Battery assembly, battery pack and vehicle

Abstract

The utility model relates to the technical field of battery construction, and discloses a battery assembly, a battery pack and a vehicle, the battery assembly comprises a shell part and a pole core part, the shell part comprises a pole core cavity and a liquid storage cavity, the pole core part is arranged in the pole core cavity, and the pole core cavity is suitable for storing electrolyte; the liquid storage cavity is used for storing an electrolyte, the liquid storage cavity is provided with a liquid seepage part, and the liquid storage cavity can supplement the electrolyte into the pole core cavity through the liquid seepage part; the utility model provides a battery assembly, a battery pack and a vehicle, and can solve the problem that the battery performance and the service life are affected due to non-uniform distribution of an electrolyte in the battery assembly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery structure, in particular to a battery assembly, a battery pack and a vehicle. BACKGROUND

[0002] With the rapid development of battery technology, the energy density, safety and service life of the battery have become important factors; in the production and use of the battery, the management and storage of the electrolyte are particularly important.

[0003] In the related art, the pole core in the battery is soaked in the electrolyte, and in the continuous charging and discharging process of the battery, the electrolyte in the battery is consumed and reduced, and the soaking level of the electrolyte to the pole core is too low, which leads to uneven distribution of the electrolyte in the pole core, thereby seriously affecting the performance and service life of the battery. UTILITARIAN CONTENT

[0004] Therefore, the present application provides a battery assembly, a battery pack and a vehicle to solve the problem of uneven distribution of electrolyte in the battery assembly, which affects the performance and service life of the battery.

[0005] In a first aspect, the present application provides a battery assembly, comprising a shell component and a pole core component, the shell component comprising a pole core cavity and a liquid storage cavity, the pole core cavity being internally provided with the pole core component and being adapted to store electrolyte; the liquid storage cavity is used to store electrolyte, and the liquid storage cavity is provided with a liquid permeation part, and the liquid storage cavity can supplement electrolyte into the pole core cavity through the liquid permeation part.

[0006] Beneficial effects: by setting the liquid storage cavity in the shell component and communicating with the pole core cavity through the liquid permeation part, in the continuous charging and discharging process of the battery assembly, the electrolyte in the pole core cavity is consumed and reduced, the electrolyte in the liquid storage cavity can enter the pole core cavity through the liquid permeation part, to ensure the height of the electrolyte in the pole core cavity, to ensure the soaking effect of the pole core component in the pole core cavity, so that the electrolyte can be evenly distributed in the pole core component, to improve the performance of the battery and prolong the service life of the battery.

[0007] In an optional embodiment, along the height direction of the shell component, the lowest part of the liquid permeation part is not lower than the top of the pole core component.

[0008] Beneficial effects: The liquid storage cavity is arranged inside the shell part, the liquid storage cavity is communicated with the core cavity through the liquid permeation part, and the lowest position of the bottom of the liquid permeation part is not lower than the top of the core part in the core cavity in the height direction of the core cavity. Therefore, the electrolyte stored in the liquid storage cavity can enter the core cavity through the liquid permeation part under the action of its own gravity, so as to supplement the electrolyte for the core cavity, and the height of the electrolyte in the core cavity can always soak the core part, so that the electrolyte can be uniformly distributed in the core part, the performance of the battery is improved, and the service life of the battery is prolonged.

[0009] At the same time, at least part of the gas generated in the process of continuous charging and discharging of the battery can enter the liquid storage cavity through the liquid permeation part and gather at the top of the liquid storage cavity, which is isolated from the core part, so as to reduce the chemical corrosion of the core part, further improve the performance of the battery, and prolong the service life of the battery.

[0010] In an alternative embodiment, the liquid storage cavity is located at the inner top of the core cavity, and the liquid permeation part is arranged at the bottom of the liquid storage cavity.

[0011] Beneficial effects: The liquid storage cavity is located at the inner top of the core cavity, and the liquid permeation part is arranged on the bottom plate of the liquid storage cavity, so that the core cavity can be basically filled with electrolyte, the uniform distribution of electrolyte on the core part is ensured, the performance of the battery assembly is ensured, and the service life of the battery assembly is prolonged; and the gas generated in the core cavity can all enter the liquid storage cavity for isolation, so as to further reduce the chemical corrosion of the core part, further improve the performance of the battery, and prolong the service life of the battery.

[0012] At the same time, the liquid permeation part can reduce the backflow of the electrolyte in the core cavity to the liquid storage cavity due to shaking, so as to improve the soaking effect of the electrolyte in the core cavity on the core part.

[0013] In an alternative embodiment, the liquid storage cavity comprises a bottom plate, a side plate and a partition plate, the bottom plate extends along the length of the shell part, the bottom plate is provided with the liquid permeation part; the side plate is arranged around the periphery of the bottom plate; the partition plate is arranged in multiple, and multiple partition plates are arranged in the side plate and are arranged at intervals along the extension direction of the bottom plate.

[0014] Beneficial effects: By arranging multiple partition plates at intervals in the liquid storage cavity, the deformation resistance of the liquid storage cavity can be enhanced, and the electrolyte in the liquid storage cavity can be separated, so as to ensure the uniformity of the distribution of the electrolyte in the liquid storage cavity, ensure the timeliness and uniformity of the liquid supplement.

[0015] In an alternative embodiment, the side plate is connected with the inner top surface of the core cavity, and the partition plate is arranged at intervals with the inner top surface of the core cavity.

[0016] Beneficial effects: the side plate is connected with the inner top surface of the pole core cavity, so that the liquid storage cavity does not need to be provided with a top plate, directly uses the inner top surface of the pole core cavity as the top surface, and the structure of the liquid storage cavity is simplified.

[0017] In an alternative embodiment, the bottom plate is provided with a plurality of liquid permeable holes, and a diaphragm layer is arranged on the bottom plate, the diaphragm layer has a microporous structure for electrolyte to permeate, and the liquid permeable holes and the diaphragm layer form the liquid permeation part.

[0018] Beneficial effects: the diaphragm layer is arranged on the bottom plate, the diaphragm layer has good permeability to ensure that the electrolyte can enter the pole core cavity, the microporous structure of the diaphragm layer can effectively block the shaking electrolyte and prevent backflow, and the diaphragm layer can facilitate gas to enter the liquid storage cavity.

[0019] In an alternative embodiment, the size of the liquid storage cavity along the length direction of the pole core cavity is 60% to 100% of the length of the pole core cavity; and / or, the size of the liquid storage cavity along the width direction of the pole core cavity is 60% to 100% of the width of the pole core cavity.

[0020] Beneficial effects: the size of the liquid storage cavity along the length direction of the pole core cavity is 60% to 100% of the length of the pole core cavity; and / or, the size of the liquid storage cavity along the width direction of the pole core cavity is 60% to 100% of the width of the pole core cavity, which can timely supplement the electrolyte to each part of the pole core cavity along the length direction and the width direction, avoid affecting the timely supplement of the electrolyte to each part of the pole core cavity due to the inclination of the battery assembly or the blockage of the gas in the pole core cavity, thereby ensuring the performance of the battery assembly and prolonging the service life of the battery assembly.

[0021] In an alternative embodiment, the shell part is provided with a liquid injection port, the liquid injection port communicates with the liquid storage cavity; and / or, a liquid level sensor is arranged in the liquid storage cavity.

[0022] Beneficial effects: the arrangement of the liquid level sensor can facilitate the monitoring of the storage amount of the electrolyte in the battery assembly, prevent the lack of electrolyte from affecting the performance of the battery, and the arrangement of the liquid injection port can facilitate the liquid supplement.

[0023] In an alternative embodiment, the shell part is provided with an explosion-proof valve, the explosion-proof valve communicates with the liquid storage cavity; and / or, the shell part comprises a shell body, a positive electrode end cover and a negative electrode end cover, the shell body is provided with openings at both ends along the length direction, and the positive electrode end cover and the negative electrode end cover respectively close the two openings of the shell body.

[0024] Beneficial effects: the arrangement of the explosion-proof valve can provide a safe channel for releasing pressure when the internal pressure of the battery assembly abnormally rises, thereby preventing the battery from being broken or exploded due to excessive internal pressure.

[0025] Secondly, this application also provides a battery pack including the battery components described in any of the embodiments of the first aspect.

[0026] Beneficial effects: Since the battery pack includes battery components, it has the same effects as the battery components, which will not be elaborated here.

[0027] Thirdly, this application also provides a vehicle including the battery pack described in the second aspect, and / or the battery assembly described in any embodiment of the first aspect.

[0028] Beneficial effects: Since the vehicle includes a battery pack and / or battery assembly, which has the same effects as the battery assembly, they will not be elaborated here. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this application, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of a battery assembly with half of its casing removed, according to an embodiment of this application.

[0031] Figure 2 for Figure 1 Exploded view;

[0032] Figure 3 This is a schematic diagram of another battery assembly according to an embodiment of this application;

[0033] Figure 4 This is a top view of a battery assembly according to an embodiment of this application;

[0034] Figure 5 for Figure 3 Cross-sectional view at point AA;

[0035] Figure 6 for Figure 4 A magnified view of a section at point B.

[0036] Explanation of reference numerals in the attached figures:

[0037] 100. Housing components; 200. Polar core components;

[0038] 1. Core cavity; 2. Liquid storage cavity; 3. Injection port; 4. Explosion-proof valve; 5. Housing body; 6. Positive end cap; 7. Negative end cap;

[0039] 201, liquid permeation part; 202, bottom plate; 203, side plate; 204, partition plate;

[0040] 2021, liquid permeation hole; 2022, diaphragm layer. DETAILED DESCRIPTION

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0042] In the related art, with the rapid development of battery technology, the energy density, safety, and service life of the battery have become important factors; in the production and use of the battery, the management and storage of the electrolyte are particularly important; the pole core in the battery is soaked in the electrolyte, and in the continuous charging and discharging process of the battery, the electrolyte in the battery is consumed and reduced, and the immersion level of the electrolyte to the pole core is too low, which leads to uneven distribution of the electrolyte in the pole core, thereby seriously affecting the performance and service life of the battery.

[0043] To solve the above technical problems, the present application provides a battery assembly, a battery pack, and a vehicle to solve the problem of uneven distribution of electrolyte in the battery assembly, affecting the performance and service life of the battery.

[0044] The embodiments of the present application will be described below in combination with Figures 1 to 6 .

[0045] According to the embodiments of the present application, in a first aspect, a battery assembly is provided, as shown in Figures 1 to 5 , which includes a shell part 100 and a pole core part 200. Figure 3 Specifically, the material of the shell part 100 can be aluminum alloy or steel, etc.; the shell part 100 includes a pole core cavity 1 and a liquid storage cavity 2; the form of the pole core part 200 can be a laminated type, a wound type, and a rod type, etc.; the pole core part 200 is arranged inside the pole core cavity 1 and is adapted to store electrolyte; the liquid storage cavity 2 is used to store electrolyte, and the liquid storage cavity 2 is provided with a liquid permeation part 201, and the liquid storage cavity 2 can supplement electrolyte into the pole core cavity 1 through the liquid permeation part 201.

[0046] Specifically, as shown in Figure 1As shown, the shell component 100 includes a shell body 5, a positive electrode end cover 6 and a negative electrode end cover 7, the shell body 5 is provided with two openings at both ends along the length direction, and the positive electrode end cover 6 and the negative electrode end cover 7 respectively close the two openings of the shell body 5; that is, the positive electrode and the negative electrode of the battery assembly are respectively arranged at both ends of the shell component 100 along the length direction, so as to reduce the space occupied by the movement core in the height direction of the battery assembly, and improve the power density of the battery.

[0047] More specifically, the material of the liquid storage cavity 2 can be PP, PC, etc., and the liquid storage cavity 2 can be adhered inside the shell component 100; or it can be separately arranged outside the pole core cavity 1; as long as the position of the liquid storage cavity 2 can supplement the liquid for the pole core cavity 1.

[0048] It needs to be explained that the liquid permeation part 201 refers to a hole structure that can allow electrolyte to pass through, and the hole diameter can be micron level or not, which can be selected and adjusted according to actual needs; specific examples include through holes, one-way membrane, etc.

[0049] In this embodiment, as shown in Figures 1 to 2 By arranging the liquid storage cavity 2 in the shell component 100 and communicating with the pole core cavity 1 through the liquid permeation part 201, during the continuous charging and discharging process of the battery assembly, the electrolyte in the pole core cavity 1 is consumed and reduced, and the electrolyte in the liquid storage cavity 2 can enter the pole core cavity 1 through the liquid permeation part 201, so as to ensure the height of the electrolyte in the pole core cavity 1, and ensure the soaking effect of the pole core component 200 in the pole core cavity 1, so that the electrolyte can be uniformly distributed in the pole core component 200, improve the performance of the battery, and prolong the service life of the battery.

[0050] In one embodiment, as shown in Figure 1 Along the height direction of the shell component 100, the lowest part of the bottom of the liquid permeation part 201 is not lower than the top of the pole core component 200, so that the electrolyte in the liquid storage cavity 2 can enter the pole core cavity 1 through the liquid permeation part 201 under the action of its own gravity.

[0051] It is worth noting that in the above "the lowest part of the bottom of the liquid permeation part 201 is not lower than the top of the pole core component 200", since the liquid permeation part 201 can be planar, curved or any other shape, as long as the lowest part of the bottom of the liquid permeation part 201 is higher than the top of the pole core component 200 in the pole core cavity 1, the height of the electrolyte in the pole core cavity 1 can be ensured to be not lower than the pole core component 200, so that the pole core component 200 can always be kept in the electrolyte.

[0052] It needs to be explained that the height direction of the shell component 100 is the same as the direction of gravity.

[0053] In the specific use process, as shown in Figure 1As shown, in the process of continuous charging and discharging of the battery assembly, a certain amount of gas is generated in the decomposition process of the electrolyte, and a part of the gas can enter the liquid storage cavity 2 through the liquid permeation part 201 to be stored to realize isolation from the movement part, thereby improving the safety of the battery assembly; at the same time, the electrolyte in the liquid storage cavity 2 can enter the core cavity 1 to supplement the liquid under the action of gravity, and can ensure that the electrolyte in the core cavity 1 completely soaks the core part 200.

[0054] In this embodiment, as shown in Figures 1 to 2 , a liquid storage cavity 2 is arranged inside the shell part 100, the liquid storage cavity 2 is communicated with the core cavity 1 through the liquid permeation part 201, and the lowest part of the bottom of the liquid permeation part 201 is not lower than the top of the core part 200 in the core cavity 1 along the height direction of the core cavity 1, so that the electrolyte stored in the liquid storage cavity 2 can enter the core cavity 1 through the liquid permeation part 201 under the action of its own gravity to supplement the electrolyte in the core cavity 1, so that the height of the electrolyte in the core cavity 1 can always soak the core part 200, thereby making the electrolyte be uniformly distributed in the core part 200, improving the performance of the battery, and prolonging the service life of the battery.

[0055] At the same time, at least a part of the gas generated in the process of continuous charging and discharging of the battery assembly can enter the liquid storage cavity 2 through the liquid permeation part 201, and gather at the top of the liquid storage cavity 2 to isolate the core part 200, thereby reducing the chemical corrosion of the core part 200, further improving the performance of the battery assembly, and prolonging the service life of the battery assembly.

[0056] In some other embodiments, as shown in Figure 3 , the liquid storage cavity 2 can be located on one side of the core cavity 1, the liquid permeation part 201 can be arranged on the side wall of the liquid storage cavity 2 and communicated with the core cavity 1, and the lowest part of the bottom of the liquid permeation part 201 is not lower than the top of the core part 200 in the core cavity 1, so that the core part 200 in the core cavity 1 can be soaked by supplementing the electrolyte in the core cavity 1 through the liquid permeation part 201; of course, the height of the bottom of the liquid storage cavity 2 can be set according to actual conditions.

[0057] In one embodiment, as shown in Figure 1 , Figure 2 and Figure 5 , the liquid storage cavity 2 is located at the inner top of the core cavity 1, and the liquid permeation part 201 is arranged at the bottom of the liquid storage cavity 2. Specifically, the liquid storage cavity 2 can be located directly above the core part 200 in the core cavity 1, or can be located on the side of the core part 200 in the core cavity 1, which can be selected and set according to actual conditions. Of course, the preferred scheme is that the liquid storage cavity 2 is located directly above the core part 200 in the core cavity 1.

[0058] In this embodiment, the liquid storage cavity 2 is located at the inner top of the pole core cavity 1, and the liquid permeation part 201 is arranged at the bottom of the liquid storage cavity 2, so that the pole core cavity 1 can be substantially filled with electrolyte (except for the part around the liquid storage cavity 2), ensuring the uniform distribution of electrolyte on the pole core part 200, guaranteeing the performance of the battery assembly, and prolonging the service life of the battery assembly; and the gas generated in the pole core cavity 1 can all enter the liquid storage cavity 2 for isolation, thereby further reducing its chemical corrosion on the pole core part 200, further improving the performance of the battery, and prolonging the service life of the battery; at the same time, the liquid permeation part 201 can reduce the backflow of electrolyte in the pole core cavity 1 to the liquid storage cavity 2 due to shaking, thereby improving the soaking effect of the electrolyte in the pole core cavity 1 on the pole core part 200.

[0059] In a specific embodiment, as shown in Figures 1 to 2 , the size of the liquid storage cavity 2 along the length direction of the pole core cavity 1 is 60% to 100% of the length of the pole core cavity 1, that is, the liquid permeation part 201 extends along the length direction of the pole core cavity 1, wherein the length direction, width direction and height direction of the pole core cavity 1 are shown in Figure 1 , preferably, the size of the liquid storage cavity 2 along the length direction of the pole core cavity 1 is any one of 60%, 70%, 80%, 90% and 100% of the length of the pole core cavity 1, which can be selected and set according to actual conditions.

[0060] The size of the liquid storage cavity 2 along the width direction of the pole core cavity 1 is 60% to 100% of the width of the pole core cavity 1, that is, the liquid permeation part 201 extends along the width direction of the pole core cavity 1, preferably, the size of the liquid storage cavity 2 along the width direction of the pole core cavity 1 is any one of 60%, 70%, 80%, 90% and 100% of the width of the pole core cavity 1, which can be selected and set according to actual conditions.

[0061] In this embodiment, the liquid permeation part 201 extends along the length direction of the pole core cavity 1, which can supplement electrolyte in the pole core cavity 1 at any time along the length direction and the width direction of the pole core cavity 1, avoiding the influence of the inclination of the battery assembly or the blockage of gas in the pole core cavity 1 on the timely supplement of electrolyte in the pole core cavity 1, thereby guaranteeing the performance of the battery assembly and prolonging the service life of the battery assembly.

[0062] In an embodiment, as shown in Figure 1 and Figure 2As shown, the liquid storage cavity 2 includes a bottom plate 202, a side plate 203 and a partition plate 204; the bottom plate 202 extends along the length of the shell part 100, and the bottom plate 202 is provided with a liquid permeation part 201; the side plate 203 is arranged around the periphery of the bottom plate 202, specifically, the side plate 203 is annular, and the bottom edge thereof is sealingly connected to the edge of the bottom plate 202 by means of integral molding or welding; the partition plate 204 is provided in plurality, and the plurality of partition plates 204 are arranged in the side plate 203 and are arranged at intervals along the extension direction of the bottom plate 202.

[0063] It should be noted that the partition plate 204 and the bottom plate 202 can be arranged at intervals or connected.

[0064] Specifically, the distance between any adjacent partition plates 204 is 20mm to 50mm, specifically any one of 20mm, 25mm, 30mm, 35mm, 40mm, 45mm and 50mm, or other values.

[0065] In this embodiment, as shown in Figure 1 and Figure 2 By arranging the plurality of partition plates 204 at intervals in the liquid storage cavity 2, the anti-deformation capability of the liquid storage cavity 2 can be enhanced, and the electrolyte in the liquid storage cavity 2 can be separated, so as to ensure the uniformity of the distribution of the electrolyte in the liquid storage cavity 2, and ensure the timeliness and uniformity of the liquid supplement.

[0066] In one embodiment, the side plate 203 is connected to the inner top surface of the pole core cavity 1 by means of glue bonding, the partition plate 204 is arranged at intervals with the inner top surface of the pole core cavity 1, and the plurality of partition plates 204 are arranged at intervals with the inner top surface of the pole core cavity 1; typically, the height of the partition plate 204 is 3mm to 10mm, specifically any one of 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm and 10mm.

[0067] In this example, the side plate 203 is connected to the inner top surface of the pole core cavity 1, so that the liquid storage cavity 2 does not need to be provided with a top plate, and directly uses the inner top surface of the pole core cavity 1 as the top surface thereof, thereby simplifying the structure of the liquid storage cavity 2.

[0068] In one embodiment, as shown in Figure 2 and Figure 6 The bottom plate 202 is provided with a plurality of liquid permeation holes 2021, and the bottom plate 202 is provided with a diaphragm layer 2022, the diaphragm layer 2022 has a microporous structure for the electrolyte to permeate, and the liquid permeation holes 2021 and the diaphragm layer 2022 form the liquid permeation part 201.

[0069] It should be noted that the diaphragm layer 2022 can be arranged on the surface of the bottom plate 202 located in the liquid storage cavity 2 by means of glue bonding, or can be arranged on the surface of the bottom plate 202 located outside the liquid storage cavity 2 by means of glue bonding, as shown inFigure 2 As shown.

[0070] Specifically, the height of the liquid storage cavity 2 is 0-5mm, the length is 50mm-600mm, and the width is 5mm-30mm; the thickness of the diaphragm layer 2022 is 0.1mm-2mm, the length is 50mm-600mm, and the width is 5mm-30mm.

[0071] The diaphragm layer 2022 is a high polymer diaphragm, and the material can be PP, PE, etc. The electrolyte can penetrate into the pole core cavity 1 through the diaphragm layer 2022 under the action of its own gravity.

[0072] In this embodiment, the diaphragm layer 2022 is arranged on the bottom plate 202, and the diaphragm layer 2022 has good permeability to ensure that the electrolyte can enter the pole core cavity 1, and the microporous structure of the diaphragm layer 2022 can effectively block the shaking electrolyte to prevent backflow.

[0073] In one embodiment, as shown in the accompanying drawings, the shell part 100 is provided with a liquid injection port 3, and the liquid injection port 3 is in communication with the liquid outlet cavity; it can be convenient to supplement the liquid in the liquid storage cavity 2, and improve the service life of the battery assembly. Figure 1 At the same time, the liquid level sensor is arranged in the liquid storage cavity 2; in this embodiment, the arrangement of the liquid level sensor can facilitate the monitoring of the storage amount of the electrolyte in the battery assembly, prevent the lack of electrolyte, and affect the performance of the battery.

[0074] In one embodiment, as shown in the accompanying drawings,

[0075] , Figure 1 , Figure 2 and Figure 4 , the shell part 100 is provided with an explosion-proof valve 4, and the explosion-proof valve 4 is in communication with the liquid storage cavity 2. The specific type of the explosion-proof valve 4 can be selected and adjusted according to actual needs; in this embodiment, the arrangement of the explosion-proof valve 4 can provide a safety channel for releasing pressure when the internal pressure of the battery assembly abnormally rises, to prevent the battery from being broken or exploded due to excessive internal pressure.

[0076] In a second aspect, the application also provides a battery pack comprising a plurality of battery assemblies in any one of the embodiments of the first aspect.

[0077] Specifically, the plurality of battery assemblies are connected by a circuit in series and / or parallel in the battery pack to form a power supply unit in the battery pack. Of course, when the battery pack is installed, the height direction of the battery assembly should be consistent with the direction of gravity.

[0078] In this embodiment, because the battery pack includes the battery assembly, it has the same effect as the battery assembly, which will not be described here.

[0079] According to the embodiments of the present application, in a third aspect, a vehicle is provided, comprising the battery pack in the second aspect, and / or the battery assembly in any one of the embodiments of the first aspect.

[0080] It should be noted that the battery assembly can supply power for the start of the engine as a separate power supply unit, or can supply power for the driving motor of the automobile as part of the battery pack.

[0081] Specifically, the vehicle can be a SUV, a sedan, an MPV, etc.

[0082] In this embodiment, because the vehicle comprises the battery pack and / or the battery assembly, it has the same effect as the battery assembly, which will not be described here.

[0083] Although the embodiments of the present application are described in conjunction with the accompanying drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.

Claims

1. A battery assembly, comprising: The battery assembly comprises a shell component (100) and a pole core component (200), the shell component (100) comprises: a pole core cavity (1) in which the pole core component (200) is arranged and which is adapted to store electrolyte; and a liquid storage cavity (2) for storing electrolyte, the liquid storage cavity (2) is provided with a liquid permeation part (201) which is in communication with the pole core cavity (1), and the liquid storage cavity (2) is capable of supplementing electrolyte into the pole core cavity (1) through the liquid permeation part (201).

2. The battery assembly of claim 1, wherein, The lowest part of the liquid permeation part (201) is not lower than the top of the pole core component (200) along the height direction of the shell component (100).

3. The battery assembly of claim 1, wherein, The liquid storage cavity (2) is located at the inner top of the pole core cavity (1), and the liquid permeation part (201) is arranged at the bottom of the liquid storage cavity (2).

4. The battery assembly of claim 3, wherein, The liquid storage cavity (2) comprises: a bottom plate (202) extending along the length of the shell component (100), the bottom plate (202) is provided with the liquid permeation part (201); a side plate (203) arranged around the periphery of the bottom plate (202); a plurality of partition plates (204) arranged in the side plate (203) and spaced apart along the extension direction of the bottom plate (202).

5. The battery assembly of claim 4, wherein, The side plate (203) is connected to the inner top surface of the pole core cavity (1), and the partition plates (204) are spaced apart from the inner top surface of the pole core cavity (1).

6. The battery assembly of claim 4, wherein, The bottom plate (202) is provided with a plurality of liquid permeation holes (2021), and a diaphragm layer (2022) is arranged on the bottom plate (202), the diaphragm layer (2022) has a microporous structure for electrolyte to permeate, and the liquid permeation holes (2021) and the diaphragm layer (2022) form the liquid permeation part (201).

7. The battery assembly of any one of claims 1-6, wherein, The shell component (100) is provided with a liquid injection port (3) which is in communication with the liquid storage cavity (2); and / or, a liquid level sensor is arranged in the liquid storage cavity (2).

8. The battery assembly of any one of claims 1-6, wherein, The shell component (100) is provided with an explosion-proof valve (4) which is in communication with the liquid storage cavity (2); and / or, the shell component (100) comprises a shell body (5), a positive electrode end cover (6) and a negative electrode end cover (7), the shell body (5) is provided with openings at both ends along the length direction thereof, and the positive electrode end cover (6) and the negative electrode end cover (7) respectively close the two openings of the shell body (5).

9. A battery pack, characterized by, The battery assembly comprises a plurality of battery assemblies as claimed in any one of claims 1-8.

10. A vehicle characterized by comprising: The battery pack comprises the battery pack as claimed in claim 9, and / or the battery assembly as claimed in any one of claims 1-8.

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