Battery cabinet and cabinet type energy storage system

Abstract

The utility model discloses a battery cabinet and a cabinet type energy storage system, the battery cabinet comprises a cabinet body, a first cabinet door and a back plate, the cabinet body is provided with a battery cavity, a first opening and a second opening, the first opening and the second opening are respectively arranged at two opposite sides of the cabinet body and are communicated with the battery cavity, the periphery of the second opening is provided with a plurality of connecting parts, and the connecting parts are connected with the back plate. A battery mounting rack is arranged in the battery cavity; the first cabinet door is rotationally mounted at the first opening and has a door closing state for covering the first opening and a door opening state for opening the first opening; the back plate and the cabinet body are formed in a split mode and cover the second opening, a sealing structure is arranged between the periphery of the back plate and the periphery of the second opening, and a connecting structure is arranged at the position, corresponding to the connecting part, of the inner side of the back plate. The connecting part and the battery mounting rack are staggered in the direction from the first opening to the second opening, so that the connecting structure and the connecting part can be connected and fixed from the first opening. According to the technical scheme, the waterproof performance of the battery cabinet can be improved, and the risk of water entering the battery cavity is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, in particular to a battery cabinet and a cabinet-type energy storage system. Background Art

[0002] With the continuous development of energy storage technology, energy storage systems are becoming more and more widely used. At present, cabinet-type energy storage systems are widely used. Generally speaking, a sealing ring is provided between the cabinet body and the cabinet door of the battery cabinet, and the rest of the cabinet body is sealed by one-piece molding or welding, which can achieve anti-disassembly and improve waterproof performance. However, the one-piece molding method is more expensive, and the welding method is prone to cold welding and other problems, and there is a greater risk of water ingress when used outdoors. Utility Model Content

[0003] The main purpose of the utility model is to provide a battery cabinet, aiming to improve the waterproofness of the battery cabinet and reduce the risk of water entering the battery cavity.

[0004] To achieve the above-mentioned purpose, the battery cabinet proposed by the utility model comprises:

[0005] A cabinet having a battery cavity, a first opening and a second opening, wherein the first opening and the second opening are respectively arranged on opposite sides of the cabinet and are both connected to the battery cavity, a plurality of connecting parts are arranged on the periphery of the second opening, and a battery mounting frame is arranged in the battery cavity;

[0006] A first cabinet door is rotatably mounted at the first opening and has a closed state covering the first opening and an open state opening the first opening;

[0007] A back plate, which is formed separately from the cabinet body and covers the second opening, a sealing structure is provided between the back plate and the periphery of the second opening, and a connecting structure is provided at a position on the inner side of the back plate corresponding to the connecting portion;

[0008] The connecting portion and the battery mounting frame are staggered in a direction from the first opening to the second opening, so that the connecting structure can be connected and fixed to the connecting portion from the first opening.

[0009] Optionally, the connecting portion is provided with a first through hole, the connecting structure has a stud, and the battery cabinet further includes a locking nut, the stud passes through the first through hole, the locking nut is screwed on the stud and is located on a side of the connecting portion away from the back plate.

[0010] Optionally, the connecting structure includes a mounting member and a threaded member. The mounting member is mounted on the inner side surface of the back plate. The mounting member is provided with a plurality of second through holes. The threaded member includes the stud and a limiting portion provided at one end of the stud. The stud passes through the second through hole, and the limiting portion is located on the side of the mounting member facing the back plate.

[0011] Optionally, the connecting structure includes a plurality of the mounting members. The plurality of mounting members are arranged in one-to-one correspondence with the respective side edges of the first opening. Each of the mounting members is provided with a plurality of the second through holes, and each of the second through holes is provided with one of the threaded members.

[0012] Optionally, a groove is provided on the side of the mounting member facing the back plate. The plurality of second through holes on the mounting member are all located in the groove, and the limiting portion is located in the groove.

[0013] Optionally, the connecting portion includes a fixing plate and a connecting plate that are perpendicularly connected to each other. The fixing plate is connected to the cabinet body, and the connecting plate is provided with the first through hole.

[0014] Optionally, the sealing structure includes at least one sealing ring. The sealing ring is disposed around the first opening and abuts between the first opening and the back plate.

[0015] Optionally, the battery cavity has two opposite cavity side walls. The battery mounting rack includes a plurality of support plates. The two cavity side walls are both provided with a plurality of the support plates. The plurality of support plates on the same cavity side wall are spaced apart in the vertical direction. The plurality of support plates on the two cavity side walls are opposite to each other one by one to form a battery placement position on the opposite support plates on the two cavity side walls; the connecting portion is disposed corresponding to the position between two adjacent support plates.

[0016] Optionally, the cabinet body further has an electric control cavity, a mounting cavity, a third opening, and a fourth opening. The electric control cavity is located below the battery cavity. The mounting cavity is located between the battery cavity and the electric control cavity. The mounting cavity is used for mounting a liquid cooling module. The electric control cavity is used for mounting a circuit device; the third opening is located below the first opening and communicates the mounting cavity and the electric control cavity. The fourth opening is located below the second opening and communicates the mounting cavity and the electric control cavity. The first cabinet door covers the first opening and the third opening in the closed state; the battery cabinet further includes a second cabinet door. The second cabinet door is rotatably mounted at the fourth opening to cover or open the fourth opening;

[0017] The first cabinet door is provided with a first ventilation opening corresponding to the positions of the mounting cavity and the electric control cavity. The second cabinet door is provided with a second ventilation opening corresponding to the positions of the mounting cavity and the electric control cavity.

[0018] The present utility model also provides a cabinet - type energy storage system, which includes a plurality of battery boxes and the battery cabinet as described above. The plurality of battery boxes are arranged in the battery cavity of the battery cabinet.

[0019] The technical solution of the present utility model is to set opposite first opening and second opening on the cabinet body, set a first cabinet door at the first opening, and seal the second opening with a cover plate. In this way, it is convenient to form the cabinet body. While reducing the cost, the sealing performance of each part of the cabinet body can be better. Since the connecting structure is set on the inner side of the cover plate and is connected and fixed to the connecting part in the cabinet body through the connecting structure, the situation of setting screw holes between the cabinet body and the cover plate is avoided, which can improve the sealing performance between the cover plate and the cabinet body. At the same time, there are more optional forms of the sealing structure between the cabinet body and the cover plate, which is more conducive to ensuring the sealing performance between the cabinet body and the cover plate. Thus, while facilitating the forming of the cabinet body and reducing the production cost of the battery cabinet, the waterproof performance of the battery cabinet can be improved, and the risk of water entering the battery cavity can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following - described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0021] Figure 1 It is a schematic structural diagram of an embodiment of the battery cabinet of the present utility model;

[0022] Figure 2 It is Figure 1 a schematic structural diagram of the battery cabinet in FIG. when the hidden back plate is opened and the second cabinet door is opened;

[0023] Figure 3 It is Figure 2 an enlarged view of part A in FIG.

[0024] Figure 4 It is Figure 2 an enlarged view of part B in FIG.

[0025] Figure 5 It is Figure 1 a schematic structural diagram of the back plate in FIG.

[0026] Figure 6 It is Figure 5 an enlarged view of part C in FIG.

[0027] Figure 7 It is Figure 1 a schematic diagram of another angle of the battery cabinet in FIG.

[0028] Figure 8 It isFigure 7 Enlarged view of D in the middle

[0029] Figure 9 The structural schematic diagram of an embodiment of the cabinet - type energy storage system of the present utility model

[0030] Explanation of the reference numerals in the drawings

[0031] 10. Cabinet body; 11. Battery cavity; 12. Electric control cavity; 13. Installation cavity; 101. First opening; 102. Second opening; 103. Third opening; 104. Fourth opening; 14. Connection part; 143. First through - hole; 20. First cabinet door; 21. First ventilation opening; 30. Second cabinet door; 31. Second ventilation opening; 40. Back panel; 41. Mounting part; 411. Second through - hole; 412. Groove; 421. Stud; 43. Sealing ring; 51. Support plate; 52. Support frame; 61. Heat insulation plate; 62. Air guide cylinder; 63. Vertical air guide plate; 71. Battery box; 72. High - voltage box; 73. Energy storage inverter; 74. Electric control module; 81. Liquid cooling module

[0032] The realization of the purpose, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings Specific embodiments

[0033] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the scope of protection of the present utility model

[0034] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly

[0035] In addition, if descriptions such as "first" and "second" are involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0036] The present utility model provides a battery cabinet.

[0037] In the embodiments of the present utility model, as Figures 1 to 9 shown, the battery cabinet includes a cabinet, the cabinet having a battery chamber 11 and an electrical control chamber 12. The battery chamber 11 is used for installing a battery box 71, and the electrical control chamber 12 is used for installing a circuit device. Optionally, the circuit device includes at least one of a high-voltage box 72, an energy storage inverter 73, and a control module (including a circuit breaker, a control circuit, etc.).

[0038] In some embodiments, the cabinet includes a cabinet body 10, a first cabinet door 20, and a back plate 40. The cabinet body 10 has a battery chamber 11, a first opening 101, and a second opening 102. The first opening 101 and the second opening 102 are respectively disposed on opposite sides of the cabinet body 10 and are both communicated with the battery chamber 11. A plurality of connecting portions 14 are provided on the periphery of the second opening 102, and a battery mounting rack is provided in the battery chamber 11;

[0039] The first cabinet door 20 is rotatably installed at the first opening 101 and has a closed state of covering the first opening 101 and an open state of opening the first opening 101;

[0040] The back plate 40 is integrally formed with the cabinet body 10 and covers the second opening 102. A sealing structure is provided between the back plate 40 and the periphery of the second opening 102, and a connecting structure is provided on the inner side of the back plate 40 corresponding to the position of the connecting portion 14;

[0041] Wherein, the connecting portion 14 and the battery mounting rack are staggeredly arranged in the direction from the first opening 101 to the second opening 102 so as to be able to connect and fix the connecting structure and the connecting portion 14 from the first opening 101.

[0042] Specifically, during production, the cabinet 10, the first cabinet door 20 and the back plate 40 can be formed separately. Since the first opening 101 and the second opening 102 are provided on opposite sides of the cabinet 10, the sealing of the cabinet 10 can be better ensured, and the production difficulty can be reduced, thereby reducing the production cost. When the connecting portion 14 and the battery mounting frame are staggered in the direction from the first opening 101 to the second opening 102, the connecting portion 14 can be exposed from the first opening 101, and the battery mounting frame can be prevented from blocking the connecting portion 14. Therefore, when the back plate 40 is fixed, the connecting structure on the back plate 40 can be connected and fixed to the connecting portion 14 from the first opening 101. In this way, the connecting portion 14 of the back plate 40 and the cabinet 10 can be located inside the cabinet 10, avoiding the situation where others remove the back plate 40 from the outside. Since the back plate 40 and the cabinet 10 are fixed by assembly, there are many types of sealing structures to choose from, and it is easy to ensure sealing.

[0043] The technical solution of the utility model is to set a first opening 101 and a second opening 102 relative to each other on the cabinet 10, set a first cabinet door 20 at the first opening 101, and seal the second opening 102 by a cover plate, so that it is easy to form the cabinet 10, and the cost can be reduced while the sealing of various parts of the cabinet 10 can be better. Since the connection structure is set on the inner side of the cover plate, it is connected and fixed with the connection part 14 in the cabinet 10 through the connection structure, which avoids the situation of setting screw holes between the cabinet 10 and the cover plate, and can improve the sealing of the cover plate and the cabinet 10. At the same time, there are more optional forms of the sealing structure between the cabinet 10 and the cover plate, which is more conducive to ensuring the sealing between the cabinet 10 and the cover plate. Thereby, it is easy to form the cabinet 10, reduce the production cost of the battery cabinet, improve the waterproofness of the battery cabinet, and reduce the risk of water entering the battery cavity 11.

[0044] In some embodiments, the connection portion 14 is provided with a first through hole 143, the connection structure has a stud 421, and the battery cabinet further includes a locking nut, the stud 421 passes through the first through hole 143, the locking nut is screwed on the stud 421, and is located on the side of the connection portion 14 away from the back plate 40. That is, each connection portion 14 is provided with a first through hole 143, and the connection structure is provided with a stud 421 corresponding to each first through hole 143. During installation, each stud 421 passes through the corresponding first through hole 143 one by one, and then the locking nut is locked on the stud 421 in the battery cavity 11 through the first opening 101, so that the cover plate is fixed to the cabinet 10. Such a structure is simple, easy to install, and can make the cover plate firmly fixed, reducing the risk of the cover plate loosening. Of course, in other embodiments, the connection structure is provided with a buckle or a rivet to be clamped or riveted on the connection portion 14. The connection structure can also be welded and fixed to the connection portion 14.

[0045] In some embodiments, the connection structure includes a mounting member 41 and a threaded member. The mounting member 41 is mounted on the inner side of the back plate 40. The mounting member 41 is provided with a plurality of second through holes 411. The threaded member includes a stud 421 and a limiting portion provided at one end of the stud 421. The stud 421 passes through the second through holes 411, and the limiting portion is located on the side of the mounting member 41 facing the back plate 40. Specifically, the size of the limiting portion is larger than the diameter of the first through hole 143. With such a setting, the connection area between the mounting member 41 and the cover plate can be relatively large, and the structural strength of the cover plate can be enhanced through the mounting member 41, reducing the risk of deformation of the cover plate under stress. Moreover, during installation, a plurality of threaded members can be uniformly arranged in the second through holes 411, without the need to fix the threaded members one by one, which is convenient for installation. Among them, the mounting member 41 and the back plate 40 can be welded or fixed by screws.

[0046] In some embodiments, the connection structure includes a plurality of mounting members 41. The plurality of mounting members 41 are arranged in one-to-one correspondence with the respective side edges of the first opening 101. Each mounting member 41 is provided with a plurality of second through holes 411, and each second through hole 411 is provided with a threaded member. In this way, a strip-shaped mounting member 41 can be used for installation, which can simplify the structure of the mounting member 41 and is beneficial to reducing the production difficulty and cost.

[0047] In some embodiments, a groove 412 is provided on the side of the mounting member 41 facing the back plate 40. The plurality of second through holes 411 on the mounting member 41 are all located in the groove 412, and the limiting portion is located in the groove 412. In this way, the limiting portion can be received through the groove 412, enabling the mounting member 41 to be in full contact with the cover plate and enhancing the connection stability between the cover plate and the mounting member 41.

[0048] In some embodiments, the connecting portion 14 includes a fixing plate and a connecting plate that are perpendicularly connected to each other. The fixing plate is connected to the cabinet body 10, and the connecting plate is provided with a first through hole 143. That is, the connecting portion 14 can be integrally formed with the cabinet body 10 separately. During installation, the fixing plate is welded to the cabinet body 10. In this way, the structure of the connecting portion 14 can be simple, and the installation position of the connecting portion 14 is relatively flexible, facilitating installation according to the actual situation of the cabinet body 10.

[0049] In some embodiments, the sealing structure includes at least one sealing ring 43, which is disposed around the first opening 101 and abuts between the first opening 101 and the back plate 40. Specifically, the sealing ring 43 is disposed outside the connecting structure. The material of the sealing ring 43 can be rubber or silica gel. During installation, the sealing ring 43 can be first bonded to the periphery of the first opening 101, or the sealing ring 43 can be first bonded to the back plate 40 and then the back plate 40 is installed. In this way, no additional installation structure needs to be provided at the periphery of the first opening 101 and the back plate 40, which can simplify the structures of the cabinet body 10 and the back plate 40 and reduce the production cost of the battery cabinet. Of course, in other embodiments, the sealing structure is disposed on the cabinet body 10 or the back plate 40 and has an annular groove 412, and a sealant is provided in the annular groove 412.

[0050] In some embodiments, the battery cavity 11 has two opposite cavity side walls. The battery mounting rack includes a plurality of support plates 51. A plurality of support plates 51 are provided on both cavity side walls. The plurality of support plates 51 on the same cavity side wall are spaced apart in the vertical direction, and the plurality of support plates 51 on the two cavity side walls are opposite to each other to form a battery placement position on the opposite support plates 51 on the two cavity side walls; the connecting portion 14 is disposed corresponding to the position between two adjacent support plates 51. That is, when installing the battery box 71, one side of the bottom of the battery box 71 is supported on the support plate 51 of one cavity side wall, and the other side of the bottom of the battery box 71 is supported on the support plate 51 of the other cavity side wall. In this way, the structure of the battery mounting rack is simple and has a light weight, which is beneficial to reducing the weight of the battery cabinet.

[0051] In some embodiments, the battery mounting rack further includes a plurality of support frames 52, and the support frames 52 are fixed to the cabinet body 10 and are located below the support plates 51 to support the support plates 51. In this way, the support stability of the support plates can be improved.

[0052] In some embodiments, the cabinet body 10 further has an electric control cavity 12, an installation cavity 13 and a third opening 103. The electric control cavity 12 is located below the battery cavity 11, the installation cavity 13 is located between the battery cavity 11 and the electric control cavity 12, the installation cavity 13 is used for installing the liquid cooling module 81, and the electric control cavity 12 is used for installing circuit devices; the third opening 103 is located below the first opening 101 and communicates the installation cavity 13 and the electric control cavity 12. When the first cabinet door 20 is in the closed state, it covers the first opening 101 and the third opening 103. In this way, the first opening 101 and the third opening 103 can be simultaneously covered or opened by the first cabinet door 20, which is convenient for maintenance and can also reduce the number of cabinet doors and simplify the structure of the battery cabinet.

[0053] In some embodiments, the cabinet body 10 further has a fourth opening 104, which is located below the second opening 102 and communicates with the installation cavity 13 and the electronic control cavity 12. The battery cabinet further includes a second cabinet door 30, which is rotatably installed at the fourth opening 104 to cover or open the fourth opening 104. In this way, during actual use, the liquid cooling module 81 and the circuit device can be overhauled and maintained by opening the second cabinet door 30.

[0054] In some embodiments, the first cabinet door 20 is provided with a first ventilation opening 21 corresponding to the positions of the installation cavity 13 and the electronic control cavity 12, and the second cabinet door 30 is provided with a second ventilation opening 31 corresponding to the positions of the installation cavity 13 and the electronic control cavity 12, so as to facilitate heat dissipation of the electronic control cavity 12 and the installation cavity 13.

[0055] In some embodiments, the cabinet has a battery cavity 11 and an electronic control cavity 12 located below the battery cavity 11. The cabinet is provided with a first ventilation opening 21 and a second ventilation opening 31. The first ventilation opening 21 and the second ventilation opening 31 are respectively arranged on opposite sides of the electronic control cavity 12 and are both communicated with the electronic control cavity 12. The battery cabinet further includes at least one heat insulation plate 61, which is vertically installed in the electronic control cavity 12 to divide the electronic control cavity 12 into multiple vertical chambers in the width direction of the cabinet. The heat insulation plate 61 extends from the first ventilation opening 21 towards the second ventilation opening 31.

[0056] Specifically, the vertical chambers are used to install modules such as the high-voltage box 72 and the energy storage converter 73. The heat insulation plate 61 is integrally formed with the cabinet, that is, during installation, the installation position of the heat insulation plate 61 in the electronic control cavity 12 can be rotated according to actual needs. Since modules such as the high-voltage box 72 and the energy storage converter 73 are directly supported by the bottom of the cabinet when installed in the vertical chambers and do not require support from the heat insulation plate 61, the requirements for the installation structure of the heat insulation plate 61 are not high. Even the heat insulation plate 61 does not need to be connected to the cabinet body 10, and the heat insulation plate 61 can be separated between adjacent two modules. Among them, the heat insulation plate 61 can be made of heat insulation materials such as heat insulation foam.

[0057] The technical solution of the present utility model is to arrange the electronic control cavity 12 below the battery cavity 11, and vertically install at least one heat insulation plate 61 in the electronic control cavity 12. The heat insulation plate 61 is used to divide the electronic control cavity 12 into multiple vertical chambers in the width direction of the cabinet, and the heat insulation plate 61 extends from the first ventilation opening 21 on one side of the cabinet to the second ventilation opening 31 on the other side of the cabinet. With such an arrangement, modules such as the high-voltage box 72 can be directly supported by the bottom wall of the cabinet without the need for the heat insulation plate 61 for support. Therefore, the installation structure requirements for the heat insulation plate 61 are not high, and even the heat insulation plate 61 does not need to be connected to the cabinet body 10, which can simplify the structure of the heat insulation plate 61 while ensuring the heat insulation performance as much as possible. Moreover, the heat insulation plate 61 can be flexibly set according to actual needs, enabling the heat insulation plate 61 to be as close as possible to modules such as the high-voltage box 72, so as to make full use of the space of the electronic control cavity 12, improve the structural compactness of the electronic control cavity 12, and is beneficial to reducing the height of the cabinet body 10 or increasing the accommodation quantity of the battery box 71 at the same height.

[0058] In some embodiments, the battery cabinet includes at least two heat insulation plates 61, and the heat insulation plates 61 are arranged at intervals in the width direction of the cabinet to divide the electronic control cavity 12 into at least three vertical chambers in the width direction of the cabinet. In this way, the number of vertical chambers can be relatively large, enabling multiple modules to be installed separately. For example, in some embodiments, the number of heat insulation plates 61 is two, so as to divide the electronic control cavity 12 into three vertical chambers, one of which is used to install the high-voltage box 72, one is used to install the energy storage converter 73, and one is used to install the electronic control module 74.

[0059] In some embodiments, the battery cabinet further includes an air guide cylinder 62. One end of the air guide cylinder 62 is communicated with the vertical chamber between the two heat insulation plates 61, and the other end extends to the second ventilation opening 31. After the air guide cylinder 62 is installed corresponding to the middle vertical chamber in this way, air ducts corresponding to the two side vertical chambers can be formed between the air guide cylinder 62 and the two side walls of the cabinet, which can reduce the number of components of the battery cabinet and the installation procedures. At the same time, the size of the heat insulation plate 61 can be reduced.

[0060] Of course, in other embodiments, the heat insulation plate 61 extends from the first ventilation opening 21 to the second ventilation opening 31. In this way, the number of components of the battery cabinet can be reduced and the installation procedures can be simplified.

[0061] In some embodiments, the cabinet includes a cabinet body 10, a first cabinet door 20 and a second cabinet door 30. The first cabinet door 20 is installed on the front side of the cabinet body 10 and is provided with a first ventilation opening 21, and the second cabinet door 30 is installed on the rear side of the cabinet body 10 and is provided with a second ventilation opening 31. In this way, air can enter through one of the first ventilation opening 21 and the second ventilation opening 31 and exit through the other, which is convenient for the heat dissipation of the electronic control cavity 12. And setting the ventilation openings on the cabinet doors can simplify the structure of the cabinet body 10.

[0062] In some embodiments, the cabinet further has an installation cavity 13, which is located between the battery cavity 11 and the electronic control cavity 12, and the installation cavity 13 is used to install the liquid cooling module 81. By arranging the installation cavity 13 between the electronic control cavity 12 and the battery cavity 11, during use, the liquid cooling module 81 can be made closer to the battery box 71, which can reduce the pipeline length, reduce energy loss, and improve the heat dissipation effect.

[0063] In some embodiments, the cabinet body 10 is provided with a first opening 101, a third opening 103, and a fourth opening 104. The first opening 101 communicates with the installation cavity 13. The third opening 103 is located below the first opening 101, and both the electronic control cavity 12 and the installation cavity 13 communicate with the third opening 103. The fourth opening 104 is opposite to the third opening 103, and both the electronic control cavity 12 and the installation cavity 13 communicate with the fourth opening 104. The first cabinet door 20 covers the first opening 101 and the third opening 103, and the second cabinet door 30 covers the fourth opening 104.

[0064] In some embodiments, a heat insulation layer is provided at the position of the first cabinet door 20 corresponding to the first opening 101, and the back plate 40 is provided with a heat insulation layer. In this way, the influence of the ambient temperature on the battery box 71 in a high-temperature environment (such as a sunny day outdoors in summer) can be reduced. Optionally, heat insulation structures are provided at the top and side of the cabinet body 10.

[0065] In some embodiments, sealing rubber rings are provided at the periphery of the first opening 101, the periphery of the third opening, and the periphery of the fourth opening 104. In this way, the sealing performance between the first cabinet door 20 and the cabinet body 10 can be improved, the risk of water ingress into the cabinet body 10 can be reduced, and the structure is simple and the cost is low.

[0066] In some embodiments, two vertical air guiding plates 63 are provided in the installation cavity 13, and the two vertical air guiding plates 63 are spaced apart to form an air guiding channel. One end of the air guiding channel is used to communicate with the heat dissipation outlet of the liquid cooling module 81, and the other end extends to the second ventilation opening 31. In this way, the hot air after passing through the liquid cooling module 81 is directly sent out from the second ventilation opening 31, avoiding reflux into the cabinet body 10, and the heat dissipation effect can be improved.

[0067] The present utility model also proposes a cabinet-type energy storage system, which includes a battery box 71 and a battery cabinet. The specific structure of the battery cabinet refers to the above embodiments. Since this cabinet-type energy storage system adopts all the technical solutions of the above all embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated here one by one. Among them, the battery box 71 is arranged in the battery cavity 11 of the battery cabinet. Optionally, the number of battery boxes 71 is multiple, and multiple battery boxes 71 are all arranged in the battery cavity 11 of the battery cabinet.

[0068] In some embodiments, the cabinet - type energy storage system further includes a high - voltage box 72 and a power conversion system (PCS) 73. At least two vertical chambers are formed in the electrical control cavity 12 of the battery cabinet, and the high - voltage box 72 and the PCS 73 are respectively arranged in one vertical chamber.

[0069] In some embodiments, the cabinet - type energy storage system further includes a liquid - cooling system, a circuit device, and a plurality of battery boxes 71. The battery cabinet includes a cabinet body, which has a battery cavity 11, an electrical control cavity 12, and an installation cavity 13 located between the battery cavity 11 and the electrical control cavity 12. A plurality of battery positions are provided in the battery cavity 11 in the up - and - down direction; each battery box 71 is horizontally placed corresponding to one battery position, and each is provided with a liquid - cooling flow channel; the liquid - cooling system includes a liquid supply pipe, a liquid return pipe, and a liquid - cooling module 81. The liquid - cooling module 81 is horizontally placed in the installation cavity 13 and is connected to the liquid - cooling flow channels of the battery boxes 71 through the liquid supply pipe and the liquid return pipe. The liquid supply pipe and the liquid return pipe are respectively arranged on opposite sides of the battery cavity 11; the circuit device is arranged in the electrical control cavity 12, and the circuit device is connected to the battery boxes 71 and the liquid - cooling module 81.

[0070] Specifically, one end of the liquid supply pipe is communicated with the liquid outlet of the liquid - cooling module 81. A plurality of liquid supply branch pipes are provided on the liquid supply pipe, and each liquid supply branch pipe is correspondingly connected to the inlet end of the liquid - cooling flow channel of one battery box 71. One end of the liquid return pipe is communicated with the liquid return port of the liquid - cooling module 81. A plurality of liquid return branch pipes are provided on the liquid return pipe, and each liquid return branch pipe is correspondingly connected to the outlet end of the liquid - cooling flow channel of one battery box 71.

[0071] The technical solution of the present utility model is to sequentially arrange the battery cavity 11, the installation cavity 13, and the electrical control cavity 12 from top to bottom in the cabinet, and install the liquid - cooling module 81 in the installation cavity 13. In this way, the distance between the liquid - cooling module 81 and the installation cavity 13 can be relatively close, which can shorten the pipeline length between the liquid - cooling module 81 and the battery cavity 11, thus being beneficial to reducing the loss of the coolant during the flow process. At the same time, a plurality of vertically - distributed battery positions are set in the battery cavity 11, and each battery box 71 is horizontally placed corresponding to one battery position, while the liquid supply pipe and the liquid return pipe are respectively arranged on opposite sides of the battery cavity 11. In this way, the lengths of both the liquid supply pipe and the liquid return pipe can be relatively short, which can reduce the loss of the coolant during the flow process, enable the coolant to fully exchange heat with the battery boxes 71, and improve the heat - dissipation effect on the battery boxes 71.

[0072] In some embodiments, two heat - insulating plates 61 are vertically arranged in the electrical control cavity 12. The two heat - insulating plates 61 are arranged at intervals in the width direction of the cabinet to divide the electrical control cavity 12 into three vertical chambers. The circuit device includes a high - voltage box 72, a PCS 73, and a control module. The high - voltage box 72, the PCS 73, and the control module are respectively arranged in one vertical chamber.

[0073] Optionally, one of the high-voltage box 72 and the energy storage converter 73 is disposed in the vertical chamber between the two heat insulation plates 61. The cabinet further includes an air guide cylinder 62. One end of the air guide cylinder 62 communicates with the vertical chamber between the two heat insulation plates 61, and the other end extends to the fourth opening 104.

[0074] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A battery cabinet, characterized in that: include: A cabinet having a battery cavity, a first opening and a second opening, wherein the first opening and the second opening are respectively arranged on opposite sides of the cabinet and are both connected to the battery cavity, a plurality of connecting parts are arranged on the periphery of the second opening, and a battery mounting frame is arranged in the battery cavity; A first cabinet door is rotatably mounted at the first opening and has a closed state covering the first opening and an open state opening the first opening; A back plate, which is formed separately from the cabinet body and covers the second opening, a sealing structure is provided between the back plate and the periphery of the second opening, and a connecting structure is provided at a position on the inner side of the back plate corresponding to the connecting portion; The connecting portion and the battery mounting frame are staggered in a direction from the first opening to the second opening, so that the connecting structure can be connected and fixed to the connecting portion from the first opening.

2. The battery cabinet according to claim 1, characterized in that: The connecting portion is provided with a first through hole, the connecting structure has a stud, and the battery cabinet further includes a locking nut, the stud passes through the first through hole, the locking nut is screwed on the stud and is located on a side of the connecting portion away from the back plate.

3. The battery cabinet according to claim 2, characterized in that: The connection structure includes a mounting member and a threaded member, the mounting member is mounted on the inner side of the back plate, the mounting member is provided with a plurality of second through holes, the threaded member includes the stud and a limiting portion provided at one end of the stud, the stud is passed through the second through hole, and the limiting portion is located on the side of the mounting member facing the back plate.

4. The battery cabinet according to claim 3, characterized in that: The connection structure includes a plurality of the mounting members, and the plurality of the mounting members are arranged in one-to-one correspondence with the respective sides of the first opening. Each of the mounting members is provided with a plurality of the second through holes, and each of the second through holes is provided with a threaded member.

5. The battery cabinet according to claim 3, characterized in that: A groove is provided on a side of the mounting member facing the back plate, a plurality of the second through holes on the mounting member are all located in the groove, and the limiting portion is located in the groove.

6. The battery cabinet according to claim 2, characterized in that: The connecting portion includes a fixing plate and a connecting plate which are vertically connected to each other, the fixing plate is connected to the cabinet, and the connecting plate is provided with the first through hole.

7. The battery cabinet according to claim 1, characterized in that: The sealing structure includes at least one sealing ring, which is arranged around the first opening and abuts between the first opening and the back plate.

8. The battery cabinet according to claim 1, characterized in that: The battery cavity has two opposite cavity side walls, and the battery mounting frame includes a plurality of support plates. The two cavity side walls are each provided with a plurality of support plates, and the plurality of support plates on the same cavity side wall are spaced apart in the up and down directions, and the plurality of support plates on the two cavity side walls are opposite to each other one by one to form a battery placement position on the opposite support plates on the two cavity side walls; the connecting portion is arranged corresponding to the position between two adjacent support plates.

9. The battery cabinet according to claim 1, characterized in that: The cabinet further comprises an electric control cavity, an installation cavity, a third opening and a fourth opening, wherein the electric control cavity is located below the battery cavity, the installation cavity is located between the battery cavity and the electric control cavity, the installation cavity is used to install a liquid cooling module, and the electric control cavity is used to install a circuit device; The third opening is located below the first opening and communicates with the installation cavity and the electric control cavity. The fourth opening is located below the second opening and communicates with the installation cavity and the electric control cavity. The first cabinet door covers the first opening and the third opening when the first cabinet door is in a closed state. The battery cabinet further includes a second cabinet door, which is rotatably installed at the fourth opening to cover or open the fourth opening. The first cabinet door is provided with a first ventilating opening at positions corresponding to the installation cavity and the electric control cavity, and the second cabinet door is provided with a second ventilating opening at positions corresponding to the installation cavity and the electric control cavity.

10. A cabinet-type energy storage system, characterized in that: The invention comprises a plurality of battery boxes and a battery cabinet as claimed in any one of claims 1 to 9, wherein the plurality of battery boxes are arranged in a battery cavity of the battery cabinet.

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