuse 8 is provided between the total negative electrode of the battery cells 2-1 and the negative socket on the housing 1.

[0051] The housing 1 includes an upper box body 1-1 and a lower box body 1-2 with opposite openings. The upper box body 1-1 and the lower box body 1-2 can be connected by means such as bolting or welding, and a sealing foam is provided at the connection between the two to ensure the closure of the cavity inside the housing 1. Among them, a maintenance port 9 is provided on the upper box body 1-1, and a maintenance cover plate 10 is covered at the maintenance port 9. The maintenance cover plate 10 is bolted to the upper box body 1-1 to facilitate the closure of the cavity inside the housing 1 and subsequent disassembly and maintenance. A fire nozzle 11 and a battery box explosion-proof valve 12 are also provided on the side wall of the upper box body 1-1. The fire nozzle 11 and the battery box explosion-proof valve 12 respectively connect the inside and outside of the housing 1 to ensure the safety of the battery box during use. The liquid-cooling plate 6 is provided on the bottom plate of the lower box body 1-2, and it adopts a one-way four-channel liquid-cooling plate 6 to improve the cooling effect on the CTP module 2. A communication socket 13 for the BMS 5, an inlet pipe 14, and an outlet pipe 15 for the liquid-cooling plate 6 are provided on the side plate of the lower box body 1-2 to facilitate information transmission and the circulation of the cooling medium.

[0052] In addition, along the length direction inside the lower box body 1-2, a first end plate 16, a second end plate 17 and a third end plate 18 are sequentially distributed. The three are respectively detachably provided on the lower box body 1-2 or integrally formed with the lower box body 1-2. A plurality of mounting holes 19 are provided at the top of each of the three. The second end plate 17 is located between the first end plate 16 and the third end plate 18 and is used to separate and support the CTP modules 2 on both sides thereof. Two groups of CTP modules 2 are provided on each side of the second end plate 17. An independent pressure beam 3 and a wire harness CCS 4 are provided at the top of each group of CTP modules 2. One end of the pressure beam 3 is connected to the second end plate 17, and the other end is connected to the first end plate 16 or the third end plate 18 according to the position of the CTP module 2 to be limited. The CTP modules 2 on the opposite sides of the second end plate 17 are electrically connected through the wire harness CCS 4, and the CTP modules 2 on the same side of the second end plate 17 are electrically connected through a jumper copper bar 20 provided on the top of the pressure beam 3.

[0053] Refer to the appendix Figures 5 to 7 , the pressure beam 3 includes a pressing plate 3-1, a first connecting plate 3-2, a first stiffening rib 3-3, a second stiffening rib 3-4 and a pressure relief hole 3-5. The first connecting plate 3-2 is provided below a set of opposite side surfaces of the pressing plate 3-1 along the length direction, and a first bolt hole 3-6 is provided thereon for connecting the first end plate 16, the second end plate 17 and the third end plate 18. The first stiffening rib 3-3 and the second stiffening rib 3-4 are used to improve the strength and anti-deformation ability of the pressing plate 3-1. The first stiffening rib 3-3 is provided above a set of opposite side surfaces of the pressing plate 3-1 along the width direction, and a wire harness through hole 3-7 and an avoidance groove 3-8 are provided thereon. The wire harness through holes 3-7 are evenly distributed along the length direction of the first stiffening rib 3-3 for installing the wire harness of the wire harness CCS 4. The avoidance groove 3-8 is located at the long end of the first stiffening rib 3-3 and is integrally formed with the first stiffening rib 3-3 in a concave form with the top surface lower than the top surfaces of other parts of the first stiffening rib 3-3. The pressure beams 3 on the same side of the second end plate 17 are arranged in the same direction, so that the avoidance grooves 3-8 therein are located on the same side, and the jumper copper bar 20 is located above the avoidance groove 3-8. Its two ends cross the avoidance groove 3-8 and are respectively connected to the aluminum bars on different wire harness CCS 4s (the wire harness CCS 4 is a prior art, and the aluminum bar therein is connected to the electrode of the battery cell 2-1 to transmit electrical signals outward), realizing the electrical connection between adjacent CTP modules 2; the second stiffening rib 3-4 and the pressure relief hole 3-5 are provided in the middle of the pressing plate 3-1, and their quantities and shapes can be configured according to actual requirements. The position of the pressure relief hole 3-5 corresponds to the position of the battery cell explosion-proof valve 2-3 on the CTP module 2 to prevent the pressing plate 3-1 from blocking the pressure relief of the battery cell explosion-proof valve 2-3, thereby causing a serious safety accident.

[0054] The above-mentioned jumper copper bar 20 includes a second connecting plate 20-1 and a jumper plate 20-2. Both ends of the jumper plate 20-2 are respectively connected to the second connecting plate 20-1 through bending parts 20-3. The bending parts 20-3 create a height difference between the second connecting plate 20-1 and the jumper plate 20-2. The height difference is configured according to the shape of the top end of the CTP module 2, the thickness of the pressing beam 3, etc., and no specific limitation is made here. During installation, relative to the CTP module 2, the jumper plate 20-2 is higher than the second connecting plate 20-1. The second connecting plate 20-1 is provided with a second bolting hole 20-4 for connecting the first end plate 16, the second end plate 17 or the third end plate 18. If the first end plate 16, the second end plate 17 and the third end plate 18 are made of non-insulating materials, an insulating spacer should also be provided between the second connecting plate 20-1 and them. The part of the second connecting plate 20-1 that extends beyond the first end plate 16 (or the second end plate 17, the third end plate 18) is electrically connected to the aluminum bar in the wire harness CCS4, realizing the electrical connection between adjacent CTP modules 2.

[0055] Refer to the attached Figures 3 to 4 , a PC isolation sheet 21 is provided on the outer wall of the CTP module 2 (specifically including the side wall and the bottom surface) for insulating and protecting the battery cells 2-1 in the CTP module 2. On the other side of the PC isolation sheet 21, there is an epoxy board 22 or a nylon slide plate 23. Among them, the epoxy board 22 is located between adjacent CTP modules 2 on the same side as the second end plate 17 for isolating adjacent CTP modules 2. The nylon slide plate 23 is located between the CTP module 2 and the first end plate 16, between the CTP module 2 and the second end plate 17, and between the CTP module 2 and the third end plate 18 for isolating relevant structures. The nylon slide plate 23 has a smooth cutting surface, which can reduce the friction between the CTP module 2 and the first end plate 16 (or the second end plate 17, the third end plate 18), making it easy for the CTP module 2 to quickly slide down from above into the lower box body 1-2, reducing the time and chance of bumping and friction. And based on the protection of the surface of the battery cells 2-1 by the nylon slide plate 23 and the PC isolation sheet 21, the damage rate of the blue film of the battery cells 2-1 is effectively reduced, greatly improving the structural integrity and performance stability of the CTP battery box.

[0056] Compared with the prior art, the beneficial effects of the present utility model are as follows: The CTP module 2 is vertically limited by the pressing beam 3, and according to the requirements of the safety performance and discharge performance of the battery box, a stiffening structure, a pressure relief structure and an installation structure of the jumper copper bar 20 are designed in the pressing beam 3. On the basis of the existing CTP battery box technology, the integrity, safety and stability of the battery box are greatly increased; the battery cells 2-1 are comprehensively protected by the PC isolation sheet 21, the epoxy board 22 and the nylon slide plate 23 arranged on the outer periphery of the CTP module 2, and the assembly efficiency of the CTP module 2 is accelerated and the blue film of the battery cells 2-1 is protected by the nylon slide plate 23.

[0057] The above are the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A CTP liquid-cooled battery box, characterized in that, Comprising: A housing, a CTP module, a pressing beam, a wiring harness CCS, and a BMS. The CTP module is restricted within a closed cavity inside the housing by the pressing beam. A liquid cooling plate for cooling the CTP module and positive and negative sockets for outputting the energy of the CTP module are provided on the housing. The BMS monitors and coordinates the operating state of the CTP module through the wiring harness CCS.

2. The CTP liquid-cooled battery box according to claim 1, wherein, The housing includes an upper box body and a lower box body with opposite openings. A first end plate, a second end plate, and a third end plate are provided inside the lower box body. The second end plate is located between the first end plate and the third end plate to support the CTP modules on both sides. The pressing beam is provided at the top of each group of CTP modules. One end of the pressing beam is connected to the second end plate, and the other end is connected to the first end plate or the third end plate.

3. The CTP liquid-cooled battery box according to claim 2, wherein, A PC isolation sheet is provided on the outer wall of the CTP module. An epoxy board or a nylon slide plate is provided on the other side of the PC isolation sheet. The epoxy board isolates adjacent CTP modules, and the nylon slide plate isolates the CTP module from the first end plate, the second end plate, or the third end plate.

4. The CTP liquid-cooled battery box according to claim 2, wherein, The pressing beam includes a pressing plate, a first connecting plate, and a first stiffening rib. The first connecting plate is provided below a set of opposite sides of the pressing plate and is provided with a first bolt hole thereon. The first stiffening rib is provided above the other set of opposite sides of the pressing plate and is provided with a wiring harness through hole and an avoidance groove. The wiring harness through hole is used to fix the wiring harness CCS. A jumper copper bar connecting different CTP modules across the avoidance groove is provided in the CTP liquid cooling battery box.

5. The CTP liquid-cooled battery box according to claim 4, wherein, The jumper copper bar includes a second connecting plate and a jumper plate. The two ends of the jumper plate are respectively connected to the second connecting plate through bending parts. The bending parts make a height difference between the second connecting plate and the jumper plate. The second connecting plate is provided with a second bolt hole.

6. The CTP liquid-cooled battery box according to claim 4, wherein, The pressing beam includes a second stiffening rib and a pressure relief hole. The second stiffening rib and the pressure relief hole are located in the middle of the pressing plate. The pressure relief hole corresponds to the position of the cell explosion-proof valve on the CTP module.

7. The CTP liquid-cooled battery box according to claim 2, wherein A maintenance cover plate, a fire nozzle, and a battery box explosion-proof valve are provided on the upper box body. The maintenance cover plate covers the maintenance opening on the upper box body. The fire nozzle and the battery box explosion-proof valve communicate the inside and outside of the housing respectively.

8. The CTP liquid-cooled battery box according to claim 2, wherein The liquid cooling plate is a one-way four-channel liquid cooling plate provided on the bottom plate of the lower box body. A communication socket of the BMS and an inlet and outlet water pipe of the liquid cooling plate are provided on the side plate of the lower box body.

9. The CTP liquid-cooled battery box according to any one of claims 1-8, characterized in that, The CTP module includes alternately arranged cells and buffer foams. A fuse is provided between the total electrodes of the cells and the positive and negative sockets.

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