Liquid-cooled battery pack

Abstract

The utility model relates to battery liquid cooling technical field, concretely refers to a kind of liquid-cooled battery PACK, including PACK battery shell and the butt joint top cover of movable sleeve connection on the PACK battery shell top outside surface, the butt joint base of movable sleeve connection on the PACK battery shell inner side wall surface, battery pack of movable sleeve connection on the butt joint base inner side wall surface and the butt joint top cover top inner side wall surface, the inner side wall surface of PACK battery shell is provided with the inner container sleeve shell of movable sleeve connection on the butt joint base and battery pack outside surface.Simultaneously cooperate the low-temperature cooling water inside the water guide cavity between PACK battery shell and inner container sleeve shell to carry out cooling treatment to the inner side wall surface of inner container sleeve shell, so that the inner side wall surface of inner container sleeve shell is in low-temperature state, and the low-temperature cooling water inside water guide cavity will be through and communicate with the hollow water guide pipe inside water guide cavity inside to make cooling water enter the inside of hollow water guide pipe.

Description

Technical Field

[0001] This utility model relates to the field of battery liquid cooling technology, and in particular to a liquid-cooled battery pack. Background Technology

[0002] In lithium battery energy storage devices, the battery box is stored as a small energy storage unit in the battery rack of the energy storage device. The storage density is relatively high, and lithium batteries generate a lot of heat during charging and discharging. This heat must be dissipated from the energy storage device in a timely manner, otherwise it is easy to cause heat accumulation, which may lead to battery failure or safety accidents. Liquid-cooled battery PACK is a battery module that uses liquid cooling technology to manage battery temperature. This design can effectively control the heat generated by the battery during charging and discharging, ensure that the battery operates at a reasonable ambient temperature, and improve the battery's cycle life.

[0003] A patent with publication number CN 217641522 U discloses a liquid-cooled battery pack for the field of battery technology. It includes a housing, end caps, and a base plate. A battery module is housed within the housing. The base plate is located on the lower side of the housing, and the end caps are located on the upper side. The base plate is a liquid-cooled plate with a cooling chamber filled with coolant. The liquid-cooled plate has an inlet and an outlet. The battery module is attached to the liquid-cooled plate. The coolant enters the cooling chamber through the inlet, flows through the cooling chamber, and exchanges heat with the battery module via the liquid-cooled plate, reducing the battery module's temperature. The coolant then flows out through the outlet. By using a liquid-cooled plate as the base plate and cooling the battery module with coolant, the liquid-cooled battery pack can significantly reduce the battery module's temperature, ensuring normal power output.

[0004] In summer, some battery-powered devices operate for extended periods, generating high temperatures. Combined with the corrosive effects of outdoor heat, this causes simultaneous internal and external heating of the battery. High temperatures accelerate battery aging, degrade the performance of the electrolyte and electrode materials, increase internal resistance, and affect charging and discharging efficiency. Current battery systems use liquid cooling to cool the internal components. The liquid cooling plate has internal channels where coolant circulates, absorbing and dissipating heat from the battery pack. However, liquid cooling has a limited cooling range and can only effectively cool distant heat sources, leaving a significant amount of heat inside the battery. Traditional heat absorption methods only absorb heat from the vicinity of the vent, failing to effectively absorb heat from more distant sources. Utility Model Content

[0005] Therefore, the technical problem to be solved by this utility model is to overcome the fact that the cooling range of liquid cooling in the prior art is relatively small, and the number of heat sources that can be contacted is relatively small. It cannot effectively cool some heat sources that are far away, and a large amount of heat will still accumulate inside the battery. Traditional heat absorption can only absorb the heat around the air outlet and cannot effectively absorb heat sources that are far away.

[0006] To solve the above-mentioned technical problems, this utility model provides a liquid-cooled battery PACK, including a PACK battery shell and a docking top cover movably fitted onto the outer surface of the top of the PACK battery shell, a docking base movably fitted onto the inner wall of the PACK battery shell, a battery pack movably fitted onto the inner wall of the docking base and the inner wall of the top of the docking top cover, and a sealing partition shell detachably mounted on the outer surface of the PACK battery shell. An inner liner shell movably fitted onto the outer wall of the PACK battery shell and the outer surface of the battery pack is provided on the inner wall of the PACK battery shell. A water-guiding cavity is provided between the cavity of the PACK battery shell and the inner liner shell. A baffle strip is fixedly connected to the inner wall of the water-guiding cavity. A hollow water-guiding pipe extending into the inner wall of the water-guiding cavity is fixedly connected to the inner wall of the inner liner shell at its bottom edge. Water-permeable holes are opened on the outer surface of the PACK battery shell and are located on the inner wall of the sealing partition shell. A water pump is fixedly installed on the outer surface of the sealing partition shell.

[0007] In one embodiment of the present invention, a limiting groove is provided on the outer surface of the docking base and is movably sleeved on the inner wall of the connecting groove. A swinging flexible plate is fixedly connected to the top surface of the docking base and located at the two side edges, and is movably overlapped on the outer surface of the battery pack.

[0008] In one embodiment of the present invention, a docking buckle is fixedly connected to the inner wall of the swinging flexible plate, and a shim strip is fixedly connected to the bottom inner wall of the docking base.

[0009] In one embodiment of the present invention, triangular grooves are provided on the bottom edges of both sides of the docking base and on the edges of both sides of the shim strip, and the inner wall of the triangular grooves is movably fitted onto the outer surface of the hollow water pipe.

[0010] In one embodiment of the present invention, an exhaust hole is provided on the outer surface of the water pump and at the top edge position, and air guide pipes are fixedly connected to both sides of the water pump and on the inner wall of the exhaust hole.

[0011] In one embodiment of the present invention, a docking sleeve is movably sleeved on the outer surface of the PACK battery case and the docking top cover, and a sealing soft plate that is elastically sealed to the inner wall of the PACK battery case and the inner sleeve is fixedly connected to the outer surface of the docking sleeve.

[0012] In one embodiment of the present invention, a battery pack plug is provided on the inner wall of the docking sleeve, and an air pump is fixedly connected to one end of the air duct on the outer surface of the docking sleeve and at the two side edges of the battery pack plug.

[0013] In one embodiment of the present invention, a rectangular limiting groove is provided on the bottom surface of the docking top cover, which is movably fitted onto the outer surface of the top of the battery pack, and a docking sealing strip is provided on the bottom surface of the docking top cover at the edge position, which is movably fitted onto the inner wall of the docking groove.

[0014] In one embodiment of the present invention, a snap-fit ​​groove is provided on the outer surface of the battery pack, and the outer surface of the docking buckle is movably sleeved on the inner wall of the snap-fit ​​groove.

[0015] In one embodiment of the present invention, the inner sleeve and the PACK battery shell are provided with mating grooves on the top inner sidewalls, and the inner sleeve is provided with connecting grooves on the inner sidewalls.

[0016] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0017] This utility model describes a liquid-cooled battery pack. Simultaneously, low-temperature cooling water within the water-conducting cavity between the battery casing and the inner liner cools the inner wall of the inner liner, keeping it at a low temperature. The low-temperature cooling water within the water-conducting cavity passes through a hollow water-conducting pipe connected to the cavity, ensuring the water enters the pipe and its surface remains at a low temperature. This low-temperature water-conducting pipe then penetrates the cavity inside the docking base. The low surface temperature rapidly absorbs heat generated by the bottom surface of the battery pack. Furthermore, a partition strip within the water-conducting cavity divides the cavity into two... An independent cavity is used, and a water pump absorbs water from the inside of the sealed partition shell. The water in the water-conducting cavity enters the sealed partition shell through the water-permeable holes. When the water in the water-conducting cavity flows, it moves the water inside the water-conducting cavity and the hollow water-conducting pipe at the same time. After absorbing the heat source, the water is guided into the sealed partition shell. At the same time, the water pump cools the water and pours the cooled water into the inside of another sealed partition shell. As the water accumulates inside the sealed partition shell and the water-conducting cavity, it pushes the water inside the other end of the hollow water-conducting pipe, keeping the surface of the hollow water-conducting pipe at a low temperature. The low temperature can accelerate the heat interaction between the heat source and the low temperature.

[0018] This utility model describes a liquid-cooled battery pack. The battery pack is snapped into the docking base, and a flexible swing plate on the outer surface of the battery pack adheres to it. Simultaneously, docking clips on the outer surface of the swing plate engage with the inner wall of the docking groove. A shim on the inner wall of the docking base elevates and limits the position of the battery pack, creating a cavity gap between the battery pack and the bottom layer of the docking base. This allows heat from the bottom surface of the battery pack to accumulate in the elevated cavity within the docking base, where it is then released. Furthermore, when the docking base is placed inside the inner casing, a limiting groove on the outer surface of the docking base engages with the inner wall of the connecting groove. When multiple limiting grooves on the outer surfaces of the docking bases are interlocked, the docking bases are firmly positioned against the inner wall of the inner casing. This increases the stability of the docking base during transport, preventing excessive shaking, and makes subsequent retrieval of the battery pack quicker and easier. Attached Figure Description

[0019] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0020] Figure 1 This is a perspective view of the present invention;

[0021] Figure 2 This is a perspective view of the PACK battery casing in this utility model;

[0022] Figure 3 This is a partial cross-sectional perspective view of the PACK battery casing in this utility model;

[0023] Figure 4 This is a perspective view of the sealing partition sleeve in this utility model;

[0024] Figure 5 This is a perspective view of the docking base in this utility model;

[0025] Figure 6 This is a partial three-dimensional view of the docking base in this utility model;

[0026] Figure 7 This is a perspective view of the docking top cover in this utility model;

[0027] Explanation of reference numerals in the instruction manual's attached drawings: 11. PACK battery casing; 111. Inner liner casing; 112. Water guiding cavity; 113. Divider strip; 114. Hollow water guiding pipe; 115. Docking groove; 116. Connecting groove; 117. Water permeable hole; 12. Docking base; 121. Limiting groove; 122. Swinging flexible plate; 123. Docking buckle; 124. Elevating strip; 13. Battery pack; 131. Snap-fit ​​groove; 14. Sealing divider casing; 141. Water pump; 142. Air guide pipe; 143. Vent hole; 144. Docking casing; 145. Sealing flexible plate; 146. Battery pack plug; 147. Air pump; 15. Docking top cover; 151. Docking sealing strip; 152. Rectangular limiting groove. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0029] Reference Figure 1 - Figure 7As shown, this utility model discloses a liquid-cooled battery pack, including a battery case 11, a docking top cover 15 movably fitted onto the outer surface of the top of the battery case 11, a docking base 12 movably fitted onto the inner wall of the battery case 11, a battery pack 13 movably fitted onto the inner wall of the docking base 12 and the inner wall of the top of the docking top cover 15, and a sealing partition sleeve 14 detachably mounted on the outer surface of the battery case 11. The inner wall of the battery case 11 is provided with a part movably fitted onto the docking base 12 and the outer side of the battery pack 13. A water-guiding cavity 112 is provided between the inner liner shell 111 on the surface and the cavity between the PACK battery shell 11 and the inner liner shell 111. A baffle strip 113 is fixedly connected to the inner wall of the water-guiding cavity 112. A hollow water-guiding pipe 114 extending into the inner wall of the water-guiding cavity 112 is fixedly connected to the inner wall of the inner liner shell 111 at the bottom edge. A water-permeable hole 117 is provided on the outer surface of the PACK battery shell 11, which is located on the inner wall of the sealing baffle shell 14. A water pump 141 is fixedly installed on the outer surface of the sealing baffle shell 14.

[0030] Simultaneously, the low-temperature cooling water inside the water-conducting cavity 112 between the PACK battery casing 11 and the inner liner casing 111 cools the inner wall of the inner liner casing 111, keeping it at a low temperature. The low-temperature cooling water inside the water-conducting cavity 112 passes through the hollow water-conducting pipe 114 connected to the inside of the water-conducting cavity 112, allowing cooling water to enter the interior of the hollow water-conducting pipe 114. This keeps the surface of the hollow water-conducting pipe 114 at a constant low temperature. The low-temperature hollow water-conducting pipe 114 then penetrates the cavity inside the docking base 12, where its low surface temperature quickly absorbs the heat generated by the bottom surface of the battery pack 13. Furthermore, the partition strip 113 inside the water-conducting cavity 112 divides the cavity into two independent cavities. Water is drawn into the sealed partition shell 14 by the water pump 141, causing the water in the water-conducting cavity 112 to pass through the water-permeable hole 117 and enter the sealed partition shell 14. When the water in the water-conducting cavity 112 flows, it will drive the water in the water-conducting cavity 112 and the hollow water-conducting pipe 114 to move simultaneously, guiding the water after absorbing the heat source into the sealed partition shell 14. At the same time, the water pump 141 cools the water and pours the cooled water into the other sealed partition shell 14. As the water accumulates in the sealed partition shell 14 and the water-conducting cavity 112, it pushes the water in the other end of the hollow water-conducting pipe 114, keeping the surface of the hollow water-conducting pipe 114 at a low temperature. The low temperature can accelerate the heat interaction between the heat source and the low temperature.

[0031] Reference Figure 1 , Figure 5 and Figure 7 As shown, in one embodiment of the present invention, a rectangular limiting groove 152 is provided on the bottom surface of the docking top cover 15, which is movably sleeved on the outer surface of the top of the battery pack 13, and a docking sealing strip 151 is provided on the bottom surface of the docking top cover 15 and at the edge position, which is movably sleeved on the inner wall of the docking groove 115.

[0032] After assembling the battery pack 13, the docking top cover 15 is fitted onto the top surface of the PACK battery case 11. The rectangular limiting groove 152 on the inner side wall of the top of the docking top cover 15 is fitted onto the top surface of the battery pack 13. The rectangular limiting groove 152 and the docking base 12 limit the positions of the upper and lower ends of the battery pack 13. At the same time, the docking sealing strip 151 on the bottom surface of the docking base 12 is fitted onto the inner side wall of the docking groove 115, so that the inside of the inner shell 111 is in a semi-closed state. When the fan absorbs gas inside the inner shell 111, it can greatly draw air into the semi-closed cavity, increase the blowing efficiency of the heat source, and prevent the absorption of excess gas.

[0033] Reference Figure 1 - Figure 7As shown, in one embodiment of this utility model, a limiting groove 121 is provided on the outer surface of the docking base 12, which is movably fitted onto the inner wall of the connecting groove 116. A swinging flexible plate 122 is fixedly connected to the top surface of the docking base 12 and located at the two side edges, which is movably overlapped on the outer surface of the battery pack 13. A docking buckle 123 is fixedly connected to the inner wall of the swinging flexible plate 122. A shim strip 124 is fixedly connected to the bottom inner wall of the docking base 12. A triangular groove is provided at the bottom two sides of the docking base 12 and at the two side edges of the shim strip 124. The inner wall of the triangular groove is movably fitted onto the outer surface of the hollow water pipe 114. An exhaust hole 143 is provided on the outer surface of the water pump 141 and located at the top edge. A shim strip 143 is fixedly connected to the inner wall of the exhaust hole 143 on both sides of the water pump 141. A vent pipe 142 is connected to a docking sleeve 144 that is movably fitted onto the outer surface of the PACK battery case 11 and the docking top cover 15. A sealing soft plate 145 that is elastically sealed to the inner wall of the PACK battery case 11 and the inner sleeve 111 is fixedly connected to the outer surface of the docking sleeve 144. A battery plug 146 is provided on the inner wall of the docking sleeve 144. A vacuum pump 147 that is fixedly connected to one end of the vent pipe 142 is provided on the outer surface of the docking sleeve 144 and located at the two edges of the battery plug 146. A snap-fit ​​groove 131 is opened on the outer surface of the battery pack 13, and the outer surface of the docking buckle 123 is movably fitted onto the inner wall of the snap-fit ​​groove 131. A docking groove 115 is opened on the top inner wall of the inner sleeve 111 and the PACK battery case 11, and a connecting groove 116 is opened on the inner wall of the inner sleeve 111.

[0034] The battery pack 13 is inserted into the docking base 12. The swinging flexible plate 122 on the outer surface of the battery pack 13 adheres to the outer surface of the battery pack 13. Simultaneously, the docking buckle 123 on the outer surface of the swinging flexible plate 122 is fitted onto the inner wall of the docking groove 131. The shim strip 124 on the inner wall of the docking base 12 elevates and limits the position of the battery pack 13, leaving a certain cavity gap between the battery pack 13 and the bottom layer of the docking base 12. This allows heat from the bottom surface of the battery pack 13 to accumulate in the elevated cavity inside the docking base 12, where the accumulated heat is released. Furthermore, when the docking base 12 is placed inside the inner shell 111, the limiting groove 121 on the outer surface of the docking base 12 can fit onto the inner wall of the connecting groove 116. Multiple docking bases 12... When the limiting grooves 121 on the surface are aligned with each other, the docking base 12 can be firmly positioned on the inner wall of the inner shell 111. This increases the stability of the docking base 12 after it is positioned during the transportation of the battery pack 13, preventing excessive shaking. It also makes it easier and faster to retrieve the battery pack 13 later. This avoids the problem of traditional battery pack positioning using screws or sealant. Screws can loosen or fall off over time, causing the battery pack to shift. Regular inspection and tightening are also necessary. Exposed screws can affect the product's appearance. Once the sealant is applied, it is difficult to remove. If the battery pack needs repair or replacement, the sealant connection may need to be broken, which may damage the battery pack or render it unusable. The curing time of the sealant may also affect production efficiency.

[0035] Working principle: The battery pack 13 is inserted into the docking base 12. The swinging flexible plate 122 on the outer surface of the battery pack 13 adheres to the outer surface of the battery pack 13. Simultaneously, the docking buckle 123 on the outer surface of the swinging flexible plate 122 is fitted onto the inner wall of the docking groove 131. The shim strip 124 on the inner wall of the docking base 12 elevates and limits the position of the battery pack 13, leaving a certain cavity gap between the battery pack 13 and the bottom layer of the docking base 12. This allows heat from the bottom surface of the battery pack 13 to accumulate in the elevated cavity inside the docking base 12, where the accumulated heat is released. Furthermore, when the docking base 12 is placed inside the inner shell 111, the limiting groove 121 on the outer surface of the docking base 12 fits onto the inner wall of the connecting groove 116. When multiple limiting grooves 121 on the outer surfaces of the docking bases 12 are joined together, the docking base 12 is firmly secured. The positioning of the docking base 12 on the inner wall of the inner shell 111 increases the stability of the battery pack 13 during transportation, preventing excessive shaking. It also makes it easier and faster to retrieve the battery pack 13 later. After assembling the battery pack 13, the docking top cover 15 is fitted onto the top surface of the PACK battery shell 11. The rectangular limiting groove 152 on the inner wall of the top of the docking top cover 15 is fitted onto the top surface of the battery pack 13. The rectangular limiting groove 152 and the docking base 12 limit the positions of the upper and lower ends of the battery pack 13. At the same time, the docking sealing strip 151 on the bottom surface of the docking base 12 is fitted onto the inner wall of the docking groove 115, so that the interior of the inner shell 111 is in a semi-closed state. When the fan absorbs gas inside the inner shell 111, it can greatly draw air into the semi-closed cavity, increase the blowing efficiency of the heat source, and prevent the absorption of excess gas.Simultaneously, the low-temperature cooling water inside the water-conducting cavity 112 between the PACK battery casing 11 and the inner liner casing 111 cools the inner wall of the inner liner casing 111, keeping it at a low temperature. The low-temperature cooling water inside the water-conducting cavity 112 passes through the hollow water-conducting pipe 114 connected to the inside of the water-conducting cavity 112, allowing cooling water to enter the interior of the hollow water-conducting pipe 114. This keeps the surface of the hollow water-conducting pipe 114 at a constant low temperature. The low-temperature hollow water-conducting pipe 114 then penetrates the cavity inside the docking base 12, where its low surface temperature quickly absorbs the heat generated by the bottom surface of the battery pack 13. Furthermore, the partition strip 113 inside the water-conducting cavity 112 divides the cavity into two independent cavities. Water is drawn into the sealed partition shell 14 by a water pump 141, causing water from the water-conducting cavity 112 to pass through the permeable hole 117 and enter the sealed partition shell 14. As the water flows through the water-conducting cavity 112, it moves the water inside both the water-conducting cavity 112 and the hollow water-conducting pipe 114, guiding the water, after absorbing the heat source, into the sealed partition shell 14. Simultaneously, the water pump 141 cools the water, and the cooled water is then pumped into another sealed partition shell 14. As water accumulates inside the sealed partition shell 14 and the water-conducting cavity 112, it pushes the water inside the other end of the hollow water-conducting pipe 114, keeping the surface of the hollow water-conducting pipe 114 at a consistently low temperature. This low temperature accelerates the heat exchange between the heat source and the low temperature.

[0036] Obviously, the above embodiments are merely illustrative examples for clarity and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A liquid-cooled battery PACK, comprising a PACK battery shell (11) and a docking top cover (15) movably sleeved on the outer surface of the top of the PACK battery shell (11), a docking base (12) movably sleeved on the inner surface of the PACK battery shell (11), a battery pack (13) movably sleeved on the inner surface of the docking base (12) and the inner surface of the top of the docking top cover (15), and a sealing barrier sleeve (14) detachably mounted on the outer surface of the PACK battery shell (11), characterized in that: The inner wall of the PACK battery case (11) is provided with an inner liner shell (111) that is movably fitted onto the docking base (12) and the outer surface of the battery pack (13). A water-guiding cavity (112) is provided between the cavity between the PACK battery case (11) and the inner liner shell (111). A baffle strip (113) is fixedly connected to the inner wall of the water-guiding cavity (112). A hollow water-guiding pipe (114) extending into the inner wall of the water-guiding cavity (112) is fixedly connected to the inner wall of the inner liner shell (111) at the bottom edge. A water-permeable hole (117) is provided on the outer surface of the PACK battery case (11) and is provided on the inner wall of the sealing baffle shell (14). A water pump (141) is fixedly installed on the outer surface of the sealing baffle shell (14). ​ 2. The liquid-cooled battery PACK according to claim 1, characterized in that: The outer surface of the docking base (12) is provided with a limiting groove (121) that is movably sleeved on the inner wall of the connecting groove (116). The top surface of the docking base (12) and the two side edges are fixedly connected with a swinging flexible plate (122) that is movably overlapped on the outer surface of the battery pack (13).

3. The liquid-cooled battery PACK of claim 2, wherein: A docking buckle (123) is fixedly connected to the inner wall of the swinging soft plate (122), and a shim strip (124) is fixedly connected to the bottom inner wall of the docking base (12).

4. The liquid-cooled battery PACK of claim 3, wherein: The bottom edges of the docking base (12) on both sides and the edges of the padding strip (124) are provided with triangular grooves, and the inner wall of the triangular grooves is movably sleeved on the outer surface of the hollow water pipe (114).

5. The liquid-cooled battery PACK of claim 1, wherein: An exhaust hole (143) is provided on the outer surface of the water pump (141) and at the top edge. Air guide pipes (142) are fixedly connected to both sides of the water pump (141) and on the inner wall of the exhaust hole (143).

6. The liquid-cooled battery PACK of claim 1, wherein: A docking sleeve (144) is movably sleeved on the outer surface of the PACK battery case (11) and the docking top cover (15). A sealing soft plate (145) is fixedly connected to the outer surface of the docking sleeve (144) and is elastically sealed on the inner wall of the PACK battery case (11) and the inner liner case (111).

7. The liquid-cooled battery PACK of claim 6, wherein: A battery pack plug (146) is provided on the inner wall of the docking sleeve (144), and an air pump (147) is fixedly connected to one end of the air duct (142) on the outer surface of the docking sleeve (144) and at the two sides of the battery pack plug (146).

8. The liquid-cooled battery PACK of claim 1, wherein: The bottom surface of the docking top cover (15) is provided with a rectangular limiting groove (152) that is movably sleeved on the outer surface of the top of the battery pack (13), and the bottom surface of the docking top cover (15) and the edge position are provided with a docking sealing strip (151) that is movably sleeved on the inner wall of the docking groove (115).

9. The liquid-cooled battery PACK of claim 3, wherein: The outer surface of the battery pack (13) is provided with a snap-fit ​​groove (131), and the outer surface of the docking buckle (123) is movably sleeved on the inner wall of the snap-fit ​​groove (131).

10. The liquid-cooled battery PACK of claim 1, wherein: The inner container sleeve shell (111) and the top inner side wall surface of the PACK battery shell (11) are provided with a butt joint groove (115), and the inner side wall surface of the inner container sleeve shell (111) is provided with a link groove (116).

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