Battery pack

Abstract

The utility model provides a battery pack. The battery pack specifically comprises a bottom plate, an upper cover and an isolation baffle plate, the upper cover is arranged on the bottom plate, and an accommodating space is formed by the upper cover and the bottom plate; the isolation baffle is detachably arranged in the accommodating space and is used for isolating the battery module and the acquisition module which are arranged in the accommodating space; the battery module and the acquisition module which are arranged in the accommodating space are isolated by the isolation baffle, so that physical isolation exists between the battery module and the acquisition module, and the isolation baffle can effectively prevent high-temperature electrolyte and the like which are generated when the battery module is subjected to thermal runaway from being sprayed onto the isolation baffle; the normal operation of the acquisition module is effectively prevented from being influenced after thermal runaway of the battery pack, the acquisition module can normally acquire relevant parameters of the battery, and the battery management system can normally give an early warning, so that emergency time is provided for workers, and the safety of the battery pack is improved.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and more particularly to battery packs. Background Art

[0002] With the continuous consumption of non-renewable resources and the increasing prominence of environmental problems, the development of energy storage has been extremely rapid. Electrochemical energy storage should be based on safety, and corresponding means should be taken to control the temperature to prevent thermal runaway.

[0003] In related technologies, by improving the structure of the battery cells, the probability of thermal runaway of the battery cells is reduced, but it is still impossible to ensure that all the battery cells in the battery pack do not experience thermal runaway. However, after the thermal runaway of the battery pack, it will affect the normal operation of the acquisition module in the battery pack, resulting in the inability to promptly handle the thermal runaway. Summary of the Utility Model

[0004] Embodiments of this application provide a battery pack, aiming to effectively prevent the thermal runaway of the battery pack from affecting the normal operation of the acquisition module, ensuring that the acquisition module can normally collect relevant parameters of the battery, enabling the battery management system to give a normal warning, thereby providing emergency time for the staff and improving the safety of the battery pack.

[0005] Embodiments of this application provide a battery pack, including:

[0006] A bottom plate;

[0007] An upper cover, disposed on the bottom plate and forming a receiving space with the bottom plate;

[0008] An isolation baffle, detachably disposed in the receiving space for isolating the battery module and the acquisition module disposed in the receiving space.

[0009] In one embodiment, the upper cover is provided with a first mounting portion for mounting and fixing the isolation baffle; and / or,

[0010] The bottom plate is provided with a second mounting portion for mounting and fixing the isolation baffle.

[0011] In one embodiment, the first mounting portion is disposed on a side of the upper cover close to the bottom plate, and the first mounting portion is a slot structure.

[0012] In one embodiment, both side surfaces of the first mounting portion are provided with first fixing portions for fixing the isolation baffle.

[0013] In one embodiment, both side surfaces of the first mounting portion are provided with first mounting holes, and the isolation baffle is provided with second mounting holes. The first fixing portions are used to pass through the first mounting holes and the second mounting holes to fix the isolation baffle.

[0014] In one embodiment, the second mounting portion is disposed on a side of the bottom plate close to the upper cover, and the second mounting portion is a slot structure.

[0015] In one embodiment, second fixing portions are disposed on two side surfaces of the second mounting portion, and the second fixing portions are used for fixing the isolation baffle.

[0016] In one embodiment, third mounting holes are disposed on two side surfaces of the second mounting portion, fourth mounting holes are disposed on the isolation baffle, and the second fixing portions are used for passing through the third mounting holes and the fourth mounting holes to fix the isolation baffle.

[0017] In one embodiment, the isolation baffle divides the accommodation space into a first accommodation space and a second accommodation space;

[0018] The battery module and the acquisition module are respectively disposed in the first accommodation space and the second accommodation space.

[0019] In one embodiment, the battery pack further includes an acquisition wire harness, the acquisition wire harness is respectively connected to the battery module and the acquisition module, and a hole structure for enabling the acquisition wire harness to pass from the first accommodation space to the second accommodation space is disposed on the isolation baffle.

[0020] In one embodiment, the battery pack includes an opening and closing member, the opening and closing member is disposed on the isolation baffle, and the opening and closing member cooperates with the hole structure.

[0021] Advantageous effects of the embodiments of the present application:

[0022] In the embodiments of the present application, by disposing a detachable isolation baffle in the accommodation space formed by the bottom plate and the upper cover, and isolating the battery module and the acquisition module disposed in the accommodation space with the isolation baffle, a physical isolation is formed between the battery module and the acquisition module. The isolation baffle can effectively prevent high-temperature electrolyte and the like generated when the battery module has a thermal runaway from spraying onto the isolation baffle, effectively prevent the normal operation of the acquisition module from being affected after the battery pack has a thermal runaway, ensure that the acquisition module can normally acquire relevant parameters of the battery, enable the battery management system to give an early warning normally, thereby providing emergency time for the staff, improving the safety of the battery pack. At the same time, the detachable function of the isolation baffle can facilitate the installation and disassembly of the battery pack by the staff in the later stage, and facilitate the management and maintenance of the subsequent battery pack. Description of the Drawings

[0023] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0024] Figure 1 is an exploded schematic view of the battery pack provided by the embodiment of the present application;

[0025] Figure 2 is a three-dimensional schematic view of the battery pack provided by the embodiment of the present application;

[0026] Figure 3 is a bottom-up three-dimensional schematic view of the upper cover provided by the embodiment of the present application

[0027] Figure 4 is an assembled bottom-up three-dimensional schematic view of the upper cover and the isolation baffle provided by the embodiment of the present application;

[0028] Figure 5 is a three-dimensional schematic view of the bottom plate provided by the embodiment of the present application.

[0029] Marking description:

[0030] Battery pack 10, bottom plate 101, upper cover 102, isolation baffle 103, battery module 104, acquisition module 105, first installation part 106, second installation part 107, acquisition wire harness 108, hole structure 109, acquisition wire harness plug 110. Detailed implementation manners

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application. In addition, it should be understood that the specific implementation manners described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise stated, the orientation words such as "upper" and "lower" generally refer to the upper and lower in the actual use or working state of the device, specifically the drawing direction in the accompanying drawings; and "inner" and "outer" refer to the outline of the device.

[0032] In the related art, the probability of thermal runaway of the battery cell is reduced by improving the structure of the battery cell. However, it is still impossible to ensure that all the battery cells in the battery pack do not undergo thermal runaway. After the thermal runaway of the battery pack, it will affect the normal operation of the acquisition module in the battery pack, resulting in the thermal runaway not being processed in time. Therefore, the embodiment of the present application provides a battery pack. By providing a detachable isolation baffle in the accommodation space formed by the bottom plate and the upper cover, and isolating the isolation baffle between the battery module and the acquisition module in the accommodation space, a physical isolation is formed between the battery module and the acquisition module. The isolation baffle can effectively prevent high-temperature electrolyte and the like generated during the thermal runaway of the battery module from spraying onto the isolation baffle, effectively preventing the normal operation of the acquisition module from being affected after the thermal runaway of the battery pack, ensuring that the acquisition module can normally acquire relevant parameters of the battery, enabling the battery management system to give a normal warning, thereby providing emergency time for the staff and improving the safety of the battery pack. At the same time, the detachable function of the isolation baffle can facilitate the installation and disassembly of the battery pack by the staff in the later stage, and facilitate the management and maintenance of the subsequent battery pack. For the specific solution, please refer to the following specific description.

[0033] It should be noted that, hereinafter, the terms "battery module", "battery", "battery element", "battery cell" and "battery pack" can be used interchangeably and can refer to any one of various different rechargeable battery chemistries and configurations, including but not limited to lithium-ion (such as lithium iron phosphate, lithium cobalt oxide, lithium iron phosphate, other lithium metal oxides, etc.), lithium-ion polymer, nickel-metal hydride, nickel-cadmium, nickel-hydrogen, nickel-zinc, silver-zinc or other battery types / configurations. The term "electric vehicle" is used herein to refer to a fully electric vehicle also known as an EV, a plug-in hybrid vehicle also known as a PHEV, or a hybrid electric vehicle (HEV), where the hybrid electric vehicle uses multiple propulsion sources, one of which is an electric drive system. It should be understood that the same reference numerals are used to refer to the same components or components with equivalent functions on multiple drawings. Various modifications to the preferred embodiments, general principles and features described herein will be apparent to those skilled in the art. In addition, the drawings are only intended to illustrate the scope of the present application and not to limit it and should not be considered to be drawn to scale.

[0034] Embodiments of the present application can generally be applied to systems using electric motors. More specifically but not exclusively, they can be applied to electric vehicles using polyphase motors (such as induction motors). Electric vehicles use one or more energy storage sources, such as a battery pack, to supply electrical energy to the vehicle. This energy is at least partially used to propel the vehicle. The stored energy can also be used to provide the energy required by other vehicle systems, such as vehicle lighting, zoned heating, ventilation, and air conditioning (HVAC) systems, auxiliary control systems (such as sensors, displays, navigation systems, etc.), vehicle entertainment systems (such as radios, DVDs, MP3s, etc.), and so on. Conventional electric vehicles include passenger vehicles and vehicles designed to transport goods, examples of which include passenger cars, trucks, electric bicycles, and recreational boats. Electric vehicles also include dedicated work vehicles and carts, some of which can incorporate, for example, forklifts, scissor lifts, boom and / or articulating aerial work platforms, street cleaning systems, conveyor belts, and flat handling platforms.

[0035] Optionally, embodiments of the present application can also be applied to energy storage devices, the operating principle of which mainly includes a charging stage, a storage stage, and a discharging stage. Taking a lithium-ion battery as an example, its operating principle is as follows:

[0036] Charging stage: When the battery is being charged, lithium ions move from the positive electrode to the negative electrode and are embedded in the negative electrode material. At the same time, electrons flow through the external circuit, thus generating an electric current. Storage stage: During the charging process, lithium ions are embedded in the negative electrode material, forming a lithium-ion inventory. When energy needs to be released, lithium ions are released from the negative electrode, move through the electrolyte to the positive electrode, and react with the positive electrode material to release electrical energy. Discharging stage: During the discharging process, lithium ions are released from the positive electrode, move to the negative electrode, and react with the negative electrode material to release electrical energy. The energy storage battery realizes the storage and release of energy through these steps and is widely used in various energy storage and management systems.

[0037] Specifically, please refer to Figures 1-5 , Figure 1 which is an exploded schematic diagram of a battery pack provided by an embodiment of the present application, Figure 2 and which is a three-dimensional schematic diagram of a battery pack provided by an embodiment of the present application. The battery pack 10 specifically includes: a bottom plate 101 and an upper cover 102. Among them, the upper cover 102 is arranged on the bottom plate 101 and forms an accommodation space with the bottom plate 101; an isolation baffle 103 is detachably arranged in the accommodation space and is used to isolate the battery module 104 and the acquisition module 105 arranged in the accommodation space.

[0038] Among them, the material of the isolation baffle 103 can be selected from materials with high temperature resistance, corrosion resistance, and impact resistance, such as SGCC steel or aluminum alloy, etc., and its specific thickness range is [2 mm, 4 mm].

[0039] Advantages of the embodiments of the present application:

[0040] In the embodiments of the present application, a detachable isolation baffle 103 is arranged in the accommodation space formed by the bottom plate 101 and the upper cover 102, and the isolation baffle 103 is arranged to isolate the battery module 104 and the acquisition module 105 in the accommodation space, so that there is a physical isolation between the battery module 104 and the acquisition module 105. The isolation baffle 103 can effectively prevent high-temperature electrolyte generated when the battery module 104 undergoes thermal runaway from spraying onto the isolation baffle 103, effectively preventing the thermal runaway of the battery pack 10 from affecting the normal operation of the acquisition module 105, ensuring that the acquisition module 105 can normally acquire relevant parameters of the battery, enabling the battery management system to give a normal warning, thereby providing emergency time for the staff and improving the safety of the battery pack 10. At the same time, the detachable function of the isolation baffle 103 can facilitate the installation and disassembly of the battery pack 10 by the staff in the later stage, and facilitate the management and maintenance of the subsequent battery pack 10.

[0041] In some embodiments of the present application, as Figures 3-4 shown, the upper cover 102 may be provided with a first installation portion 106 for installing and fixing the isolation baffle 103. Among them, the first installation portion 106 is arranged on the side of the upper cover 102 close to the bottom plate 101, and the first installation portion 106 is a slot structure.

[0042] Furthermore, in order to reinforce the isolation baffle 103, the present application may be provided with first fixing portions (not shown in the figure) on both side surfaces of the first installation portion 106, and the first fixing portions are used to fix the isolation baffle 103.

[0043] Specifically, first installation holes are provided on both side surfaces of the first installation portion 106, second installation holes (not shown in the figure) are provided on the isolation baffle 103, and the first fixing portions are used to pass through the first installation holes and the second installation holes to fix the isolation baffle 103. Among them, the first fixing portion may specifically be a bolt structure or a buckle structure.

[0044] Optionally, as Figure 5 shown, a second installation portion 107 for installing and fixing the isolation baffle 103 may also be provided on the bottom plate 101. Among them, the second installation portion 107 is arranged on the side of the bottom plate 101 close to the upper cover 102, and the second installation portion 107 is a slot structure.

[0045] Furthermore, in order to reinforce the isolation baffle 103, the present application may be provided with second fixing portions (not shown in the figure) on both side surfaces of the second installation portion 107, and the second fixing portions are used to fix the isolation baffle 103.

[0046] Specifically, third mounting holes (not shown in the figure) are provided on both side surfaces of the second mounting portion 107, fourth mounting holes are provided on the isolation baffle 103, and the second fixing portion is used to pass through the third mounting holes and the fourth mounting holes to fix the isolation baffle 103. Among them, the second fixing portion may specifically be a bolt structure or a buckle structure.

[0047] Optionally, a first mounting portion 106 for mounting and fixing the isolation baffle 103 and a second mounting portion 107 for mounting and fixing the isolation baffle 103 may be respectively provided on the upper cover 102 and the bottom plate 101 at the same time. Among them, the first mounting portion 106 is provided on the side of the upper cover 102 close to the bottom plate 101, and the first mounting portion 106 is a groove structure. The second mounting portion 107 is provided on the side of the bottom plate 101 close to the upper cover 102, and the second mounting portion 107 is a groove structure.

[0048] Furthermore, in order to reinforce the isolation baffle 103, a first fixing portion may be provided on both side surfaces of the first mounting portion 106, and this first fixing portion is used to fix the isolation baffle 103. At the same time, a second fixing portion is provided on both side surfaces of the second mounting portion 107, and this second fixing portion is used to fix the isolation baffle 103.

[0049] Specifically, first mounting holes are provided on both side surfaces of the first mounting portion 106, second mounting holes are provided on the isolation baffle 103, and the first fixing portion is used to pass through the first mounting holes and the second mounting holes to fix the isolation baffle 103; third mounting holes are provided on both side surfaces of the second mounting portion 107, fourth mounting holes are provided on the isolation baffle 103, and the second fixing portion is used to pass through the third mounting holes and the fourth mounting holes to fix the isolation baffle 103. Among them, the first fixing portion and the second fixing portion may specifically be a bolt structure or a buckle structure.

[0050] Among them, in order to ensure the overall safety property of the battery pack 10, the following materials can be selected for its upper cover 102: SMC composite material: This material has been widely used in the upper cover 102 of the new energy vehicle battery pack 10. The SMC composite material has the advantages of high specific strength, light weight, corrosion resistance and waterproofness, and is suitable as an alternative to traditional metal materials. Aluminum alloy: Although less, there are also some upper covers 102 of the battery pack 10 made of aluminum alloy materials, mainly because of its good thermal conductivity and impact resistance. Steel plate: The steel plate is also used for the upper cover 102 of the battery pack 10 because of its simple manufacturing process, low cost, good thermal conductivity and impact resistance.

[0051] The bottom plate 101 can be made of the following materials: Aluminum alloy: Aluminum alloy is a commonly used material for the bottom plate 101 of the battery pack 10, especially 6061-T6 and 6063-T6 profiles. These materials have high yield strength and tensile strength, high welding strength, and good sealing performance. Composite material: New composite materials are also used for the bottom plate 101 of the battery pack 10 to improve its lightweight and heat insulation performance. Steel plate: Steel plates are also used for the bottom plate 101 of the battery pack 10 due to their high strength and rigidity, but anti-corrosion treatment is required to maintain their performance.

[0052] In some embodiments of the present application, the isolation baffle 103 divides the accommodation space into a first accommodation space and a second accommodation space; the battery module 104 and the acquisition module 105 are respectively arranged in the first accommodation space and the second accommodation space.

[0053] In some embodiments of the present application, the battery pack 10 further includes an acquisition wire harness 108. The acquisition wire harness 108 is respectively connected to the battery module 104 and the acquisition module 105. A hole structure 109 for allowing the acquisition wire harness 108 to pass from the first accommodation space to the second accommodation space is provided on the isolation baffle 103.

[0054] Among them, the position of the hole structure 109 can be set on both the left and right sides with the center line of the battery pack 10 as the boundary, and the up and down position is at one-third of the isolation baffle 103.

[0055] Among them, the shape of the hole structure 109 can include an oval shape. The size of the hole structure 109: the distance range between the upper and lower ends is: [15mm, 20mm], and the distance range between the left and right ends is: [20mm, 50mm].

[0056] Among them, the battery pack 10 further includes module control and battery cells. Among them, the module control can be connected to the acquisition wire harness 108. The module control is the core part of the battery module 104 and is responsible for monitoring and managing the state and performance of the individual batteries.

[0057] The battery cell is the basic energy storage unit of the battery module 104 and is usually composed of lithium-ion battery cells.

[0058] In order to further ensure that the acquisition module 105 can normally acquire relevant information of the battery, a protective layer can be provided on the periphery of the acquisition wire harness 108 in the embodiments of the present application. This protective layer has the functions of heat resistance and corrosion resistance. Specifically, this protective layer can adopt a combined structure of cloth-based tape + PVC tape.

[0059] In some embodiments of the present application, the battery pack 10 further includes a collection harness plug 110. One end of the collection harness 108 is connected to the battery pack 10, the other end of the collection harness 108 is connected to one end of the collection harness plug 110, and the other end of the collection harness plug 110 is connected to the collection module 105.

[0060] In the embodiments of the present application, by providing a collection harness plug 110 between the collection harness 108 and the collection module 105, the convenience of connection and separation between the battery module 104 and the collection module 105 can be effectively improved.

[0061] In some embodiments of the present application, the battery pack 10 includes an opening and closing component (not shown in the figure). The battery pack 10 includes an opening and closing component, and the opening and closing component cooperates with the hole structure 109. The opening and closing component can be used to open before the collection harness 108 passes through the hole structure 109 so that the collection harness 108 can pass through the hole structure 109. After the collection harness 108 passes through the hole structure 109, the opening and closing component can be closed to narrow the range of the hole structure 109 and block the high-temperature electrolyte generated by the thermal runaway of the battery module 104 from passing through the hole structure 109, thereby improving the isolation effect and the safety of the battery pack 10.

[0062] The embodiments of the present application have been introduced in detail above. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A battery pack, characterized in that, Comprising: Bottom plate; Upper cover, disposed on the bottom plate and forming a receiving space with the bottom plate; Isolation baffle, detachably disposed in the receiving space for isolating the battery module and the acquisition module disposed in the receiving space.

2. The battery pack according to claim 1, wherein, The upper cover is provided with a first mounting portion for mounting and fixing the isolation baffle; and / or, The bottom plate is provided with a second mounting portion for mounting and fixing the isolation baffle.

3. The battery pack according to claim 2, wherein The first mounting portion is disposed on a side of the upper cover close to the bottom plate, and the first mounting portion is a slot structure.

4. The battery pack according to claim 2, wherein, Both side surfaces of the first mounting portion are provided with first fixing portions for fixing the isolation baffle.

5. The battery pack according to claim 4, characterized in that, Both side surfaces of the first mounting portion are provided with first mounting holes, and the isolation baffle is provided with second mounting holes. The first fixing portion is used for passing through the first mounting hole and the second mounting hole to fix the isolation baffle.

6. The battery pack according to claim 2, wherein The second mounting portion is disposed on a side of the bottom plate close to the upper cover, and the second mounting portion is a slot structure.

7. The battery pack according to claim 2, characterized in that, Both side surfaces of the second mounting portion are provided with second fixing portions for fixing the isolation baffle.

8. The battery pack according to claim 7, characterized in that, Both side surfaces of the second mounting portion are provided with third mounting holes, and the isolation baffle is provided with fourth mounting holes. The second fixing portion is used for passing through the third mounting hole and the fourth mounting hole to fix the isolation baffle.

9. The battery pack according to any one of claims 1-8, characterized in that, The isolation baffle divides the receiving space into a first receiving space and a second receiving space; The battery module and the acquisition module are respectively disposed in the first receiving space and the second receiving space.

10. The battery pack according to claim 9, characterized in that, The battery pack further includes an acquisition wire harness, the acquisition wire harness is respectively connected to the battery module and the acquisition module, and the isolation baffle is provided with a hole structure for enabling the acquisition wire harness to pass from the first receiving space to the second receiving space.

11. The battery pack according to claim 10, characterized in that, The battery pack includes an opening and closing member, the opening and closing member is disposed on the isolation baffle, and the opening and closing member cooperates with the hole structure.

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