Battery pack and powered device

Abstract

The present disclosure relates to a battery pack and an electric device, the battery pack comprising a shell, a battery assembly, a glue-filling structure and an isolation layer, the shell having a containing groove; the battery assembly is arranged in the containing groove, and a gap is formed between the battery assembly and at least part of the inner wall surface of the containing groove; at least part of the glue-filling structure is arranged in the gap; the isolation layer is at least partially arranged between the inner wall surface of the containing groove and the glue-filling structure, and is configured to be separable from the inner wall surface of the containing groove and / or the glue-filling structure. Through the above technical solution, the battery pack provided by the present disclosure can solve the problem that the battery assembly is inconvenient to disassemble when the battery assembly inside the battery pack is maintained and replaced in the related art, and has the advantages of high operation convenience and high efficiency.

Description

Technical Field

[0001] This disclosure relates to the field of battery pack technology, and more specifically, to a battery pack and an electrical device. Background Technology

[0002] In related technologies, there is a problem that the battery components inside the battery pack are not easy to disassemble when repairing or replacing them. Summary of the Invention

[0003] The purpose of this disclosure is to provide a battery pack and electrical device that can solve the problem in the related art where the battery components inside the battery pack are not easy to disassemble during maintenance and replacement.

[0004] To achieve the above objectives, a first aspect of this disclosure provides a battery pack, comprising: a housing having a receiving groove; a battery assembly disposed within the receiving groove, the battery assembly having a gap between it and at least a portion of the inner wall surface of the receiving groove; a potting structure, at least a portion of the potting structure being disposed within the gap; and an insulating layer, at least a portion of which is disposed between the inner wall surface of the receiving groove and the potting structure, the insulating layer being configured to be separable from the inner wall surface of the receiving groove and / or the potting structure.

[0005] Optionally, the isolation layer is made of a high molecular polymer.

[0006] Optionally, the polymer includes at least one of polytetrafluoroethylene, ultra-high molecular weight polyethylene, silicone rubber, and polyoxymethylene.

[0007] Optionally, the isolation layer is a coating applied to the inner wall of the receiving groove, or the isolation layer is an isolation membrane disposed between the receiving groove and the potting structure.

[0008] Optionally, the isolation layer includes a bottom wall and a side wall, the side wall being arranged circumferentially around the bottom wall, the side wall being disposed on the side wall surface of the inner wall of the receiving groove, and the bottom wall being disposed on the bottom wall surface of the inner wall of the receiving groove.

[0009] Optionally, the bottom wall and the side wall are constructed as a single unit.

[0010] Optionally, there may be multiple receiving slots, and the multiple bottom walls of the multiple isolation layers in the multiple receiving slots are constructed as a single unit.

[0011] Optionally, the housing includes a base plate assembly, the bottom wall surface of the receiving groove is formed on the base plate assembly, the battery assembly includes a battery cell, the battery cell has a pressure relief member facing the base plate assembly, and the base plate assembly is provided with a pressure relief port opposite to the pressure relief member; wherein, the bottom wall is fitted to the base plate assembly to cover the pressure relief port, and the bottom wall is configured to form a communication port connecting the pressure relief port and the pressure relief member when the battery cell experiences thermal runaway; or, the bottom wall is connected to the base plate assembly to have a communication port connecting the pressure relief port and the pressure relief member.

[0012] Optionally, the base plate assembly includes a first plate and a second plate arranged opposite to each other, the bottom wall surface of the receiving groove is formed on the first plate, the first plate is provided with the pressure relief port, an exhaust channel is formed between the first plate and the second plate, and the exhaust channel communicates with the pressure relief port.

[0013] Optionally, the battery pack further includes a cover connected to the housing, the cover being located on the opening side of the receiving slot.

[0014] Optionally, the cover and the isolation layer are made of the same material.

[0015] Optionally, a sealant cover is provided between the cover and the battery assembly. The sealant cover is connected to the battery assembly through the potting structure to block the space between the potting structure and the cover.

[0016] Optionally, the cover is configured to limit the position of the battery assembly, the sealant cover, and a portion of the potting structure located between the sealant cover and the battery assembly in the height direction of the battery pack.

[0017] Optionally, a positioning structure is provided on the inner wall surface of the cover body facing the adhesive seal, and a positioning and fitting structure is provided on the outer wall surface of the adhesive seal facing the cover body. The positioning structure and the positioning and fitting structure are used for positioning and fitting.

[0018] Optionally, the positioning structure includes one of a positioning groove and a positioning protrusion, and the positioning mating structure includes the other of the positioning groove and the positioning protrusion.

[0019] Optionally, the battery assembly includes a battery cell and a busbar assembly; the seal cover is provided with a first socket for an electrical connector of the busbar assembly to pass through, and the cover body is provided with a second socket for an electrical connector of the busbar assembly to pass through.

[0020] Optionally, a maintenance cover for covering the second socket is provided on the outer wall surface of the cover body opposite to the rubber seal cover.

[0021] Optionally, the adhesive-resistant cover is formed from a portion of the insulating layer, or the adhesive-resistant cover is arranged independently of the insulating layer.

[0022] Optionally, the adhesive cover is a metal cover or a plastic cover.

[0023] Optionally, there are multiple receiving slots; wherein the number of adhesive-blocking covers is the same as the number of receiving slots and they are arranged in a one-to-one correspondence; or, at least two of the receiving slots are separated from the cover body by one of the adhesive-blocking covers.

[0024] Optionally, a limiting structure is provided in the receiving groove, and the potting structure forms a limiting fit structure. The limiting structure and the limiting fit structure limit each other to restrict the position of the battery assembly relative to the receiving groove in a plane perpendicular to the height direction of the battery pack, and allow the battery assembly to move toward the opening side of the receiving groove in the height direction.

[0025] Optionally, the limiting structure includes a first groove structure recessed within the inner wall of the receiving groove, and the limiting mating structure includes a first protrusion structure that inserts into the first groove structure; and / or, the limiting structure includes a second protrusion structure protruding outward from the inner wall of the receiving groove, and the limiting mating structure includes a second groove structure that inserts into the second protrusion structure.

[0026] Optionally, the first groove structure and / or the second protrusion structure extend along the height direction, and one end near the opening side of the receiving groove is flush with the opening side of the receiving groove.

[0027] Optionally, the limiting structure and the limiting mating structure are arranged in multiple circumferentially spaced around the opening side of the receiving groove.

[0028] Optionally, the potting structure is formed using foamed adhesive and / or non-foamed adhesive.

[0029] Optionally, the housing includes a base plate assembly, a frame, and a partition beam, the frame being arranged circumferentially around the base plate assembly, and the inner side of the frame being divided into at least two receiving slots by the partition beam.

[0030] A second aspect of this disclosure provides an electrical device including the battery pack provided in the first aspect.

[0031] By employing the aforementioned technical solution, namely the battery pack provided in this disclosure, and by disposing of at least a portion of the insulating layer between the inner wall of the receiving groove and the potting structure, it is understood that after potting operations are performed, for example, within the battery pack, the gap between the battery assembly and at least a portion of the inner wall of the receiving groove is filled with, for example, adhesive to form the aforementioned potting structure. This allows the battery assembly and the potting structure to form a single unit. Furthermore, since the insulating layer is positioned between the inner wall of the receiving groove and the potting structure and is designed to be separable from the inner wall of the receiving groove and / or the potting structure, this arrangement facilitates the removal of the battery assembly and the potting structure as a single unit from the housing during maintenance or replacement of the battery assembly within the battery pack. This improves the convenience of maintenance operations. Additionally, since the battery assembly and the potting structure can be removed together from the housing, it is also convenient to re-pot the battery pack after replacing a new battery assembly, thus improving potting efficiency.

[0032] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0033] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings: Figure 1 This is an exploded schematic diagram of a battery pack provided in an exemplary embodiment of this disclosure; Figure 2 This is a schematic diagram of the structure of a battery pack provided in an exemplary embodiment of the present disclosure, showing that the battery assembly and the potting structure are formed as a whole and pulled out from the housing, while a communication port is formed on the bottom wall of the insulating layer; Figure 3 This is a schematic diagram of the structure of the battery pack after removing the cover and the adhesive sealant in an exemplary embodiment of this disclosure; Figure 4 This is a schematic diagram of the battery pack structure after the cover is removed, provided in an exemplary embodiment of this disclosure; Figure 5 yes Figure 4 A magnified view of a portion of location A in the diagram; Figure 6 This is a schematic diagram of the bottom wall structure of the shell and the isolation layer provided in an exemplary embodiment of this disclosure.

[0034] Explanation of reference numerals in the attached figures 1-Shell; 110-Receiving groove; 111-Side wall; 112-Bottom wall; 113-Opening side; 120-Bottom plate assembly; 121-Pressure relief port; 122-First plate; 123-Second plate; 124-Exhaust channel; 130-Frame; 140-Separating beam; 2-Battery assembly; 210-Battery cell; 220-Bus bus assembly; 230-Electrical connector; 3-Gap; 4-Potting structure; 5-Separating layer; 510-Bottom wall; 511-Connecting port; 520-Side wall; 6-Cover; 610-Second insertion port; 7-Glue-blocking cover; 710-Positioning mating structure; 720-First insertion port; 8-Maintenance cover; 9-Limiting structure; 910-First groove structure; 10-Limiting mating structure; 1010-First protrusion structure. Detailed Implementation

[0035] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0036] In this disclosure, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower dimensions within the space of the battery pack when it is in use. "Inner" and "outer" refer to the inner and outer dimensions relative to the outline of the component or structure itself. Furthermore, it should be noted that terms such as "first" and "second" are used to distinguish one element from another and do not indicate sequence or importance. Additionally, in the description with reference to the accompanying drawings, the same reference numerals in different drawings denote the same elements.

[0037] According to a first aspect of this disclosure, a battery pack is provided, with reference to... Figures 1 to 6 As shown, the battery pack includes a housing 1, a battery assembly 2, a potting structure 4, and a separator 5. The housing 1 has a receiving groove 110. The battery assembly 2 is disposed in the receiving groove 110, and a gap 3 is formed between the battery assembly 2 and at least a portion of the inner wall surface of the receiving groove 110. At least a portion of the potting structure 4 is disposed in the gap 3. The separator 5 is at least partially disposed between the inner wall surface of the receiving groove 110 and the potting structure 4, and the separator 5 is configured to be separable from the inner wall surface of the receiving groove 110 and / or the potting structure 4.

[0038] Through the above-described technical solution, namely the battery pack provided in this disclosure, by at least partially disposing the insulating layer 5 between the inner wall surface of the receiving groove 110 and the potting structure 4, it can be understood that after potting operations are performed, for example, within the battery pack, after filling the gap 3 between the battery assembly 2 and at least part of the inner wall surface of the receiving groove 110 with, for example, adhesive to form the aforementioned potting structure 4, the battery assembly 2 and the potting structure 4 can be formed as a whole. Furthermore, because the insulating layer 5 is positioned between the inner wall surface of the receiving groove 110 and the potting structure 4 and is constructed as... The battery pack can be separated from the inner wall of the receiving groove 110 and / or the potting structure 4. This arrangement makes it easy to pull out the battery pack 2 and the potting structure 4 as a whole from the housing 1 when repairing or replacing the battery pack 2, for example. This improves the convenience of the repair operation. At the same time, since the battery pack 2 and the potting structure 4 can be pulled out from the housing 1 together, it is also convenient to re-pot the battery pack after replacing the new battery pack 2, which helps to improve the potting efficiency.

[0039] It should be noted that in related technologies, after potting operations are performed inside, for example, a battery pack, the battery components are usually directly connected to the inner wall of the casing through the potting structure formed by the adhesive. Therefore, when the battery components fail (e.g., after thermal runaway of a single battery cell) and it is necessary to repair or replace the battery components inside the battery pack, it is often inconvenient for on-site operators to pull the battery components out of the casing for subsequent replacement operations because the battery components are directly bonded to the inner wall of the casing through the potting structure.

[0040] In this disclosure, because an isolation layer 5 is provided, and the isolation layer 5 is positioned between the inner wall of the receiving groove 110 and the potting structure 4, the battery assembly 2 is prevented from being directly bonded to the inner wall of the housing 1 through the potting structure 4. That is, it can be understood that the battery assembly 2 and the potting structure 4 can be formed as a whole. At the same time, since the isolation layer 5 is designed to be separable from the inner wall of the receiving groove 110 and / or the potting structure 4, it is convenient to remove the integrated structure formed by the battery assembly 2 and the potting structure 4 from the housing 1 when repairing or replacing the battery assembly 2 inside the battery pack, so as to replace the battery assembly 2. This improves the convenience of the repair operation. At the same time, since the battery assembly 2 and the potting structure 4 can be removed from the housing 1 together, it is also convenient to re-pot the battery pack after replacing the new battery assembly 2, which helps to improve the potting efficiency.

[0041] In order to ensure that the insulating layer 5 is stably blocked between the inner wall of the receiving groove 110 and the potting structure 4, in some embodiments, the material of the insulating layer 5 can be a high molecular polymer, so as to ensure that the insulating layer 5 is stably blocked between the inner wall of the receiving groove 110 and the potting structure 4, so as to facilitate the extraction of the battery assembly 2 and the potting structure 4 as an integral structure from the housing 1.

[0042] The polymer is typically a high molecular weight compound composed of many identical, simple structural units repeatedly linked by covalent bonds. For example, the polymer may include at least one of polytetrafluoroethylene (PTFE), ultra-high molecular weight polyethylene (UHMWPE, typically unbranched linear polyethylene with a molecular weight of 1.5 million or more), silicone rubber, and polyoxymethylene (POM). Since the separator layer 5 formed by the above-mentioned materials such as PTFE, UHMWPE, silicone rubber, and POM has a certain degree of de-adhesion, it can better separate the separator layer 5 from the potting structure 4, so as to facilitate the extraction of the battery assembly 2 and the potting structure 4 as a whole from the housing 1, thereby realizing the replacement of the battery assembly 2 and improving the convenience of maintenance operations.

[0043] Optionally, in some embodiments, the isolation layer 5 can be a coating applied to the inner wall of the receiving tank 110. For example, the aforementioned high molecular polymers such as polytetrafluoroethylene, ultra-high molecular weight polyethylene, silicone rubber, and polyoxymethylene can be applied to the inner wall of the receiving tank 110 to form a coating. In this way, an isolation layer 5 is formed between the inner wall of the receiving tank 110 and the potting structure 4 by means of the coating being connected to the inner wall of the housing 1. This facilitates the extraction of the battery assembly 2 and the potting structure 4 as a whole from the housing 1. At the same time, the overall weight of the coating structure is relatively light, which also facilitates the lightweight design of the entire battery pack.

[0044] Additionally, it should be noted that since the coating can be pre-applied to the inner wall of the housing 1, and when the separator 5 is made of materials such as polytetrafluoroethylene, ultra-high molecular weight polyethylene, silicone rubber, and polyoxymethylene, it has a certain degree of de-adhesion. After the battery assembly 2 and the potting structure 4 are extracted from the housing 1 as a whole, it is convenient to re-pot the battery pack after replacing the new battery assembly 2. At the same time, since it can save the process step of re-coating the inner wall of the housing 1, it also helps to improve the potting efficiency.

[0045] Alternatively, in other embodiments, the separator 5 may also be a separator membrane disposed between the receiving groove 110 and the potting structure 4. For example, the separator membrane may be made of high molecular weight polymers such as polytetrafluoroethylene, ultra-high molecular weight polyethylene, silicone rubber and polyoxymethylene. In this way, by attaching the separator membrane to the inner wall of the housing 1, a separator layer 5 is formed between the inner wall of the receiving groove 110 and the potting structure 4, so as to facilitate the extraction of the battery assembly 2 and the potting structure 4 as a whole from the housing 1.

[0046] This disclosure does not specifically limit the variation of the specific arrangement of the aforementioned separator 5. Those skilled in the art can adapt the specific arrangement of the separator 5 according to actual application needs, such as the type of polymer used in the separator 5. For example, if the polymer used in the separator 5 includes materials such as polytetrafluoroethylene, ultra-high molecular weight polyethylene, silicone rubber, and polyoxymethylene, due to its certain de-adhesion properties, the separator 5 can be adapted to be, for example, a coating applied to the inner wall of the receiving groove 110 or a separator film disposed between the receiving groove 110 and the potting structure 4. In this way, when the battery assembly 2 and the potting structure 4 are formed... When the integrated structure formed by the battery assembly 2 and the potting structure 4 is extracted from the housing 1, if the separator 5 is constructed as, for example, a coating applied to the inner wall of the receiving groove 110, the integrated structure formed by the battery assembly 2 and the potting structure 4 can be extracted from the housing 1 separately, and the coating will remain on the housing 1; if the separator 5 is constructed as, for example, a separator film disposed between the receiving groove 110 and the potting structure 4, the separator film can be optionally left in the housing 1 after the integrated structure formed by the battery assembly 2 and the potting structure 4 is extracted from the housing 1, and the potting operation is re-performed in the battery pack after the new battery assembly 2 is replaced, so that the separator film is re-adhered to the inner wall of the receiving groove 110 under the action of the potting structure 4; When the polymer used in the separator 5 is a material that does not have debonding properties, such as polyimide (PI), polyurethane (PU) and polyamide (PA), the separator 5 will adhere to the potting structure 4. Therefore, in order to enable the battery assembly 2 and the potting structure 4 to be extracted from the housing 1 as a whole, the separator 5 can be adapted to be a separator film placed between the receiving groove 110 and the potting structure 4. In this way, when the battery assembly 2 and the potting structure 4 are extracted from the housing 1 as a whole, the separator film that is adhered to the potting structure 4 can be extracted together.

[0047] Considering that in order to better achieve the extraction of the battery assembly 2 and the potting structure 4 as a whole from the housing 1 and reduce the difficulty of on-site operation, in some embodiments, reference is made to Figure 1 , Figure 2as well as Figure 6 As shown, the isolation layer 5 may include a bottom wall 510 and a side wall 520. The side wall 520 is arranged circumferentially around the bottom wall 510. The side wall 520 is disposed on the side wall surface 111 of the inner wall surface of the receiving groove 110, and the bottom wall 510 is disposed on the bottom wall surface 112 of the inner wall surface of the receiving groove 110. In this way, by arranging the isolation layer 5 on the side wall surface 111 and the bottom wall surface 112 of the housing 1, it is possible to better ensure that the isolation layer 5 is isolated between the housing 1 and the potting structure 4. This can prevent the battery assembly 2 from being directly bonded to the inner wall surface (side wall surface 111 and bottom wall surface 112) of the housing 1 through the potting structure 4. This can facilitate the removal of the battery assembly 2 and the potting structure 4 as a whole from the housing 1 when the battery assembly 2 is repaired or replaced.

[0048] It should be noted that the sidewall 520 provided on the sidewall surface 111 of the inner wall of the receiving groove 110 can be understood as follows: for example, the sidewall 520 of the isolation layer 5 is constructed as an isolation membrane provided between the receiving groove 110 and the potting structure 4, so that the sidewall 520 can be attached to the sidewall surface 111 of the inner wall of the receiving groove 110. Alternatively, the sidewall 520 of the isolation layer 5 can be constructed as a coating applied to the inner wall of the receiving groove 110, so that the sidewall 520 can be connected to the sidewall surface 111 of the inner wall of the receiving groove 110.

[0049] Furthermore, the bottom wall 510 disposed on the bottom wall surface 112 of the inner wall surface of the receiving groove 110 can be understood as follows: for example, the bottom wall 510 of the isolation layer 5 is constructed as an isolation membrane disposed between the receiving groove 110 and the potting structure 4, so that the bottom wall 510 can adhere to the bottom wall surface 112 of the inner wall surface of the receiving groove 110; or, the bottom wall 510 of the isolation layer 5 can be constructed as a coating applied to the inner wall surface of the receiving groove 110, so that the bottom wall 510 can be connected to the bottom wall surface 112 of the inner wall surface of the receiving groove 110.

[0050] For example, such as Figure 1 , Figure 2 as well as Figure 6As shown, the housing 1 may include a base plate assembly 120, the bottom wall surface 112 of the receiving groove 110 is formed on the base plate assembly 120, the battery assembly 2 may include a battery cell 210, the battery cell 210 has a pressure relief member (not shown) facing the base plate assembly 120, the base plate assembly 120 is provided with a pressure relief port 121 opposite to the position of the pressure relief member, wherein the bottom wall 510 of the separator 5 can be attached to the base plate assembly 120. For example, by constructing the separator 5 as a separator film disposed between the receiving groove 110 and the potting structure 4 as described above, it is possible to achieve the effect of blocking the housing 1 and the potting structure 4 through the separator 5, while allowing the separator 5 to pass through... The bottom wall 510 can cover the pressure relief port 121, and the bottom wall 510 of the insulating layer 5 can be configured to form a connection port 511 connecting the pressure relief port 121 and the pressure relief component when the battery cell 210 experiences thermal runaway. This ensures that the insulating layer 5 facilitates the maintenance and replacement of the battery assembly 2. Furthermore, in the event of thermal runaway in the battery cell 210 (e.g., when the pressure relief component of the battery cell 210 is activated), the insulating layer 5 covering the pressure relief port 121 can be ruptured by high-temperature, high-pressure gas or high-temperature conductive material ejected from the pressure relief component, thus forming the connection port 511 connecting the pressure relief port 121 and the pressure relief component (see reference). Figure 2 As shown in the figure, this is to achieve the purpose of pressure relief, which helps to improve the safety of the entire battery pack.

[0051] Additionally, in some implementations, references Figures 1 to 6 As shown, the housing 1 may also include a frame 130, which is arranged circumferentially around the base plate assembly 120 to form the aforementioned receiving groove 110. The bottom wall 510 of the aforementioned isolation layer 5 can be arranged independently from the side wall 520. For example, the bottom wall 510 of the aforementioned isolation layer 5 can be provided on the base plate assembly 120 in advance. After the frame 130 is connected to the base plate assembly 120, the side wall 520 of the isolation layer 5 is provided on the remaining inner wall surface where the receiving groove 110 can directly contact the potting structure 4. Thus, the isolation layer 5 can be used to block the housing 1 and the potting structure 4, so as to facilitate the maintenance and replacement of the battery assembly 2.

[0052] Alternatively, in some alternative embodiments not shown, the bottom wall 510 of the isolation layer 5 may be integrally constructed with the side wall 520. For example, after the frame 130 is connected to the base plate assembly 120, the isolation layer 5, which is integrally constructed with the bottom wall 510 and the side wall 520, may be adaptively provided on the inner wall surface of the receiving groove 110 to prevent the potting structure 4 from directly contacting the inner wall surface of the receiving groove 110. This disclosure does not specifically limit such variations. Those skilled in the art can design them adaptively according to actual needs. The purpose is to prevent the potting structure 4 from directly contacting the inner wall surface of the receiving groove 110 by blocking the inner wall surface of the receiving groove 110 with the potting structure 4 through the isolation layer 5.

[0053] Additionally, in some implementations, references Figures 1 to 6 As shown, the housing 1 may also include a partition beam 140, which divides the inner side of the frame 130 into at least two receiving slots 110, for example... Figure 6 The illustration exemplarily shows that the number of partition beams 140 can be one, and the partition beam 140 divides the frame 130 into two receiving slots 110. The battery assembly 2 can be disposed in both receiving slots 110, and the battery assembly 2 located in the two receiving slots 110 can be charged and discharged simultaneously or individually. This disclosure is not limited thereto.

[0054] It should be noted that when the inner side of the frame 130 is divided into multiple receiving slots 110 by the partition beam 140, that is, when there are multiple receiving slots 110, the multiple bottom walls 510 of the multiple isolation layers 5 in the multiple receiving slots 110 can be constructed as a single unit. For example, as shown in the figure... Figure 6 As shown, when there are two receiving slots 110, the two bottom walls 510 of the two isolation layers 5 in the two receiving slots 110 can be constructed as one unit. That is, it can be understood that, for example, the bottom wall 510 of the above-mentioned isolation layer 5 can be provided on the base plate assembly 120 in advance. After the frame 130 and the partition beam 140 are connected to the base plate assembly 120, the side wall 520 of the isolation layer 5 is provided on the remaining inner wall surface where the receiving slot 110 can directly contact the potting structure 4. In this way, the isolation layer 5 can be used to block the space between the housing 1 and the potting structure 4, so as to facilitate the maintenance and replacement of the battery assembly 2.

[0055] Alternatively, in some alternative embodiments not shown, the multiple bottom walls 510 of the multiple isolation layers 5 in the multiple receiving grooves 110 can also be arranged independently. This disclosure does not specifically limit such variations. Those skilled in the art can design them adaptively according to actual needs. The purpose is to prevent the glue-filling structure 4 from directly contacting the inner wall of the receiving groove 110 by using the isolation layer 5 to block the inner wall of the receiving groove 110 from contacting the inner wall of the receiving groove 110.

[0056] It should be noted that the aforementioned pressure relief component can adopt any suitable structure according to actual application requirements. For example, the pressure relief component can be, for example, an explosion-proof valve, a pressure relief valve, or a safety valve, etc., and this disclosure does not make specific limitations in this regard. In addition, the aforementioned battery cell 210 can be constructed in the form of, for example, a battery cell, which is the smallest discharge power source in the battery assembly, and includes positive and negative electrode separators and a battery cell casing, etc.

[0057] In addition, the specific embodiment in which the bottom wall 510 of the insulating layer 5 can be attached to the base plate assembly 120 is exemplary. In other alternative embodiments, the bottom wall 510 can also be connected to the base plate assembly 120. For example, the insulating layer 5 can be constructed as a coating on the inner wall surface (side wall surface 111 and bottom wall surface 112) of the receiving groove 110, so that the insulating layer 5 can block the space between the housing 1 and the potting structure 4. At the same time, the bottom wall 510 of the insulating layer 5 can have a connecting port 511 connecting the pressure relief port 121 and the pressure relief component. In this way, it can be ensured that the insulating layer 5 facilitates the maintenance and replacement of the battery assembly 2, and when, for example, the battery cell 210 experiences thermal runaway (for example, when the pressure relief component of the battery cell 210 is opened to relieve pressure), the pressure relief can also be achieved through the connecting port 511, which helps to improve the safety of the entire battery pack.

[0058] Furthermore, in some implementations, references Figure 1 As shown, the base plate assembly 120 may include a first plate 122 and a second plate 123 arranged opposite to each other. The bottom wall surface 112 of the receiving groove 110 is formed on the first plate 122. A pressure relief port 121 is provided on the first plate 122. An exhaust channel 124 is formed between the first plate 122 and the second plate 123. The exhaust channel 124 is connected to the pressure relief port 121. The overall structure is simple and facilitates the pressure relief of the battery pack through the exhaust channel 124.

[0059] It should be noted that, since the bottom wall 510 of the aforementioned isolation layer 5 may have a connecting port 511 that connects the pressure relief port 121 and the pressure relief component, when performing the potting operation after, for example, the battery assembly 2 is placed into the housing 1, the adhesive may easily leak through the connecting port 511 into the exhaust channel 124, affecting the potting effect inside the battery pack. Therefore, in some embodiments not shown, a baffle block (not shown) arranged circumferentially around the connecting port 511 may be provided between the bottom wall 510 of the isolation layer 5 coated on the first plate 122 and the battery assembly 2. For example, the baffle block may be, for example, baffle foam or baffle rubber block, so that the adhesive can be stopped by the baffle block, preventing the adhesive from leaking through the connecting port 511 into the exhaust channel 124, which helps to improve the potting effect inside the battery pack.

[0060] In addition, the first plate 122 mentioned above may include a cooling plate, such as a liquid cooling plate, to cool the multiple battery cells 210 of the battery assembly 2, and to cool down the temperature in the event of thermal runaway. The pressure relief port 121 can be provided on the cooling plate, and the fact that multiple battery cells 210 are cooled by the liquid cooling plate also improves structural economy.

[0061] Alternatively, the first plate 122 may also include a plate body for supporting the multiple battery cells 210 of the battery assembly 2, wherein the aforementioned pressure relief port 121 may be provided on the plate body, which is not specifically limited in this disclosure.

[0062] Considering that the insulating layer 5 blocks the inner wall of the receiving groove 110 from the potting structure 4, preventing the battery assembly 2 from being directly bonded to the inner wall of the housing 1 via the potting structure 4, the battery assembly 2 is prone to displacement. In some embodiments, reference is made to... Figures 1 to 6 As shown, a limiting structure 9 can be provided in the receiving groove 110, and the potting structure 4 can form a limiting fit structure 10. The limiting structure 9 and the limiting fit structure 10 fit together to limit the position of the battery assembly 2 relative to the receiving groove 110 in a plane perpendicular to the height direction of the battery pack, thereby avoiding the risk of displacement of the battery assembly 2 and helping to improve the reliability of the entire battery pack. In addition, since the limiting fit of the limiting structure 9 and the limiting fit structure 10 allows the battery assembly 2 to move toward the opening side 113 of the receiving groove 110 in the height direction, it also makes it easier to pull out the battery assembly 2 and the potting structure 4 as a whole from the housing 1 to realize the replacement operation of the battery assembly 2, thereby improving the convenience of maintenance operations.

[0063] It should be noted that the height direction of the battery pack can be referenced to the connection direction between the battery assembly 2 and the bottom wall surface 112 of the housing 1; in addition, the plane perpendicular to the height direction of the battery pack can be understood as the plane formed by the length and width directions of the battery pack.

[0064] Additionally, for example, such as Figure 1 As shown, the limiting structure 9 may include a first groove structure 910 recessed into the inner wall of the receiving groove 110, and the limiting mating structure 10 may include a first protrusion structure 1010 that is inserted into the first groove structure 910. In this way, the battery assembly 2 can be limited and fixed by the mating connection between the first groove structure 910 and the first protrusion structure 1010, thereby improving the reliability of the entire battery pack and facilitating the extraction of the battery assembly 2 and the potting structure 4 as a whole from the housing 1.

[0065] Alternatively, in some alternative embodiments not shown, the limiting structure 9 may also include a second protrusion structure protruding outward from the inner wall of the receiving groove 110, and the limiting mating structure 10 may include a second groove structure that is inserted into and mated with the second protrusion structure, so as to achieve the purpose of limiting and fixing the battery assembly 2. This disclosure does not specifically limit such variations, and those skilled in the art can design them adaptably according to actual application needs.

[0066] In addition, in order to improve the limiting ability of the limiting structure 9 and the limiting engagement structure 10 on the battery assembly 2, in some embodiments, such as Figure 1 As shown, the limiting structure 9 and the limiting mating structure 10 can be arranged in multiple circumferentially around the opening side 113 of the receiving groove 110, which helps to improve the reliability of the entire battery pack. At the same time, arranging the limiting structure 9 and the limiting mating structure 10 in multiple ways can facilitate the limiting and guiding of the entire structure when the battery assembly 2 and the potting structure 4 are pulled out from the housing 1, thereby improving the convenience of maintenance operations.

[0067] It should be noted that when multiple limiting structures 9 and limiting mating structures 10 are arranged, all of the multiple limiting structures 9 can be arranged as, for example, a first groove structure 910, and all of the multiple limiting mating structures 10 can be arranged as, for example, a first protrusion structure 1010 that inserts into the first groove structure 910. Alternatively, all of the multiple limiting structures 9 can be arranged as, for example, a second protrusion structure, and all of the multiple limiting mating structures 10 can be arranged as, for example, a second groove structure that inserts into the second protrusion structure. Alternatively, some of the multiple limiting structures 9 can be arranged as, for example, a first groove structure 910, and the remaining parts can be constructed as, for example, a second protrusion structure. Alternatively, some of the multiple limiting mating structures 10 can be arranged as a first protrusion structure that inserts into the first groove structure 910, and the remaining parts can be adapted to be a second groove structure that inserts into the second protrusion structure. This disclosure does not impose specific limitations on this.

[0068] Furthermore, considering that in order to facilitate the movement of the battery assembly 2 toward the opening side 113 of the receiving groove 110 in the height direction, thereby achieving the purpose of extracting the battery assembly 2 and the potting structure 4 as an integral structure from the housing 1 to complete the replacement of the battery assembly 2, in some embodiments, such as Figure 1 and Figure 6 As shown, the first groove structure 910 and / or the second protrusion structure can extend along the height direction, and one end near the opening side 113 of the receiving groove 110 is flush with the opening side 113 of the receiving groove 110, so as to facilitate the removal of the battery assembly 2 and the potting structure 4 as a whole from the housing 1 to complete the replacement of the battery assembly 2, which is convenient for disassembly and assembly operations.

[0069] Furthermore, in some embodiments, the aforementioned potting structure 4 can be formed using, for example, expanding foam. Since the expanding foam expands and solidifies after being poured into the battery pack, it can saturate and fill the gap 3 between the battery assembly 2 and the inner wall of the receiving groove 110, improving the potting effect. Simultaneously, during the expansion process, the expanding foam can also saturate and fill the cavities within the aforementioned first groove structure 910 and / or second protrusion structure, thereby forming the aforementioned limiting and fitting structure 10 on the potting structure 4. This allows for the limiting and fixing of the battery assembly 2, improving the overall reliability of the battery pack, and facilitating the extraction of the battery assembly 2 and the potting structure 4 as a single unit from the housing 1. Additionally, the expansion of the expanding foam can also compress the insulating layer 5, improving the reliability of the insulating layer 5 adhering to or connecting to the inner wall of the receiving groove 110. This helps ensure that the insulating layer 5 stably blocks the space between the inner wall of the receiving groove 110 and the potting structure 4.

[0070] Alternatively, the above-mentioned potting structure 4 can also be formed by, for example, non-foaming adhesives, such as ordinary structural adhesives and sealants. This disclosure does not specifically limit such modifications, and those skilled in the art can design them accordingly based on actual application requirements.

[0071] In some implementations, reference Figures 1 to 6 As shown, the battery pack may also include a cover 6 connected to the housing 1. The cover 6 is located on the opening side 113 of the receiving groove 110, thereby providing safety protection. The connection between the cover 6 and the housing 1 can be detachably made using fasteners such as bolts and / or snap-fit ​​structures and / or sealant. This allows the cover 6 to be easily removed and the battery assembly 2 and the encapsulation structure 4, forming a single structure, to be extracted from the housing 1 when the battery assembly 2 needs to be repaired or replaced, for example, after a battery assembly 2 failure (e.g., thermal runaway of a battery cell 210). This facilitates the replacement of the battery assembly 2.

[0072] The cover 6 can be made of the same material as the isolation layer 5. For example, the cover 6 can also be made of a polymer with certain de-adhesion properties, such as polytetrafluoroethylene, ultra-high molecular weight polyethylene, silicone rubber and polyoxymethylene. In this way, after the cover 6 is connected to the opening side 113 of the shell 1, the risk of the potting structure 4 being directly bonded to the cover 6 can be reduced because the cover 6 has certain de-adhesion properties.

[0073] In addition, to improve the overall structural strength of the battery pack and facilitate the overall structural design, a fully encapsulated potting method is adopted inside the battery pack. Therefore, to prevent the potting structure 4 from being directly bonded to the cover 6, thus affecting the disassembly and assembly of the cover 6, in some embodiments, reference is made to... Figure 1 and Figure 2 As shown, a sealant cover 7 can be provided between the cover 6 and the battery assembly 2. The sealant cover 7 is connected to the battery assembly 2 through the potting structure 4 to block the potting structure 4 and the cover 6, thereby preventing the potting structure 4 from being directly bonded to the cover 6, so as to facilitate the disassembly and assembly of the cover 6.

[0074] It should be noted that when the cover 6 is made of a material with certain de-adhesion properties, the aforementioned adhesive-blocking cover 7 may or may not be provided between the cover 6 and the battery assembly 2, depending on actual needs. Of course, since the adhesive-blocking cover 7 is provided between the cover 6 and the battery assembly 2 to block the adhesive filling structure 4 and the cover 6, the cover 6 may also be made of a metal plate such as an aluminum plate or a steel plate, and this disclosure does not specifically limit it in this regard.

[0075] Furthermore, it should be noted that the cover 6 can be configured to limit the position of the battery assembly 2, the sealant cover 7, and the portion of the potting structure 4 located between the sealant cover 7 and the battery assembly 2 in the height direction of the battery pack. That is, it can be understood that, for example, after the cover 6 is connected to the opening side 113 of the housing 1, the cover 6 can abut against the sealant cover 7, which can prevent the risk of displacement of the battery assembly 2 in the height direction of the battery pack and improve the overall reliability of the battery pack.

[0076] Among them, such as Figure 1 and Figure 2 As shown, a positioning structure can be provided on the inner wall surface of the cover 6 facing the rubber seal cover 7, and a positioning and mating structure 710 is provided on the outer wall surface of the rubber seal cover 7 facing the cover 6. The positioning structure and the positioning and mating structure 710 are used for positioning and mating. In this way, when the cover 6 is connected to the housing 1, it is easy to realize the positioning and installation of the cover 6 and the rubber seal cover 7, reduce the difficulty of on-site installation, and improve the assembly efficiency. At the same time, the positioning and mating structure 710 also help to improve the reliability of the entire battery pack.

[0077] For example, the above positioning structure may include one of a positioning groove and a positioning protrusion, and the positioning mating structure 710 may include the other of a positioning groove and a positioning protrusion. The purpose is to enable the positioning and installation of the cover 6 and the glue-proof cover 7 through the positioning and mating of the positioning structure and the positioning mating structure 710. Those skilled in the art can adapt the specific structure of the positioning structure and the positioning mating structure 710 according to the actual application requirements. This disclosure does not make specific limitations.

[0078] Additionally, in some implementations, references Figures 1 to 5 As shown, the battery assembly 2 may include a battery cell 210 and a busbar assembly 220 located above the battery cell 210. The cover 7 may be provided with a first socket 720 for the electrical connector 230 of the busbar assembly 220 to pass through, and the cover 6 may be provided with a second socket 610 for the electrical connector 230 of the busbar assembly 220 to pass through. In this way, by reserving the socket structure (e.g., a clearance hole or clearance groove) for the power connector 230 to pass through on the cover 7 and the cover 6, the battery module and the electrical module can be prevented from overlapping and interfering, so as to facilitate subsequent maintenance operations on the electrical components such as the electrical connector 230 in the battery pack.

[0079] Furthermore, in some implementations, references Figures 1 to 5 As shown, a maintenance cover 8 for covering the second socket 610 can be provided on the outer wall surface of the cover body 6 away from the rubber cover 7. The maintenance cover 8 provides protection, and the electrical module at the electrical connector 230 can be viewed and repaired after the maintenance cover 8 is removed, which improves the convenience of maintenance.

[0080] It should be noted that this disclosure does not specifically limit the structure of the bus assembly 220, the electrical connector 230, and the electrical module at the electrical connector 230. Those skilled in the art can design them adaptively according to actual application requirements.

[0081] In addition, the aforementioned adhesive-resistant cover 7 can be formed from part of the aforementioned insulating layer 5. For example, the adhesive-resistant cover 7 can be made of materials that do not have de-adhesive properties, such as polyimide (PI), polyurethane (PU), and polyamide (PA), thereby blocking the glue-filling structure 4 and the cover 6, so as to prevent the glue-filling structure 4 from being directly bonded to the cover 6, so as to facilitate the disassembly and assembly of the cover 6. Furthermore, since the adhesive-resistant cover 7 can be connected to the battery assembly 2 through the glue-filling structure 4, after the cover 6 is removed, the battery assembly 2, the glue-filling structure 4, and the adhesive-resistant cover 7 can be pulled out from the housing 1 as a whole, so as to replace the battery assembly 2.

[0082] Alternatively, in other embodiments, the aforementioned adhesive-blocking cover 7 can also be arranged independently of the isolation layer 5. For example, the adhesive-blocking cover 7 can be a metal cover or a plastic cover, which can also serve as a barrier between the potting structure 4 and the cover body 6, thereby preventing the potting structure 4 from being directly bonded to the cover body 6, so as to facilitate the disassembly and assembly of the cover body 6. This disclosure does not specifically limit such variations, and those skilled in the art can design them adaptively according to actual application needs.

[0083] In addition, when the inner side of the frame 130 is divided into multiple receiving slots 110 by the partition beam 140, it can be understood that when there are multiple receiving slots 110 in the housing 1, the number of adhesive-blocking covers 7 can be the same as the number of receiving slots 110 and arranged in a one-to-one correspondence. Alternatively, at least two receiving slots 110 can also have their opening sides 113 separated from the cover body 6 by an adhesive-blocking cover 7. This disclosure does not specifically limit such modifications. The purpose is to achieve the effect of blocking the glue-filling structure 4 and the cover body 6 by the adhesive-blocking cover 7, so as to prevent the glue-filling structure 4 from being directly bonded to the cover body 6, so that the cover body 6 can be easily disassembled and assembled.

[0084] According to a second aspect of this disclosure, an electrical appliance is provided, which includes the battery pack provided in the first aspect. Furthermore, the electrical appliance also possesses all the beneficial effects of the battery pack provided in the first aspect, which will not be elaborated further herein.

[0085] In some exemplary application scenarios, the aforementioned electrical equipment can be a vehicle, wherein the vehicle can be a new energy vehicle, which can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc., and this disclosure does not make any specific limitations in this regard.

[0086] Of course, in other application scenarios, the above-mentioned electrical equipment can also be used for vehicles that need to be powered by battery packs, such as in the field of energy storage, aerospace or water transportation.

[0087] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0088] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0089] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A battery pack, characterized in that, include: The casing has a receiving groove; A battery assembly is disposed within the receiving groove, and a gap exists between the battery assembly and at least a portion of the inner wall surface of the receiving groove; A potting structure, at least a portion of which is disposed within the gap; as well as An isolation layer, at least partially disposed between the inner wall of the receiving tank and the potting structure, is configured to be separable from the inner wall of the receiving tank and / or the potting structure.

2. The battery pack according to claim 1, characterized in that, The isolation layer is made of a high molecular polymer.

3. The battery pack according to claim 2, characterized in that, The polymer includes at least one of polytetrafluoroethylene, ultra-high molecular weight polyethylene, silicone rubber, and polyoxymethylene.

4. The battery pack according to any one of claims 1-3, characterized in that, The isolation layer is a coating applied to the inner wall of the receiving tank, or the isolation layer is an isolation membrane disposed between the receiving tank and the potting structure.

5. The battery pack according to claim 1, characterized in that, The isolation layer includes a bottom wall and a side wall. The side wall is arranged circumferentially around the bottom wall and is disposed on the side wall surface of the inner wall of the receiving groove. The bottom wall is disposed on the bottom wall surface of the inner wall of the receiving groove.

6. The battery pack according to claim 5, characterized in that, The bottom wall and the side wall are constructed as a single unit.

7. The battery pack according to claim 5, characterized in that, The number of the receiving slots is multiple, and the multiple bottom walls of the multiple isolation layers in the multiple receiving slots are constructed as a single unit.

8. The battery pack according to claim 5, characterized in that, The housing includes a base plate assembly, the bottom wall of the receiving groove is formed on the base plate assembly, the battery assembly includes a battery cell, the battery cell has a pressure relief member facing the base plate assembly, and the base plate assembly is provided with a pressure relief port opposite to the position of the pressure relief member. Wherein, the bottom wall is attached to the bottom plate assembly to cover the pressure relief port, and the bottom wall is configured to form a connection between the pressure relief port and the pressure relief component when the battery cell experiences thermal runaway; or, The bottom wall is connected to the bottom plate assembly to have a communication port connecting the pressure relief port and the pressure relief component.

9. The battery pack according to claim 8, characterized in that, The base plate assembly includes a first plate and a second plate arranged opposite to each other. The bottom wall of the receiving groove is formed on the first plate. The first plate is provided with the pressure relief port. An exhaust channel is formed between the first plate and the second plate. The exhaust channel is connected to the pressure relief port.

10. The battery pack according to claim 1, characterized in that, The battery pack also includes a cover connected to the housing, the cover being located on the opening side of the receiving slot.

11. The battery pack according to claim 10, characterized in that, The cover and the isolation layer are made of the same material.

12. The battery pack according to claim 10, characterized in that, An adhesive-blocking cover is provided between the cover and the battery assembly. The adhesive-blocking cover is connected to the battery assembly through the potting structure to block the gap between the potting structure and the cover.

13. The battery pack according to claim 12, characterized in that, The cover is configured to restrict the position of the battery assembly, the sealant cover, and a portion of the potting structure located between the sealant cover and the battery assembly in the height direction of the battery pack.

14. The battery pack according to claim 12, characterized in that, The cover body has a positioning structure on its inner wall facing the adhesive seal, and the adhesive seal has a positioning and fitting structure on its outer wall facing the cover body. The positioning structure and the positioning and fitting structure are used for positioning and fitting.

15. The battery pack according to claim 14, characterized in that, The positioning structure includes one of a positioning groove and a positioning protrusion, and the positioning mating structure includes the other of the positioning groove and the positioning protrusion.

16. The battery pack according to claim 12, characterized in that, The battery assembly includes individual battery cells and busbar assemblies; The rubber seal cover is provided with a first socket for the electrical connector of the busbar assembly to pass through, and the cover body is provided with a second socket for the electrical connector of the busbar assembly to pass through.

17. The battery pack according to claim 16, characterized in that, A maintenance cover for covering the second insertion port is provided on the outer wall surface of the cover body opposite to the rubber seal cover.

18. The battery pack according to any one of claims 12-17, characterized in that, The adhesive-resistant cover is formed from a portion of the insulating layer, or the adhesive-resistant cover is arranged independently of the insulating layer.

19. The battery pack according to any one of claims 12-17, characterized in that, The sealant cover can be a metal cover or a plastic cover.

20. The battery pack according to any one of claims 12-17, characterized in that, The number of the receiving slots is multiple; Wherein, the number of the adhesive-blocking covers is the same as the number of the receiving slots and they are arranged in a one-to-one correspondence; or, At least two of the receiving slots are separated from the cover by one of the adhesive-resistant caps.

21. The battery pack according to claim 1, characterized in that, The receiving groove is provided with a limiting structure, and the potting structure forms a limiting fit structure. The limiting structure and the limiting fit structure limit each other to restrict the position of the battery assembly relative to the receiving groove in a plane perpendicular to the height direction of the battery pack, and allow the battery assembly to move toward the opening side of the receiving groove in the height direction.

22. The battery pack according to claim 21, characterized in that, The limiting structure includes a first groove structure recessed into the inner wall surface of the receiving groove; the limiting mating structure includes a first protrusion structure that inserts into the first groove structure; and / or, The limiting structure includes a second protrusion structure that protrudes outward from the inner wall of the receiving groove, and the limiting mating structure includes a second groove structure that is inserted and mated with the second protrusion structure.

23. The battery pack according to claim 22, characterized in that, The first groove structure and / or the second protrusion structure extend along the height direction, and one end near the opening side of the receiving groove is flush with the opening side of the receiving groove.

24. The battery pack according to claim 21, characterized in that, The limiting structure and the limiting mating structure are arranged in multiple circumferentially around the opening side of the receiving groove.

25. The battery pack according to any one of claims 21-24, characterized in that, The potting structure is formed using foamed adhesive and / or non-foamed adhesive.

26. The battery pack according to claim 1, characterized in that, The housing includes a base plate assembly, a frame, and a partition beam. The frame is arranged circumferentially around the base plate assembly, and the inner side of the frame is divided into at least two receiving slots by the partition beam.

27. An electrical appliance, characterized in that, Includes the battery pack described in any one of claims 1-26.

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