Battery pack and energy storage device

Abstract

The utility model discloses a kind of battery pack and energy storage equipment, belong to battery technical field.Wherein, battery pack includes support and at least one battery module, each battery module includes explosion venting passage and multiple electric core, multiple electric core is arranged in support along first direction, each electric core is provided with pole along the side of second direction, the other side is provided with explosion-proof valve, first direction and second direction are arranged at angle, explosion venting passage is located in multiple electric core side away from pole and extends along first direction, explosion venting passage is communicated with the outlet of the explosion-proof valve of all electric core in same battery module.The utility model makes and pole connection electric connection component can be spaced apart with explosion-proof valve, avoids the contact of release material and electric connection component, not only reduce the risk of electronic component damage, also prevent the occurrence of electrical short circuit, reduce the possibility of fire, improve the safety and reliability of battery pack.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery pack and energy storage device. Background Technology

[0002] In related technologies, traditional battery modules, in pursuit of a compact layout, often place the cell terminals and explosion-proof valves in close proximity. However, electrical connection components such as the data acquisition circuit and aluminum foil must be connected to the terminals, resulting in these components being adjacent to the explosion-proof valve. When a cell experiences thermal runaway, the electrolyte and flammable gases ejected from its explosion-proof valve can directly spray onto these electrical connection components, causing damage to electrical components and potentially triggering electrical short circuits. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a battery pack that can prevent leakage from contacting electrical connection components and achieve directional drainage of leakage.

[0004] This utility model also proposes an energy storage device comprising the above-mentioned battery pack.

[0005] A battery pack according to a first aspect of the present invention includes: a bracket and at least one battery module. Each battery module includes an explosion venting channel and a plurality of battery cells. The plurality of battery cells are arranged in the bracket along a first direction. Each battery cell has an electrode post on one side along a second direction and an explosion-proof valve on the other side. The first direction and the second direction are arranged at an angle. The explosion venting channel is located on the side of the plurality of battery cells facing away from the electrode post and extends along the first direction. The explosion venting channel is connected to the outlet of the explosion-proof valve of all the battery cells in the same battery module. The battery pack according to the embodiments of the present invention has at least the following beneficial effects: This utility model embodiment of the battery pack, by placing the terminals and explosion-proof valves on opposite sides of the battery cells, separates the electrical connection components connected to the terminals from the explosion-proof valves, thus physically isolating the electrical connection components and explosion-proof valves through the battery cells. Furthermore, by setting an explosion-proof channel whose extension direction is consistent with the arrangement direction of multiple battery cells, and connecting it to the outlet of the explosion-proof valves of all battery cells in the same battery module, it ensures that when a battery cell experiences thermal runaway, the vented material ejected through the explosion-proof valves of each cell can be collected by the explosion-proof channel. This further prevents contact between the vented material and the electrical connection components, and also achieves directional drainage of the vented material. This not only reduces the risk of damage to electronic components but also prevents electrical short circuits and reduces the possibility of fire, thereby improving the safety and reliability of the battery pack.

[0006] According to some embodiments of the present invention, each battery module further includes a flow guide, the interior of which defines the explosion relief channel, and the sidewall of the flow guide is provided with a plurality of connection holes respectively communicating with the explosion relief channel. The plurality of connection holes are correspondingly and sealed to the outlet of the explosion-proof valve of the plurality of battery cells. According to some embodiments of the present invention, the guide member is provided with an outlet communicating with the explosion relief channel on at least one side along the first direction, and the outlet is used to discharge the vented material of the battery cell.

[0007] According to some embodiments of the present invention, the battery pack further includes a side pressure plate disposed on the side of the current guide facing away from the battery cell. The side pressure plate is connected to the bracket and is configured to apply pressure toward the battery cell to the current guide.

[0008] According to some embodiments of the present invention, the battery pack includes two battery modules, and the bracket has two receiving cavities spaced apart along a third direction, wherein the third direction, the first direction, and the second direction are perpendicular to each other, and the two battery modules are correspondingly disposed in the two receiving cavities.

[0009] According to some embodiments of the present invention, the battery pack further includes a cooling plate disposed between the two receiving cavities, and the cooling plate is configured to cool all the cells of the two battery modules.

[0010] According to some embodiments of the present invention, the bracket includes a first plate group and a second plate group. Each battery module has a first plate group on its side facing away from the other battery module. The first plate group includes at least one limiting plate for supporting the battery module. The second plate group is disposed between the two first plate groups and is spaced apart from the two first plate groups respectively. The second plate group includes two partitions spaced apart along the second direction. The receiving cavity is defined between each first plate group and the two partitions. The limiting plate and the partitions are configured to apply pressure to the battery module along the third direction respectively.

[0011] According to some embodiments of the present invention, the limiting plate extends along the first direction, the bracket further includes an end plate and a side pressure plate, the battery module is provided with the end plate at both ends along the first direction, the end plate is connected to the limiting plate and the partition at both ends along the third direction, and the end plates on both sides are configured to apply pressure to the battery module along the first direction; the battery module is provided with the side pressure plate on both sides along the third direction, the side pressure plate is connected to the limiting plate of the two first plate groups at both ends along the third direction, the partition is connected to the side pressure plate, and the side pressure plates on both sides are configured to apply pressure to the battery module along the second direction.

[0012] According to some embodiments of the present invention, each battery module further includes an integrated busbar, which is connected to the terminal of each battery cell. The battery pack also includes a connector, and the integrated busbars of two battery modules are electrically connected through the connector.

[0013] The energy storage device according to a second aspect embodiment of the present invention includes a plurality of battery packs as described in the first aspect embodiment.

[0014] The energy storage device according to the embodiments of this utility model has at least the following beneficial effects: The energy storage device of this utility model embodiment adopts the battery pack of the first aspect embodiment. By optimizing the structural design of the battery pack, it not only ensures that when the battery cell experiences thermal runaway, the leakage material ejected by each battery cell through the explosion-proof valve can be collected by the explosion-proof channel, thereby further avoiding contact between the leakage material and the electrical connection components, but also realizes the directional diversion of the leakage material, reducing the risk of fire caused by the leakage material to the energy storage device, thereby improving the safety and reliability of the energy storage device.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the battery pack structure according to an embodiment of the present invention (first view). Figure 2 This is a schematic diagram of the battery pack structure according to an embodiment of the present invention (second view). Figure 3 This is a cross-sectional schematic diagram of a battery pack according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the lower module of the battery pack according to an embodiment of the present invention; Figure 5 This is an exploded view of the lower module of a battery pack according to an embodiment of the present invention. Figure 6 This is a schematic diagram of the upper module of a battery pack according to an embodiment of the present invention; Figure 7 This is an exploded view of the upper module of the battery pack according to an embodiment of the present invention. Figure 8 This is a cross-sectional schematic diagram of two battery packs stacked according to an embodiment of the present invention.

[0017] Icon labels: Battery pack 1000; Support 100; Side pressure plate 110; Receiving cavity 120; First plate assembly 130; Limiting plate 131; Second plate assembly 140; Partition 141; End plate 150; Battery module 200; current guide 210; explosion relief channel 211; connection hole 212; outlet 213; battery cell 220; terminal post 221; explosion-proof valve 222; integrated busbar 230; Cooling plate 300; Connector 400; Electrical panel 500; adhesive layer 600. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.

[0021] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0022] In existing compact battery modules, the battery cell typically places its terminals and explosion-proof valve on the same side of the surface or in close proximity. Because the terminals need to connect to electrical connection components such as the aluminum bus and the data acquisition circuit, the electrical connection components are located relatively close to the explosion-proof valve. Thermal runaway in the battery cell will trigger the explosion-proof valve to open, releasing high-temperature, high-pressure electrolyte and flammable gases.

[0023] Because the electrical connection components are located close to the explosion-proof valve, these high-temperature and conductive sprays will directly hit the electrical connection components, which will not only corrode electronic components, but also cause electrical short circuits, thereby damaging electrical components and causing fires.

[0024] To address the aforementioned problems, some embodiments of this utility model propose a battery pack 1000 suitable for energy storage devices. This pack prevents leakage from contacting electrical connection components and enables directional drainage of leakage. See details below. Figures 1 to 8 The following describes the battery pack 1000.

[0025] Reference Figure 1 and Figure 2 As shown in this embodiment of the invention, the battery pack 1000 includes a bracket 100 and at least one battery module 200. The bracket 100 is a support structure for supporting the battery module 200, and can be made of a metal frame or composite material. In this embodiment, the bracket 100 is generally rectangular, and at least one battery module 200 is installed inside the bracket 100. The bracket 100 is used to constrain the position of the battery module 200.

[0026] It should be noted that, in this embodiment of the invention, when two or more battery modules 200 are placed in the bracket 100, these battery modules 200 can be placed in layers. Specifically, the internal structure of the bracket 100 is divided into a number of compartments corresponding to the number of battery modules 200, and the compartments are stacked, so that each battery module 200 can be independently placed in its corresponding compartment.

[0027] The following explanation uses a battery module 200 installed inside the bracket 100 as an example. Figure 3 and Figure 4As shown in this embodiment of the invention, the battery module 200 includes a venting channel 211 and multiple battery cells 220. The multiple battery cells 220 are arranged along a first direction and fixed to the bracket 100. A heat-insulating material is disposed between two adjacent battery cells 220 to block heat transfer during thermal runaway. Structural adhesive is applied between the outer wall of each battery cell 220 and the inner wall of the bracket 100 to achieve integrated bonding and fixation between the battery cell 220 and the bracket 100.

[0028] Reference Figure 3 As shown in this embodiment of the invention, each battery cell 220 has a terminal post 221 on one side along the second direction and an explosion-proof valve 222 on the other side, with the first direction and the second direction forming an angle. Here, "the first direction and the second direction forming an angle" means that the two directions are neither parallel nor perpendicular. In one example, the first direction is the length direction of the support 100; in other words, multiple battery cells 220 of each battery module 200 are arranged along the length direction of the support 100, and the second direction is the width direction of the support 100. When there are two or more battery modules 200, the two or more battery modules 200 are stacked along a third direction; in this embodiment, the third direction is the thickness direction of the support 100.

[0029] For ease of description, Figure 3 The following explanation uses the left-right direction as an example. In this embodiment of the invention, the explosion-proof valve 222 is located on the right side of the battery cell 220, while the pole post 221 is located on the left side of the battery cell 220. Therefore, in order to allow the electrical connection assembly to be located near the pole post 221, the electrical connection assembly is also located on the left side of the battery cell 220, thus separating the electrical connection assembly from the explosion-proof valve 222. This achieves spatial isolation between the electrical connection assembly and the explosion-proof valve 222, preventing the explosion-proof valve 222 from being located close to the electrical connection assembly.

[0030] In other words, this embodiment of the invention forms an electrical connection area and an explosion-proof area on opposite sides of the battery cell 220, with all the terminals 221 of the battery cell 220 facing towards the electrical connection area, thus creating the electrical connection area and providing the prerequisite for the centralized arrangement of all electrical connection components such as the acquisition circuit and aluminum bar. Simultaneously, the explosion-proof valves 222 of all the battery cells 220 are positioned towards the explosion-proof area on the other side of the battery cell 220, achieving complete separation of the electrical and thermal areas and reducing the risk of electrolyte and flammable gases being sprayed into the electrical connection area.

[0031] Combination Figure 3 and Figure 5It is understood that in this embodiment of the invention, the explosion venting channel 211 is a closed flow channel for guiding the discharge of the battery cell 220, and it can be implemented using a tubular structure or a cavity structure. In this embodiment, the explosion venting channel 211 and the explosion-proof valve 222 are located on the same side, both on the side of the multiple battery cells 220 facing away from the terminal post 221. The explosion venting channel 211 extends along a first direction, that is, the arrangement direction of the multiple battery cells 220, thereby covering the explosion-proof valves 222 of all battery cells 220 in the same battery module 200, and thus communicating with the outlet of the explosion-proof valves 222 of all battery cells 220 in the same battery module 200.

[0032] Specifically, when thermal runaway occurs in cell 220, the released material is discharged along the first direction through the explosion venting channel 211, thereby preventing the released material from spreading along the second direction to the electrical connection area where the terminal post 221 is located. The directional flow guidance function of the explosion venting channel 211 reduces the risk of flammable gas accumulation, while maintaining the compactness of the overall structure of the battery pack 1000 and meeting the safety requirements of the battery pack 1000.

[0033] The battery pack 1000 of this utility model embodiment sets the terminal posts 221 and the explosion-proof valves 222 on opposite sides of the battery cells 220, thereby separating the electrical connection components connected to the terminal posts 221 from the explosion-proof valves 222. The battery cells 220 physically isolate the electrical connection components and the explosion-proof valves 222. Furthermore, by setting an explosion-proof channel 211 whose extension direction is consistent with the arrangement direction of the multiple battery cells 220 and which can be connected to the explosion-proof valves 222 of all battery cells 220, it is ensured that when a battery cell 220 experiences thermal runaway, the vented material ejected from each battery cell 220 through the explosion-proof valves 222 can be collected by the explosion-proof channel 211. This further avoids contact between the vented material and the electrical connection components and also achieves directional drainage of the vented material. This not only reduces the risk of damage to electronic components but also prevents electrical short circuits and reduces the possibility of fire, thereby improving the safety and reliability of the battery pack 1000.

[0034] Reference Figure 3 and Figure 4 As shown in this embodiment of the invention, each battery module 200 further includes a flow guide 210, which is a structural component used to guide the discharge of the battery cells 220. Specifically, it can be implemented using an integrally formed metal tube or an injection-molded high-temperature resistant plastic tube. In this embodiment, the flow guide 210 is generally elongated, and its extension direction is consistent with the first direction. Based on this, the interior of the flow guide 210 can define a discharge channel 211 extending along the arrangement direction of the multiple battery cells 220.

[0035] Reference Figure 3As shown in this embodiment of the invention, the sidewall of the flow guide 210 is provided with a plurality of connection holes 212 that communicate with the explosion relief channel 211. The connection holes 212 are through holes located on the sidewall of the flow guide 210, which can be formed by laser cutting or mold forming processes. The position of each connection hole 212 is aligned with the explosion-proof valve 222 of the corresponding battery cell 220. In this embodiment, the plurality of connection holes 212 are sealed to the outlets of the explosion-proof valves 222 of the plurality of battery cells 220. Specifically, the sealing connection between the outlet of the explosion-proof valve 222 and the connection hole 212 can be achieved by using a sealing ring or hot melt adhesive, thereby preventing the vented material from leaking to the outside of the flow guide 210 and further avoiding the possibility of the vented material being sprayed onto the electrical connection assembly.

[0036] Reference Figure 4 As shown, in this embodiment of the present invention, the guide member 210 is implemented using a hollow tubular structure, wherein the guide member 210 has an outlet 213 communicating with the explosion relief channel 211 on at least one side along the first direction. Figure 4 Taking the front and rear directions as an example for explanation, specifically, in one example, the front or rear end of the guide member 210 is provided with an outlet 213; in another example, the front and rear ends of the guide member 210 are respectively provided with outlets 213.

[0037] It is understood that in this embodiment of the invention, the outlet 213 is an opening structure located at the end of the guide member 210, which can be implemented using a circular, rectangular, or irregularly shaped hole. In this embodiment, the outlet 213 is used to discharge the vented material from the battery cell 220. When the battery cell 220 experiences thermal runaway, the vented material is ejected from the explosion-proof valve 222, passes through the connection hole 212 and the explosion-proof channel 211 in sequence, and is discharged from the outlet 213. In one example, when the battery pack 1000 is installed in an energy storage device such as an energy storage cabinet, the vented material discharged from the outlet 213 can be centrally discharged out of the energy storage cabinet through a pre-set flow channel.

[0038] It should be noted that, in this embodiment of the invention, the arrangement direction of the outlet 213 is limited to a first direction along the arrangement direction of the plurality of cells 220, so that the discharged material can be directionally discharged along the length direction of the battery module 200, avoiding diffusion to the electrical connection area along the second direction. The structural design of the guide member 210 makes the discharged material form a unidirectional flow path in the channel, further reducing the possibility of the discharged material flowing back.

[0039] Reference Figure 3 and Figure 5As shown in this embodiment of the invention, the battery pack 1000 further includes a side pressure plate 110. The side pressure plate 110 can be a metal or composite material plate, specifically formed by stamping aluminum alloy sheet. In this embodiment, the side pressure plate 110 is located on the side of the current guide 210 facing away from the battery cell 220; in other words, the side pressure plate 110 is located on the outside of the current guide 210. The side pressure plate 110 is connected to the bracket 100 and is configured to press the current guide 210 against the battery cell 220.

[0040] Specifically, the side pressure plate 110 is installed on the side surface of the guide member 210 facing away from the battery cell 220, and it can be rigidly connected to the side of the bracket 100 by bolts or welding. When the side pressure plate 110 is tightened, the pressure generated is transmitted to the battery cell 220 through the guide member 210, forming a sealing interface between the connection hole 212 of the guide member 210 and the explosion-proof valve 222. In one example, multiple side pressure plates 110 are provided, and the multiple side pressure plates 110 are arranged at intervals along the first direction, so that the pressure distribution can cover the extension area of ​​the guide member 210 along the first direction, ensuring that the connection between the explosion-proof valve 222 and the explosion relief channel 211 of each battery cell 220 is in a compressed state. In the event of thermal runaway of the battery cell 220, the sealing interface between the guide member 210 and the battery cell 220 can effectively prevent the high-temperature vented material from spreading to the electrical connection area.

[0041] Reference Figure 1 and Figure 3 As shown in this embodiment of the utility model, the battery pack 1000 includes two battery modules 200, and the bracket 100 is configured to define two receiving cavities 120. The receiving cavity 120 is an independent installation space enclosed by the bracket 100 structure. In this embodiment, the two receiving cavities 120 are spaced apart along a third direction, and the third direction, the first direction, and the second direction are perpendicular to each other. The two battery modules 200 are correspondingly disposed in the two receiving cavities 120.

[0042] Specifically, each receiving cavity 120 houses a battery module 200. When a battery module 200 experiences thermal runaway, the vented material from its internal cells 220 is discharged along the corresponding venting channel 211. Third-party three-dimensional isolation prevents the vented material from directly entering adjacent receiving cavities 120. In one example, the upper battery module 200 is the upper-layer module, and the lower battery module 200 is the lower-layer module.

[0043] Combination Figure 4 and Figure 6It is understood that in this embodiment, the terminal post 221 of the upper module and the terminal post 221 of the lower module are located on the same side, and the explosion-proof valve 222 of the upper module and the explosion-proof valve 222 of the lower module are also located on the same side, so that the terminal post 221 area and the explosion-proof valve 222 area are spatially staggered to avoid the leakage material directly impacting the electrical connection components of the other battery module 200.

[0044] Reference Figure 4 As shown, in this embodiment of the present invention, the battery pack 1000 further includes a cooling plate 300. Specifically, the cooling plate 300 is a heat dissipation structure with heat exchange function, and can be implemented using a metal plate with internal cooling channels, which dissipates heat through a circulating cooling medium. Combined with... Figure 3 It is understood that in this embodiment, the cooling plate 300 is disposed between the two receiving cavities 120, and it can be fixed to the upper module or the lower module.

[0045] Continue to refer to Figure 3 As shown in this embodiment of the invention, the cooling plate 300 extends along a first direction, and all the cells 220 of the two battery modules 200 can directly or indirectly contact the surface of the cooling plate 300. In one example, a thermally conductive structural adhesive is applied between the top of the cell 220 of the lower module and the surface of the cooling plate 300. Similarly, a thermally conductive structural adhesive is applied between the bottom of the cell 220 of the upper module and the surface of the cooling plate 300. The thermally conductive structural adhesive can conduct the heat generated by the cell 220 to the cooling plate 300, thereby enabling the cooling plate 300 to cool all the cells 220 of the two battery modules 200.

[0046] Reference Figure 1 As shown, in this embodiment of the present invention, the bracket 100 includes a first plate group 130 and a second plate group 140, wherein, combined with Figure 5 and Figure 7 It can be understood that each battery module 200 has a first board group 130 on the side facing away from the other battery module 200. Specifically, with Figure 5 and Figure 7 Based on the vertical direction, the first plate group 130 is the outermost support structure of the battery module 200, which is used to provide a supporting base for the battery module 200 and restrict its displacement in the vertical direction. In this embodiment of the invention, the first plate group 130 includes at least one limiting plate 131 for supporting the battery module 200. In one example, each first plate group 130 includes one limiting plate 131, which extends along a first direction. Accordingly, a limiting plate 131 is provided on the lower side of the battery module 200 in the lower module, and a limiting plate 131 is also provided on the upper side of the battery module 200 in the upper module. Each limiting plate 131 can cover the entire battery module 200 along a second direction, and two battery modules 200 are stacked in the space between the two limiting plates 131.

[0047] Reference Figure 5 and Figure 7 As shown, in another example, each first plate group 130 includes two limiting plates 131, each of which extends along a first direction, and the two limiting plates 131 of the same first plate group 130 are spaced apart along a second direction. Based on this, the lower side of the battery module 200 in the lower module is provided with two limiting plates 131, and the upper side of the battery module 200 in the upper module is also provided with two limiting plates 131. Each limiting plate 131 only covers a part of the battery module 200 along the second direction, thereby saving material costs. The two battery modules 200 are stacked in the space between the two lower limiting plates 131 and the two upper limiting plates 131.

[0048] Combination Figure 3 It is understood that in this embodiment of the present invention, the second plate group 140 is disposed between the two first plate groups 130 and is spaced apart from the two first plate groups 130 along a third direction. Specifically, the second plate group 140 includes two partitions 141 spaced apart along a second direction. The partitions 141, as separating components, can separate the space between the two first plate groups 130 to define a receiving cavity 120 with each first plate group 130.

[0049] Continue to refer to Figure 3 As shown, in this embodiment of the invention, the partition 141 cooperates with the two limiting plates 131 of the upper first plate group 130 to clamp the battery module 200 of the upper module. Similarly, the partition 141 cooperates with the two limiting plates 131 of the lower first plate group 130 to clamp the battery module 200 of the lower module, thereby limiting the displacement of the battery module 200 in a third direction under vibration or impact. Specifically, the partition 141 applies an upward pressure to the battery module 200 of the upper module, and the two limiting plates 131 of the upper first plate group 130 apply a downward pressure to the battery module 200 of the upper module, thereby clamping the battery module 200. Similarly, the partition 141 applies a downward pressure to the battery module 200 of the lower module, and the two limiting plates 131 of the lower first plate group 130 apply an upward pressure to the battery module 200 of the lower module, thereby clamping the battery module 200.

[0050] It is understandable that the two partitions 141 are spaced apart so that a space suitable for accommodating the cooling plate 300 is formed between the two partitions 141. The cooling plate 300 is located between the two partitions 141, which provides the condition for the cooling plate 300 to contact the upper and lower battery modules 200 at the same time.

[0051] Reference Figure 8 As shown, in this embodiment of the invention, two or more battery packs 1000 can be stacked along a third direction to form a compact double-layer structure. A gap is formed between the lower module of the upper battery pack 1000 and the upper module of the lower battery pack 1000, due to the stacking of their first plate groups 130. Based on this, in one example, a cooling plate 300 can be additionally added within this gap to improve the heat dissipation efficiency of the battery modules 200 of the lower module of the upper battery pack 1000 and the upper module of the lower battery pack 1000.

[0052] It should be noted that, in a preferred embodiment, no additional cooling plate 300 is required for this gap. It is understood that all battery modules 200 within each battery pack 1000 are designed to dissipate heat on one side. To avoid the lower module of the upper battery pack 1000 and the upper module of the lower battery pack 1000 becoming heat-dissipating on both sides, while the other two modules are heat-dissipating on one side, this embodiment does not include a cooling plate 300 in this gap. This avoids uneven heat dissipation and ensures that all battery modules 200 maintain a single-sided heat dissipation mode, thereby guaranteeing the consistency of the operating environment for all cells 220.

[0053] Reference Figure 5 and Figure 7 As shown, in this embodiment of the present invention, the limiting plate 131 is used to apply a clamping force along a third direction to the battery module 200, and it extends along the first direction to cover all the battery cells 220. The bracket 100 also includes an end plate 150 and a side pressure plate 110, wherein the battery module 200 is provided with end plates 150 at both ends along the first direction, and the two ends of the end plates 150 along the third direction are respectively connected to the limiting plate 131 and the partition plate 141, thereby forming a rectangular rigid frame for limiting the battery module 200.

[0054] It should be noted that, referring to Figure 5As shown, in this embodiment of the invention, an adhesive layer 600 is provided between the end plate 150 and the battery module 200. This adhesive layer 600 can be a thermally conductive structural adhesive, which serves both to transfer heat and to fix the end plate 150 and the battery module 200. In this embodiment, the cooling plate 300 is fixedly connected to the two end plates 150. The end plates 150 on both sides clamp the battery module 200 along a first direction by applying a pressing force towards each other, thereby limiting the battery module 200 along the first direction.

[0055] Reference Figure 3 As shown in this embodiment of the invention, the battery module 200 is provided with side pressure plates 110 on both sides along a third direction. In this embodiment, the side pressure plates 110 are X-shaped, with their two ends along the third direction connected to the limiting plates 131 of the two first plate groups 130, and their middle part connected to the partition plate 141. The side pressure plates 110 on both sides clamp the battery module 200 along the second direction by applying a pressing force to each other, thereby limiting the battery module 200 along the second direction. It can be understood that since the upper and lower ends of the side pressure plates 110 are connected to the two first plate groups 130, the distance between the two first plate groups 130 is limited, ensuring that the two first plate groups 130 can clamp the battery module 200.

[0056] Specifically, when the battery module 200 is subjected to external impact or internal expansion force, the end plate 150 and the side plate work together to restrict the displacement of the module in the first and second directions, and the separator 141 and the limiting plate 131 jointly resist the deformation in the third direction, thereby achieving stable fixation in three-dimensional space and forming a multi-directional constraint frame that can resist displacement and deformation in the first, second and third directions at the same time, thereby avoiding misalignment of the explosion relief channel 211 or displacement of the cell 220 caused by local structural failure. Reference Figure 5 and Figure 7 As shown in this embodiment of the invention, each battery module 200 further includes an integrated busbar 230, which is connected to the terminal post 221 of each battery cell 220. Specifically, the integrated busbar 230 refers to a conductive structure that centrally connects the terminal posts 221 of multiple battery cells 220. It can be implemented by welding copper or aluminum busbars, and its function is to reduce the space occupied by the electrical connection area by unifying the connection interface.

[0057] Combination Figure 2It is understood that, in this embodiment of the invention, the battery pack 1000 also includes a connector 400, through which the integrated busbars 230 of the two battery modules 200 are connected in series. In this embodiment, the connector 400 is configured to bridge the integrated busbars 230 of the two modules, and the connector 400 sequentially connects the positive and negative terminals of the two battery modules 200 to form a conductive circuit. Based on this, the two electrical connection components, the integrated busbar 230 and the connector 400, are confined to an electrical connection area far from the explosion relief channel 211, forming spatial isolation from the area where the explosion-proof valve 222 is located. Reference Figure 4 As shown, in this embodiment of the present invention, each battery module 200 further includes an electrical panel 500. The electrical panel 500 is fixed to the side of the end plate 150 facing away from the battery module 200 and is electrically connected to the integrated busbar 230 for collecting the main positive, main negative, and other electrical interfaces of the battery module 200. It can be understood that in this embodiment, the electrical panel 500 is located on one side of the battery module 200 along the first direction, on a different plane from the explosion-proof valve 222, thus being spaced apart from the explosion-proof valve 222.

[0058] This utility model also proposes an energy storage device, including multiple battery packs 1000 described in the above embodiments. Specifically, the energy storage device can be an energy storage cabinet, an energy storage container, or other similar equipment; this embodiment does not limit the scope of the invention.

[0059] The energy storage device of this utility model embodiment adopts the battery pack 1000 of the above embodiment. By optimizing the structural design of the battery pack 1000, it is not only ensured that when the cell 220 experiences thermal runaway, the discharge material ejected by each cell 220 through the explosion-proof valve 222 can be collected by the explosion-proof channel 211, thereby further avoiding contact between the discharge material and the electrical connection components, but also realizing the directional diversion of the discharge material, reducing the risk of fire caused by the discharge material to the energy storage device, and thus improving the safety and reliability of the energy storage device.

[0060] Since the energy storage device adopts all the technical solutions of the battery pack 1000 in the above embodiments, it has at least all the beneficial effects brought about by the technical solutions in the above embodiments, which will not be repeated here.

[0061] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A battery pack, characterized in that, include: support; At least one battery module, each battery module including an explosion venting channel and multiple battery cells, the multiple battery cells being arranged in the bracket along a first direction, each battery cell having an electrode post on one side along a second direction and an explosion-proof valve on the other side, the first direction and the second direction being arranged at an angle, the explosion venting channel being located on the side of the multiple battery cells facing away from the electrode post and extending along the first direction, the explosion venting channel being connected to the outlet of the explosion-proof valve of all the battery cells in the same battery module.

2. The battery pack according to claim 1, characterized in that, Each of the battery modules further includes a flow guide, the interior of which defines the explosion relief channel. The sidewall of the flow guide is provided with a plurality of connection holes that communicate with the explosion relief channel. The plurality of connection holes are correspondingly and sealed to the outlets of the explosion-proof valves of the plurality of battery cells.

3. The battery pack according to claim 2, characterized in that, The guide member has an outlet communicating with the explosion relief channel on at least one side along the first direction, and the outlet is used to discharge the vented material from the battery cell.

4. The battery pack according to claim 2, characterized in that, The battery pack also includes a side pressure plate disposed on the side of the current guide facing away from the battery cell. The side pressure plate is connected to the bracket and configured to apply pressure toward the battery cell to the current guide.

5. The battery pack according to claim 1, characterized in that, The battery pack includes two battery modules, and the bracket has two receiving cavities spaced apart along a third direction. The third direction, the first direction, and the second direction are perpendicular to each other, and the two battery modules are correspondingly disposed in the two receiving cavities.

6. The battery pack according to claim 5, characterized in that, The battery pack also includes a cooling plate disposed between the two receiving cavities, the cooling plate being configured to cool all the cells of the two battery modules.

7. The battery pack according to claim 5, characterized in that, The support includes a first plate group and a second plate group. Each battery module has a first plate group on its side facing away from the other battery module. The first plate group includes at least one limiting plate for supporting the battery module. The second plate group is disposed between the two first plate groups and is spaced apart from the two first plate groups respectively. The second plate group includes two partitions spaced apart along the second direction. The receiving cavity is defined between each first plate group and the two partitions. The limiting plate and the partitions are configured to apply pressure to the battery module along the third direction respectively.

8. The battery pack according to claim 7, characterized in that, The limiting plate extends along the first direction, and the bracket further includes an end plate and a side pressure plate. The battery module has the end plate at both ends along the first direction, and the end plate is connected to the limiting plate and the partition at both ends along the third direction. The end plates on both sides are configured to apply pressure to the battery module along the first direction. The battery module has the side pressure plate at both ends along the third direction, and the side pressure plate is connected to the limiting plate of the two first plate groups at both ends along the third direction. The partition is connected to the side pressure plate, and the side pressure plates on both sides are configured to apply pressure to the battery module along the second direction.

9. The battery pack according to claim 5, characterized in that, Each of the battery modules further includes an integrated busbar connected to the terminal of each of the battery cells. The battery pack also includes a connector, through which the integrated busbars of two battery modules are electrically connected.

10. An energy storage device, characterized in that, It includes the battery pack as described in any one of claims 1 to 9.

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