WO2024016716A1 - Safety protection device for pack battery pack - Google Patents

Safety protection device for pack battery pack Download PDF

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Publication number
WO2024016716A1
WO2024016716A1 PCT/CN2023/084550 CN2023084550W WO2024016716A1 WO 2024016716 A1 WO2024016716 A1 WO 2024016716A1 CN 2023084550 W CN2023084550 W CN 2023084550W WO 2024016716 A1 WO2024016716 A1 WO 2024016716A1
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WO
WIPO (PCT)
Prior art keywords
plate
protection device
safety protection
battery
pack
Prior art date
Application number
PCT/CN2023/084550
Other languages
French (fr)
Chinese (zh)
Inventor
陈少镇
周建兵
刘承勇
邓小邑
陈诚
Original Assignee
华为数字能源技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为数字能源技术有限公司 filed Critical 华为数字能源技术有限公司
Publication of WO2024016716A1 publication Critical patent/WO2024016716A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/571—Methods or arrangements for affording protection against corrosion; Selection of materials therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/593—Spacers; Insulating plates

Definitions

  • This application relates to the technical field of energy storage batteries, and in particular, to a safety protection device for pack battery packs.
  • the energy storage pack battery pack is the smallest unit of lithium battery energy storage and power supply. It has the function of storing electrical energy and supplying power to external loads. Whether the energy storage pack is safe and reliable will have an impact on the safety of lithium batteries and is the key to whether lithium battery products can mature.
  • Existing energy storage lithium battery pack boxes usually use metal boxes, and insulation protection is achieved through an insulating film between the battery core and the metal box. However, the protective ability of the insulating film is generally poor. If there are hard foreign objects left in the energy storage pack battery pack, it is easy to puncture or wear the insulating film. The battery shell will be short-circuited with the metal box, causing the chassis to be charged with high voltage. Even high-pressure ignition. In addition, when a certain battery cell leaks, the electrolyte will soak multiple surrounding battery cells, and the blue films of multiple battery cells will be corroded, leading to insulation failure.
  • the embodiment of the present application provides a safety protection device for a pack battery pack, which can avoid defects such as charging of the chassis caused by short circuit between the battery core and the box and negative short corrosion caused by battery leakage, and improves the insulation safety of the pack battery pack. level to reduce the risk of insulation failure of the pack battery pack.
  • a safety protection device for a pack battery pack includes multiple cells.
  • the device includes: a plastic base plate and a side protection component.
  • the plastic base plate includes a plurality of grooves;
  • the side protection component includes a side plate and an insulating film; wherein, the side plate is vertically arranged on the plastic base plate along the edge of the plastic base plate, and the side plate is connected to the plastic base plate.
  • the bottom plate surrounds an open container; the insulating film is arranged on the side of the side plate located in the container; the electric core is arranged in the container, wherein the electric core is placed on the plastic bottom plate and does not contact the inner surface of the groove.
  • insulated plastic bottom plates can fundamentally solve the problem of short circuits that may occur between the bottom surface of the battery core and the box.
  • the electrolyte in the battery core will flow into the groove provided in the plastic bottom plate and will not spread over a large area.
  • the parts adjacent to multiple grooves have a convex structure, which can be called a convex beam. Since the battery core is placed on the convex beam, the electrolyte leaking from the battery core will not soak into other surrounding battery cores, preventing the blue film of the battery core from being corroded, and thereby preventing the case from passing through between the battery cores.
  • the phenomenon of negative short corrosion failure caused by electrolyte short circuit is a convex beam.
  • it also includes: a plurality of buffer pads, all fixedly connected to the insulating film, and all perpendicular to the plastic bottom plate, and the plurality of buffer pads are arranged between the plurality of battery cores to separate the multiple batteries. core.
  • Cushion pads can insulate between multiple cells, and can also play a role in separating and fixing cells. It can improve the insulation effect of multiple battery cells combined and make the structure more compact.
  • the plurality of grooves have the same shape and size.
  • the plurality of grooves are all rectangular. Since multiple battery cells are supported by convex beams, the convex beams formed by grooves of the same shape are also of the same size, which is conducive to the regular arrangement of battery cells, making the grouping efficiency of the pack battery pack high, and improving the efficiency of the pack battery pack. Energy efficiency per unit volume.
  • a first glue layer is further provided between the side plate and the insulating film for fixing the side plate and the insulating film.
  • the insulating film can be pasted and fixed on the side plate through the sticky first adhesive layer, so that the insulating film and the side plate can be connected more closely. In addition, there is also good insulation between the side plate and the battery core.
  • the side plate is in a right-angled U shape and includes: a first side plate, a second side plate and a third side plate; wherein the first side plate and the second side plate are arranged in parallel; One side plate and the second side plate are perpendicular to the third side plate respectively.
  • An internal space with a regular shape can be more conducive to arranging more cells.
  • the insulating film includes a first insulating film and a second insulating film; wherein the first insulating film is disposed on the first side plate; and the second insulating film is disposed on the second side plate.
  • the side plate is made of metal material.
  • the plastic base plate further includes: a first control box, which is provided at the end of the side protection component and is used to install the battery management unit and the fan.
  • it also includes: a first end plate and a second end plate, the first end plate is arranged near the first control box; the second end plate is arranged near the third side plate; the first end plate parallel to the second end plate.
  • the cells arranged between the first end plate and the second end plate are tightly fixed together through the first end plate and the second end plate, so that relative displacement will not occur due to external shaking or external force, and the stability is higher.
  • the pack battery pack includes multiple cells.
  • the device includes: a plastic shell, the plastic shell includes: a bottom plate, including a plurality of grooves; side plates, vertically arranged on the bottom plate along the edge of the bottom plate, and the side plates and the bottom plate form an open container; a plurality of battery cores are arranged
  • a plastic case multiple electric cores are placed on the bottom plate and are not in contact with the inner surface of the groove.
  • the use of insulated plastic shells can fundamentally solve the problem of possible short circuits between the bottom surface of the battery core and the box, and between the battery core and the side panels.
  • the electrolyte in the battery core will flow into the groove provided in the plastic bottom plate and will not spread over a large area.
  • the parts adjacent to multiple grooves have a convex structure, which can be called a convex beam. Since multiple battery cells are placed on the convex beam, the electrolyte leaking from the battery core will not soak into other surrounding battery cells, preventing the blue film of the battery core from being corroded, and thereby avoiding the need for shells between battery cells.
  • it also includes: a plurality of plastic spacers arranged on the side panels, and the plurality of plastic spacers are spaced at equal intervals. Multiple plastic spacers are used to limit the position of multiple battery cores to separate multiple battery cores. In addition, multiple plastic spacers can also play a role in fixing and tightening the battery cores.
  • the plurality of grooves have the same shape and size.
  • the plurality of grooves are all rectangular. Since multiple cells are supported by convex beams, the convex beams formed by grooves of the same shape are also of the same size, which is conducive to the regular arrangement of cells inside the pack battery pack. The grouping efficiency of the pack battery pack is high, and the efficiency of the pack battery pack is improved. The energy efficiency per unit volume of the pack battery pack.
  • the base plate further includes: a second glue layer, and the second glue layer is disposed in the middle of the base plate for fixing the battery core. Fixing the battery core located in the middle of the bottom plate with the bottom plate through the second adhesive layer can fix the battery core on the bottom plate with higher stability.
  • the shape of the side panel is a right-angled U-shape, including: a first side panel, a second side panel, and a third side panel; wherein the first side panel and the second side panel The side panels are arranged in parallel; the first side panel and the second side panel are respectively perpendicular to the third side panel.
  • An internal space with a regular shape can be more conducive to arranging more cells.
  • the plastic case further includes: a second control box, which is provided at one end of the plastic case and is used to install a battery management unit and a fan.
  • it also includes: a third end plate and a fourth end plate, the third end plate is arranged on the second control box near; the fourth end plate is arranged near the third side plate; the third end plate is parallel to the fourth end plate.
  • the cells arranged between the third end plate and the fourth end plate are tightly fixed together through the third end plate and the fourth end plate. They will not cause relative displacement due to external shaking or external force, and the internal stability of the lithium battery is stable. Sex is higher.
  • Figure 1 is an exploded view of the structure of a safety protection device for pack battery packs provided by an embodiment of the present application
  • Figure 2 is a schematic structural diagram of a plastic bottom plate provided by an embodiment of the present application.
  • Figure 3 is a schematic assembly diagram of a safety protection device for a battery pack provided by an embodiment of the present application
  • Figure 4 is an exploded view of the structure of another safety protection device for pack battery packs provided by the embodiment of the present application.
  • Figure 5 is a schematic structural diagram of a plastic shell provided by an embodiment of the present application.
  • Figure 6 is a schematic assembly diagram of another safety protection device for a battery pack provided by an embodiment of the present application.
  • the energy storage lithium battery pack is the smallest unit for energy storage and power supply. Whether the pack is safe and reliable will have an impact on the safety of lithium batteries and is the key to whether lithium battery products can mature. Pack safety mainly includes functional safety, insulation safety, thermal runaway safety and mechanical safety. At present, the insulation safety protection of packs is not yet mature.
  • the box of the pack group is made of sheet metal material, which has poor insulation and corrosion resistance, which affects the safety of lithium energy storage batteries.
  • FIG. 1 is an exploded view of the structure of a safety protection device for a battery pack provided by an embodiment of the present application.
  • a safety protection device for a pack battery pack is proposed.
  • the pack battery pack includes a plurality of cells 12 .
  • the device includes: a plastic base plate 9 and a side protection assembly 15.
  • the plastic base plate 9 includes a plurality of grooves 10.
  • the adjacent parts of the plurality of grooves 10 have convex structures, which can be called convex beams 11; that is, a plurality of convex beams 11 It is formed based on a plurality of grooves 10; the grooves 10 are used to contain the electrolyte that may leak from the battery core 12.
  • the side protection assembly 15 includes a side plate and an insulating film 1; wherein, the side plate is vertically arranged on the plastic base plate 9 along the edge of the plastic base plate 9, and the side plate and the plastic base plate 9 form an open container; the plastic base plate 9 and the side plate are Rivets 7 can be used to fix the space.
  • the insulating film 1 is disposed on the side of the side plate located in the container; the battery core 12 is disposed in the container, where the battery core 12 is placed on the convex beam 11 and does not contact the inner surface of the groove 10 .
  • the plastic bottom plate 9 can be made by injection molding process.
  • the shape and size of the grooves 10 on the plastic bottom plate 9 can be set according to the shape and size of the battery core 12, so that the battery core 12 can be placed in multiple adjacent grooves 10. on the convex beam 11.
  • the groove 10 must be provided so that all the battery cores 12 will not fall into the groove 10 . It should be noted that when multiple battery cores 12 are arranged in an array, the battery cores 12 are in an electrical connection state.
  • FIG 2 is a schematic structural diagram of the plastic bottom plate 9 provided by the embodiment of the present application.
  • the plastic bottom plate 9 is provided with a plurality of grooves 10, and the shapes and sizes of the plurality of grooves 10 can be the same or different.
  • the plurality of grooves 10 may be rectangular. Since the plurality of battery cells 12 are supported by the convex beams 11, the convex beams 11 formed by the grooves 10 of the same shape are also of the same size, which is conducive to the regular arrangement of the battery cells 12, making the grouping efficiency of the pack battery pack high, and The energy efficiency per unit volume of the pack battery pack is improved.
  • the use of the insulating plastic bottom plate 9 can fundamentally solve the short circuit problem that may occur between the bottom surface of the battery core 12 and the box body.
  • the electrolyte in the battery core 12 will flow into the groove 10 provided in the plastic bottom plate 9 and will not spread over a large area. Since the battery core 12 is placed on the convex beam 11, , the electrolyte leaking from the battery core 12 will not soak into other surrounding battery cores 12, preventing the blue film of the battery core 12 from being corroded, thereby avoiding the negative short circuit caused by the short circuit of the casings of the battery core 12 through the electrolyte. The phenomenon of corrosion failure.
  • a second glue layer is provided between the bottom of the battery core 12 and the plastic bottom plate 9 .
  • the second glue layer may be a structural glue layer. Structural glue is used as the adhesive.
  • the second glue layer will The electric core 12 and the plastic base plate 9 are bonded together to improve stability.
  • the protective device may also include: multiple buffer pads 2 , each of which is fixedly connected to the insulating film 1 and perpendicular to the plastic base plate 9 .
  • Multiple buffer pads 2 may be disposed between multiple battery cores 12 to separate the multiple battery cores 12 .
  • the buffer pad 2 is made of insulating material.
  • the buffer pad 2 plays an insulating role between the plurality of battery cores 12 , and on the other hand, it can also play a role in separating and fixing the battery cores 12 .
  • Using buffer pads 2 to isolate multiple battery cells 12 can improve the insulation effect of the combination of multiple battery cells 12 and make the structure more compact.
  • a first glue layer may also be provided between the side plate and the insulating film 1 for fixing the side plate and the insulating film 1 .
  • the first adhesive layer may be a structural adhesive layer, using structural adhesive as the adhesive.
  • the insulating film 1 can be pasted and fixed on the side plate through the sticky first adhesive layer, so that the insulating film 1 and the side plate can be connected more closely. In addition, there is also good insulation between the side plate and the battery core 12 .
  • the shape of the side panels is a right-angled U, that is, a rectangle with one side open. It includes: a first side plate 3, a second side plate 4 and a third side plate 5; wherein the first side plate 3 and the second side plate 4 are arranged in parallel; the first side plate 3 and the second side plate 4 are respectively connected with the third side plate. Three side panels 5 vertical. An internal space with a regular shape can be more convenient for arranging more battery cells 12 .
  • the insulating film 1 may also include a first insulating film 1 and a second insulating film 1; wherein the first insulating film 1 is disposed on the first side plate 3; the second insulating film 1 is disposed on the second side plate 4.
  • the side plates may be made of metal materials.
  • the plastic base plate 9 may also include: a first control box 14, which is provided at the end of the side protection component 15 and is used to install functional modules such as a battery management unit (Battery Management Unit, BMU) and a fan.
  • a battery management unit Battery Management Unit, BMU
  • BMU Battery Management Unit
  • the protective device may also include: a first end plate 13 and a second end plate 8.
  • the first end plate 13 is provided near the first control box 14; the second end plate 8 is provided on the third side plate 5 Nearby; the first end plate 13 is parallel to the second end plate 8.
  • the battery cores 12 arranged between the first end plate 13 and the second end plate 8 are tightly fixed together through the first end plate 13 and the second end plate 8, and will not cause relative displacement due to external shaking or external force. Greater stability.
  • the arrangement direction of the battery cells 12 can be perpendicular to the length direction of the pack or perpendicular to the width direction of the pack.
  • FIG 3 is a schematic assembly diagram of a safety protection device for a battery pack provided by an embodiment of the present application.
  • the plastic base plate 9 and the sheet metal side plate are fixed with rivets 7.
  • Lithium ion battery cells 12 are separated with buffer pads 2 and pasted into 12 groups of battery cells. Both ends are tightened with plastic end plates.
  • the side plates with the insulation film 1 and the grouped 12 battery cells are fixed with structural glue. , and then use screws 6 to connect the plastic end plates and side plates to form an integral module.
  • the module is then assembled with the plastic base plate 9 .
  • the module and the plastic base plate 9 can be bonded and fixed using structural adhesive.
  • FIG. 4 is an exploded view of the structure of another safety protection device for a battery pack provided by an embodiment of the present application.
  • a safety protection device for a pack battery pack is proposed.
  • the pack battery pack includes a plurality of cells 12 .
  • the device includes a plastic housing 16 that includes a bottom plate including a plurality of grooves 10 .
  • the adjacent parts of the plurality of grooves 10 have protruding structures, which can be called convex beams 11; that is, the plurality of convex beams 11 are formed according to the plurality of grooves 10; the grooves 10 are used to contain the electrolyte that may leak from the battery core 12 .
  • the side plates are vertically arranged on the bottom plate along the edge of the bottom plate, and the side plates and the bottom plate form an open container; a plurality of electric cores 12 are arranged in the plastic shell 16, wherein the plurality of electric cores 12 are placed on the protruding beam 11 on, and not in contact with the inner surface of the groove 10.
  • the plastic shell 16 can be made by injection molding.
  • the shape and size of the groove 10 on the bottom plate can be set according to the shape and size of the battery core 12, so that the battery core 12 can be placed in the convex shape formed by multiple adjacent grooves 10. On beam 11.
  • the groove 10 must be provided so that all the battery cores 12 will not fall into the groove 10 . It should be noted that when multiple battery cores 12 are arranged in an array, the battery cores 12 are in an electrical connection state.
  • Figure 5 is a schematic structural diagram of a plastic shell provided by an embodiment of the present application.
  • the plastic housing 16 is provided with a plurality of grooves 10 , and the shapes and sizes of the plurality of grooves 10 may be the same or different.
  • the plurality of grooves 10 may be rectangular. Since the plurality of battery cells 12 are supported by the convex beams 11, the convex beams 11 formed by the grooves 10 of the same shape are also of the same size, which is conducive to the regular arrangement of the battery cells 12, making the grouping efficiency of the pack battery pack high, and The energy efficiency per unit volume of the pack battery pack is improved.
  • an insulated plastic case 16 can fundamentally solve the possible short-circuit problems between the bottom surface of the battery core 12 and the box, and between the battery core 12 and the side panels.
  • the electrolyte in the battery core 12 will flow into the groove 10 provided on the plastic bottom plate 9 and will not spread over a large area because multiple battery cores 12 are placed on the convex beam 11 , therefore, the electrolyte leaking from the battery core 12 will not soak into other surrounding battery cores 12, preventing the blue film of the battery core 12 from being corroded, thereby avoiding the short-circuiting of the shells between the battery cores 12 caused by the electrolyte.
  • the phenomenon of negative short corrosion failure is the phenomenon of negative short corrosion failure.
  • the protective device may also include: a plurality of plastic spacers 19, the plurality of plastic spacers 19 are arranged on the side panels, and the plurality of plastic spacers 19 are equally spaced.
  • a plurality of plastic spacers 19 are used to limit the positions of the plurality of battery cores 12 to separate the plurality of battery cores 12.
  • the plurality of plastic spacers 19 can also play a role in fixing and tightening the battery cores 12.
  • a second glue layer may also be disposed on the base plate.
  • the second glue layer is disposed in the middle of the base plate for fixing the battery core 12 .
  • the second adhesive layer may be a structural adhesive layer, using structural adhesive as the adhesive.
  • the battery core 12 located in the middle of the bottom plate is fixed to the bottom plate through the second glue layer, so that the battery core 12 can be fixed on the bottom plate and the stability is higher.
  • the shape of the side panels is a right-angled U, that is, a rectangle with one side open. It includes: a first side panel, a second side panel and a third side panel; wherein, the first side panel and the second side panel are arranged in parallel; the first side panel and the second side panel are respectively connected with the third side panel. Three side panels are vertical. An internal space with a regular shape can be more convenient for arranging more battery cells 12 .
  • the protection device may also include: a second control box 20 , which is provided at one end of the plastic housing 16 and is used to install functional modules such as a battery management unit and a fan.
  • the protective device may further include: a third end plate 17 and a fourth end plate 18.
  • the third end plate 17 is disposed near the second control box 20; the fourth end plate 18 is disposed on the third side plate. Nearby; the third end plate 17 and the fourth end plate 18 are parallel.
  • the battery cores 12 arranged between the third end plate 17 and the fourth end plate 18 are tightly fixed together through the third end plate 17 and the fourth end plate 18, and will not cause relative displacement due to external shaking or external force. The internal stability of lithium batteries is higher.
  • FIG. 6 is a schematic assembly diagram of another safety protection device for a battery pack provided by an embodiment of the present application.
  • the plastic housing 16 is fixed to the third end plate 17 and the fourth end plate 18 with screws 6 .
  • the lithium ion battery cells 12 can be separated by plastic spacers 19 and pasted into groups of 12 battery cells, and the two ends are tightened with end plates.
  • the side panels and the 12 battery core groups can be fixed with structural glue to form an integral module. Then glue the module together with the base plate.
  • the module and the base plate can be bonded and fixed using structural adhesive.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

A safety protection device for a pack battery pack. The pack battery pack comprises a plurality of battery cells. The device comprises: a plastic bottom plate comprising a plurality of grooves; and a side protection assembly comprising side plates and insulating films, wherein the side plates are vertically arranged on the plastic bottom plate along the edge of the plastic bottom plate, and the side plates and the plastic bottom plate define an open container; each insulating film is arranged on the side of the side plate located in the container; and the plurality of battery cells are arranged in the container, wherein the plurality of battery cells are placed on the plastic bottom plate and are not in contact with the inner surfaces of the grooves. The present application can avoid the defects such as charging of a case caused by short circuit between a battery cell and a case body and negative short circuit corrosion caused by electrolyte leakage of the battery cell, increase the insulation safety level of a pack battery pack, and reduce the insulation failure risk of the pack battery pack.

Description

一种用于pack电池包的安全防护装置A safety protection device for battery packs
本申请要求于2022年7月18日提交中国国家知识产权局、申请号为202221852610.0、申请名称为“一种用于pack电池包的安全防护装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application requires the priority of the Chinese patent application submitted to the State Intellectual Property Office of China on July 18, 2022, with the application number 202221852610.0 and the application name "A safety protection device for pack battery packs", and its entire content has been approved This reference is incorporated into this application.
技术领域Technical field
本申请涉及储能电池技术领域，尤其涉及一种用于pack电池包的安全防护装置。This application relates to the technical field of energy storage batteries, and in particular, to a safety protection device for pack battery packs.
背景技术Background technique
储能pack电池包是锂电池储能供电的最小单元，具有存储电能和为外部负载供电的功能。储能pack电池包是否安全、可靠会对锂电池的安全性产生影响，是锂电池产品能否走向成熟的关键。现有的储能锂电pack电池包箱体通常采用金属箱体，电芯与金属箱体之间通过绝缘膜来实现绝缘防护。但是，绝缘膜防护能力普遍较差，如有坚硬异物残留在储能pack电池包中，极易刺穿或磨损绝缘膜，电芯壳体会与金属箱体短接，导致机箱带高压电，甚至高压打火。另外，在某一电芯发生漏液的情况下，电解液会浸泡周围的多个电芯，多个电芯蓝膜被腐蚀导致绝缘失效。The energy storage pack battery pack is the smallest unit of lithium battery energy storage and power supply. It has the function of storing electrical energy and supplying power to external loads. Whether the energy storage pack is safe and reliable will have an impact on the safety of lithium batteries and is the key to whether lithium battery products can mature. Existing energy storage lithium battery pack boxes usually use metal boxes, and insulation protection is achieved through an insulating film between the battery core and the metal box. However, the protective ability of the insulating film is generally poor. If there are hard foreign objects left in the energy storage pack battery pack, it is easy to puncture or wear the insulating film. The battery shell will be short-circuited with the metal box, causing the chassis to be charged with high voltage. Even high-pressure ignition. In addition, when a certain battery cell leaks, the electrolyte will soak multiple surrounding battery cells, and the blue films of multiple battery cells will be corroded, leading to insulation failure.
发明内容Contents of the invention
本申请实施例提供了一种用于pack电池包的安全防护装置，能够避免电芯与箱体短接导致的机箱带电以及电芯漏液导致的负短腐蚀等缺陷，提升pack电池包绝缘安全等级，降低pack电池包绝缘失效风险。The embodiment of the present application provides a safety protection device for a pack battery pack, which can avoid defects such as charging of the chassis caused by short circuit between the battery core and the box and negative short corrosion caused by battery leakage, and improves the insulation safety of the pack battery pack. level to reduce the risk of insulation failure of the pack battery pack.
第一方面，提出了一种用于pack电池包的安全防护装置，pack电池包包括多个电芯。装置包括：塑料底板和侧边防护组件，塑料底板包括多个凹槽；侧边防护组件包括侧板和绝缘膜；其中，侧板沿塑料底板的边缘垂直设置在塑料底板上，侧板与塑料底板合围构成一开放容器；绝缘膜设置在侧板位于容器内的一侧；电芯设置于容器内，其中，电芯放置在塑料底板上，且与凹槽内表面不接触。采用绝缘的塑料底板可以从根本上解决电芯底面与箱体间可能发生的短接问题。当电芯发生漏液时，电芯中的电解液会流入设置在塑料底板的凹槽内，不会大面积的扩散。多个凹槽相邻的部分具有凸起结构，可以称为凸梁。由于电芯是放置在凸梁上的，因此，电芯泄漏的电解液也不会浸泡到周边其他电芯，杜绝了电芯蓝膜被腐蚀的情况发生，进而避免了电芯间壳体通过电解液短接导致的负短腐蚀失效的现象。In the first aspect, a safety protection device for a pack battery pack is proposed. The pack battery pack includes multiple cells. The device includes: a plastic base plate and a side protection component. The plastic base plate includes a plurality of grooves; the side protection component includes a side plate and an insulating film; wherein, the side plate is vertically arranged on the plastic base plate along the edge of the plastic base plate, and the side plate is connected to the plastic base plate. The bottom plate surrounds an open container; the insulating film is arranged on the side of the side plate located in the container; the electric core is arranged in the container, wherein the electric core is placed on the plastic bottom plate and does not contact the inner surface of the groove. The use of insulated plastic bottom plates can fundamentally solve the problem of short circuits that may occur between the bottom surface of the battery core and the box. When the battery core leaks, the electrolyte in the battery core will flow into the groove provided in the plastic bottom plate and will not spread over a large area. The parts adjacent to multiple grooves have a convex structure, which can be called a convex beam. Since the battery core is placed on the convex beam, the electrolyte leaking from the battery core will not soak into other surrounding battery cores, preventing the blue film of the battery core from being corroded, and thereby preventing the case from passing through between the battery cores. The phenomenon of negative short corrosion failure caused by electrolyte short circuit.
在一种可能的实施方式中，还包括：多个缓冲垫，均与绝缘膜固定连接，且均垂直于塑料底板，多个缓冲垫设置在多个电芯之间，用于分隔多个电芯。缓冲垫可以在多个电芯之间起绝缘作用，还可以起到分隔固定电芯的作用。能够提升多个电芯组合在一起的绝缘效果，结构上也更加紧密。In a possible implementation, it also includes: a plurality of buffer pads, all fixedly connected to the insulating film, and all perpendicular to the plastic bottom plate, and the plurality of buffer pads are arranged between the plurality of battery cores to separate the multiple batteries. core. Cushion pads can insulate between multiple cells, and can also play a role in separating and fixing cells. It can improve the insulation effect of multiple battery cells combined and make the structure more compact.
在一种可能的实施方式中，多个凹槽形状、大小均相同。In a possible implementation, the plurality of grooves have the same shape and size.
在一种可能的实施方式中，多个凹槽均为矩形。由于多个电芯以凸梁为支撑，采用相同形状的凹槽形成的凸梁尺寸也相同，有利于电芯的规则排布，使pack电池包的成组效率高，并且提高了pack电池包单位体积下的能量效率。 In a possible implementation, the plurality of grooves are all rectangular. Since multiple battery cells are supported by convex beams, the convex beams formed by grooves of the same shape are also of the same size, which is conducive to the regular arrangement of battery cells, making the grouping efficiency of the pack battery pack high, and improving the efficiency of the pack battery pack. Energy efficiency per unit volume.
在一种可能的实施方式中，在侧板与绝缘膜之间还设置有第一胶层，用于固定侧板和绝缘膜。通过有粘性的第一胶层可以将绝缘膜粘贴固定在侧板上，可以使绝缘膜与侧板连接的更紧密，另外，侧板与电芯之间也具有良好的绝缘性。In a possible implementation, a first glue layer is further provided between the side plate and the insulating film for fixing the side plate and the insulating film. The insulating film can be pasted and fixed on the side plate through the sticky first adhesive layer, so that the insulating film and the side plate can be connected more closely. In addition, there is also good insulation between the side plate and the battery core.
在一种可能的实施方式中，侧板的形状为直角U形，包括：第一侧板、第二侧板及第三侧板；其中，第一侧板与第二侧板平行设置；第一侧板和第二侧板分别与第三侧板垂直。具有形状规则的内部空间可以更加有利于布置更多的电芯。In a possible implementation, the side plate is in a right-angled U shape and includes: a first side plate, a second side plate and a third side plate; wherein the first side plate and the second side plate are arranged in parallel; One side plate and the second side plate are perpendicular to the third side plate respectively. An internal space with a regular shape can be more conducive to arranging more cells.
在一种可能的实施方式中，绝缘膜包括第一绝缘膜和第二绝缘膜；其中，第一绝缘膜设置在第一侧板上；第二绝缘膜设置在第二侧板上。In a possible implementation, the insulating film includes a first insulating film and a second insulating film; wherein the first insulating film is disposed on the first side plate; and the second insulating film is disposed on the second side plate.
在一种可能的实施方式中，侧板由金属材料制作。In a possible implementation, the side plate is made of metal material.
在一种可能的实施方式中，塑料底板还包括：第一控制盒，设置在侧边防护组件的端部，用于安装电池管理单元及风扇。In a possible implementation, the plastic base plate further includes: a first control box, which is provided at the end of the side protection component and is used to install the battery management unit and the fan.
在一种可能的实施方式中，还包括：第一端板、第二端板，第一端板设置在第一控制盒附近；第二端板设置在第三侧板附近；第一端板与第二端板平行。通过第一端板和第二端板将第一端板和第二端板之间排布的电芯紧密固定在一起，不会因外部晃动或受到外力而产生相对位移，稳定性更高。In a possible implementation, it also includes: a first end plate and a second end plate, the first end plate is arranged near the first control box; the second end plate is arranged near the third side plate; the first end plate parallel to the second end plate. The cells arranged between the first end plate and the second end plate are tightly fixed together through the first end plate and the second end plate, so that relative displacement will not occur due to external shaking or external force, and the stability is higher.
另一方面，提出了一种用于pack电池包的安全防护装置，pack电池包包括多个电芯。装置包括：塑料壳体，塑料壳体包括：底板，包括多个凹槽；侧边板，沿底板的边缘垂直设置在底板上，侧边板与底板合围构成一开放容器；多个电芯设置在塑料壳体内，其中，多个电芯放置在底板上，且与凹槽内表面不接触。采用绝缘的塑料壳体可以从根本上解决电芯底面与箱体间、电芯与侧边板可能发生的短接问题。当电芯发生漏液时，电芯中的电解液会流入设置在塑料底板的凹槽内，不会大面积的扩散。多个凹槽相邻的部分具有凸起结构，可以称为凸梁。由于多个电芯是放置在凸梁上的，因此，电芯泄漏的电解液也不会浸泡到周边其他电芯，杜绝了电芯蓝膜被腐蚀的情况发生，进而避免了电芯间壳体通过电解液短接导致的负短腐蚀失效的现象。On the other hand, a safety protection device for a pack battery pack is proposed. The pack battery pack includes multiple cells. The device includes: a plastic shell, the plastic shell includes: a bottom plate, including a plurality of grooves; side plates, vertically arranged on the bottom plate along the edge of the bottom plate, and the side plates and the bottom plate form an open container; a plurality of battery cores are arranged In the plastic case, multiple electric cores are placed on the bottom plate and are not in contact with the inner surface of the groove. The use of insulated plastic shells can fundamentally solve the problem of possible short circuits between the bottom surface of the battery core and the box, and between the battery core and the side panels. When the battery core leaks, the electrolyte in the battery core will flow into the groove provided in the plastic bottom plate and will not spread over a large area. The parts adjacent to multiple grooves have a convex structure, which can be called a convex beam. Since multiple battery cells are placed on the convex beam, the electrolyte leaking from the battery core will not soak into other surrounding battery cells, preventing the blue film of the battery core from being corroded, and thereby avoiding the need for shells between battery cells. The phenomenon of negative short corrosion failure caused by short-circuiting of the body through the electrolyte.
在一种可能的实施方式中，还包括：多个塑料隔条，设置在侧边板上，且多个塑料隔条的间距相等。采用多个塑料隔条对多个电芯进行限位，起到分隔多个电芯的作用，另外，多个塑料隔条还可以起到固定加紧电芯的作用。In a possible implementation, it also includes: a plurality of plastic spacers arranged on the side panels, and the plurality of plastic spacers are spaced at equal intervals. Multiple plastic spacers are used to limit the position of multiple battery cores to separate multiple battery cores. In addition, multiple plastic spacers can also play a role in fixing and tightening the battery cores.
在一种可能的实施方式中，多个凹槽形状、大小均相同。In a possible implementation, the plurality of grooves have the same shape and size.
在一种可能的实施方式中，多个凹槽均为矩形。由于多个电芯以凸梁为支撑，采用相同形状的凹槽形成的凸梁尺寸也相同，有利于pack电池包内部的电芯规则排布，pack电池包的成组效率高，并且提高了pack电池包单位体积下的能量效率。In a possible implementation, the plurality of grooves are all rectangular. Since multiple cells are supported by convex beams, the convex beams formed by grooves of the same shape are also of the same size, which is conducive to the regular arrangement of cells inside the pack battery pack. The grouping efficiency of the pack battery pack is high, and the efficiency of the pack battery pack is improved. The energy efficiency per unit volume of the pack battery pack.
在一种可能的实施方式中，底板还包括：第二胶层，第二胶层设置在底板的中间，用于固定电芯。将位于底板中间的电芯通过第二胶层与底板固定，能够使电芯固定在底板上，稳定性更高。In a possible implementation, the base plate further includes: a second glue layer, and the second glue layer is disposed in the middle of the base plate for fixing the battery core. Fixing the battery core located in the middle of the bottom plate with the bottom plate through the second adhesive layer can fix the battery core on the bottom plate with higher stability.
在一种可能的实施方式中，侧边板的形状为直角U形，包括：第一侧边板、第二侧边板及第三侧边板；其中，第一侧边板与第二侧边板平行设置；第一侧边板和第二侧边板分别与第三侧边板垂直。具有形状规则的内部空间可以更加有利于布置更多的电芯。In a possible implementation, the shape of the side panel is a right-angled U-shape, including: a first side panel, a second side panel, and a third side panel; wherein the first side panel and the second side panel The side panels are arranged in parallel; the first side panel and the second side panel are respectively perpendicular to the third side panel. An internal space with a regular shape can be more conducive to arranging more cells.
在一种可能的实施方式中，塑料壳体还包括：第二控制盒，设置在塑料壳体的一端，用于安装电池管理单元及风扇。In a possible implementation, the plastic case further includes: a second control box, which is provided at one end of the plastic case and is used to install a battery management unit and a fan.
在一种可能的实施方式中，还包括：第三端板和第四端板，第三端板设置在第二控制盒 附近；第四端板设置在第三侧边板附近；第三端板与第四端板平行。通过第三端板和第四端板将第三端板和第四端板之间排布的电芯紧密固定在一起，不会因外部晃动或受到外力而产生相对位移，锂电池内部的稳定性更高。In a possible implementation, it also includes: a third end plate and a fourth end plate, the third end plate is arranged on the second control box near; the fourth end plate is arranged near the third side plate; the third end plate is parallel to the fourth end plate. The cells arranged between the third end plate and the fourth end plate are tightly fixed together through the third end plate and the fourth end plate. They will not cause relative displacement due to external shaking or external force, and the internal stability of the lithium battery is stable. Sex is higher.
附图说明Description of drawings
下面对实施例或现有技术描述中所需使用的附图作简单地介绍。The drawings needed to be used in the description of the embodiments or the prior art are briefly introduced below.
图1为本申请实施例提供的一种用于pack电池包的安全防护装置的结构***图；Figure 1 is an exploded view of the structure of a safety protection device for pack battery packs provided by an embodiment of the present application;
图2为本申请实施例提供的塑料底板结构示意图；Figure 2 is a schematic structural diagram of a plastic bottom plate provided by an embodiment of the present application;
图3为本申请实施例提供的一种用于pack电池包的安全防护装置的组装示意图；Figure 3 is a schematic assembly diagram of a safety protection device for a battery pack provided by an embodiment of the present application;
图4为本申请实施例提供的另一种用于pack电池包的安全防护装置的结构***图；Figure 4 is an exploded view of the structure of another safety protection device for pack battery packs provided by the embodiment of the present application;
图5为本申请实施例提供的塑料外壳结构示意图；Figure 5 is a schematic structural diagram of a plastic shell provided by an embodiment of the present application;
图6为本申请实施例提供的另一种用于pack电池包的安全防护装置的组装示意图。Figure 6 is a schematic assembly diagram of another safety protection device for a battery pack provided by an embodiment of the present application.
具体实施方式Detailed ways
储能锂电pack为储能供电的最小单元，pack是否安全、可靠会对锂电池的安全性产生影响，是锂电池产品能否走向成熟的关键。Pack安全主要包括功能安全、绝缘安全、热失控安全和机械安全等。目前pack的绝缘安全防护还不成熟，pack组的箱体采用金属钣金材料，绝缘性、耐腐蚀性差，影响储能锂电池的安全性。The energy storage lithium battery pack is the smallest unit for energy storage and power supply. Whether the pack is safe and reliable will have an impact on the safety of lithium batteries and is the key to whether lithium battery products can mature. Pack safety mainly includes functional safety, insulation safety, thermal runaway safety and mechanical safety. At present, the insulation safety protection of packs is not yet mature. The box of the pack group is made of sheet metal material, which has poor insulation and corrosion resistance, which affects the safety of lithium energy storage batteries.
图1为本申请实施例提供的一种用于pack电池包的安全防护装置结构***图。如图1所示，提出了一种用于pack电池包的安全防护装置，pack电池包包括多个电芯12。装置包括：塑料底板9和侧边防护组件15，塑料底板9包括多个凹槽10，多个凹槽10相邻的部分具有凸起结构，可以称为凸梁11；即多个凸梁11是根据多个凹槽10而形成；凹槽10用于盛装电芯12可能泄漏的电解液。侧边防护组件15包括侧板和绝缘膜1；其中，侧板沿塑料底板9的边缘垂直设置在塑料底板9上，侧板与塑料底板9合围构成一开放容器；塑料底板9与侧板之间可以使用铆钉7固定。绝缘膜1设置在侧板位于容器内的一侧；电芯12设置于容器内，其中，电芯12放置在凸梁11上，且与凹槽10内表面不接触。塑料底板9可以采用注塑工艺制作，塑料底板9上的凹槽10的形状、大小可以根据电芯12的形状及大小进行设置，需满足电芯12能够放置在多个相邻凹槽10所形成的凸梁11上。当多个电芯12排列设置在凸梁11上时，设置的凹槽10还需满足所有电芯12均不会掉入凹槽10内。需要说明的是，多个电芯12排列设置时，电芯12之间是电连接状态。Figure 1 is an exploded view of the structure of a safety protection device for a battery pack provided by an embodiment of the present application. As shown in FIG. 1 , a safety protection device for a pack battery pack is proposed. The pack battery pack includes a plurality of cells 12 . The device includes: a plastic base plate 9 and a side protection assembly 15. The plastic base plate 9 includes a plurality of grooves 10. The adjacent parts of the plurality of grooves 10 have convex structures, which can be called convex beams 11; that is, a plurality of convex beams 11 It is formed based on a plurality of grooves 10; the grooves 10 are used to contain the electrolyte that may leak from the battery core 12. The side protection assembly 15 includes a side plate and an insulating film 1; wherein, the side plate is vertically arranged on the plastic base plate 9 along the edge of the plastic base plate 9, and the side plate and the plastic base plate 9 form an open container; the plastic base plate 9 and the side plate are Rivets 7 can be used to fix the space. The insulating film 1 is disposed on the side of the side plate located in the container; the battery core 12 is disposed in the container, where the battery core 12 is placed on the convex beam 11 and does not contact the inner surface of the groove 10 . The plastic bottom plate 9 can be made by injection molding process. The shape and size of the grooves 10 on the plastic bottom plate 9 can be set according to the shape and size of the battery core 12, so that the battery core 12 can be placed in multiple adjacent grooves 10. on the convex beam 11. When multiple battery cores 12 are arranged in an array on the convex beam 11 , the groove 10 must be provided so that all the battery cores 12 will not fall into the groove 10 . It should be noted that when multiple battery cores 12 are arranged in an array, the battery cores 12 are in an electrical connection state.
图2为本申请实施例提供的塑料底板9结构示意图。如图2所示，塑料底板9设置有多个凹槽10，多个凹槽10的形状、大小可以相同，也可以不同。示例性地，多个凹槽10可以为矩形。由于多个电芯12以凸梁11为支撑，采用相同形状的凹槽10形成的凸梁11尺寸也相同，有利于电芯12的规则排布，使pack电池包的成组效率高，并且提高了pack电池包单位体积下的能量效率。Figure 2 is a schematic structural diagram of the plastic bottom plate 9 provided by the embodiment of the present application. As shown in Figure 2, the plastic bottom plate 9 is provided with a plurality of grooves 10, and the shapes and sizes of the plurality of grooves 10 can be the same or different. By way of example, the plurality of grooves 10 may be rectangular. Since the plurality of battery cells 12 are supported by the convex beams 11, the convex beams 11 formed by the grooves 10 of the same shape are also of the same size, which is conducive to the regular arrangement of the battery cells 12, making the grouping efficiency of the pack battery pack high, and The energy efficiency per unit volume of the pack battery pack is improved.
采用绝缘的塑料底板9可以从根本上解决电芯12底面与箱体间可能发生的短接问题。当电芯12发生漏液时，电芯12中的电解液会流入设置在塑料底板9的凹槽10内，不会大面积的扩散，由于电芯12是放置在凸梁11上的，因此，电芯12泄漏的电解液也不会浸泡到周边其他电芯12，杜绝了电芯12蓝膜被腐蚀的情况发生，进而避免了电芯12间壳体通过电解液短接导致的负短腐蚀失效的现象。 The use of the insulating plastic bottom plate 9 can fundamentally solve the short circuit problem that may occur between the bottom surface of the battery core 12 and the box body. When the battery core 12 leaks, the electrolyte in the battery core 12 will flow into the groove 10 provided in the plastic bottom plate 9 and will not spread over a large area. Since the battery core 12 is placed on the convex beam 11, , the electrolyte leaking from the battery core 12 will not soak into other surrounding battery cores 12, preventing the blue film of the battery core 12 from being corroded, thereby avoiding the negative short circuit caused by the short circuit of the casings of the battery core 12 through the electrolyte. The phenomenon of corrosion failure.
在一种可能的实施例中，电芯12的底部与塑料底板9之间设置有第二胶层，第二胶层可以是结构胶层，采用结构胶作为粘合剂，第二胶层将电芯12与塑料底板9粘接在一起，提高稳定性。In a possible embodiment, a second glue layer is provided between the bottom of the battery core 12 and the plastic bottom plate 9 . The second glue layer may be a structural glue layer. Structural glue is used as the adhesive. The second glue layer will The electric core 12 and the plastic base plate 9 are bonded together to improve stability.
在一种示例中，防护装置还可以包括：多个缓冲垫2，多个缓冲垫2均与绝缘膜1固定连接，且均垂直于塑料底板9。多个缓冲垫2可以设置在多个电芯12之间，用于分隔多个电芯12。缓冲垫2采用绝缘材料制作。缓冲垫2一方面在多个电芯12之间起绝缘作用，另一方面还可以起到分隔固定电芯12的作用。在多个电芯12之间使用缓冲垫2隔离，能够提升多个电芯12组合的绝缘效果，结构上也更加紧密。In one example, the protective device may also include: multiple buffer pads 2 , each of which is fixedly connected to the insulating film 1 and perpendicular to the plastic base plate 9 . Multiple buffer pads 2 may be disposed between multiple battery cores 12 to separate the multiple battery cores 12 . The buffer pad 2 is made of insulating material. On the one hand, the buffer pad 2 plays an insulating role between the plurality of battery cores 12 , and on the other hand, it can also play a role in separating and fixing the battery cores 12 . Using buffer pads 2 to isolate multiple battery cells 12 can improve the insulation effect of the combination of multiple battery cells 12 and make the structure more compact.
在侧板与绝缘膜1之间还可以设置有第一胶层，用于固定侧板和绝缘膜1。第一胶层可以是结构胶层，采用结构胶作为粘合剂。通过有粘性的第一胶层可以将绝缘膜1粘贴固定在侧板上，可以使绝缘膜1与侧板连接的更紧密，另外，侧板与电芯12之间也具有良好的绝缘性。A first glue layer may also be provided between the side plate and the insulating film 1 for fixing the side plate and the insulating film 1 . The first adhesive layer may be a structural adhesive layer, using structural adhesive as the adhesive. The insulating film 1 can be pasted and fixed on the side plate through the sticky first adhesive layer, so that the insulating film 1 and the side plate can be connected more closely. In addition, there is also good insulation between the side plate and the battery core 12 .
侧板的形状为直角U形，即一边开口的矩形。包括：第一侧板3、第二侧板4及第三侧板5；其中，第一侧板3与第二侧板4平行设置；第一侧板3和第二侧板4分别与第三侧板5垂直。具有形状规则的内部空间可以更加有利于布置更多的电芯12。绝缘膜1还可以包括第一绝缘膜1和第二绝缘膜1；其中，第一绝缘膜1设置在第一侧板3上；第二绝缘膜1设置在第二侧板4上。示例性地，侧板可以由金属材料制作。The shape of the side panels is a right-angled U, that is, a rectangle with one side open. It includes: a first side plate 3, a second side plate 4 and a third side plate 5; wherein the first side plate 3 and the second side plate 4 are arranged in parallel; the first side plate 3 and the second side plate 4 are respectively connected with the third side plate. Three side panels 5 vertical. An internal space with a regular shape can be more convenient for arranging more battery cells 12 . The insulating film 1 may also include a first insulating film 1 and a second insulating film 1; wherein the first insulating film 1 is disposed on the first side plate 3; the second insulating film 1 is disposed on the second side plate 4. For example, the side plates may be made of metal materials.
在一种示例中，塑料底板9还可以包括：第一控制盒14，设置在侧边防护组件15的端部，用于安装电池管理单元(Battery Management Unit，BMU)及风扇等功能模块。In one example, the plastic base plate 9 may also include: a first control box 14, which is provided at the end of the side protection component 15 and is used to install functional modules such as a battery management unit (Battery Management Unit, BMU) and a fan.
在一种示例中，防护装置还可以包括：第一端板13、第二端板8，第一端板13设置在第一控制盒14附近；第二端板8设置在第三侧板5附近；第一端板13与第二端板8平行。通过第一端板13和第二端板8将第一端板13和第二端板8之间排布的电芯12紧密固定在一起，不会因外部晃动或受到外力而产生相对位移，稳定性更高。In an example, the protective device may also include: a first end plate 13 and a second end plate 8. The first end plate 13 is provided near the first control box 14; the second end plate 8 is provided on the third side plate 5 Nearby; the first end plate 13 is parallel to the second end plate 8. The battery cores 12 arranged between the first end plate 13 and the second end plate 8 are tightly fixed together through the first end plate 13 and the second end plate 8, and will not cause relative displacement due to external shaking or external force. Greater stability.
当pack电池包箱体为矩形时，电芯12排布方向可以垂直于pack长度方向，也可以垂直于pack宽度方向。When the battery pack box is rectangular, the arrangement direction of the battery cells 12 can be perpendicular to the length direction of the pack or perpendicular to the width direction of the pack.
图3为本申请实施例提供的一种用于pack电池包的安全防护装置的组装示意图。如图3所示，塑料底板9与钣金侧板之间用铆钉7固定。锂离子电芯12用缓冲垫2隔开并粘贴成电芯12组，两端用塑料端板加紧，将贴有绝缘膜1的侧板与粘贴成组后的电芯12组用结构胶固定，再用螺钉6连接塑料端板和侧板，形成一个整体的模块。然后将模块与塑料底板9装配在一起。示例性地，模块与塑料底板9可以采用结构胶粘接固定。Figure 3 is a schematic assembly diagram of a safety protection device for a battery pack provided by an embodiment of the present application. As shown in Figure 3, the plastic base plate 9 and the sheet metal side plate are fixed with rivets 7. Lithium ion battery cells 12 are separated with buffer pads 2 and pasted into 12 groups of battery cells. Both ends are tightened with plastic end plates. The side plates with the insulation film 1 and the grouped 12 battery cells are fixed with structural glue. , and then use screws 6 to connect the plastic end plates and side plates to form an integral module. The module is then assembled with the plastic base plate 9 . For example, the module and the plastic base plate 9 can be bonded and fixed using structural adhesive.
图4为本申请实施例提供的另一种用于pack电池包的安全防护装置的结构***图。如图4所示，提出了一种用于pack电池包的安全防护装置，pack电池包包括多个电芯12。装置包括：塑料壳体16，塑料壳体16包括：底板，包括多个凹槽10。多个凹槽10相邻的部分具有凸起结构，可以称为凸梁11；即多个凸梁11根据多个凹槽10而形成；凹槽10用于盛装电芯12可能泄漏的电解液。侧边板，沿底板的边缘垂直设置在底板上，侧边板与底板合围构成一开放容器；多个电芯12设置在塑料壳体16内，其中，多个电芯12放置在凸梁11上，且与凹槽10内表面不接触。塑料壳体16可以采用注塑工艺制作，底板上的凹槽10形状、大小可以根据电芯12的形状及大小进行设置，需满足电芯12能够放置在多个相邻凹槽10所形成的凸梁11上。当多个电芯12排列设置在凸梁11上时，设置的凹槽10还需满足所有电芯12均不会掉入凹槽10内。需要说明的是，多个电芯12排列设置时，电芯12之间是电连接状态。 Figure 4 is an exploded view of the structure of another safety protection device for a battery pack provided by an embodiment of the present application. As shown in FIG. 4 , a safety protection device for a pack battery pack is proposed. The pack battery pack includes a plurality of cells 12 . The device includes a plastic housing 16 that includes a bottom plate including a plurality of grooves 10 . The adjacent parts of the plurality of grooves 10 have protruding structures, which can be called convex beams 11; that is, the plurality of convex beams 11 are formed according to the plurality of grooves 10; the grooves 10 are used to contain the electrolyte that may leak from the battery core 12 . The side plates are vertically arranged on the bottom plate along the edge of the bottom plate, and the side plates and the bottom plate form an open container; a plurality of electric cores 12 are arranged in the plastic shell 16, wherein the plurality of electric cores 12 are placed on the protruding beam 11 on, and not in contact with the inner surface of the groove 10. The plastic shell 16 can be made by injection molding. The shape and size of the groove 10 on the bottom plate can be set according to the shape and size of the battery core 12, so that the battery core 12 can be placed in the convex shape formed by multiple adjacent grooves 10. On beam 11. When multiple battery cores 12 are arranged in an array on the convex beam 11 , the groove 10 must be provided so that all the battery cores 12 will not fall into the groove 10 . It should be noted that when multiple battery cores 12 are arranged in an array, the battery cores 12 are in an electrical connection state.
图5为本申请实施例提供的塑料外壳结构示意图。如图5所示，塑料壳体16上设置有多个凹槽10，多个凹槽10的形状、大小可以相同，也可以不同。示例性地，多个凹槽10可以为矩形。由于多个电芯12以凸梁11为支撑，采用相同形状的凹槽10形成的凸梁11尺寸也相同，有利于电芯12的规则排布，使pack电池包的成组效率高，并且提高了pack电池包单位体积下的能量效率。Figure 5 is a schematic structural diagram of a plastic shell provided by an embodiment of the present application. As shown in FIG. 5 , the plastic housing 16 is provided with a plurality of grooves 10 , and the shapes and sizes of the plurality of grooves 10 may be the same or different. By way of example, the plurality of grooves 10 may be rectangular. Since the plurality of battery cells 12 are supported by the convex beams 11, the convex beams 11 formed by the grooves 10 of the same shape are also of the same size, which is conducive to the regular arrangement of the battery cells 12, making the grouping efficiency of the pack battery pack high, and The energy efficiency per unit volume of the pack battery pack is improved.
采用绝缘的塑料壳体16可以从根本上解决电芯12底面与箱体间、电芯12与侧边板可能发生的短接问题。当电芯12发生漏液时，电芯12中的电解液会流入设置在塑料底板9的凹槽10内，不会大面积的扩散，由于多个电芯12是放置在凸梁11上的，因此，电芯12泄漏的电解液也不会浸泡到周边其他电芯12，杜绝了电芯12蓝膜被腐蚀的情况发生，进而避免了电芯12间壳体通过电解液短接导致的负短腐蚀失效的现象。The use of an insulated plastic case 16 can fundamentally solve the possible short-circuit problems between the bottom surface of the battery core 12 and the box, and between the battery core 12 and the side panels. When the battery core 12 leaks, the electrolyte in the battery core 12 will flow into the groove 10 provided on the plastic bottom plate 9 and will not spread over a large area because multiple battery cores 12 are placed on the convex beam 11 , therefore, the electrolyte leaking from the battery core 12 will not soak into other surrounding battery cores 12, preventing the blue film of the battery core 12 from being corroded, thereby avoiding the short-circuiting of the shells between the battery cores 12 caused by the electrolyte. The phenomenon of negative short corrosion failure.
在一种可能的实施例中，防护装置还可以包括：多个塑料隔条19，多个塑料隔条19设置在侧边板上，且多个塑料隔条19的间距相等。采用多个塑料隔条19对多个电芯12进行限位，起到分隔多个电芯12的作用，另外，多个塑料隔条19还可以起到固定加紧电芯12的作用。In a possible embodiment, the protective device may also include: a plurality of plastic spacers 19, the plurality of plastic spacers 19 are arranged on the side panels, and the plurality of plastic spacers 19 are equally spaced. A plurality of plastic spacers 19 are used to limit the positions of the plurality of battery cores 12 to separate the plurality of battery cores 12. In addition, the plurality of plastic spacers 19 can also play a role in fixing and tightening the battery cores 12.
在一种可能的实施例中，底板上还可以设置：第二胶层，第二胶层设置在底板的中间，用于固定电芯12。第二胶层可以是结构胶层，采用结构胶作为粘合剂。将位于底板中间的电芯12通过第二胶层与底板固定，能够使电芯12固定在底板上，稳定性更高。In a possible embodiment, a second glue layer may also be disposed on the base plate. The second glue layer is disposed in the middle of the base plate for fixing the battery core 12 . The second adhesive layer may be a structural adhesive layer, using structural adhesive as the adhesive. The battery core 12 located in the middle of the bottom plate is fixed to the bottom plate through the second glue layer, so that the battery core 12 can be fixed on the bottom plate and the stability is higher.
侧边板的形状为直角U形，即一边开口的矩形。包括：第一侧边板、第二侧边板及第三侧边板；其中，第一侧边板与第二侧边板平行设置；第一侧边板和第二侧边板分别与第三侧边板垂直。具有形状规则的内部空间可以更加有利于布置更多的电芯12。The shape of the side panels is a right-angled U, that is, a rectangle with one side open. It includes: a first side panel, a second side panel and a third side panel; wherein, the first side panel and the second side panel are arranged in parallel; the first side panel and the second side panel are respectively connected with the third side panel. Three side panels are vertical. An internal space with a regular shape can be more convenient for arranging more battery cells 12 .
在一种示例中，防护装置还可以包括：第二控制盒20，设置在塑料壳体16的一端，用于安装电池管理单元及风扇等功能模块。In one example, the protection device may also include: a second control box 20 , which is provided at one end of the plastic housing 16 and is used to install functional modules such as a battery management unit and a fan.
在一种示例中，防护装置还可以包括：第三端板17和第四端板18，第三端板17设置在第二控制盒20附近；第四端板18设置在第三侧边板附近；第三端板17与第四端板18平行。通过第三端板17和第四端板18将第三端板17和第四端板18之间排布的电芯12紧密固定在一起，不会因外部晃动或受到外力而产生相对位移，锂电池内部的稳定性更高。In one example, the protective device may further include: a third end plate 17 and a fourth end plate 18. The third end plate 17 is disposed near the second control box 20; the fourth end plate 18 is disposed on the third side plate. Nearby; the third end plate 17 and the fourth end plate 18 are parallel. The battery cores 12 arranged between the third end plate 17 and the fourth end plate 18 are tightly fixed together through the third end plate 17 and the fourth end plate 18, and will not cause relative displacement due to external shaking or external force. The internal stability of lithium batteries is higher.
图6为本申请实施例提供的另一种用于pack电池包的安全防护装置的组装示意图。如图6所示，塑料壳体16与第三端板17、第四端板18之间用螺钉6固定。锂离子电芯12可以用塑料隔条19隔开并粘贴成电芯12组，两端用端板加紧。侧边板与电芯12组可以用结构胶固定，构成一个整体的模块。然后将模块与底板粘贴在一起。示例性地，模块与底板可以采用结构胶粘接固定。Figure 6 is a schematic assembly diagram of another safety protection device for a battery pack provided by an embodiment of the present application. As shown in FIG. 6 , the plastic housing 16 is fixed to the third end plate 17 and the fourth end plate 18 with screws 6 . The lithium ion battery cells 12 can be separated by plastic spacers 19 and pasted into groups of 12 battery cells, and the two ends are tightened with end plates. The side panels and the 12 battery core groups can be fixed with structural glue to form an integral module. Then glue the module together with the base plate. For example, the module and the base plate can be bonded and fixed using structural adhesive.
以上所述，仅为本申请较佳的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到的变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应该以权利要求的保护范围为准。 The above are only preferred specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any person familiar with the technical field can easily think of changes or modifications within the technical scope disclosed in the present application. Replacements shall be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims (18)

  1. 一种用于pack电池包的安全防护装置，所述pack电池包包括多个电芯，其特征在于，装置包括：A safety protection device for a pack battery pack, the pack battery pack includes a plurality of cells, characterized in that the device includes:
    塑料底板，所述塑料底板包括多个凹槽；a plastic base plate, the plastic base plate including a plurality of grooves;
    侧边防护组件，所述侧边防护组件包括侧板和绝缘膜；其中，所述侧板沿所述塑料底板的边缘垂直设置在所述塑料底板上，所述侧板与所述塑料底板合围构成一开放容器；所述绝缘膜设置在所述侧板位于所述容器内的一侧；Side protection assembly, the side protection assembly includes a side plate and an insulating film; wherein, the side plate is vertically arranged on the plastic base plate along the edge of the plastic base plate, and the side plate is surrounded by the plastic base plate Constructing an open container; the insulating film is provided on the side of the side plate located in the container;
    所述多个电芯设置于所述容器内，其中，所述多个电芯放置在所述塑料底板上，且与所述凹槽的内表面不接触。The plurality of electric cores are arranged in the container, wherein the plurality of electric cores are placed on the plastic bottom plate and are not in contact with the inner surface of the groove.
  2. 如权利要求1所述的安全防护装置，其特征在于，还包括：The safety protection device according to claim 1, further comprising:
    多个缓冲垫，均与所述绝缘膜固定连接，且均垂直于所述塑料底板，所述多个缓冲垫设置在所述多个电芯之间，用于分隔所述多个电芯。A plurality of buffer pads are fixedly connected to the insulating film and are perpendicular to the plastic bottom plate. The multiple buffer pads are arranged between the plurality of battery cores and used to separate the multiple battery cores.
  3. 如权利要求1-2任一项所述的安全防护装置，其特征在于，所述多个凹槽形状、大小均相同。The safety protection device according to any one of claims 1-2, wherein the plurality of grooves have the same shape and size.
  4. 如权利要求1-3任一项所述的安全防护装置，其特征在于，所述多个凹槽均为矩形。The safety protection device according to any one of claims 1 to 3, characterized in that the plurality of grooves are all rectangular.
  5. 如权利要求1-4任一项所述的安全防护装置，其特征在于，在所述侧板与所述绝缘膜之间还设置有第一胶层，用于固定所述侧板和绝缘膜。The safety protection device according to any one of claims 1 to 4, characterized in that a first glue layer is further provided between the side plate and the insulating film for fixing the side plate and the insulating film. .
  6. 如权利要求1-5任一项所述的安全防护装置，其特征在于，所述侧板的形状为直角U形，包括：The safety protection device according to any one of claims 1 to 5, characterized in that the shape of the side plate is a right-angled U-shape, including:
    第一侧板、第二侧板及第三侧板；其中，The first side panel, the second side panel and the third side panel; wherein,
    所述第一侧板与所述第二侧板平行设置；The first side plate and the second side plate are arranged parallel;
    所述第一侧板和所述第二侧板分别与所述第三侧板垂直。The first side plate and the second side plate are respectively perpendicular to the third side plate.
  7. 如权利要求6所述的安全防护装置，其特征在于，所述绝缘膜包括第一绝缘膜和第二绝缘膜；其中，The safety protection device according to claim 6, wherein the insulating film includes a first insulating film and a second insulating film; wherein,
    所述第一绝缘膜设置在所述第一侧板上；The first insulating film is provided on the first side plate;
    所述第二绝缘膜设置在所述第二侧板上。The second insulating film is provided on the second side plate.
  8. 如权利要求1-7任一项所述的安全防护装置，其特征在于，所述侧板由金属材料制作。The safety protection device according to any one of claims 1 to 7, characterized in that the side plate is made of metal material.
  9. 如权利要求6所述的安全防护装置，其特征在于，所述塑料底板还包括：The safety protection device according to claim 6, wherein the plastic base plate further includes:
    第一控制盒，设置在所述侧边防护组件的端部，用于安装电池管理单元及风扇。The first control box is provided at the end of the side protection component and is used to install the battery management unit and the fan.
  10. 如权利要求9所述的安全防护装置，其特征在于，还包括：The safety protection device according to claim 9, further comprising:
    第一端板，设置在所述第一控制盒附近；A first end plate, arranged near the first control box;
    第二端板，设置在所述第三侧板附近；a second end plate arranged near the third side plate;
    所述第一端板与所述第二端板平行。The first end plate is parallel to the second end plate.
  11. 一种用于pack电池包的安全防护装置，所述pack电池包包括多个电芯，其特征在于，装置包括：塑料壳体，所述塑料壳体包括：A safety protection device for a pack battery pack. The pack battery pack includes a plurality of cells. It is characterized in that the device includes: a plastic shell, and the plastic shell includes:
    底板，所述底板包括多个凹槽；a base plate, the base plate including a plurality of grooves;
    侧边板，沿所述底板的边缘垂直设置在所述底板上，所述侧边板与所述底板合围构成一开放容器；Side plates are vertically arranged on the bottom plate along the edge of the bottom plate, and the side plates and the bottom plate enclose to form an open container;
    所述多个电芯设置在所述塑料壳体内，其中，所述多个电芯放置在所述底板上，且与所 述凹槽的内表面不接触。The plurality of electric cores are arranged in the plastic case, wherein the plurality of electric cores are placed on the bottom plate and connected with the The inner surfaces of the grooves do not touch.
  12. 如权利要求11所述的安全防护装置，其特征在于，还包括：The safety protection device according to claim 11, further comprising:
    多个塑料隔条，设置在所述侧边板上，且所述多个塑料隔条的间距相等。A plurality of plastic spacers are arranged on the side panels, and the spacing between the plurality of plastic spacers is equal.
  13. 如权利要求11-12任一项所述的安全防护装置，其特征在于，所述多个凹槽形状、大小均相同。The safety protection device according to any one of claims 11-12, wherein the plurality of grooves have the same shape and size.
  14. 如权利要求11-13任一项所述的安全防护装置，其特征在于，所述多个凹槽均为矩形。The safety protection device according to any one of claims 11 to 13, wherein the plurality of grooves are all rectangular.
  15. 如权利要求11-14任一项所述的安全防护装置，其特征在于，所述底板还包括：The safety protection device according to any one of claims 11 to 14, wherein the base plate further includes:
    第二胶层，设置在所述底板的中间，用于固定电芯。The second glue layer is arranged in the middle of the bottom plate and is used to fix the battery core.
  16. 如权利要求11-15任一项所述的安全防护装置，其特征在于，所述侧边板的形状为直角U形，包括：The safety protection device according to any one of claims 11 to 15, characterized in that the shape of the side plate is a right-angled U-shape, including:
    第一侧边板、第二侧边板及第三侧边板；其中，The first side panel, the second side panel and the third side panel; wherein,
    所述第一侧边板与所述第二侧边板平行设置；The first side panel and the second side panel are arranged parallel;
    所述第一侧边板和所述第二侧边板分别与所述第三侧边板垂直。The first side panel and the second side panel are respectively perpendicular to the third side panel.
  17. 如权利要求16所述的安全防护装置，其特征在于，所述塑料壳体还包括：The safety protection device according to claim 16, wherein the plastic shell further includes:
    第二控制盒，设置在所述塑料壳体的一端，用于安装电池管理单元及风扇。The second control box is provided at one end of the plastic housing and is used to install the battery management unit and the fan.
  18. 如权利要求17所述的安全防护装置，其特征在于，还包括：The safety protection device according to claim 17, further comprising:
    第三端板，设置在所述第二控制盒附近；A third end plate is provided near the second control box;
    第四端板，设置在所述第三侧边板附近；a fourth end plate, arranged near the third side plate;
    所述第三端板与所述第四端板平行。 The third end plate is parallel to the fourth end plate.
PCT/CN2023/084550 2022-07-18 2023-03-29 Safety protection device for pack battery pack WO2024016716A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN218770003U (en) * 2022-07-18 2023-03-28 华为数字能源技术有限公司 A safety device for pack battery pack

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JP2002083579A (en) * 2000-06-19 2002-03-22 Honda Motor Co Ltd Storage element and its holding structure
JP2008056194A (en) * 2006-09-04 2008-03-13 Toyota Motor Corp Tray for storage device
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CN211455751U (en) * 2019-12-26 2020-09-08 观致汽车有限公司 Battery module
CN113611948A (en) * 2021-08-02 2021-11-05 广州小鹏汽车科技有限公司 Battery module and battery pack
CN216928762U (en) * 2021-11-03 2022-07-08 华霆（合肥）动力技术有限公司 Battery pack and power battery system
CN218770003U (en) * 2022-07-18 2023-03-28 华为数字能源技术有限公司 A safety device for pack battery pack

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Publication number Priority date Publication date Assignee Title
JP2002083579A (en) * 2000-06-19 2002-03-22 Honda Motor Co Ltd Storage element and its holding structure
JP2008056194A (en) * 2006-09-04 2008-03-13 Toyota Motor Corp Tray for storage device
CN109411667A (en) * 2018-12-10 2019-03-01 广州市垠瀚能源科技有限公司 A kind of soft-package battery mould group
CN211455751U (en) * 2019-12-26 2020-09-08 观致汽车有限公司 Battery module
CN113611948A (en) * 2021-08-02 2021-11-05 广州小鹏汽车科技有限公司 Battery module and battery pack
CN216928762U (en) * 2021-11-03 2022-07-08 华霆（合肥）动力技术有限公司 Battery pack and power battery system
CN218770003U (en) * 2022-07-18 2023-03-28 华为数字能源技术有限公司 A safety device for pack battery pack

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