Battery pack and vehicle

Abstract

The utility model relates to a battery pack and a vehicle, the battery pack comprises a box body, a liquid cooling component, a liquid leakage valve and an isolation part, the box body is internally provided with a containing space, the liquid cooling component is provided with a connecting joint, at least part of the connecting joint is located in the containing space, the liquid leakage valve is connected to the box body, and the isolation part is located in the containing space. The liquid leakage valve is communicated with the containing space, the isolation part is connected to the containing space and can isolate a flow guide channel, the flow guide channel is communicated with the liquid leakage valve and the connector located in the containing space, and the flow guide channel is used for flowing of leaked liquid. According to the battery pack, through the arrangement of the isolation part, the isolation effect and the flow guide channel can be generated, and under the flow guide effect of the flow guide channel, leaked liquid can flow to the liquid leakage valve and can flow out through the liquid leakage valve, so that short circuit, sparking, insulation failure and hydrogen explosion reaction of the battery pack are avoided, and the safety performance of the battery pack is ensured.

Description

TECHNICAL FIELD

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

[0002] When the liquid cooling component of the battery pack in the related art leaks, it is easy to spread to the battery cell or other high-voltage connecting parts, which may cause short circuit, sparking, insulation failure and hydrogen explosion reaction, thereby affecting the safety performance of the battery pack. CONTENT OF THE UTILITY MODEL

[0003] The purpose of the present disclosure is to provide a battery pack and a vehicle to solve the above-mentioned problems in the related art.

[0004] In order to achieve the above-mentioned purpose, one aspect of the present disclosure provides a battery pack, comprising:

[0005] a box body, the box body having an accommodation space inside;

[0006] a liquid cooling component, the liquid cooling component having a connecting joint, at least part of the connecting joint being located in the accommodation space;

[0007] a liquid leakage valve connected to the box body, the liquid leakage valve being in communication with the accommodation space;

[0008] an isolation part connected to the accommodation space, the isolation part being capable of isolating a flow channel, the flow channel being in communication with the liquid leakage valve and the connecting joint located in the accommodation space, and the flow channel being used for flowing of the leaked liquid.

[0009] Optionally, the isolation part comprises a spacer and a filling material, the spacer being connected in the accommodation space, the spacer being used for spacing a filling space, and the filling material being filled in the filling space.

[0010] Optionally, the battery pack further comprises a battery cell assembly, the battery cell assembly being connected in the accommodation space.

[0011] The spacer comprises a first spacer and a second spacer, the first spacer being spaced apart from the side wall of the accommodation space to space a first filling space, the second spacer being spaced apart from the battery cell assembly to space a second filling space, and the first filling space and the second filling space being filled with the filling material.

[0012] Optionally, the battery pack further comprises a battery cell assembly, the battery cell assembly being connected in the accommodation space.

[0013] The spacer is arranged between the side wall of the accommodating space and the battery cell assembly, and is spaced apart from the side wall of the accommodating space and the battery cell assembly respectively to form a first filling space and a second filling space, both of which are filled with the filling material.

[0014] Optionally, the spacer has a plurality of intercommunicating gaps or reserved channels, which are in communication with the flow guide channel.

[0015] Optionally, the filling material is arranged as potting glue.

[0016] Optionally, the spacer is configured as a plate body made of plastic or metal.

[0017] The spacer is configured as a foam material.

[0018] Optionally, the flow guide channel is configured as a pipeline, two ends of which are in communication with the liquid leakage valve and the connecting joint located in the accommodating space respectively.

[0019] Optionally, the insulation part is provided with a reinforcing rib arranged along the transverse direction of the box, and the reinforcing rib is close to the flow guide channel.

[0020] Optionally, the liquid cooling component includes a liquid cooling plate located in the accommodating space and a liquid cooling pipe, one end of which extends into the accommodating space and is connected with the liquid cooling plate, and the connecting joint is arranged at the connection between the liquid cooling pipe and the liquid cooling plate.

[0021] The second aspect of the present disclosure also provides a vehicle comprising the above battery pack.

[0022] The above technical solution can produce an insulation effect by arranging the insulation part, can partially insulate the accommodating space, produce a flow guide channel, and the flow guide channel is a separate channel that can be used for the flow of leaked liquid. The flow guide channel is not in communication with the battery cell assembly and the high-voltage connecting piece, that is, the battery cell assembly and the high-voltage connecting piece are not in the flow guide channel. The leaked liquid flows in the flow guide channel and does not come into contact with the battery cell assembly and the high-voltage connecting piece, so that an insulation effect can be produced. Moreover, under the flow guide effect of the flow guide channel, the leaked liquid can flow to the liquid leakage valve and flow out through the liquid leakage valve, thereby avoiding short circuit, sparking, insulation failure and hydrogen explosion reaction of the battery pack, and ensuring the safety performance of the battery pack.

[0023] Other features and advantages of the present disclosure will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings, which are included to provide a further understanding of the disclosure and constitute a part of this specification, illustrate embodiments of the disclosure and together with the detailed description below help explain the disclosure. In the drawings:

[0025] Figure 1 is a perspective view of a battery pack according to an embodiment of the present disclosure.

[0026] Figure 2 is a structural view of a battery pack according to an embodiment of the present disclosure.

[0027] Figure 3 is a structural view of an insulation portion according to a first embodiment of the present disclosure.

[0028] Figure 4 is a structural view of an insulation portion according to a second embodiment of the present disclosure.

[0029] Figure 5 is a structural view of an insulation portion according to a third embodiment of the present disclosure.

[0030] Figure 6 is a structural view of a flow guide passage according to an embodiment of the present disclosure.

[0031] Figure 7 is a structural view of a position of a reinforcing rib according to an embodiment of the present disclosure.

[0032] Explanation of Reference Signs

[0033] 1, case, 11, tray, 12, accommodation space

[0034] 2, liquid cooling component, 21, liquid cooling pipe, 22, liquid cooling plate

[0035] 3, liquid leakage valve

[0036] 4, insulation portion, 41, spacer, 411, first spacer, 412, second spacer, 42, filler material, 431, first filling space, 432, second filling space, 44, reserved passage

[0037] 5, flow guide passage, 51, pipe

[0038] 6, cell assembly

[0039] 7, reinforcing rib DETAILED DESCRIPTION

[0040] The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0041] In this disclosure, unless otherwise stated, "inner" and "outer" refer to the inner and outer parts of the relevant components. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0042] In the description of this disclosure, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can be a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0043] With the development of new energy technologies, battery packs are being used more and more widely. Battery packs generate heat during use or charging, and heat dissipation is necessary to ensure their normal operation. Currently, liquid cooling components are mainly used to dissipate heat from battery packs. However, as the service life of liquid cooling components increases, problems such as leakage are prone to occur at the connection points.

[0044] When the liquid cooling components of the battery pack in the relevant technology leak, the leakage can easily spread to the battery cells or other high-voltage connectors, causing short circuits, sparking, insulation failure, and hydrogen explosion reactions, thus affecting the safety performance of the battery pack.

[0045] Therefore, such as Figures 1-7 As shown, one aspect of this disclosure provides a battery pack, including a housing 1, a liquid cooling component 2, a leakage valve 3, and an isolation part 4.

[0046] The housing 1 has a receiving space 12. The liquid cooling component 2 has a connecting joint, at least part of which is located in the receiving space 12. The leakage valve 3 is connected to the housing 1 and communicates with the receiving space 12. The isolation part 4 is connected to the receiving space 12 and can isolate the flow channel 5. The flow channel 5 communicates with the leakage valve 3 and the connecting joint located in the receiving space 12. The flow channel 5 is used to allow the leakage liquid to flow.

[0047] The accommodating space 12 can be used to accommodate the battery cell assembly 6 and related components, including high-voltage connectors. The connection joint of the liquid cooling component 2 is the structure for connecting different components of the liquid cooling component 2. The drain valve 3 can drain liquid; when leakage occurs, the leaked liquid can be discharged through the drain valve 3.

[0048] In the technical solution, the isolation part 4 can generate an isolation effect, and can partially isolate the containing space 12 to generate the flow guide channel 5. The flow guide channel 5 is a separate channel, and can be used for the flow of the leaked liquid. The flow guide channel 5 is not connected with the battery cell assembly 6 and the high-voltage connector. That is, the battery cell assembly 6 and the high-voltage connector are not in the flow guide channel 5. The leaked liquid flows in the flow guide channel 5 and does not contact the battery cell assembly 6 and the high-voltage connector, so that the isolation effect can be generated. Moreover, under the flow guide effect of the flow guide channel 5, the leaked liquid can flow to the liquid leakage valve 3 and flow out through the liquid leakage valve 3, so that the short circuit, sparking, insulation failure and hydrogen explosion reaction of the battery pack can be avoided, and the safety performance of the battery pack can be ensured.

[0049] To further improve the isolation sealing performance, in an embodiment of the present disclosure, the isolation part 4 comprises a spacer 41 and a filling material 42. The spacer 41 is connected in the containing space 12, and is used to separate a filling space. The filling material 42 is filled in the filling space. The filling material 42 can improve the isolation sealing performance and avoid liquid penetration, so as to further ensure the safety performance of the battery pack.

[0050] The spacer 41 is arranged in the containing space 12 and can be connected with the inner wall of the box body 1. The spacer 41 separates the containing space 12, facilitates the filling of the filling material 42, avoids the scattering of the filling material 42 during the filling operation, and enables the filling material 42 to be tightly filled and formed, so as to generate the sealing performance and avoid liquid penetration. In some examples, the filling material 42 can be close to the battery cell assembly 6 or the high-voltage connector. That is, the spacer 41 is arranged to be spaced apart from the battery cell assembly 6 or the high-voltage connector, and forms a filling space with the battery cell assembly 6 or the high-voltage connector. The filled filling material 42 can contact the battery cell assembly 6 or the high-voltage connector to generate the sealing performance. In other examples, the spacer 41 can be close to the battery cell assembly 6 or the high-voltage connector. That is, the spacer 41 contacts the battery cell assembly 6 or the high-voltage connector, and forms a filling space between the spacer 41 and the flow guide channel 5. The filled filling material 42 can fill and seal between the flow guide channel 5 and the spacer 41 to generate the sealing performance.

[0051] Optionally, in an embodiment of the present disclosure, the battery pack further comprises a battery cell assembly 6 connected in the containing space 12.

[0052] The spacer 41 comprises a first spacer 411 and a second spacer 412. The first spacer 411 is arranged to be spaced apart from the side wall of the containing space 12 to separate a first filling space 1. The second spacer 412 is arranged to be spaced apart from the battery cell assembly 6 to separate a second filling space 2. The first filling space 1 and the second filling space 2 are both filled with the filling material 42.

[0053] The high-pressure connector can be located on the side wall of the accommodation space 12, and the filling material 42 filled through the first spacer 411 and the first filling space 1 can insulate the high-pressure connector located on the side wall of the accommodation space 12, so as to avoid the contact of the leaked liquid with the high-pressure connector. The battery cell assembly 6 is insulated by the filling material 42 filled through the second spacer 412 and the second filling space 2, so as to avoid the contact of the battery cell assembly 6 with the leaked liquid. The high-pressure connector and the battery cell assembly 6 arranged at different positions can be insulated respectively, so as to meet different design requirements, thereby ensuring the safety of the battery pack.

[0054] It can be understood that the high-pressure connector and the battery cell assembly 6 are arranged oppositely and are not located on the same side, and are spaced apart by the first spacer 411 and the second spacer 412 arranged oppositely. Therefore, the first spacer 411 and the second spacer 412 are spaced apart, and the flow guide channel 5 is located between the first spacer 411 and the second spacer 412. The flow guide channel 5 is used for discharging the leaked liquid and will not penetrate and contact the battery cell assembly 6 or the high-pressure connector. Of course, if the high-pressure connector and the battery cell assembly 6 are located on the same side, only the first spacer 411 or the second spacer 412 needs to be arranged.

[0055] Optionally, in an embodiment of the present disclosure, the spacer 41 is configured as a plate body, and the plate body is made of plastic or metal. The plate body can separate the filling space, so as to facilitate the filling of the filling material 42.

[0056] Optionally, in another embodiment of the present disclosure, the spacer 41 is made of foam material. The foam material can also separate the filling space, and the foam material has small voids, so that the filling material 42 will not penetrate and can still block the filling material 42.

[0057] Optionally, in another embodiment of the present disclosure, the battery pack further comprises a battery cell assembly 6 connected in the accommodation space 12.

[0058] The spacer 41 is located between the side wall of the accommodation space 12 and the battery cell assembly 6, and the spacer 41 is arranged separately from the side wall of the accommodation space 12 and the battery cell assembly 6, so as to separate the first filling space 1 and the second filling space 2. The first filling space 1 and the second filling space 2 are both filled with the filling material 42.

[0059] The high-pressure connecting piece can be located on the side wall of the containing space 12, and the space between the cell assembly 6 on the side wall of the containing space 12 can be isolated by the spacer 41 to simultaneously isolate two filling spaces, i.e., the first filling space 1 and the second filling space 2, which can be used to arrange the filling material 42, so as to reduce the material and quantity of the spacer 41 and reduce the cost and weight. The high-pressure connecting piece located on the side wall of the containing space 12 can be isolated by the filling material 42 filled in the first filling space 1 to avoid contact between the leaked liquid and the high-pressure connecting piece, and the cell assembly 6 can be isolated by the filling material 42 filled in the second filling space 2 to avoid contact between the cell assembly 6 and the leaked liquid, so as to isolate the high-pressure connecting piece and the cell assembly 6 arranged at different positions respectively and meet different design requirements, thereby ensuring the safety of the battery pack.

[0060] It can be understood that the high-pressure connecting piece and the cell assembly 6 are arranged oppositely and are not located on the same side, and can be directly separated by the spacer 41. The flow guide channel 5 can be located in the spacer 41, and the flow guide channel 5 is used for discharging the leaked liquid and will not penetrate and contact the cell assembly 6 or the high-pressure connecting piece.

[0061] Optionally, in an embodiment of the present disclosure, the spacer 41 has a plurality of gaps or reserved channels 44 that are communicated with each other and with the flow guide channel 5. In this way, the spacer 41 can be used for the flow of the leaked liquid to realize the flow guide discharge of the leaked liquid and reduce the quantity and material of the spacer 41 and reduce the cost. It should be noted that the size of the gap and the size of the reserved channel 44 can be set according to the material and actual situation, and the reserved channel 44 is not limited to be a rectangular or square cross-sectional shape, and the like, and the reserved channel 44 is not limited to be a rectangular or square cross-sectional shape.

[0062] Optionally, in an embodiment of the present disclosure, the spacer 41 is configured as a plate body, and the plate body is made of plastic or metal. The plate body can separate the filling space, and the filling of the filling material 42 is facilitated.

[0063] The plate body can be provided with a groove or a reserved channel 44, and the groove or the reserved channel 44 is communicated with the flow guide channel 5 to realize the flow guide discharge of the leaked liquid and does not affect the discharge of the leaked liquid.

[0064] Optionally, in another embodiment of the present disclosure, the spacer 41 is made of foam material. The foam material can also separate the filling space, and the gap of the foam material is small, the filling material 42 will not penetrate, and the filling material 42 can still be blocked. The foam material has a gap that can be used for the flow of the leaked liquid, so as to realize the flow guide discharge of the leaked liquid.

[0065] Optionally, in an embodiment of the present disclosure, the filling material 42 is configured as a sealant. The sealant can be solidified to form a solid, and can play a good sealing and insulation effect. It should be noted that the sealant is in a liquid state before solidification, and is filled into the filling space. The sealant can be blocked by the spacer 41, so that the sealant is kept in the filling space, and the sealant is prevented from overflowing everywhere.

[0066] Optionally, in another embodiment of the present disclosure, the filling material 42 can be a foaming material. The filling material can be foamed in the filling space to produce an insulation effect.

[0067] Optionally, in an embodiment of the present disclosure, the flow guide channel 5 can be formed by a space surrounded by the spacer 41 and the top surface of the liquid cooling plate 22, for guiding the leaked liquid. In some examples, the space surrounded by the first spacer 411 and the second spacer 412 and the top surface of the liquid cooling plate 22 is the flow guide channel 5. In other examples, the space surrounded by the gap or the reserved channel 44 in the spacer 41 and the top surface of the liquid cooling plate 22 can be configured as the flow guide channel 5. It can be understood that the liquid cooling plate 22 is located at the inner bottom wall of the containing space 12.

[0068] Optionally, in another embodiment of the present disclosure, the flow guide channel 5 is configured as a pipe 51, and the two ends of the pipe 51 are respectively connected with the liquid leakage valve 3 and the connecting joint located in the containing space 12. By such a configuration, the protection effect of the leaked liquid can be further improved, and the situation that the spacer 41 is squeezed by the swelling of the battery cell to occupy the flow guide channel 5 can be avoided. The pipe 51 can increase an insulation effect, and can prevent the leaked liquid from contacting the battery cell assembly 6 or the high-voltage connecting piece, so as to ensure the guiding effect of the leaked liquid.

[0069] In some examples, the pipe 51 can be a circular pipe, and the pipe 51 is directly connected in the containing space 12. In some examples, the pipe 51 can be a semicircular pipe, and the semicircular pipe is arranged on the top surface of the liquid cooling plate 22. The flow guide channel 5 is formed by the semicircular pipe and the top surface of the liquid cooling plate 22, and is used for flowing the leaked liquid.

[0070] Optionally, in an embodiment of the present disclosure, the insulation part 4 is provided with a reinforcing rib 7, the reinforcing rib 7 is arranged along the transverse direction of the box body 1, and the reinforcing rib 7 is close to the flow guide channel 5. The reinforcing rib 7 can increase the structural strength of the flow guide channel 5, and can prevent the spacer 41 from occupying the flow guide channel 5.

[0071] In some examples, the two ends of the reinforcing rib 7 can be connected with the first spacer 411 and the second spacer 412 respectively, the reinforcing rib 7 is located between the first spacer 411 and the second spacer 412, and the number of reinforcing ribs 7 can be multiple and can be arranged in the vertical direction.

[0072] Optionally, in an embodiment of the present disclosure, the liquid-cooled component 2 comprises a liquid-cooled plate 22 and a liquid-cooled pipe 21, the liquid-cooled plate 22 is located in the accommodation space 12, one end of the liquid-cooled pipe 21 extends into the accommodation space 12 and is connected with the liquid-cooled plate 22, and the connection joint is arranged at the connection position of the liquid-cooled pipe 21 and the liquid-cooled plate 22.

[0073] In some examples, one part of the liquid-cooled pipe 21 is located in the box 1, and the other part penetrates into the box 1 to the accommodation space 12, and the connection position of the liquid-cooled pipe 21 and the liquid-cooled plate 22 is prone to liquid leakage, so the flow guide channel 5 is in communication with the connection position of the liquid-cooled pipe 21 and the liquid-cooled plate 22, and can guide the liquid leaked from the connection position of the liquid-cooled pipe 21 and the liquid-cooled plate 22. In some examples, the liquid-cooled plate 22 can support the battery cell assembly 6, the filling material 42, the spacer 41, etc.

[0074] Optionally, in an embodiment of the present disclosure, the box 1 comprises a tray 11 and a top cover, the accommodation space 12 is arranged in the tray 11, and the top cover is arranged on the top of the tray 11 to close the accommodation space 12.

[0075] The second aspect of the present disclosure also provides a vehicle comprising the above-mentioned battery pack.

[0076] The preferred embodiments of the present disclosure are described in detail above with reference to the drawings, but the present disclosure is not limited to the specific details in the above-described embodiments, and various simple modifications can be made to the technical solutions of the present disclosure within the technical concept of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0077] In addition, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0078] In addition, various different embodiments of the present disclosure can also be combined in any appropriate manner, as long as they do not deviate from the idea of the present disclosure, and they should also be considered as disclosed by the present disclosure.

Claims

1. A battery pack, characterized by, The battery pack comprises: a box body having a containing space inside; a liquid cooling component having a connecting joint, at least part of the connecting joint being located in the containing space; a liquid leakage valve connected to the box body, the liquid leakage valve being in communication with the containing space; an insulation part connected to the containing space, the insulation part being capable of insulating a flow channel, the flow channel being in communication with the liquid leakage valve and the connecting joint located in the containing space, and the flow channel being used for the flow of leaked liquid.

2. The battery pack of claim 1, wherein, The insulation part comprises a spacer and a filling material, the spacer being connected in the containing space, and the spacer being used for spacing a filling space, and the filling material being filled in the filling space.

3. The battery pack of claim 2, wherein, The battery pack further comprises an electric core assembly connected in the containing space. The spacer comprises a first spacer and a second spacer, the first spacer being arranged to be spaced apart from a side wall of the containing space to space a first filling space, and the second spacer being arranged to be spaced apart from the electric core assembly to space a second filling space, and the first filling space and the second filling space being both filled with the filling material.

4. The battery pack of claim 2, wherein, The battery pack further comprises an electric core assembly connected in the containing space. The spacer is located between the side wall of the containing space and the electric core assembly, and the spacer is arranged to be spaced apart from the side wall of the containing space and the electric core assembly respectively to space a first filling space and a second filling space, and the first filling space and the second filling space being both filled with the filling material.

5. The battery pack of claim 4, wherein, The spacer has a plurality of intercommunicating voids or reserved channels, and the voids or the reserved channels are in communication with the flow channel.

6. The battery pack of claim 2, wherein, The filling material is arranged as a sealant.

7. The battery pack of claim 2, wherein, The spacer is configured as a plate body, and the plate body is made of plastic or metal; or The spacer is configured as a foam material.

8. The battery pack of claim 1, wherein, The flow channel is configured as a pipeline, and two ends of the pipeline are in communication with the liquid leakage valve and the connecting joint located in the containing space respectively.

9. The battery pack of claim 1, wherein, The insulation part is provided with a reinforcing rib, the reinforcing rib being arranged along a transverse direction of the box body, and the reinforcing rib being close to the flow channel.

10. The battery pack of any one of claims 1-9, wherein, The liquid cooling component comprises a liquid cooling plate and a liquid cooling pipe, the liquid cooling plate being located in the containing space, one end of the liquid cooling pipe being inserted into the containing space and connected with the liquid cooling plate, and the connecting joint being arranged at a connection position of the liquid cooling pipe and the liquid cooling plate.

11. A vehicle characterized by comprising: The battery pack comprises any one of the battery packs according to claims 1-10.

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