Battery and engineering machinery

Abstract

The invention provides a battery and engineering machinery. The battery includes a battery cell. The battery unit comprises a battery box body, a battery module and an anti-explosion valve. The battery case includes a bottom plate and a plurality of side plates extending in a circumferential direction of the bottom plate. A containing cavity is defined by the bottom plate and the side plates. The battery modules are arranged in the accommodating cavity, and each battery module comprises a plurality of single batteries; and at least one side plate in the plurality of side plates comprises a smoke exhaust cavity. The smoke exhaust cavity comprises an inner cavity, a flue hole formed in the cavity wall, close to one side of the containing cavity, of the smoke exhaust cavity, and a smoke exhaust hole formed in the cavity wall, away from one side of the containing cavity, of the smoke exhaust cavity. The explosion-proof valve is mounted at the smoke exhaust hole, a flue is formed in an inner cavity of the smoke exhaust cavity, and when the battery module is subjected to thermal runaway, a high-temperature and high-pressure medium enters the flue through the flue hole and acts on the explosion-proof valve. According to the battery unit provided by the embodiment of the invention, the use safety of the battery is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery and engineering machinery. Background Art

[0002] With the continuous upgrading and breakthrough of new energy technology, the electrification of construction machinery has become an important trend in the development of the industry. As the core component of electrified construction machinery, the performance and reliability of batteries directly affect the overall efficiency and operation safety of construction machinery.

[0003] Therefore, how to improve the safety of battery use is an urgent problem to be solved.

[0004] It should be noted that the statements in this background technology section only provide background technology related to the present application and do not necessarily constitute prior art. Summary of the invention

[0005] The present application provides a battery and engineering machinery to improve safety in use.

[0006] In a first aspect, the present application provides a battery, including a battery cell, wherein the battery cell includes:

[0007] The battery box comprises a bottom plate and a plurality of side plates extending in a circumferential direction of the bottom plate, wherein the bottom plate and the plurality of side plates enclose a receiving cavity;

[0008] A battery module is disposed in the accommodating cavity and includes a battery cell;

[0009] At least one of the plurality of side panels comprises a smoke exhaust cavity, the smoke exhaust cavity comprising an inner cavity, a flue hole arranged on a cavity wall of the smoke exhaust cavity close to a side of the accommodating cavity, and a smoke exhaust hole arranged on a cavity wall of the smoke exhaust cavity away from a side of the accommodating cavity; and

[0010] The explosion-proof valve is installed at the smoke exhaust hole. The inner cavity of the smoke exhaust cavity forms a flue. When thermal runaway occurs in the battery module, the high-temperature and high-pressure medium enters the flue through the flue hole and acts on the explosion-proof valve.

[0011] In some embodiments, the battery box is a rectangular parallelepiped structure, and the multiple side panels include two first side panels spaced apart in the length direction and two second side panels spaced apart in the width direction, and at least one of the two second side panels includes a smoke exhaust cavity.

[0012] In some embodiments, the flue extends in the length direction, and the smoke exhaust cavity includes a plurality of flue holes and a plurality of smoke exhaust holes spaced apart in the length direction. In the length direction, the plurality of flue holes and the plurality of smoke exhaust holes are staggered.

[0013] In some embodiments, flue holes are respectively arranged on both sides of each smoke exhaust hole so that the high-temperature and high-pressure medium flowing into the flue from the flue holes on both sides acts on the explosion-proof valve at the same smoke exhaust hole.

[0014] In some embodiments, end surfaces at both ends of the second side plate are respectively abutted against the two first side plates so that both ends of the second side plate are closed.

[0015] In some embodiments, the battery case also includes a plurality of partitions arranged in the accommodating cavity, the plurality of partitions divide the accommodating cavity into at least two accommodating sub-cavities, the battery unit includes at least two battery modules, the at least two battery modules are correspondingly arranged in at least two accommodating sub-cavities, and a partition is respectively arranged at both ends of each battery module.

[0016] In some embodiments, the base plate includes a liquid cooling plate having a flow channel for circulating a heat exchange medium, and the battery includes at least two battery cells stacked in a height direction, and two adjacent battery cells are connected to each other via a liquid path connector.

[0017] In some embodiments, each battery cell includes a liquid inlet pipe arranged on the upper side of the liquid cooling plate and a liquid inlet intermediate pipe arranged on the lower side of the liquid cooling plate, the liquid inlet pipe and the liquid inlet intermediate pipe are used to introduce heat exchange medium into the liquid cooling plate, and the liquid inlet intermediate pipe extends into the battery case of an adjacent battery cell to be connected to the liquid inlet pipe of the adjacent battery cell; and / or, the battery cell also includes a liquid outlet pipe arranged on the upper side of the liquid cooling plate and a liquid outlet intermediate pipe arranged on the lower side of the liquid cooling plate, the liquid outlet pipe and the liquid outlet intermediate pipe are used to export the heat exchange medium from the liquid cooling plate, and the liquid outlet intermediate pipe extends into the battery case of an adjacent battery cell to be connected to the liquid outlet pipe of the adjacent battery cell.

[0018] In some embodiments, the liquid inlet pipe and the liquid inlet intermediate pipe both extend in the height direction and are coaxially arranged, and the liquid circuit connector includes a liquid inlet connector, which is connected to the upper end of the liquid inlet pipe to connect with the liquid inlet intermediate pipe of the adjacent battery cell located on the upper side; and / or, the liquid outlet pipe and the liquid outlet intermediate pipe both extend in the height direction and are coaxially arranged, and the liquid circuit connector includes a liquid outlet connector, which is connected to the upper end of the liquid outlet pipe to connect with the liquid outlet intermediate pipe of the adjacent battery cell located on the upper side.

[0019] In some embodiments, the battery case further includes a partition disposed in the accommodating cavity, the partition and part of the side panels among the multiple side panels enclose an isolation cavity, and the liquid inlet pipe and the liquid outlet pipe are both disposed in the isolation cavity to be isolated from the battery module.

[0020] In some embodiments, the battery includes at least two battery cells stacked in the height direction and an electrical connector, the electrical connector electrically connects two adjacent battery cells, and the electrical connector includes a connector socket and a connector plug, the connector plug is arranged on the bottom plate of the battery case and includes a pin located on the lower side of the bottom plate, the pin extends into the battery case of the adjacent battery cell to be directly inserted into the socket of the connector socket located in the battery case of the adjacent battery cell.

[0021] In some embodiments, the connector socket includes a socket body and a guide positioning device disposed on the socket body, and the connector plug includes a plug body and a guide groove disposed on the plug body, and the guide positioning device and the guide groove cooperate for positioning.

[0022] A second aspect of the present application provides an engineering machine, comprising the above-mentioned battery, wherein the battery is used to provide electrical energy.

[0023] Based on the technical solution provided in the present application, the battery includes a battery cell. The battery cell includes a battery case, a battery module and an explosion-proof valve. The battery case includes a bottom plate and a plurality of side plates extending in the circumferential direction of the bottom plate. The bottom plate and the plurality of side plates enclose a receiving cavity. The battery module is arranged in the receiving cavity and each battery module includes a plurality of battery cells. Among them, at least one of the plurality of side plates includes a smoke exhaust cavity. The smoke exhaust cavity includes an inner cavity, a flue hole arranged on the cavity wall of the smoke exhaust cavity close to the receiving cavity side, and a smoke exhaust hole arranged on the cavity wall of the smoke exhaust cavity away from the receiving cavity side. The explosion-proof valve is installed at the smoke exhaust hole, and the inner cavity of the smoke exhaust cavity forms a flue. When thermal runaway occurs in the battery module, the high-temperature and high-pressure medium enters the flue through the flue hole and acts on the explosion-proof valve. The battery unit of the embodiment of the present application forms a hollow structure by forming the side panel of the battery case, that is, a flue is formed inside the side panel. In this way, when the battery module in the battery case suffers from thermal runaway, the high-temperature and high-pressure medium discharged can directly enter the flue through the flue hole and further act on the explosion-proof valve, thereby avoiding the disorderly flow of the high-temperature and high-pressure medium in the battery case, and further avoiding the explosion of other battery modules. In other words, the battery unit of the embodiment of the present application forms a flue in the side panel of the battery case, which is beneficial to the discharge of the high-temperature and high-pressure medium and improves the safety of battery use.

[0024] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0026] Figure 1 This is a schematic diagram of the structure of a battery unit according to some embodiments of the present application.

[0027] Figure 2 for Figure 1 A schematic diagram of the longitudinal cross-sectional structure of a battery cell is shown.

[0028] Figure 3 for Figure 1 Schematic diagram of the internal structure of a battery cell shown.

[0029] Figure 4 for Figure 1 Schematic diagram of the exploded structure of the battery cell shown.

[0030] Figure 5 for Figure 4 Schematic diagram of the structure of the battery box.

[0031] Figure 6 This is a schematic cross-sectional diagram of a flue in a battery cell according to some embodiments of the present application.

[0032] Figure 7 for Figure 4 A schematic diagram of the side view of the plug of the China Electric connector.

[0033] Figure 8 for Figure 4 A schematic diagram of the top view of the plug of the China Electric connector.

[0034] Fig. 9 for Figure 4 A schematic diagram of the side view of the socket of the China Electric connector.

[0035] Fig.10 for Figure 4 Schematic diagram of the top view of the socket of the China Electric connector.

[0036] Fig.11 Schematic diagram of the fluid and electrical connections between adjacent battery cells of the battery of some embodiments of the present application.

[0037] Reference numerals:

[0038] 100. Battery cell;

[0039] 1. Battery box; 11. Side panel; 1101. Smoke exhaust hole; 1102. Flue hole; 111. First side panel; 112. Second side panel; 12. Partition panel; 13. Bottom panel; 131. Liquid inlet pipe; 132. Liquid inlet intermediate pipe; 133. Liquid outlet pipe; 134. Liquid outlet intermediate pipe; 14. Guide positioning assembly; 141. Guide positioning pin; 142. Guide positioning hole; 15. Upper sealing surface; 16. Lower sealing surface; 17. Bolt hole; 18. Bolt connection through hole; 19. Sealing gasket mounting groove;

[0040] 2. Bracket assembly; 21. Water inlet pipe connector bracket; 22. Water outlet pipe connector bracket; 23. High and low pressure connector bracket;

[0041] 3. Liquid circuit connector; 31. Liquid inlet connector; 311. First liquid inlet quick plug; 312. Second liquid inlet quick plug; 32. Liquid outlet connector; 321. First liquid outlet quick plug; 322. Second liquid outlet quick plug;

[0042] 4. Electrical connector; 41. Connector socket; 411. Socket body; 412. Guide and positioning device; 413. Socket PE structure; 414. High-voltage connection socket; 415. Low-voltage connection socket; 42. Connector plug; 421. Plug body; 422. Connector guide groove; 423. Plug PE structure; 424. High-voltage connection plug; 425. Low-voltage connection plug;

[0043] 5. Manual maintenance switch assembly;

[0044] 6. Battery module;

[0045] 7. Explosion-proof valve;

[0046] 8. Sealing gasket;

[0047] 9. Pull the board;

[0048] 10. Upper cover;

[0049] 101, upper heat conducting layer;

[0050] 102, lower heat conducting layer;

[0051] 103. Fasteners. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0053] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0054] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, and the spatially relative descriptions used here are interpreted accordingly.

[0055] Batteries generate a lot of heat during use, and when the heat cannot be dissipated in time, it is easy to cause thermal runaway. In addition, other reasons such as battery aging can also cause thermal runaway. In the event of thermal runaway, high-temperature and high-pressure gases will be discharged to the outside of the battery cell through the pressure relief structure on the battery cell. If a battery module has thermal runaway, its high-temperature and high-pressure gas cannot be discharged in time, which may cause other battery modules to explode. Therefore, effectively discharging high-temperature and high-pressure gases is an important means to improve the safety of battery use. Based on the above considerations, the present application provides a flue in the side panel of the battery box of the battery unit, so that if thermal runaway occurs at any position in the battery box, it can flow through the flue hole into the flue of the smoke exhaust cavity and then act on the explosion-proof valve to complete the discharge, without flowing to other areas in the battery box, thereby causing greater danger.

[0056] refer to Figures 1 to 6, the embodiment of the present application provides a battery including a battery cell 100. The battery cell 100 includes a battery case 1, a battery module 6 and an explosion-proof valve 7. The battery case 1 includes a bottom plate 13 and a plurality of side plates 11 extending in the circumferential direction of the bottom plate 13. The bottom plate 13 and the plurality of side plates 11 enclose a receiving cavity A. The battery module 6 is arranged in the receiving cavity and each battery module 6 includes a plurality of battery cells. Among them, at least one side plate 11 of the plurality of side plates 11 includes a smoke exhaust cavity. The smoke exhaust cavity includes an inner cavity, a flue hole 1102 arranged on the cavity wall of the smoke exhaust cavity close to the receiving cavity side, and a smoke exhaust hole 1101 arranged on the cavity wall of the smoke exhaust cavity away from the receiving cavity side. The explosion-proof valve 7 is installed at the smoke exhaust hole 1101, and the inner cavity of the smoke exhaust cavity forms a flue. When thermal runaway occurs in the battery module 6, the high-temperature and high-pressure medium enters the flue through the flue hole 1102 and acts on the explosion-proof valve 7.

[0057] like Figure 4 As shown, the battery unit 100 of some embodiments includes a battery case 1 and a plurality of battery modules 6 disposed in the battery case 1. Each battery module 6 includes a plurality of battery cells. A battery cell is the smallest unit of a battery, and the battery cell includes a housing, an electrode assembly disposed in the housing, and an electrolyte. The electrode assembly is formed by winding or stacking a positive electrode sheet and a negative electrode sheet. A pressure relief structure is provided on the housing for pressure relief when thermal runaway occurs in the battery cell.

[0058] like Figure 5 and Figure 6 As shown, the battery box 1 includes a side plate. The side plate is a hollow structure, which includes a smoke exhaust cavity, so that the inner cavity of the smoke exhaust cavity forms a flue. Then, when any battery module in the battery box 1 has thermal runaway, high-temperature and high-pressure gas can enter the flue through the flue hole 1102 and act on the explosion-proof valve 7 through the flue.

[0059] The battery cell 100 of the embodiment of the present application forms the side panel of the battery case 1 into a hollow structure, that is, a flue is formed inside the side panel. In this way, when the battery module in the battery case 1 suffers from thermal runaway, the high-temperature and high-pressure medium discharged can directly enter the flue through the flue hole and further act on the explosion-proof valve 7, thereby avoiding the disorderly flow of the high-temperature and high-pressure medium in the battery case 1 and further avoiding the explosion of other battery modules. That is to say, the battery cell 100 of the embodiment of the present application forms a flue in the side panel of the battery case 1, which is beneficial to the discharge of the high-temperature and high-pressure medium and improves the safety of battery use.

[0060] refer to Figure 5In some embodiments, the battery box 1 is a rectangular parallelepiped structure. The plurality of side panels 11 include two first side panels 111 spaced apart in the length direction X and two second side panels 112 spaced apart in the width direction Y. At least one of the two second side panels 112 includes a smoke exhaust cavity.

[0061] like Figure 5 As shown, in a specific embodiment, the first side plate 111 extends along the width direction Y, and the two first side plates 111 are arranged in parallel and spaced apart. The second side plate 112 extends along the length direction X, and the two second side plates 112 are arranged in parallel and spaced apart. The two first side plates 111 and the two second side plates 112 are enclosed in the circumferential direction to form a rectangular battery box 1. Figure 6 As shown, both second side panels 112 include a smoke exhaust cavity. Of course, in other embodiments not shown in the drawings, only one second side panel may be provided with a smoke exhaust cavity. The second side panel 112 including a smoke exhaust cavity here means that the second side panel is a hollow structure, and its inner cavity forms a smoke duct. Figure 6 As shown, high temperature and high pressure gas flows into the flue through the flue hole 1102.

[0062] refer to Figure 5 In some embodiments, the flue extends along the length direction X. The smoke exhaust cavity includes a plurality of flue holes 1102 and a plurality of smoke exhaust holes 1101 spaced apart in the length direction X. In the length direction X, the plurality of flue holes 1102 and the plurality of smoke exhaust holes 1101 are staggered so that flue holes 1102 are respectively provided on both sides of each smoke exhaust hole 1101, so that the high-temperature and high-pressure medium flowing into the flue from the flue holes 1102 on both sides acts on the explosion-proof valve 7 at the same smoke exhaust hole 1101. This arrangement can reduce the number of explosion-proof valves. In other words, with a limited number of explosion-proof valves, more high-temperature and high-pressure media can be ensured to flow in.

[0063] In some embodiments, Figure 5 As shown, the battery box 1 also includes a partition 12 arranged in the accommodating chamber A. The partition 12 divides the accommodating chamber A into a plurality of accommodating sub-cavities. Each accommodating sub-cavity is used to place and accommodate a corresponding battery module. In addition, a flue hole 1102 is arranged in the range corresponding to each accommodating sub-cavity of the second side plate, so that any battery module can discharge high-temperature and high-pressure medium through the corresponding flue hole 1102 when thermal runaway occurs.

[0064] like Figure 5 As shown, in some embodiments, the end surfaces of both ends of the second side plate 112 are respectively abutted against the two first side plates 111 so that the two ends of the second side plate 112 are closed. The second side plate 112 is a hollow structure, and the end surfaces of both ends are open. The end surfaces of the second side plate 112 are abutted against the first side plate 111 so that the two ends of the flue are closed.

[0065] Similarly, the first side panel 111 of some embodiments of the present application is also a hollow structure, and reinforcing ribs are arranged inside. Compared with a solid structure, it can achieve lightweight while ensuring strength.

[0066] In some embodiments, the battery case 1 further includes a plurality of partitions 12 disposed in the accommodating chamber A. The plurality of partitions 12 divide the accommodating chamber A into at least two accommodating sub-cavities. The battery unit includes at least two battery modules 6. The at least two battery modules 6 are correspondingly disposed in at least two accommodating sub-cavities, and a partition 12 is disposed at both ends of each battery module 6.

[0067] like Figure 5 As shown, the partition 12 extends along the width direction Y and its two ends are respectively connected to the two second side plates 112 to divide the accommodating chamber A into a plurality of accommodating sub-cavities in the length direction X. A accommodating sub-cavity is formed between two adjacent partitions 12. Figure 5 In the illustrated embodiment, four partitions 12 are arranged in the accommodating chamber to divide the accommodating chamber A into three accommodating sub-chambers. Correspondingly, the battery unit of this embodiment includes three battery modules 6.

[0068] refer to Figure 6 In some embodiments, the bottom plate 13 includes a liquid cooling plate. The liquid cooling plate has a flow channel for circulating a heat exchange medium. The battery includes at least two battery cells 100 stacked in a height direction. The liquid cooling plates of two adjacent battery cells 100 are connected to each other through a liquid path connector 3.

[0069] The battery unit 100 of the embodiment of the present application can simplify the structure of the battery unit by forming the liquid cooling plate into the bottom plate 13. Furthermore, the liquid cooling plates of two adjacent battery units 100 are connected by a liquid circuit connector, which can save the liquid circuit connecting pipe between the two battery units, thereby simplifying the structure.

[0070] like Fig.11 As shown, in some embodiments, each battery unit 100 includes a liquid inlet pipe 131 disposed on the upper side of the liquid cooling plate and a liquid inlet intermediate pipe 132 disposed on the lower side of the liquid cooling plate. The liquid inlet pipe 131 and the liquid inlet intermediate pipe 132 are used to introduce heat exchange medium into the liquid cooling plate. Moreover, the liquid inlet intermediate pipe 132 extends into the battery box 1 of the adjacent battery unit to connect with the liquid inlet pipe of the adjacent battery unit.

[0071] like Fig.11As shown, the liquid inlet pipe 131 is located inside the battery case 1 and on the upper side of the liquid cooling plate. The liquid inlet pipe 131 extends in the height direction and is fluidly connected to the liquid cooling plate. The liquid inlet intermediate pipe 132 is located outside the battery case 1 and on the lower side of the liquid cooling plate. Then, when two adjacent battery cells are stacked and connected, the liquid inlet intermediate pipe 132 of the battery case 1 on the upper side can be directly plugged into the liquid inlet pipe 131 of the battery case 1 on the lower side. Therefore, the connection scheme is simple. Therefore, the liquid inlet intermediate pipe 132 will extend into the inner side of the battery case of another adjacent battery cell to be plugged into the liquid inlet pipe of another adjacent battery cell.

[0072] Specifically, Figure 4 As shown, the battery cell 100 also includes an upper cover 10 that is covered on the battery case 1, and the upper cover 10 is provided with through holes corresponding to the positions of the liquid inlet pipe and the liquid outlet pipe. In this way, the liquid inlet intermediate pipe 132 of the battery cell located in the upper layer can extend into the battery case 1 of the battery cell located in the lower layer through the through hole on the upper cover 10, thereby realizing connection with the liquid inlet pipe of the battery cell located in the lower layer. It can be seen that the battery cell of the embodiment of the present application is configured to extend along the vertical direction by setting the liquid inlet pipe and the liquid inlet intermediate pipe, and the liquid inlet intermediate pipe extends out of the lower side of the bottom plate of the battery case 1, that is, the end of the liquid inlet intermediate pipe is located on the lower side of the bottom plate of the battery case 1, thereby realizing plug-in with the liquid inlet pipe in another battery case 1, thereby eliminating redundant connection lines and simplifying the structure of the battery cell.

[0073] The battery unit of the embodiment of the present application is provided with a liquid inlet pipe 131 and a liquid inlet intermediate pipe 132, so that when multiple battery units are stacked, the positions of the liquid inlet intermediate pipe and the liquid inlet pipe 131 between two adjacent battery units correspond to each other and can be connected. This simplifies the connection structure of the liquid circuit, reduces the overall footprint of the battery, and is more suitable for engineering machinery.

[0074] The battery unit 100 further includes a liquid outlet pipe 133 disposed on the upper side of the liquid cooling plate and a liquid outlet intermediate pipe 134 disposed on the lower side of the liquid cooling plate. The liquid outlet pipe 133 and the liquid outlet intermediate pipe 134 are used to guide the heat exchange medium out of the liquid cooling plate, and the liquid outlet intermediate pipe 134 extends into the battery box of the adjacent battery unit to be connected with the liquid outlet pipe of the adjacent battery unit.

[0075] In some embodiments, the liquid inlet pipe 131 and the liquid inlet intermediate pipe 132 are both extended in the height direction and coaxially arranged, and the liquid circuit connector includes the liquid inlet connector 31. The liquid outlet pipe 133 and the liquid outlet intermediate pipe 134 are both extended in the height direction and coaxially arranged, and the liquid circuit connector includes the liquid outlet connector 32.

[0076] like Fig.11As shown, the liquid inlet connector 31 includes a first liquid inlet quick plug 311 and a second liquid inlet quick plug 312. The liquid inlet connector 31 is connected to the upper end of the liquid inlet pipe 131. Specifically, the second liquid inlet quick plug 312 of the liquid inlet connector 31 is connected to the liquid inlet pipe 131. When connecting two adjacent battery cells 100, the liquid inlet intermediate pipe 132 of the battery cell located at the upper layer extends into the battery box of the battery cell located at the lower layer and is connected to the first liquid inlet quick plug 311 of the liquid inlet pipe 131. The first liquid inlet quick plug 311 and the second liquid inlet quick plug 312 here refer to the plugs at both ends of the liquid inlet connector 31, and do not mean that the liquid inlet connector 31 is composed of two parts. .

[0077] The liquid circuit connector includes a liquid outlet connector 32. The liquid outlet connector 32 is connected to the upper end of the liquid outlet pipe 133. Similarly, the liquid outlet connector 32 includes a second liquid outlet quick plug 322 connected to the liquid outlet pipe 133 and a first liquid outlet quick plug 321 for connecting to the liquid outlet intermediate pipe 134 of another battery cell.

[0078] In some embodiments, the battery box 1 further includes a partition 12 disposed in the accommodating cavity. The partition 12 and some of the side plates 11 enclose an isolation cavity, and the liquid inlet pipe 131 and the liquid outlet pipe 133 are both disposed in the isolation cavity to be isolated from the battery module.

[0079] like Figure 5 As shown, located Figure 5 The leftmost partition plate 12 is arranged opposite to the first side plate 111 and encloses an isolation chamber. The liquid inlet pipe 131 and the liquid outlet pipe 133 are both arranged in the isolation chamber. In this way, the liquid inlet and liquid outlet of the liquid cooling plate are concentrated in the isolation chamber, thereby preventing the heat exchange medium of the liquid cooling plate from flowing to the battery module to affect the normal and safe operation of the battery module. Similarly, Figure 3 As shown, the electrical connector is also arranged in the isolation chamber, so that the connectors of the circuit and the water circuit are centrally arranged in the isolation chamber, which is convenient for maintenance. Figures 3 to 5 As shown, a manual maintenance switch assembly 5 is provided on the first side plate 111 .

[0080] In some embodiments, the battery includes at least two battery cells stacked in the height direction and an electrical connector 4. The electrical connector 4 electrically connects two adjacent battery cells, and the electrical connector 4 includes a connector socket 41 and a connector plug 42. The connector plug 42 is disposed on the bottom plate 13 of the battery case 1 and includes a pin located on the lower side of the bottom plate 13, and the pin extends into the battery case 1 of the adjacent battery cell to be directly inserted into the jack of the connector socket 41 located in the battery case 1 of the adjacent battery cell.

[0081] In some embodiments, the connector socket 41 includes a socket body and a positioning column disposed on the socket body, and the connector plug 42 includes a plug body and a positioning hole disposed on the plug body, and the positioning column and the positioning hole cooperate to provide guidance.

[0082] like Figure 1 As shown, the explosion-proof valve of the embodiment of the present application is arranged on the second side plate 112 of the battery case 1. Then when multiple battery cells are stacked in the height direction, the explosion-proof valves of the multiple battery cells are all arranged on the second side plate 112 of the corresponding battery case. In this way, when thermal runaway occurs, the high-temperature and high-pressure gas will be ejected in the horizontal direction when it is ejected through the explosion-proof valve, which is easy to cause damage to passers-by or other equipment. In order to solve this problem, the battery of the embodiment of the present application also includes a smoke exhaust plate arranged on the outside of the side of the multiple battery cells, the smoke exhaust plate covers the multiple explosion-proof valves of the multiple battery cells, and forms a smoke exhaust guide channel between the sides of the multiple battery cells, thereby changing the discharge direction of the high-temperature and high-pressure gas. For example, when the smoke exhaust plate is arranged to extend in the height direction, the high-temperature and high-pressure gas can flow in the height direction and then be discharged downward or upward to avoid damage to the surrounding people or equipment.

[0083] Another embodiment of the present application provides a construction machinery, comprising the above-mentioned battery, wherein the battery is used to provide electrical energy.

[0084] According to the following Figures 1 to 11 The structure of a battery in a specific embodiment of the present application is described in detail.

[0085] like Figures 1 to 4 As shown, the battery unit of this embodiment includes a battery box 1, a bracket assembly 2, a liquid circuit connector 3, an electrical connector 4, a manual maintenance switch assembly 5, a battery module 6, an explosion-proof valve 7, a sealing gasket 8, a pull plate 9, an upper cover 10, an upper heat-conducting layer 101, a lower heat-conducting layer 102 and a fastener 103.

[0086] like Figure 5 As shown, the battery box 1 includes a plurality of side panels 11, a partition 12, a bottom plate 13, a guide and positioning assembly 14, an upper sealing surface 15, a lower sealing surface 16, a bolt hole 17, a bolt connection through hole 18 and a sealing gasket mounting groove 19. The plurality of side panels include two first side panels 111 and two second side panels 112. The two first side panels 111 and the two second side panels 112 are enclosed in the circumferential direction to form a rectangular battery box 1. The first side panel 111 is provided with a manual maintenance switch mounting hole 1111. The two second side panels 112 are respectively provided with a smoke exhaust hole 1101 and a flue hole 1102.

[0087] like Figure 5As shown in the figure, the guiding and positioning assembly 14 includes a guiding and positioning pin 141 and a guiding and positioning hole 142. Among them, the guiding and positioning pin 141 is arranged on the top surface of the battery box body 1, and the guiding and positioning hole is arranged on the bottom surface of the battery box body 1. In this way, when multiple battery cells are stacked, the guiding and positioning pin 141 extends into the guiding and positioning hole 142 to achieve positioning.

[0088] As Figure 5 shown in the figure, the battery box body 1 is composed of two first side plates 111, two second side plates 112, a partition plate 12, and a bottom plate 13 after welding. Both the first side plate 111 and the second side plate 112 adopt an aluminum profile structure with a "mesh" - shaped cavity plus internal diagonal ribs. The cross - section designs are the same, and the same mold can be shared, reducing the manufacturing cost. The cavity structure is light in weight, can absorb external impact energy, and enhance the strength and safety of the box body. Among them, the connection positions of the first side plate 111, the two second side plates 112, and the bottom plate 13 are all welded and fixed. An internal seal is formed inside the battery box body 1 to improve the overall sealing effect. After the second side plate 112 is sealed, a flue can be formed inside the cavity to improve the thermal runaway safety. After the first side plate 111 and the second side plate 112 are welded, the welding positions on the upper and lower surfaces are polished flat to form an upper sealing surface 15 and a lower sealing surface 16. The two ends of the partition plate 12 are welded and fixed to the two second side plates 112, and the lower surface of the partition plate 12 is flush with the upper surface of the bottom plate 13.

[0089] As Fig.11 shown in the figure, the battery cell further includes a liquid inlet pipe 131, a liquid inlet intermediate pipe 132, a liquid outlet pipe 133, and a liquid outlet intermediate pipe 134.

[0090] As Figure 3 and Figure 4 shown in the figure, the bracket assembly 2 includes a water inlet pipe connector bracket 21, a water outlet pipe connector bracket 22, and a high - and - low - voltage connector bracket 23. The water inlet pipe connector bracket 21 is screwed and fixed to the first side plate 111 and the partition plate 12. The water outlet pipe connector bracket 22 is screwed and fixed to the first side plate 111 and the partition plate 12. The high - and - low - voltage connector bracket 23 is screwed and fixed to the first side plate 111 and the partition plate 12.

[0091] As Figures 7 to 11 shown in the figure, the liquid path connector 3 includes a liquid inlet connector 31 and a liquid outlet connector 32. The liquid inlet connector 31 is screwed and fixed to the water inlet pipe connector bracket 21, and the liquid outlet connector 32 is screwed and fixed.

[0092] As Fig.11 shown in the figure, the liquid inlet connector 31 includes a first liquid inlet quick - plug 311 and a second liquid inlet quick - plug 312. The liquid outlet connector 32 includes a first liquid outlet quick - plug 321 and a second liquid outlet quick - plug 322.

[0093] As Figure 7 and Figure 8As shown, the electrical connector 4 (high and low voltage connection assembly) includes a connector socket 41 and a connector plug 42. The connector socket 41 includes a socket body 411, a guide positioning device 412, a socket PE structure 413, a high voltage connection socket 414 and a low voltage connection socket 415. The connector plug 42 includes a plug body 421, a connector guide groove 422, a plug PE structure 423, a high voltage connection plug 424 and a low voltage connection plug 425. The connector socket 41 is bolted to the high and low voltage connector bracket 23. The connector plug 42 is bolted to the bottom plate 13.

[0094] The manual maintenance switch assembly 5 includes a manual maintenance switch socket and a manual maintenance switch plug. The manual maintenance switch socket is screwed and fixedly connected to the first side plate 111, and the manual maintenance switch plug is screwed and fixedly connected to the manual maintenance switch socket.

[0095] The battery module 6 adopts CTP grouping technology, which can effectively improve the internal volume utilization and energy density of the battery. The battery module 6 is bonded and fixed to the pull plate 9 through the upper heat conductive layer 101, and the battery module 6 is bonded and fixed to the bottom plate 13 through the lower heat conductive layer 102. The battery module 6 is bonded and fixed to the partition 12 through aerogel, providing heat insulation, buffering, insulation and other effects. The pull plate 9 and the partition 12 are riveted and fixed to enhance the structural strength of the battery module.

[0096] The explosion-proof valve 7 is screwed and fixedly connected to the second side plate 112. The sealing gasket 8 is installed in the sealing gasket installation groove 19 and is bonded and fixedly connected. The upper cover 10 is fitted with the upper sealing surface 15 and screwed and fixedly connected by the fastener 103. The sealing gasket 8 is compressed to achieve the sealing inside the battery.

[0097] like Fig.11 As shown, when the battery is grouped, multiple battery cells 100 are stacked and integrated, and the liquid inlet intermediate tube 132 of the upper battery cell is fast-plugged and fixedly connected to the liquid inlet tube 131 of the lower battery cell through the liquid inlet connector 31; similarly, the liquid outlet intermediate tube 134 of the upper battery cell is fast-plugged and fixedly connected to the liquid outlet tube 133 of the lower battery cell through the liquid outlet connector 32; the connector socket 41 of the lower battery cell is fast-plugged and fixedly connected to the connector plug 42 of the upper battery cell; the guide positioning device 412 of the lower battery cell is fast-plugged and fixedly connected to the connector guide groove 422 of the upper battery cell to achieve a guide connection. The low-voltage connection socket 415 of the lower battery cell is fast-plugged and fixedly connected to the low-voltage connection plug 425 of the upper battery cell to achieve a low-voltage connection. The high-voltage connection socket 414 of the lower battery cell is fast-plugged and fixedly connected to the high-voltage connection plug 424 of the upper battery cell. A high-voltage connection is achieved. The socket PE structure 413 of the lower battery is fastened to the plug PE structure 423 of the upper battery to achieve PE connection.

[0098] The battery of this embodiment adopts in-pack quick-plug high and low voltage and water circuit connectors, which saves external wiring harness and pipeline installation space, has high integration, improves assembly and maintenance efficiency, and improves space utilization and energy density.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application rather than to limit it. Although the present application has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present application can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present application, which should be included in the scope of the technical solution for protection in the present application.

Claims

1. A battery, characterized in that: A battery cell (100) is provided, wherein the battery cell (100) comprises: A battery box (1) comprises a bottom plate (13) and a plurality of side plates (11) extending in a circumferential direction of the bottom plate (13), wherein the bottom plate (13) and the plurality of side plates (11) enclose a receiving cavity (A); A battery module (6) is arranged in the accommodating cavity (A) and comprises a battery cell; At least one of the plurality of side panels (11) comprises a smoke exhaust cavity, the smoke exhaust cavity comprising an inner cavity, a smoke duct hole (1102) arranged on a cavity wall of the smoke exhaust cavity close to a side of the accommodating cavity, and a smoke exhaust hole (1101) arranged on a cavity wall of the smoke exhaust cavity away from a side of the accommodating cavity; and An explosion-proof valve (7) is installed at the smoke exhaust hole (1101), and the inner cavity of the smoke exhaust cavity forms a flue. When thermal runaway occurs in the battery module (6), a high-temperature and high-pressure medium enters the flue through the flue hole (1102) and acts on the explosion-proof valve (7).

2. The battery according to claim 1, characterized in that The battery box (1) is a rectangular parallelepiped structure, the plurality of side panels (11) include two first side panels (111) spaced apart in a length direction (X) and two second side panels (112) spaced apart in a width direction (Y), and at least one of the two second side panels (112) includes the smoke exhaust cavity.

3. The battery according to claim 2, characterized in that The flue extends along the length direction (X), and the smoke exhaust cavity comprises a plurality of flue holes (1102) and a plurality of smoke exhaust holes (1101) arranged at intervals in the length direction (X); in the length direction (X), the plurality of flue holes (1102) and the plurality of smoke exhaust holes (1101) are staggered.

4. The battery according to claim 3, characterized in that The flue holes (1102) are respectively arranged on both sides of each of the smoke exhaust holes (1101) so that the high-temperature and high-pressure medium flowing into the flue from the flue holes (1102) on both sides acts on the explosion-proof valve (7) at the same smoke exhaust hole (1101).

5. The battery according to claim 2, characterized in that The end surfaces at both ends of the second side plate (112) are respectively abutted against the two first side plates (111) so that the two ends of the second side plate (112) are closed.

6. The battery according to claim 1, characterized in that The battery box (1) further comprises a plurality of partitions (12) arranged in the accommodating cavity, wherein the plurality of partitions (12) divide the accommodating cavity into at least two accommodating sub-cavities, and the battery unit (100) comprises at least two battery modules (6), wherein the at least two battery modules (6) are correspondingly arranged in the at least two accommodating sub-cavities, and the partitions (12) are respectively arranged at both ends of each battery module (6).

7. The battery according to any one of claims 1 to 6, characterized in that The bottom plate (13) comprises a liquid cooling plate having a flow channel for circulating a heat exchange medium. The battery comprises at least two battery cells (100) stacked in a height direction, and two adjacent battery cells (100) are connected to each other via a liquid path connector (3).

8. The battery according to claim 7, characterized in that Each of the battery cells (100) comprises a liquid inlet pipe (131) arranged on the upper side of the liquid cooling plate and a liquid inlet intermediate pipe (132) arranged on the lower side of the liquid cooling plate, the liquid inlet pipe (131) and the liquid inlet intermediate pipe (132) being used to introduce a heat exchange medium into the liquid cooling plate, and the liquid inlet intermediate pipe (132) extending into a battery box (1) of an adjacent battery cell to be connected to the liquid inlet pipe of the adjacent battery cell; and / or, the battery cell (100) further comprises a liquid outlet pipe (133) arranged on the upper side of the liquid cooling plate and a liquid outlet intermediate pipe (134) arranged on the lower side of the liquid cooling plate, the liquid outlet pipe (133) and the liquid outlet intermediate pipe (134) being used to extract the heat exchange medium from the liquid cooling plate, and the liquid outlet intermediate pipe (134) extending into a battery box of an adjacent battery cell to be connected to the liquid outlet pipe of the adjacent battery cell.

9. The battery according to claim 8, characterized in that The liquid inlet pipe (131) and the liquid inlet intermediate pipe (132) both extend along the height direction and are coaxially arranged, and the liquid circuit connector comprises a liquid inlet connector (31), and the liquid inlet connector (31) is connected to the upper end of the liquid inlet pipe (131) to connect with the liquid inlet intermediate pipe of the adjacent battery unit located on the upper side; and / or, the liquid outlet pipe (133) and the liquid outlet intermediate pipe (134) both extend along the height direction and are coaxially arranged, and the liquid circuit connector comprises a liquid outlet connector (32), and the liquid outlet connector (32) is connected to the upper end of the liquid outlet pipe (133) to connect with the liquid outlet intermediate pipe (134) of the adjacent battery unit located on the upper side.

10. The battery according to claim 8, characterized in that The battery box (1) further comprises a partition (12) arranged in the accommodating cavity, wherein the partition (12) and part of the side plates of the plurality of side plates (11) enclose an isolation cavity, and the liquid inlet pipe (131) and the liquid outlet pipe (133) are both arranged in the isolation cavity to be isolated from the battery module.

11. The battery according to any one of claims 1 to 6, characterized in that The battery comprises at least two battery cells stacked in a height direction and an electrical connector (4), wherein the electrical connector (4) electrically connects two adjacent battery cells, and the electrical connector (4) comprises a connector socket (41) and a connector plug (42), wherein the connector plug (42) is arranged on a bottom plate (13) of a battery case (1) and comprises a plug pin located on the lower side of the bottom plate (13), wherein the plug pin extends into a battery case (1) of an adjacent battery cell to be directly inserted into a plug hole of the connector socket (41) located in the battery case (1) of the adjacent battery cell.

12. The battery according to claim 11, characterized in that The connector socket (41) comprises a socket body and a guide positioning device arranged on the socket body, and the connector plug (42) comprises a plug body and a guide groove arranged on the plug body, and the guide positioning device and the guide groove cooperate to achieve positioning.

13. A construction machine comprising the battery according to any one of claims 1 to 12, wherein the battery is used to provide electrical energy.

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