Battery liquid cooling system and vehicle having the battery liquid cooling system

Abstract

The present invention is applicable to the field of battery cooling technology, and discloses a battery liquid cooling system and a vehicle having the battery liquid cooling system. The battery liquid cooling system includes a first liquid cooling plate connected to a battery module and a second liquid cooling plate sandwiched between two battery modules, the first liquid cooling plate and the second liquid cooling plate are both provided with a liquid inlet and a liquid outlet, the first liquid cooling plate and the second liquid cooling plate are internally provided with independent circulation channels whose two ends are respectively connected to the liquid inlet and the liquid outlet, and the liquid inlet and the liquid outlet of the first liquid cooling plate and the liquid inlet and the liquid outlet of the second liquid cooling plate are connected in parallel. The vehicle has the above-mentioned battery liquid cooling system. The battery liquid cooling system and the vehicle having the battery liquid cooling system provided by the present invention have good temperature consistency of the battery module, which is conducive to ensuring the normal use of the battery module.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery cooling, and in particular relates to a battery liquid cooling system and a vehicle having the battery liquid cooling system. Background Art

[0002] At present, the batteries in electric vehicles generally have a liquid cooling system. For example, the liquid cooling system used for the front row is a single-layer battery module and the rear row is a double-layer battery module. It is generally designed with an upper and lower layer of liquid cooling plates. The temperature of the coolant in the liquid cooling plates will affect each other, and the temperature consistency of the entire battery pack is poor. Summary of the invention

[0003] The present invention aims to solve at least one of the above-mentioned technical problems, and provides a battery liquid cooling system and a vehicle having the battery liquid cooling system, which have good cooling effect and good temperature consistency of the entire battery pack.

[0004] The technical solution of the present invention is: a battery liquid cooling system, comprising a first liquid cooling plate connected to a battery module and a second liquid cooling plate sandwiched between two battery modules, the first liquid cooling plate and the second liquid cooling plate are both provided with a liquid inlet and a liquid outlet, the first liquid cooling plate and the second liquid cooling plate are internally provided with independent circulation channels whose two ends are respectively connected to the liquid inlet and the liquid outlet, the liquid inlet and the liquid outlet of the first liquid cooling plate and the liquid inlet and the liquid outlet of the second liquid cooling plate are connected in parallel.

[0005] Optionally, the battery module includes a plurality of battery cells arranged adjacent to each other, and the independent circulation channel passes through areas close to both ends of the plurality of battery cells.

[0006] Optionally, the liquid inlet and the liquid outlet of the first liquid cooling plate are adjacently arranged on one side of the first liquid cooling plate and separated from each other, and the independent circulation channel is arranged from the liquid inlet along an edge close to the first liquid cooling plate to the liquid outlet.

[0007] Optionally, both ends of the battery cell have poles, the independent circulation channel includes a liquid inlet section connected to the liquid inlet at one end and a liquid outlet section connected to the liquid outlet at the other end, and the circulation path also includes a middle section connected to the liquid inlet section and the liquid outlet section at both ends respectively, the liquid inlet section and the liquid outlet section are close to one end of the battery module, and the middle section is close to the other end of the battery module.

[0008] Optionally, the battery liquid cooling system has a liquid inlet joint and a liquid outlet joint, the liquid inlet joint is connected to the liquid inlet of the first liquid cooling plate through a first liquid inlet pipe, and the liquid outlet joint is connected to the liquid outlet of the first liquid cooling plate through a first liquid outlet pipe;

[0009] The second liquid cooling plate is provided with one, the liquid inlet of the second liquid cooling plate is connected to the first liquid inlet pipe or the liquid inlet joint through the second liquid inlet pipe, and the liquid outlet of the second liquid cooling plate is connected to the first liquid outlet pipe or the liquid outlet joint through the second liquid outlet pipe; or, the second liquid cooling plate is provided with at least two, the liquid inlet of one of the second liquid cooling plates is connected to the first liquid inlet pipe or the liquid inlet joint through the second liquid inlet pipe, and the liquid outlet of the second liquid cooling plate is connected to the first liquid outlet pipe or the liquid outlet joint through the second liquid outlet pipe, and the liquid inlets and liquid outlets of the remaining second liquid cooling plates are respectively connected to the second liquid inlet pipe and the second liquid outlet pipe of the adjacent second liquid cooling plate through connecting branches.

[0010] Optionally, the battery liquid cooling system has a liquid inlet joint and a liquid outlet joint, the liquid inlet joint is connected to the liquid inlet of the first liquid cooling plate through a first liquid inlet pipe, and the liquid outlet joint is connected to the liquid outlet of the first liquid cooling plate through a first liquid outlet pipe;

[0011] The second liquid cooling plate includes a first rear row liquid cooling plate and a second rear row liquid cooling plate, the liquid inlet of the first rear row liquid cooling plate is connected to the first liquid inlet pipe or liquid inlet joint through a second liquid inlet pipe, and the liquid outlet of the second rear row liquid cooling plate is connected to the first liquid outlet pipe or liquid outlet joint through a second liquid outlet pipe; the liquid outlet of the first rear row liquid cooling plate is connected to the second liquid outlet pipe through a first connecting branch pipe, and the liquid inlet of the second rear row liquid cooling plate is connected to the first liquid inlet pipe through a second connecting branch pipe.

[0012] Optionally, a plurality of diverter spoiler columns are arranged in the independent circulation channel of the first liquid cooling plate, and adjacent diverter spoiler columns are staggered along the flow direction of the coolant of the first liquid cooling plate; and / or a plurality of diverter spoiler columns are arranged in the independent circulation channel of the second liquid cooling plate, and adjacent diverter spoiler columns are staggered along the flow direction of the coolant of the second liquid cooling plate.

[0013] Optionally, flow channel fins are provided in the independent circulation channels of the second liquid cooling plate and / or the first liquid cooling plate.

[0014] Optionally, the flow channel fin has at least two fins which are arranged at intervals and along the independent circulation channel.

[0015] Optionally, the second liquid cooling plate and / or the first liquid cooling plate include an upper cover and a lower cover that are matched with each other, the flow channel fin is stamped and welded to the upper cover or the lower cover, and the upper and lower ends of the flow channel fin are respectively connected to the upper cover and the lower cover.

[0016] Optionally, the upper cover and / or the lower cover are stamped with a guide wall, and the guide wall is located between the liquid inlet and the inlet end of the flow channel fin, and / or the guide wall is located between the liquid outlet and the outlet end of the flow channel fin.

[0017] Optionally, a planar hanging suction cup adsorption area is provided in the middle of the first liquid cooling plate, and an independent circulation channel of the first liquid cooling plate is provided around the hanging suction cup adsorption area.

[0018] Optionally, a stamping groove is provided on one side of the first liquid cooling plate, and the bottom of the stamping groove is the adsorption area of ​​the lifting suction cup.

[0019] Optionally, the first liquid cooling plate is arranged on the top of the front battery module, and reinforced connecting parts are arranged on both sides of the first liquid cooling plate, and the reinforced connecting parts are fixedly connected to the end plates at both ends of the front battery module through a fixing structure.

[0020] Optionally, the reinforced connection portion is a bent portion integrally formed on both sides of the first liquid cooling plate and attached to the outer side of the end plate, and the fixing structure is a rivet connected to the bent portion and the end plate.

[0021] Optionally, the second liquid cooling plate is provided with an upper pull-up plate connecting portion and a lower pull-up plate connecting portion, the upper pull-up plate connecting portion is fixedly connected to the end plate of the upper battery module through an upper locking piece, and the lower pull-up plate connecting portion is fixedly connected to the end plate of the lower battery module through a lower locking piece.

[0022] Optionally, the second liquid cooling plate has a glue-coated surface and a limiting surface for contacting the battery module, thermal conductive glue is arranged between the glue-coated surface and the battery module, and the glue-coated surface and the limiting surface have a height difference for accommodating the thermal conductive glue.

[0023] Optionally, the second liquid cooling plate includes an upper cover and a lower cover, the upper end surface of the upper cover and the lower end surface of the lower end are the glued surfaces; upper limit plates are integrally connected to both sides of the upper cover, lower limit plates are integrally connected to both sides of the lower end surface of the lower cover, the upper end surface of the upper limit plate and the lower end surface of the lower limit plate are the lower limit surfaces; a supporting structure is arranged between the upper limit plate and / or the lower limit plate.

[0024] Optionally, the support structure includes a first protrusion integrally stamped and formed on the upper limit plate and in contact with the lower limit plate and / or a second protrusion integrally stamped and formed on the lower limit plate and in contact with the upper limit plate.

[0025] Optionally, the upper pull-up plate connecting portion is integrally formed at both ends of the upper limit plate, and the upper pull-up plate connecting portion is longitudinally bent upward relative to the upper limit plate; the lower pull-down plate connecting portion is integrally formed at both ends of the lower limit plate, and the lower pull-down plate connecting portion is longitudinally bent downward relative to the lower limit plate; the upper locking member and the lower locking member are rivets.

[0026] The present invention also provides a vehicle, wherein the vehicle has the above-mentioned battery liquid cooling system.

[0027] The battery liquid cooling system and the vehicle having the battery liquid cooling system provided by the present invention have good temperature consistency of the battery module, which is beneficial to ensuring the normal use of the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 is a three-dimensional exploded schematic diagram of a battery liquid cooling system provided by an embodiment of the present invention;

[0030] Figure 2 It is a three-dimensional assembly schematic diagram of a battery liquid cooling system provided by an embodiment of the present invention after removing the battery module;

[0031] Figure 3 is a three-dimensional schematic diagram of a first liquid cooling plate in a battery liquid cooling system provided by an embodiment of the present invention;

[0032] Figure 4 It is a three-dimensional assembly diagram of a first liquid cooling plate and a front-row battery module in a battery liquid cooling system provided by an embodiment of the present invention;

[0033] Figure 5 is a three-dimensional schematic diagram of a second liquid cooling plate in a battery liquid cooling system provided by an embodiment of the present invention;

[0034] Figure 6 It is a three-dimensional assembly diagram of a second liquid cooling plate and a rear battery module in a battery liquid cooling system provided by an embodiment of the present invention;

[0035] Figure 7 It is a three-dimensional assembly diagram of a first liquid cooling plate and a front-row battery module in a battery liquid cooling system provided by an embodiment of the present invention;

[0036] Figure 8It is a three-dimensional exploded schematic diagram of a first liquid cooling plate and a front-row battery module in a battery liquid cooling system provided by an embodiment of the present invention;

[0037] Fig. 9 It is a three-dimensional exploded schematic diagram of a second liquid cooling plate and a rear battery module in a battery liquid cooling system provided by an embodiment of the present invention;

[0038] Fig.10 is a three-dimensional schematic diagram from another angle of a second liquid cooling plate in a battery liquid cooling system provided by an embodiment of the present invention;

[0039] Fig.11 is a three-dimensional schematic diagram from another angle of a second liquid cooling plate in a battery liquid cooling system provided by an embodiment of the present invention;

[0040] Fig.12 is a three-dimensional exploded schematic diagram of a second liquid cooling plate in a battery liquid cooling system provided by an embodiment of the present invention;

[0041] Fig.13 is a partial three-dimensional schematic diagram of a second liquid cooling plate in a battery liquid cooling system provided by an embodiment of the present invention;

[0042] Fig.14 It is a partial plan view of a second liquid cooling plate in a battery liquid cooling system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0044] It should be noted that the terms “setting” and “connection” should be understood in a broad sense. For example, it can be directly setting or connecting, or it can be indirectly setting or connecting through a central component or a central structure.

[0045] In addition, in the embodiments of the present invention, if there are terms indicating orientation or positional relationships such as "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., they are based on the orientation or positional relationships or conventional placement states or usage states shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structure, feature, device or element referred to must have a specific orientation or positional relationship, nor must it be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0046] The various specific technical features and embodiments described in the specific implementation methods can be combined in any suitable manner unless there is any contradiction. For example, different implementation methods can be formed by combining different specific technical features / embodiments. In order to avoid unnecessary repetition, the various possible combinations of the specific technical features / embodiments in the present invention will not be described separately.

[0047] like Figures 1 to 4 As shown, a battery liquid cooling system provided by an embodiment of the present invention comprises a first liquid cooling plate 10 connected to a battery module and a second liquid cooling plate 20 sandwiched between two battery modules, the first liquid cooling plate 10 and the second liquid cooling plate 20 are respectively provided with a liquid inlet and a liquid outlet, the first liquid cooling plate 10 and the second liquid cooling plate 20 are provided with independent circulation channels whose two ends are respectively connected to the liquid inlet and the liquid outlet, the liquid inlet (first liquid inlet) and the liquid outlet (first liquid outlet) of the first liquid cooling plate 10 and the liquid inlet (second liquid inlet) and the liquid outlet (second liquid outlet) of the second liquid cooling plate 20 are connected in parallel, so that the coolant temperatures of the independent circulation channels inside the first liquid cooling plate 10 and the second liquid cooling plate 20 will not affect each other, the battery module temperature consistency is good, which is conducive to ensuring the normal use of the battery module.

[0048] It can be understood that the coolant can be used for cooling or heating, that is, when the temperature is too low, the coolant is heated and flows through the liquid cooling plate (the first liquid cooling plate 10, the second liquid cooling plate 20), so that the battery module is heated to a suitable range to ensure that the battery module can be charged and discharged within a suitable temperature range.

[0049] Specifically, the battery module includes a plurality of adjacently arranged battery cells, which may be long battery cells that can be assembled using a lamination process, and the independent circulation channel passes through areas close to both ends of the plurality of battery cells. The independent circulation channel of the first liquid cooling plate 10 may be in the shape of a "mouth" and pass through areas close to both ends of the plurality of battery cells, which is beneficial to improving the temperature control effect. In this embodiment, Figure 4 and Figure 6 As shown, the battery module is divided into a front battery module 91 and a rear battery module 92, the first liquid cooling plate 10 is connected to the front battery module 91, and the second liquid cooling plate 20 is connected to the rear battery module 92. There are poles 901 at both ends of the front and rear of each battery cell, and the first independent circulation channel is located on the top or bottom surface of the front battery module 91 and close to the front and rear ends of the battery cell (the pole 901 ends), which is conducive to effectively cooling the pole 901 with higher heat generation.

[0050] Optionally, the first liquid cooling plate 10 is provided with a first liquid inlet 101 and a first liquid outlet 102, and the first liquid inlet 101 and the first liquid outlet 102 are connected by a first independent circulation channel. The second liquid cooling plate 20 is provided with a second liquid inlet 201 and a second liquid outlet 202, and the second liquid inlet 201 and the second liquid outlet 202 are connected by a second independent circulation channel.

[0051] like Figures 1 to 7 As shown, the first liquid inlet 101 and the first liquid outlet 102 can be arranged at the front end side of the (front row) battery module. The second liquid inlet 201 and the second liquid outlet 202 can be arranged at the front end side of the (rear row) battery module. The independent circulation channel is arranged from the first liquid inlet 101 along the edge close to the first liquid cooling plate 10 to the first liquid outlet 102. The cross-section of the first independent circulation channel can be flat, and it is arranged around the inner circumference of the first liquid cooling plate 10. The first independent circulation channel has a long path and covers a large heat dissipation area, which is conducive to further improving the heat dissipation and temperature regulation effect. The arrangement of the first independent circulation channel can be in the shape of a "mouth" with a breakpoint, and the liquid inlet and the liquid outlet are respectively arranged on both sides of the breakpoint, and the two ends of the independent circulation channel are the liquid inlet and the liquid outlet respectively. In this embodiment, the coolant in the first liquid cooling plate 10 flows in the shape of a "mouth", and the coolant is close to the lead-out end of the pole 901, and the position of the pole 901 with high heat generation is preferentially cooled. Basically, each battery cell is in contact with two types of coolant at different temperatures, so as to avoid the problem of uneven temperature and excessive temperature difference of the battery cell caused by the single flow direction of the coolant. The module temperature consistency is better, and the battery cells can form a large module structure, such as a 34S module (a module composed of 34 battery cells, weighing about 100Kg). In a low temperature environment, the heat of the battery cells on both sides of the battery module is more easily lost. The independent circulation channel flows through the battery cells along the length direction. When the battery module is heated in a low temperature environment, the heating effect of the battery cells on both sides of the battery module is better.

[0052] Alternatively, if Figure 7As shown, the first independent circulation channel includes a liquid inlet section 141 connected to the first liquid inlet 101 at one end, and a liquid outlet section 142 connected to the first liquid outlet 102 at one end. The circulation path also includes a middle section 143 connected to the liquid inlet section 141 and the liquid outlet section 142 at both ends. The liquid inlet section 141 and the liquid outlet section 142 are close to one end (front end) of the front-row battery module, and the middle section 143 is close to the other end (rear end) opposite to the front-row battery module. The coolant can enter from the first liquid inlet 101 in the middle of the front end of the front-row battery module, flow along the liquid inlet section 141, adjust the temperature of the part of the pole 901 close to the front end, and then flow along the middle section 142143 to adjust the temperature of the pole 901 close to the rear end, and then flow from the liquid outlet section 142 to the first liquid outlet 102 to adjust the temperature of the other part of the pole 901 close to the front end. Of course, the first independent circulation channel can also be in a circuitous zigzag shape.

[0053] Optionally, the battery liquid cooling system has a liquid inlet joint 31 and a liquid outlet joint 32, and the liquid inlet joint 31 and the liquid outlet joint 32 can be connected to a circulation pump, etc. The liquid inlet joint 31 is connected to the liquid inlet (first liquid inlet 101) of the first liquid cooling plate 10 through a first liquid inlet pipe 33, and the liquid outlet joint 32 is connected to the liquid outlet (first liquid outlet 102) of the first liquid cooling plate 10 through a first liquid outlet pipe 34.

[0054] In a specific application, the second liquid cooling plate 20 may be provided with one, and the second liquid cooling plate 20 may be sandwiched between two rear-row battery modules 92. The second liquid inlet 201 of the second liquid cooling plate 20 is connected to the first liquid inlet pipe 33 or the liquid inlet joint 31 through a second liquid inlet pipe 35, and the second liquid outlet 202 of the second liquid cooling plate 20 is connected to the first liquid outlet pipe 34 or the liquid outlet joint 32 through a second liquid outlet pipe 36.

[0055] In specific applications, at least two second liquid cooling plates 20 may be provided, and each second liquid cooling plate 20 may be arranged side by side in sequence between two rear-row battery modules 92. In this way, the size of a single second liquid cooling plate 20 is smaller, and there are more second independent circulation channels, which is conducive to improving the cooling effect. The second liquid inlet 201 of one of the second liquid cooling plates 20 is connected to the first liquid inlet pipe 33 or the liquid inlet joint 31 through the second liquid inlet pipe 35, and the second liquid outlet 202 of the second liquid cooling plate 20 is connected to the first liquid outlet pipe 34 or the liquid outlet joint 32 through the second liquid outlet pipe 36, and the liquid inlets and liquid outlets of the remaining second liquid cooling plates 20 are respectively connected to the second liquid inlet pipe 35 and the second liquid outlet pipe 36 of the adjacent second liquid cooling plate 20 through connecting branches. That is, only the liquid inlet and the liquid outlet of one of the second liquid cooling plates 20 need to be connected to the first liquid inlet pipe 33 (or the liquid inlet joint 31) and the first liquid outlet pipe 34 (or the liquid outlet joint 32), and the remaining second liquid cooling plates 20 can be connected in parallel in sequence, which can effectively save pipelines and reduce space occupancy.

[0056] In this embodiment, the battery liquid cooling system has a liquid inlet joint 31 and a liquid outlet joint 32, the liquid inlet joint 31 is connected to the liquid inlet of the first liquid cooling plate 10 through a first liquid inlet pipe 33, and the liquid outlet joint 32 is connected to the liquid outlet of the first liquid cooling plate 10 through a first liquid outlet pipe 34. The second liquid cooling plate 20 can be provided with at least two, including a first rear row liquid cooling plate and a second rear row liquid cooling plate. The liquid inlet of the first rear row liquid cold plate is connected to the first liquid inlet pipe 33 or the liquid inlet joint 31 through the second liquid inlet pipe 35, and the liquid outlet of the second rear row liquid cold plate is connected to the first liquid outlet pipe 34 or the liquid outlet joint 32 through the second liquid outlet pipe 36; the liquid outlet of the first rear row liquid cold plate is connected to the second liquid outlet pipe 36 through the first connecting branch pipe 38, and the liquid inlet of the second rear row liquid cold plate is connected to the first liquid inlet pipe 33 through the second connecting branch pipe 37. The connection method is reasonable, occupies little space, and the total length of the pipeline is relatively short, which is beneficial to reducing the coolant pressure loss and reducing the application cost.

[0057] In specific applications, the first liquid inlet pipe 33, the first liquid outlet pipe 34, the second liquid inlet pipe 35, the first liquid outlet pipe 34 and the second liquid outlet pipe 36, the first connecting branch pipe 38 and the second connecting branch pipe 37 can be PA pipes (nylon pipes), which have good reliability. In this embodiment, the liquid inlet joint 31 and the liquid outlet joint 32 can be three-way pipes or three-way solenoid valves. The liquid cooling plates can be connected with PA pipes to ensure that each liquid cooling plate is connected to the coolant with the same temperature and does not affect each other. The PA pipe can be used for diversion to ensure that the flow rate of each cooling circuit is reasonable, thereby ensuring the consistency of the temperature of the entire battery module package.

[0058] Alternatively, if Figure 3As shown, a plurality of diverter spoiler columns 110 may be provided in the first independent circulation channel of the first liquid cooling plate 10. Adjacent diverter spoiler columns 110 are staggered along the flow direction of the coolant of the first liquid cooling plate 10. The diverter spoiler columns 110 may be drop-shaped, circular or elliptical, etc. The diverter spoiler columns 110 may be formed inside the liquid cooling plate by stamping the upper end or the lower end of the first liquid cooling plate 10 toward the other end, which is beneficial to improving the heat exchange efficiency. Of course, a plurality of diverter spoiler columns 110 may also be provided in the second independent circulation channel of the second liquid cooling plate 20.

[0059] Alternatively, if Fig.12 As shown, the second independent circulation channel of the second liquid cooling plate 20 is provided with a flow channel fin 210, and the flow channel fin 210 can divide the second independent circulation channel into a plurality of branch channels, which is beneficial to improve the heat exchange efficiency. The flow channel fin 210 can be supported on the upper and lower inner walls of the second independent circulation channel, which can effectively improve the structural strength of the second liquid cooling plate. Of course, when the first liquid cooling plate 10 is not provided with the branch spoiler column 110, the flow channel fin 210 can also be provided in the first liquid cooling plate 10.

[0060] Optionally, the flow channel fin 210 has at least two fins that are spaced apart and arranged along the independent circulation channel. In specific applications, the flow channel fin 210 can be formed by stamping or bending a metal sheet. In this embodiment, the fin can be U-shaped to divide the second independent circulation channel into a plurality of U-shaped flow channels. Alternatively, as an alternative, a flow channel can be formed inside the liquid cooling plate by stamping from the upper end or the lower end of the second liquid cooling plate to the other end.

[0061] Alternatively, if Figure 12 to Figure 14 As shown, the second liquid cooling plate 20 includes an upper cover 21 and a lower cover 22 that are matched with each other. The flow channel fin 210 can be stamped and fixedly connected to (for example, welded to) the upper cover 21 or the lower cover 22. The upper and lower ends of the flow channel fin 210 are respectively connected to the upper cover 21 and the lower cover 22, that is, the flow channel fin 210 can be supported on the upper and lower inner walls of the independent circulation channel.

[0062] Specifically, the upper cover 21 or / and the lower cover 22 are stamped with a guide wall 23, and the guide wall 23 is located between the second liquid inlet 201 and the inlet end of the flow channel fin 210, and / or, the guide wall 23 is located between the second liquid outlet 202 and the outlet end of the flow channel fin 210. One or more guide walls 23 may be provided, which may be arc-shaped, which is conducive to diverting the coolant to each branch channel, and is conducive to ensuring that the coolant flows evenly through each branch channel, which can make the fluid distribution in the cooling plate more uniform, thereby making the cooling temperature consistency of the liquid cooling plate better, and strengthening the mechanical strength of the second liquid cooling plate 20.

[0063] The first liquid inlet 101 and the first liquid outlet 102 of the first liquid cooling plate 10 are adjacently arranged on one side of the first liquid cooling plate 10, and the first liquid inlet 101 and the first liquid outlet 102 are separated from each other by a partition bar 131, so as to prevent the coolant entering the first liquid inlet 101 from being directly discharged from the first liquid outlet 102 without passing through an independent circulation channel. The second liquid inlet 201 and the second liquid outlet 202 of the second liquid cooling plate 20 are adjacently arranged on one side of the second liquid cooling plate 20 and separated from each other by a partition bar, so as to prevent the coolant entering the second liquid inlet 201 from being directly discharged from the second liquid outlet 202 without passing through an independent circulation channel. In a specific application, the partition bar 131 for separating the first liquid inlet 101 and the first liquid outlet 102 can be formed inside the first liquid cooling plate 10 by stamping from the upper end or the lower end of the first liquid cooling plate 10 to the other end. The partition bar for separating the second liquid inlet 201 and the second liquid outlet 202 can be formed inside the second liquid cooling plate 20 by stamping the upper end (upper cover 21) or the lower end (lower cover 22) of the second liquid cooling plate 20 toward the other end.

[0064] In this embodiment, the first liquid cooling plate 10 is provided with a flow diversion spoiler column 110, which can be used for diversion and spoiler, so that the fluid distribution in the first liquid cooling plate 10 is more uniform, avoiding the existence of fluid dead zones (places where the coolant is difficult to flow through), and strengthening the heat exchange between the first liquid cooling plate 10 and the battery cell. In this embodiment, the second liquid cooling plate 20 is provided with a flow channel fin 210, and the coolant of the second liquid cooling plate 20 can form a loop by itself, flowing in a "U" shape, and the upper and lower layers of the battery cells can be fully cooled to ensure the temperature consistency of the upper and lower layers of the battery cells.

[0065] Alternatively, if Figure 3 As shown, a planar lifting suction cup adsorption area 120 is provided in the middle of the first liquid cooling plate 10, a first independent circulation channel of the first liquid cooling plate 10 is provided around the lifting suction cup adsorption area 120, and a diversion spoiler column 110 is provided around the lifting suction cup adsorption area 120. The surface of the lifting suction cup adsorption area 120 is flat, so as to facilitate the adsorption and lifting of the electromagnetic suction cup. Moreover, by designing a large plane in the middle of the first liquid cooling plate 10 as the lifting suction cup adsorption surface, the overall module is subjected to uniform force during the lifting process, so as to avoid module deformation affecting other structural parts.

[0066] Specifically, a stamping groove is provided on one side of the first liquid cooling plate 10 , and the bottom of the stamping groove is the adsorption area 120 of the lifting suction cup, so that the structural reliability is better.

[0067] Specifically, Figures 1 to 8As shown, the battery liquid cooling system of this embodiment is applied to a battery module with a single layer in the front row and a double layer in the rear row. The battery module is provided with an end plate 141, which can be a metal plate, etc. An insulating plate 142 is provided between the end plate 141 and the battery cell. The end plate 141 can be located on the left and right sides of the battery module. The front and rear sides of the battery module can be provided with a protective cover 143, which can cover the pole 901. The pole 901 can be connected to a connecting piece 145, and the connecting piece 145 can be connected to an FPC (flexible circuit board) 146. The bottom of the front battery module 91 can be connected to a bottom plate (composite material board) 144, and glue can be provided on the inside of the bottom plate 144. The front battery module 91 is also connected to a power bracket 147. The top of the front battery module 91 is connected to the first liquid cooling plate 10. In addition, reinforced connecting parts 11111 are provided on both sides of the first liquid cooling plate 10. The reinforced connecting parts 11111 are fixedly connected to the end plates 141 at the left and right ends of the front battery module 91 through a fixed structure. The heat insulation plate assembly in the prior art can be eliminated, thereby avoiding relative movement between the first liquid cooling plate 10 and the battery cell, and utilizing the fixed structure of the first liquid cooling plate 10 and the end plate 141 to strengthen the mechanical strength of the module.

[0068] Specifically, the reinforced connection part 11111 is a bent part integrally formed on both sides of the first liquid cooling plate 10 and attached to the outer side of the end plate 141. The fixing structure is a rivet 111112 connected to the bent part and the end plate 141. A plurality of rivets 111112 can be provided, and the structural reliability is good.

[0069] Specifically, the second liquid cooling plate 20 is provided with an upper pull-up plate connecting portion 211 and a lower pull-up plate connecting portion 221. The upper pull-up plate connecting portion 211 is fixedly connected to the end plate 141 of the upper battery module through an upper locking member, and the lower pull-up plate connecting portion 221 is fixedly connected to the end plate 141 of the lower battery module through a lower locking member. The second liquid cooling plate 20 can be fixedly connected to the upper battery module and the lower battery module respectively at the same time, and the upper locking member and the lower locking member can be rivets.

[0070] Specifically, the second liquid cooling plate 20 has a glued surface 203 and a limiting surface 204 for contacting the rear battery module 92, and thermal conductive glue is arranged between the glued surface 203 and the battery module, and the glued surface 203 and the limiting surface 204 have a height difference for accommodating the thermal conductive glue, that is, the glued surface 203 and the limiting surface 204 form a space of a certain thickness for accommodating the thermal conductive glue, so as to prevent the thermal conductive glue from being pressurized and overflowing, thereby ensuring that the thermal conductive glue can be evenly and stably arranged between the glued surface 203 and the limiting surface 204.

[0071] In this embodiment, the first liquid cooling plate 10 and the second liquid cooling plate 20 can be bonded to the battery module (battery cell) with a thermally conductive structural adhesive, and then riveted to the side of the battery module end plate 141 with rivets, respectively, to ensure that the mechanical strength of the overall module meets the impact and vibration requirements, avoid the mutual movement of the liquid cooling plate and the battery cell to wear the battery cell and the cold plate, and have good reliability.

[0072] Specifically, Figures 9 to 14 As shown, the second liquid cooling plate 20 may include an upper cover 21 and a lower cover 22. The upper cover 21 and the lower cover 22 may be formed by stamping of metal plates, and the upper cover 21 and the lower cover 22 may be welded after being joined. The upper end surface of the upper cover 21 and the lower end surface of the lower cover 22 are the glued surface 203; the upper limit plate 212 is integrally connected to both sides of the upper cover 21, and the lower limit plate 222 is integrally connected to both sides of the lower end surface of the lower cover 22, and the upper end surface of the upper limit plate 212 and the lower end surface of the lower limit plate 222 are the limit surface 204; a support structure is provided between the upper limit plate 212 and / or the lower limit plate 222.

[0073] Specifically, the support structure includes a first protrusion 213 integrally stamped and formed on the upper limit plate 212 and in contact with the lower limit plate 222 and / or a second protrusion 223 integrally stamped and formed on the lower limit plate 222 and in contact with the upper limit plate 212. The first protrusion 213 and the second protrusion 223 may be convex ribs.

[0074] Specifically, the upper pull plate connection part 211 is integrally formed at both ends of the upper limit plate 212, and the upper pull plate connection part 211 is longitudinally bent upward relative to the upper limit plate 212. In specific applications, the upper pull plate connection part 211 is vertical or approximately vertical relative to the upper limit plate 212; the lower pull plate connection part 221 is integrally formed at both ends of the lower limit plate 222, and the lower pull plate connection part 221 is longitudinally bent downward relative to the lower limit plate 222 to respectively fix and connect the upper battery modules in the rear row. The lengths of the upper limit plate 212 and the lower limit plate 222 can be the same or different. In this embodiment, the first liquid cooling plate 10 and the second liquid cooling plate 20 integrate the pull plate structure to simplify the module structural parts.

[0075] The embodiment of the present invention also provides a vehicle, which has the above-mentioned battery liquid cooling system, and the temperature consistency of the whole battery pack is good, which is conducive to ensuring the normal use of the battery module. The vehicle can be a hybrid vehicle or a pure electric vehicle and other vehicles with a power battery system, and its power battery can be arranged with a single-layer battery module in the front row and a double-layer battery module in the rear row. In this embodiment, the above-mentioned first liquid cooling plate 10 is arranged above the single-layer battery module, and the first liquid cooling plate 10 can cover the top of the battery module, and the contact area between the first liquid cooling plate 10 and the top of the battery cell is large. The above-mentioned second liquid cooling plate 20 is arranged between the double-layer battery modules, and the second liquid cooling plate 20 is integrated between the upper and lower layers of the battery cells. The second liquid cooling plate 20 is bonded to the battery cell by using a thermal conductive structural adhesive, and then riveted to the end plate 141 of the battery module by using rivets, which strengthens the overall structure of the battery module, so that the module meets the mechanical vibration strength requirements, and the first liquid cooling plate 10 and the second liquid cooling plate 20 can be connected to the end plate 141 of the battery module by rivet connection, and the structural reliability is higher. Moreover, thermal conductive adhesive can be provided between the first liquid cooling plate 10 and the second liquid cooling plate 20 and the battery module, eliminating the original heat insulation plate assembly, avoiding relative movement between the liquid cooling plate and the battery cell, and utilizing the liquid cooling plate to enhance the mechanical strength of the module, thereby achieving good reliability.

[0076] A battery liquid cooling system and a vehicle having the battery liquid cooling system provided by an embodiment of the present invention have good temperature consistency of the battery module, which is beneficial to ensuring the normal use of the battery module.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent substitution or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery liquid cooling system, characterized in that: The battery module comprises a first liquid cooling plate connected to the battery module and a second liquid cooling plate sandwiched between two battery modules, wherein the first liquid cooling plate and the second liquid cooling plate are both provided with a liquid inlet and a liquid outlet, and the first liquid cooling plate and the second liquid cooling plate are provided with independent circulation channels whose two ends are respectively connected to the liquid inlet and the liquid outlet, and the liquid inlet and the liquid outlet of the first liquid cooling plate are connected in parallel with the liquid inlet and the liquid outlet of the second liquid cooling plate; The second liquid cooling plate has a glue surface, the second liquid cooling plate includes an upper cover and a lower cover, the upper end surface of the upper cover and the lower end surface of the lower cover are the glue surface, a thermal conductive adhesive is provided between the glue surface and the battery module, and the thermal conductive adhesive is bonded to the battery module adjacent thereto; The battery liquid cooling system comprises a liquid inlet joint and a liquid outlet joint, wherein the liquid inlet joint is connected to the liquid inlet of the first liquid cooling plate through a first liquid inlet pipe, and the liquid outlet joint is connected to the liquid outlet of the first liquid cooling plate through a first liquid outlet pipe; The second liquid cold plate comprises a first rear row liquid cold plate and a second rear row liquid cold plate, the liquid inlet of the first rear row liquid cold plate is connected to the first liquid inlet pipe or liquid inlet joint through a second liquid inlet pipe, and the liquid outlet of the second rear row liquid cold plate is connected to the first liquid outlet pipe or liquid outlet joint through a second liquid outlet pipe; the liquid outlet of the first rear row liquid cold plate is connected to the second liquid outlet pipe through a first connecting branch pipe, and the liquid inlet of the second rear row liquid cold plate is connected to the first liquid inlet pipe through a second connecting branch pipe; The battery modules are divided into a front-row battery module and a rear-row battery module, the first liquid cooling plate is connected to the front-row battery module, and the second liquid cooling plate is connected to the rear-row battery module; A planar hanging suction cup adsorption area is arranged in the middle of the first liquid cooling plate, and an independent circulation channel of the first liquid cooling plate is arranged around the hanging suction cup adsorption area.

2. A battery liquid cooling system as claimed in claim 1, characterized in that: The battery module includes a plurality of battery cells arranged adjacent to each other, and the independent circulation channel passes through areas close to both ends of the plurality of battery cells.

3. A battery liquid cooling system as claimed in claim 2, characterized in that: The liquid inlet and the liquid outlet of the first liquid cooling plate are adjacently arranged on one side of the first liquid cooling plate and are separated from each other, and the independent circulation channel is arranged from the liquid inlet along the edge close to the first liquid cooling plate to the liquid outlet.

4. A battery liquid cooling system as claimed in claim 2, characterized in that: Both ends of the battery cell are provided with poles, the independent circulation channel includes a liquid inlet section whose one end is connected to the liquid inlet and a liquid outlet section whose one end is connected to the liquid outlet, the independent circulation channel also includes a middle section whose two ends are respectively connected to the liquid inlet section and the liquid outlet section, the liquid inlet section and the liquid outlet section are close to one end of the battery module, and the middle section is close to the other end opposite to the battery module.

5. A battery liquid cooling system as claimed in claim 1, characterized in that: The battery liquid cooling system comprises a liquid inlet joint and a liquid outlet joint, wherein the liquid inlet joint is connected to the liquid inlet of the first liquid cooling plate through a first liquid inlet pipe, and the liquid outlet joint is connected to the liquid outlet of the first liquid cooling plate through a first liquid outlet pipe; The second liquid cooling plate is provided with one, the liquid inlet of the second liquid cooling plate is connected to the first liquid inlet pipe or the liquid inlet joint through the second liquid inlet pipe, and the liquid outlet of the second liquid cooling plate is connected to the first liquid outlet pipe or the liquid outlet joint through the second liquid outlet pipe; or, the second liquid cooling plate is provided with at least two, the liquid inlet of one of the second liquid cooling plates is connected to the first liquid inlet pipe or the liquid inlet joint through the second liquid inlet pipe, and the liquid outlet of the second liquid cooling plate is connected to the first liquid outlet pipe or the liquid outlet joint through the second liquid outlet pipe, and the liquid inlets and liquid outlets of the remaining second liquid cooling plates are respectively connected to the second liquid inlet pipe and the second liquid outlet pipe of the adjacent second liquid cooling plate through connecting branches.

6. A battery liquid cooling system according to any one of claims 1 to 5, characterized in that: A plurality of diverter spoiler columns are arranged in the independent circulation channel of the first liquid cooling plate, and adjacent diverter spoiler columns are staggered along the flow direction of the coolant of the first liquid cooling plate; and / or a plurality of diverter spoiler columns are arranged in the independent circulation channel of the second liquid cooling plate, and adjacent diverter spoiler columns are staggered along the flow direction of the coolant of the second liquid cooling plate.

7. A battery liquid cooling system according to any one of claims 1 to 5, characterized in that: The independent circulation channels of the second liquid cooling plate and / or the first liquid cooling plate are provided with flow channel fins.

8. A battery liquid cooling system as claimed in claim 7, characterized in that: The flow channel fin has at least two fins which are spaced apart and arranged along the independent circulation channel.

9. A battery liquid cooling system as claimed in claim 8, characterized in that: The second liquid cooling plate and / or the first liquid cooling plate include an upper cover and a lower cover that are matched with each other, the flow channel fin is stamped and welded to the upper cover or the lower cover, and the upper and lower ends of the flow channel fin are respectively connected to the upper cover and the lower cover.

10. A battery liquid cooling system as claimed in claim 9, characterized in that: The upper cover and / or the lower cover are stamped with a guide wall, and the guide wall is located between the liquid inlet and the inlet end of the flow channel fin, and / or the guide wall is located between the liquid outlet and the outlet end of the flow channel fin.

11. A battery liquid cooling system according to any one of claims 1 to 5, characterized in that: A stamping groove is provided on one side of the first liquid cooling plate, and the bottom of the stamping groove is the adsorption area of ​​the lifting suction cup.

12. A battery liquid cooling system according to any one of claims 1 to 5, characterized in that: The first liquid cooling plate is arranged on the top of the front battery module, and reinforced connection parts are arranged on both sides of the first liquid cooling plate, and the reinforced connection parts are fixedly connected to the end plates at both ends of the front battery module through a fixing structure.

13. A battery liquid cooling system as claimed in claim 12, characterized in that: The reinforcing connection portion is a bent portion integrally formed on both sides of the first liquid cooling plate and attached to the outer side of the end plate, and the fixing structure is a rivet connected to the bent portion and the end plate.

14. A battery liquid cooling system according to any one of claims 1 to 5, characterized in that: The second liquid cooling plate is provided with an upper pull-plate connecting portion and a lower pull-plate connecting portion. The upper pull-plate connecting portion is fixedly connected to the end plate of the upper battery module through an upper locking member, and the lower pull-plate connecting portion is fixedly connected to the end plate of the lower battery module through a lower locking member.

15. A battery liquid cooling system as claimed in claim 14, characterized in that: The second liquid cooling plate has a limiting surface for contacting the battery module, and the gluing surface and the limiting surface have a height difference for accommodating the thermal conductive glue.

16. A battery liquid cooling system as claimed in claim 15, characterized in that: Upper limit plates are integrally connected to both sides of the upper cover, lower limit plates are integrally connected to both sides of the lower end surface of the lower cover, the upper end surface of the upper limit plate and the lower end surface of the lower limit plate are lower limit surfaces; a supporting structure is arranged between the upper limit plate and / or the lower limit plate.

17. A battery liquid cooling system as claimed in claim 16, characterized in that: The support structure includes a first protrusion integrally stamped and formed on the upper limit plate and in contact with the lower limit plate and / or a second protrusion integrally stamped and formed on the lower limit plate and in contact with the upper limit plate.

18. A battery liquid cooling system as claimed in claim 17, characterized in that: The upper pull-up plate connecting part is integrally formed at both ends of the upper limit plate, and the upper pull-up plate connecting part is longitudinally bent upward relative to the upper limit plate; the lower pull-down plate connecting part is integrally formed at both ends of the lower limit plate, and the lower pull-down plate connecting part is longitudinally bent downward relative to the lower limit plate; the upper locking part and the lower locking part are rivets.

19. A vehicle, characterized in that: The vehicle has a battery liquid cooling system according to any one of claims 1 to 18.

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