CTP energy storage box body and plug-in box

Abstract

The utility model relates to the technical field of CTP batteries, in particular to a CTP energy storage box body and a plug box, the CTP energy storage box body comprises a bottom shell and a box cover connected with the bottom shell in a sealing mode, the bottom shell is provided with a pressure releasing piece and a plurality of slots, the slots are arranged on the two sides of the pressure releasing piece, the slots are used for inserting battery modules, and the box cover is provided with a plurality of plug holes. An exhaust passage is arranged in the pressure release part, a plurality of pressure release parts are arranged on the side wall of the pressure release part, the plurality of pressure release parts can be broken under pressure, so that a thermal runaway battery cell can be subjected to pressure release through the exhaust passage, a pressure release valve is arranged on the CTP energy storage box body, one end of the exhaust passage is closed, and the other end of the exhaust passage is closed. And the other end of the exhaust channel is connected with the pressure relief valve. According to the utility model, the pressure release part is arranged between the slots, so that gas or liquid in the thermal runaway battery cell is sprayed into the exhaust channel of the pressure release part from the side surface, and the battery cell is suitable for energy storage high-capacity PACK.

Description

Technical Field

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

[0002] In the existing energy storage PACK, the poles and explosion-proof valves of the battery cells are on the same side, and the thermoelectric side is on the same side, which has poor safety performance. In addition, when a battery cell thermally runs away, it will transfer high-temperature and high-pressure gas or liquid to the surrounding battery cells, which may easily cause thermal runaway of multiple battery cells.

[0003] The Chinese utility model patent with the authorization announcement number CN220021355U discloses a battery and electrical equipment. The battery includes a protective plate and a cell support frame. The cell support frame is provided with an exhaust hole. The protective plate is provided with a thinning area and an exhaust flow channel. The thinning area can be ruptured under pressure to connect the exhaust hole with the exhaust flow channel, which can effectively prevent the impact of high-temperature gas rushing out of a single cell. The Chinese invention patent application with the application publication number CN118336283A discloses a battery and a heat dissipation method for batteries during thermal runaway. This method sets an explosion-proof valve at the bottom of the cell and also uses a discharge channel at the bottom of the bottom shell to drain the gas or liquid discharged from the thermal runaway cell to avoid affecting other cells. However, the above two solutions are only applicable to cylindrical batteries, and when the cell thermally runs away, it is discharged downward into the exhaust flow channel. They are not applicable to CTP battery packs with liquid cooling plates arranged at the bottom of the box. Utility Model Content

[0004] The purpose of this utility model is to address the defects of the existing technology and provide a CTP energy storage box and plug-in box. By arranging a pressure release piece between the slots, the gas or liquid in the battery cell that is in thermal runaway is sprayed from the side into the exhaust channel of the pressure release piece, which is suitable for large-capacity energy storage PACK.

[0005] In order to solve the above technical problems, in a first aspect, the utility model provides a CTP energy storage box, comprising a bottom shell and a box cover sealed to the bottom shell, a pressure release piece and a plurality of slots being provided on the bottom shell, the slots being arranged on both sides of the pressure release piece, the slots being used to insert battery modules, an exhaust channel being provided in the pressure release piece, a plurality of pressure relief parts being provided on the side wall of the pressure release piece, the plurality of pressure relief parts being ruptured under pressure, so that a battery cell in thermal runaway can be depressurized through the exhaust channel, a pressure relief valve being provided on the CTP energy storage box, one end of the exhaust channel being closed, and the other end of the exhaust channel being connected to the pressure relief valve.

[0006] Furthermore, the pressure release member includes a pressure release plate, which is in an inverted U shape. A liquid cooling plate is provided on the bottom shell, the bottom of the pressure release plate is fixed on the liquid cooling plate, and the exhaust channel is provided on the inner side of the pressure release plate.

[0007] Furthermore, the pressure relief portion includes a pressure relief hole and a protective film. The pressure relief hole is opened on two side walls of the pressure release plate. The protective film is arranged on the pressure relief hole to seal the pressure relief hole.

[0008] Furthermore, the protective film is fixedly arranged on a side of the pressure relief hole close to the exhaust channel.

[0009] Furthermore, a first end fixing piece and a second end fixing piece are provided on the bottom shell, and the first end fixing piece and the second end fixing piece are respectively arranged in parallel near the two ends of the bottom shell, the slot is arranged between the first end fixing piece and the second end fixing piece, the pressure release piece is perpendicular to the first end fixing piece, one end of the exhaust channel is closed by the first end fixing piece, and a plurality of second end fixing pieces are provided, and one end of the second end fixing piece is fixedly connected to the side wall of the pressure release piece.

[0010] Furthermore, a plurality of intermediate fixing members are provided on the bottom shell, and the intermediate fixing members are arranged in parallel between the first end fixing member and the second end fixing member, one end of the intermediate fixing member is fixedly connected to the side wall of the pressure release member, and a limiting insulating strip is provided at the other end of the intermediate fixing member, and the limiting insulating strip, the first end fixing member, the second end fixing member, the intermediate fixing member, and the pressure release member are enclosed to form a plurality of slots.

[0011] Furthermore, positioning holes are provided on the tops of the first end fixing piece, the second end fixing piece, and the middle fixing piece. The positioning holes are used to cooperate with a fixture so that the battery module can accurately fall into the slot.

[0012] Furthermore, the side walls of the first end fixing piece, the second end fixing piece, and the middle fixing piece are all provided with fixture grooves, and the fixture grooves are used to cooperate with a tooling fixture so that the tooling fixture can be inserted into the fixture grooves.

[0013] In a second aspect, the utility model provides a CTP energy storage plug-in box, comprising the CTP energy storage box body and a battery module, wherein the battery module comprises a plurality of battery cells, the poles and explosion-proof valves of the battery cells are respectively arranged at both ends of the battery cells, and the battery cells are placed horizontally in the slots so that the explosion-proof valves correspond to the pressure relief parts.

[0014] Furthermore, foam and insulating plates are provided between the battery module and the pressure release member, between the battery module and the first end fixing member, and between the battery module and the second end fixing member.

[0015] The beneficial effects of the utility model are:

[0016] 1. The utility model sets a pressure release piece between the slots, so that the gas or liquid in the thermal runaway battery cell is sprayed from the side into the exhaust channel of the pressure release piece, which is suitable for large-capacity energy storage PACK.

[0017] 2. The pressure relief part of the utility model includes a pressure relief hole and a protective film. The protective film can be made of thin aluminum sheet, thin plastic sheet, etc. When the battery cell thermally runs away, high-temperature gas and liquid are ejected from the explosion-proof valve of the battery cell, and the corresponding protective film is pushed open. Other battery cells are protected by the corresponding protective film, so that the high-temperature gas and liquid will not be transmitted to other battery cells, reducing the risk of thermal runaway of other battery cells and improving safety.

[0018] 3. The protective film of the present invention is fixedly arranged on the side of the pressure relief hole close to the exhaust channel, which can prevent the protective film from encroaching on the slot space.

[0019] 4. The pressure release plate of the present invention is in an inverted U shape and is fixed to the liquid cooling plate, so that the high-temperature gas and liquid entering the exhaust channel can be cooled by the liquid cooling plate.

[0020] 5. The tops of the first end fixing piece, the second end fixing piece and the middle fixing piece of the utility model are all provided with positioning holes and the side walls are all provided with fixture grooves, which are convenient for cooperation with the tooling fixture so that the battery module can fall into the slot accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the main view of the CTP energy storage box of the utility model;

[0022] Figure 2 for Figure 1 Middle AA cross-section;

[0023] Figure 3 This is a front view of the pressure release member of the utility model;

[0024] Figure 4 It is a side view of the pressure release member of the utility model;

[0025] Figure 5 This is a front view of the first end fixing member of the present invention;

[0026] Figure 6 This is a top view of the first end fixing member of the present invention;

[0027] Figure 7This is a front view of the second end fixing member of the utility model;

[0028] Figure 8 This is a top view of the second end fixing member of the present invention;

[0029] Figure 9 This is a front view of the intermediate fixing member of the utility model;

[0030] Figure 10 This is a top view of the intermediate fixing member of the utility model;

[0031] Figure 11 This is the main view of the CTP energy storage plug-in box of the utility model;

[0032] Figure 12 for Figure 11 Middle BB cross-section;

[0033] Figure 13 This is a schematic diagram of the connection structure between the battery module and the CCS of the utility model;

[0034] Figure 14 This is a schematic diagram of the structure of the battery cell of the utility model;

[0035] Figure 15 This is a schematic diagram of the structure of the fixture of the utility model clamping the battery module;

[0036] Figure 16 This is a schematic diagram of the structure of the fixture of the utility model that places the battery module horizontally;

[0037] Figure 17 This is a structural diagram of the tooling fixture of the utility model inserting the battery module into the slot.

[0038] Figure markings: 1- bottom shell; 2- box cover; 3- top insulation plate; 4- liquid cooling plate; 5- side insulation plate; 6- limiting insulation strip; 7- slot; 8- first end fixing piece; 9- second end fixing piece; 10- middle fixing piece; 11- pressure release piece; 12- pressure release plate; 13- pressure relief hole; 14- protective film; 15- exhaust channel; 16- pressure relief valve; 17- positioning hole; 18- fixture slot; 19- battery module; 20- battery cell; 21- pole; 22- explosion-proof valve; 23- insulation plate; 24- foam; 25- thermal conductive structural adhesive; 26- liquid inlet pipe; 27- liquid outlet pipe; 28- jumper aluminum bar; 29- tooling fixture; 30- splint; 31- positioning rod; 32- CCS. DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0040] Example 1

[0041] This embodiment provides a CTP energy storage box, including a bottom shell 1 and a box cover 2 sealed with the bottom shell 1. Figure 2 As shown, a liquid cooling plate 4 is fixedly provided at the bottom of the bottom shell 1. Figure 1 As shown, a pressure release member 11, a first end fixing member 8, a second end fixing member 9, and an intermediate fixing member 10 are fixed to the bottom of the bottom shell 1. The pressure release member 11 is arranged along the length of the bottom shell 1, and the first end fixing member 8, the second end fixing member 9, and the intermediate fixing member 10 are all arranged parallel to the width of the bottom shell 1. One pressure release member 11 and one first end fixing member 8 are each provided, and two second end fixing members 9 and two intermediate fixing members 10 are each provided. The first end fixing member 8 and the second end fixing member 9 are respectively arranged near the two ends of the shell, and the intermediate fixing member 10 is fixed between the first end fixing member 8 and the second end fixing member 9. In this embodiment, the bottoms of the pressure release member 11, the first end fixing member 8, the second end fixing member 9, and the intermediate fixing member 10 are all welded to the liquid cooling plate 4. One end of the pressure release member 11 is welded to the side of the first end fixing member 8, one end of the intermediate fixing member 10 is welded to the side of the pressure release member 11, and one end of the second end fixing member 9 is welded to the side of the pressure release member 11.

[0042] like Figure 2 As shown, a limiting insulating strip 6 is also bonded to the liquid cooling plate 4. The limiting insulating strip 6 is arranged at the end of the intermediate fixing part 10 away from the pressure release part 11. The limiting insulating strip 6 is arranged parallel to the pressure release part 11. The limiting insulating strip 6, the first end fixing part 8, the second end fixing part 9, the intermediate fixing part 10, and the pressure release part 11 are enclosed to form four slots 7 for fixing the battery module 19.

[0043] like Figure 3 As shown, the pressure release member 11 includes a pressure release plate 12. The cross section of the pressure release plate 12 is inverted U-shaped. The pressure release plate 12 can be made of a bent part or a welded steel plate. The bottom end surface of the pressure release plate 12 is welded to the liquid cooling plate 4, so that an exhaust channel 15 is enclosed between the pressure release plate 12 and the liquid cooling plate 4. Figure 1 、 11 As shown, one end of the exhaust passage 15 is sealed by the first end fixing member 8 , and the other end of the exhaust passage 15 is connected to the pressure relief valve 16 on the tank cover 2 .

[0044] like Figure 3 、4 As shown, multiple pressure relief holes 13 are provided on both sides of the pressure release plate 12, arranged along the length of the pressure release plate 12. A protective film 14 is fixedly provided on one side of the pressure relief hole 13 near the exhaust channel 15. In this embodiment, the protective film 14 can be made of a thin aluminum sheet, a thin plastic sheet, or the like, and is adhered to the inside of the pressure relief hole 13 by adhesive. When a battery cell 20 experiences thermal runaway and high-temperature gas and liquid are ejected from the explosion-proof valve 22 of the battery cell 20, the corresponding protective film 14 is pushed open. The protective films 14 corresponding to the other battery cells 20 remain unchanged, and the high-temperature gas and liquid are directed and discharged from the exhaust channel 15, and then directly discharged from the pressure relief valve 16 of the box cover 2. This reduces the risk of thermal runaway of other battery cells 20 and improves safety. Furthermore, since the bottom of the exhaust channel 15 is a liquid cooling plate 4, the liquid cooling plate 4 can cool the high-temperature gas and liquid, thereby improving the battery pack's ability to prevent thermal runaway.

[0045] like Figure 5 、 6 As shown, the first end fixing member 8 is plate-shaped, and a plurality of clamp grooves 18 are provided on one side of the first end fixing member 8 close to the second end fixing member 9, and a plurality of positioning holes 17 are provided on the top of the first end fixing member 8.

[0046] like Figure 7 、 8 As shown, the second end fixing piece 9 is plate-shaped, a plurality of clamp grooves 18 are provided on a side of the second end fixing piece 9 close to the first end fixing piece 8 , and a positioning hole 17 is provided on the top of the second end fixing piece 9 .

[0047] like Figure 9 、 10 As shown, the intermediate fixing member 10 is in a plate shape, a plurality of clamp slots 18 are provided on both sides of the intermediate fixing member 10 , and a positioning hole 17 is provided on the top of the intermediate fixing member 10 .

[0048] The first end fixing piece 8 , the second end fixing piece 9 , the positioning holes 17 and the fixture slots 18 of the intermediate fixing piece 10 are all used to cooperate with the tooling fixture 29 .

[0049] A liquid inlet pipe 26 and a liquid outlet pipe 27 are provided at one end of the bottom shell 1 close to the first end fixing piece 8 , and both the liquid inlet pipe 26 and the liquid outlet pipe 27 are connected to the liquid cooling plate 4 .

[0050] Example 2

[0051] like Figure 11 、 12As shown, this embodiment provides a CTP energy storage plug-in box, including the CTP energy storage box body in Example 1, a battery module 19 is fixedly arranged in the slot 7 of the CTP energy storage box body, the bottom of the battery module 19 is fixedly connected to the liquid cooling plate 4 through a thermal conductive structural adhesive 25, and foam 24 and an insulating plate 23 are arranged between the battery module 19 and the pressure release member 11, between the battery module 19 and the first end fixing member 8, and between the battery module 19 and the second end fixing member 9. The side of the battery module 19 away from the pressure release member 11 is tightly attached to the limiting insulating strip 6.

[0052] like Figure 13 As shown, the battery module 19 includes a plurality of battery cells 20, and a foam 24 with double-sided adhesive is provided between two adjacent battery cells 20, thereby connecting the plurality of battery cells 20 into a battery module 19. Figure 14 As shown, the pole 21 and the explosion-proof valve 22 of the battery cell 20 are respectively arranged at both ends of the battery cell 20. Figure 13 As shown, after multiple cells 20 are connected to form a battery module 19, the CCS 32 of each module is welded. Figure 11 As shown, the explosion-proof valve 22 of the battery cell 20 faces the pressure release member 11 , so that the explosion-proof valve 22 corresponds to the pressure relief hole 13 .

[0053] like Figure 11 As shown, the CCS 32 of two adjacent battery modules 19 along the length direction are connected by a connecting aluminum bar, and the CCS 32 of two adjacent battery modules 19 near the second end fixing piece 9 along the width direction are connected by a jumper aluminum bar 28. The insulating terminals of the CCS total positive / negative connecting aluminum bar are fixed to the first end fixing piece 8 by snap-fit ​​installation, and the CCS total positive / negative connecting aluminum bar and the total positive / negative aluminum bar are fixed to the insulating terminals by bolts.

[0054] The assembly method of the CTP energy storage plug-in box is as follows:

[0055] Place the poles 21 of the battery cells 20 facing upwards, connect the sides of two adjacent battery cells 20 with double-sided tape and foam 24, connect the insulation plates 23 and the battery cells 20 at both ends with double-sided tape and foam 24, and stack the insulation plates 23, foam 24 and battery cells 20 on the stacking tool to form a vertical battery module 19. Figure 15 As shown, according to the pressure requirements, a fixture 29 is used to compress the battery module 19 to the specified size, and a measuring tool such as a caliper or laser ruler is used to determine the size of the battery module 19. The fixture 29 includes a clamping plate 30 and a positioning rod 31, which respectively cooperate with the fixture slot 18 and the positioning hole 17.

[0056] After the battery module 19 is compressed to the specified size, the CCS 32 of each module is welded.

[0057] like Figure 16As shown, the fixture 29 is rotated 90°, so that the vertical battery module 19 is transformed into a horizontal battery module 19, ready for being put into the box.

[0058] like Figure 17 As shown, a thermal conductive structural adhesive 25 is applied to the bottom of each slot 7, the clamp 30 of the fixture 29 first falls into the fixture groove 18, and the position of the battery module 19 is adjusted so that the positioning rod 31 of the fixture 29 falls into the positioning hole 17. After positioning by the positioning rod 31 and the positioning hole 17, the battery module 19 is accurately dropped to the bottom of the box, the weight is installed on the battery module 19, and the battery module 19 is pressed down so that the battery module 19 is fixed on the liquid cooling plate 4 through the thermal conductive structural adhesive 25.

[0059] Use the connecting aluminum bar and the connecting wire harness to connect the CCS32 of two adjacent battery modules 19 along the length direction of the bottom shell, use the jumper aluminum bar 28 to connect the CCS32 of the two battery modules 19 close to the second end fixture 9, and fix the insulating terminals of the CCS total positive / negative connecting aluminum bar to the first end fixture 8 through snap installation. The CCS total positive / negative connecting aluminum bar and the total positive / negative aluminum bar are fixed to the insulating terminals through bolts, and the CCS32 communication connector is fixed to the first end fixture 8 through foam 24.

[0060] Attach side insulation plates 5 to the CCS assembly and top insulation plates 3 above the four battery modules 19 to ensure insulation from the tank cover. Install the main positive and negative terminals, fuse, MSD, communication connector, slave control, fire protection connector, BMS communication cable, main negative and positive aluminum busbars, pressure relief valve 16, jumper aluminum busbar 28, tank cover, and sealing ring.

[0061] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A CTP energy storage box, characterized by: The invention comprises a bottom shell (1) and a box cover (2) sealedly connected to the bottom shell (1); a pressure release piece (11) and a plurality of slots (7) are provided on the bottom shell (1); the slots (7) are arranged on both sides of the pressure release piece (11); the slots (7) are used to insert battery modules (19); an exhaust channel (15) is provided in the pressure release piece (11); a plurality of pressure relief parts are provided on the side wall of the pressure release piece (11); the plurality of pressure relief parts can be ruptured under pressure, so that a battery cell (20) in thermal runaway can be relieved of pressure through the exhaust channel (15); a pressure relief valve (16) is provided on the CTP energy storage box; one end of the exhaust channel (15) is closed, and the other end of the exhaust channel (15) is connected to the pressure relief valve (16).

2. The CTP energy storage box according to claim 1, characterized in that: The pressure release member (11) includes a pressure release plate (12), the pressure release plate (12) is in an inverted U shape, a liquid cooling plate (4) is provided on the bottom shell (1), the bottom of the pressure release plate (12) is fixed on the liquid cooling plate (4), and the exhaust channel (15) is provided on the inner side of the pressure release plate (12).

3. The CTP energy storage box according to claim 2, characterized in that: The pressure relief portion comprises a pressure relief hole (13) and a protective film (14). The pressure relief hole (13) is opened on two side walls of the pressure release plate (12). The protective film (14) is arranged on the pressure relief hole (13) and closes the pressure relief hole (13).

4. The CTP energy storage box according to claim 3, characterized in that: The protective film (14) is fixedly arranged on a side of the pressure relief hole (13) close to the exhaust channel (15).

5. The CTP energy storage box according to any one of claims 1 to 4, characterized in that: A first end fixing piece (8) and a second end fixing piece (9) are provided on the bottom shell (1), the first end fixing piece (8) and the second end fixing piece (9) are respectively arranged in parallel close to the two ends of the bottom shell (1), the slot (7) is arranged between the first end fixing piece (8) and the second end fixing piece (9), the pressure release piece (11) is perpendicular to the first end fixing piece (8), one end of the exhaust channel (15) is closed by the first end fixing piece (8), a plurality of second end fixing pieces (9) are provided, and one end of the second end fixing piece (9) is fixedly connected to the side wall of the pressure release piece (11).

6. The CTP energy storage box according to claim 5, characterized in that: A plurality of intermediate fixing members (10) are provided on the bottom shell (1), and the intermediate fixing members (10) are arranged in parallel between the first end fixing member (8) and the second end fixing member (9), one end of the intermediate fixing member (10) is fixedly connected to the side wall of the pressure release member (11), and a limiting insulating strip (6) is provided at the other end of the intermediate fixing member (10), and the limiting insulating strip (6), the first end fixing member (8), the second end fixing member (9), the intermediate fixing member (10), and the pressure release member (11) enclose a plurality of slots (7).

7. The CTP energy storage box according to claim 6, characterized in that: Positioning holes (17) are provided on the tops of the first end fixing piece (8), the second end fixing piece (9), and the middle fixing piece (10). The positioning holes (17) are used to cooperate with the fixture (29) so that the battery module (19) can accurately fall into the slot (7).

8. The CTP energy storage box according to claim 6, characterized in that: A clamp groove (18) is provided on the side walls of the first end fixing piece (8), the second end fixing piece (9), and the intermediate fixing piece (10). The clamp groove (18) is used to cooperate with a tooling fixture (29) so that the tooling fixture (29) can be inserted into the clamp groove (18).

9. A CTP energy storage plug-in box, characterized by: The invention comprises a CTP energy storage box according to any one of claims 1 to 8, and further comprises a battery module (19), wherein the battery module (19) comprises a plurality of battery cells (20), and the poles (21) and explosion-proof valves (22) of the battery cells (20) are respectively arranged at both ends of the battery cells (20), and the battery cells (20) are placed horizontally in the slot (7) so that the explosion-proof valves (22) correspond to the pressure relief parts.

10. The CTP energy storage plug-in box according to claim 9, characterized in that: Foam (24) and an insulating plate (23) are provided between the battery module (19) and the pressure release member (11), between the battery module (19) and the first end fixing member (8), and between the battery module (19) and the second end fixing member (9).

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