Battery heat management device, battery, battery heat exchange control system and electric equipment

Abstract

The utility model belongs to the technical field of batteries, and particularly relates to a battery heat management device, a battery, a battery heat exchange control system and electric equipment. The battery thermal management device comprises a heat exchange plate; the heat exchange plate is provided with a main flow channel and an auxiliary flow channel which are independent of each other. The main flow channel and the auxiliary flow channel are used for being connected with corresponding liquid supply pipelines. Wherein the bottom of the auxiliary flow channel is provided with an explosion-proof hole, the explosion-proof hole is covered with a sealing diaphragm, and the sealing diaphragm can be damaged under the action of high temperature or high pressure, so that the heat exchange liquid in the auxiliary flow channel flows to the battery cell through the explosion-proof hole. The structure and the assembly mode of the heat exchange plate are improved, the heat exchange plate can independently exchange heat with the battery cell through the main flow channel and the auxiliary flow channel, when thermal runaway occurs, heat exchange liquid in the auxiliary flow channel flows out through the anti-explosion hole and carries out pouring and fire extinguishing on the battery cell, and the main flow channel can still carry out heat exchange normally, so that the cooling effect is further enhanced, and the service life of the battery cell is prolonged. The heat spreading phenomenon is avoided, and the safety performance of the battery can be effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and in particular relates to a battery thermal management device, a battery, a battery heat exchange control system and electrical equipment. Background Art

[0002] With the rapid development of battery technology, battery safety has become one of the key factors affecting the promotion and application of battery products. Taking new energy vehicles as an example, they not only need power batteries to provide electricity, but also require power batteries to have good operating stability and safety, so as to ensure the safety of drivers and passengers even in the event of emergencies.

[0003] In order to improve the safety performance of power batteries, liquid cooling plates are usually used in existing power batteries for cooling and temperature reduction. Some products provide a solution of setting a weak part in the flow channel of the liquid cooling device. When thermal failure occurs, the weak part is damaged so that the coolant flows out and directly contacts the battery cell, thereby enhancing the cooling effect on the battery cell. However, the weak part of the flow channel in the above solution is a one-time structure. Once damaged, it cannot be restored, and the liquid cooling plate cannot be used anymore. It needs to be replaced before it can play a cooling role. The effect of inhibiting heat spread is limited, and there are still certain safety risks during battery use. Utility Model Content

[0004] In view of this, in order to improve at least one of the above-mentioned problems existing in the prior art, the utility model provides a battery thermal management device, a battery, a battery heat exchange control system and an electrical device.

[0005] The first technical solution of the utility model provides a battery thermal management device, including: a heat exchange plate, suitable for being arranged corresponding to the top of a battery cell; the heat exchange plate is provided with a main flow channel and an auxiliary flow channel that are independent of each other, and the main flow channel and the auxiliary flow channel are both used to connect with the corresponding liquid supply pipeline; wherein, an explosion-proof hole is opened at the bottom of the auxiliary flow channel, and the explosion-proof hole is covered with a sealing diaphragm, and the sealing diaphragm can be damaged under high temperature or high pressure, so that the heat exchange liquid in the auxiliary flow channel can flow to the battery cell through the explosion-proof hole.

[0006] In a feasible implementation, the heat exchange plate includes a flow channel plate and a support plate: a side of the flow channel plate facing the support plate is provided with a recessed main flow channel groove and an auxiliary flow channel groove, and the main flow channel groove and the auxiliary flow channel groove are arranged alternately; the support plate is fitted and connected to the flow channel plate, the main flow channel groove and the support plate are combined to form a main flow channel, and the auxiliary flow channel groove and the support plate are combined to form an auxiliary flow channel; wherein, an explosion-proof hole is provided at a position on the support plate corresponding to the auxiliary flow channel groove.

[0007] In a feasible implementation, the auxiliary flow channel groove includes a primary groove body and a secondary groove body arranged at the bottom of the primary groove body, and the primary groove body and the secondary groove body form a stepped shape; a concave matching groove is provided on the side of the support plate facing away from the flow channel plate, so that a first protrusion structure is formed on the side of the support plate facing the flow channel plate, and the first protrusion structure extends into the primary groove body to form an auxiliary flow channel; wherein, the explosion-proof hole is provided on the bottom surface of the matching groove.

[0008] In a feasible implementation, the mating groove includes a plurality of first mating grooves extending along a first direction, and each first mating groove is provided with a plurality of explosion-proof holes spaced apart along the first direction; a plurality of second protrusion structures are spaced apart along the first direction in the secondary groove body, and the second protrusion structures protrude toward a direction close to the support plate and are connected to the top of the corresponding first mating groove; wherein the portion between any two adjacent second protrusion structures in the secondary groove body is a spacer, and each spacer is arranged opposite to an explosion-proof hole.

[0009] In a feasible implementation, the main flow channel includes a first sub-flow channel and a second sub-flow channel arranged in a serpentine shape, and the first sub-flow channel is connected end to end with the second sub-flow channel; the auxiliary flow channel includes a third sub-flow channel and a fourth sub-flow channel arranged in a serpentine shape, and the third sub-flow channel is connected end to end with the fourth sub-flow channel.

[0010] In a feasible implementation, a first liquid inlet and a first liquid outlet are provided at a position on the support plate corresponding to the main channel, the first sub-channel is connected to the first liquid inlet, the second sub-channel is connected to the first liquid outlet, and the first liquid inlet is connected to a first liquid inlet joint, and the first liquid outlet is connected to a first liquid outlet joint; a second liquid inlet and a second liquid outlet are provided at a position on the support plate corresponding to the auxiliary channel, the third sub-channel is connected to the second liquid inlet, the fourth sub-channel is connected to the second liquid outlet, and the second liquid inlet is connected to a second liquid inlet joint, and the second liquid outlet is connected to a second liquid outlet joint.

[0011] In a feasible implementation, the battery thermal management device further includes: a heat conductive member, which is disposed on a side of the support plate away from the flow channel plate and abuts against the support plate, and the heat conductive member is used to conduct heat between the battery cell and the support plate.

[0012] The technical solution of the second aspect of the utility model provides a battery, comprising: a plurality of battery cells; and the battery thermal management device in any one of the above-mentioned first aspect, which is arranged on the top of the plurality of battery cells.

[0013] The technical solution of the third aspect of the utility model provides a battery heat exchange control system, including: a battery as described in any one of the above-mentioned second aspects; a first liquid supply circuit, in which the main flow channel of the battery is connected to the first liquid supply circuit; a second liquid supply circuit, in which the auxiliary flow channel of the battery is connected to the second liquid supply circuit; a controller, which is communicatively connected to the first liquid supply circuit and the second liquid supply circuit, and the controller is suitable for controlling the liquid supply status of the first liquid supply circuit and / or the second liquid supply circuit.

[0014] The technical solution of the fourth aspect of the utility model provides an electrical device, including the battery in any one of the second aspect or the battery heat exchange control system in any one of the third aspect.

[0015] The beneficial effects of the above technical solution of the utility model are embodied in:

[0016] The structure and assembly method of the heat exchange plate have been improved, and it can exchange heat with the battery cell independently through the main channel and the auxiliary channel respectively. When thermal runaway occurs, the main channel cools the surface of the battery cell, and the heat exchange fluid in the auxiliary channel flows out through the explosion-proof hole and irrigates the battery cell to extinguish the fire, thereby quickly reducing the temperature of the battery cell and suppressing the spread of heat. Even without replacing the heat exchange plate, normal heat exchange can be carried out through the main channel, and the cooling effect is further enhanced, which can effectively improve the safety performance of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Shown is a three-dimensional schematic diagram of a battery thermal management device provided by an embodiment of the utility model.

[0018] Figure 2 Shown is a three-dimensional schematic diagram of a battery thermal management device provided by an embodiment of the utility model from another viewing angle.

[0019] Figure 3 Shown is a side schematic diagram of a battery thermal management device provided by an embodiment of the utility model.

[0020] Figure 4 Shown is a three-dimensional schematic diagram of a battery thermal management device provided by an embodiment of the utility model from another viewing angle.

[0021] Figure 5 Shown is a three-dimensional schematic diagram of a battery thermal management device provided by an embodiment of the utility model from another viewing angle.

[0022] Figure 6 Shown is a schematic diagram of a battery thermal management device in an exploded state provided by an embodiment of the utility model.

[0023] Figure 7 Shown is a schematic diagram of a disassembled state of a battery provided by an embodiment of the utility model.

[0024] Figure 8 Shown is a half-section view of a heat exchange plate provided by an embodiment of the utility model.

[0025] Fig. 9 Shown is a partial perspective view of a heat exchange plate provided by an embodiment of the utility model.

[0026] Fig.10 Shown is a partial perspective view of a heat exchange plate provided by an embodiment of the utility model at another viewing angle.

[0027] Fig.11 Shown is a schematic diagram of a battery heat exchange control system provided by an embodiment of the utility model.

[0028] in, Fig.10 The direction indicated by the dot-dash arrow in the figure represents the flow direction of the heat exchange fluid.

[0029] Description of reference numerals:

[0030] 1 heat exchange plate, 101 main channel, 102 auxiliary channel, 11 channel plate, 111 main channel groove, 1111 first sub-channel, 1112 second sub-channel, 112 auxiliary channel groove, 1121 primary channel body, 1122 secondary channel body, 1123 third sub-channel, 1124 fourth sub-channel, 1125 second protruding structure, 1126 spacer, 12 support plate, 121 matching groove, 1211 first matching groove, 122 explosion-proof hole, 123 sealing diaphragm, 1241 first liquid inlet, 1242 first liquid outlet, 1243 second liquid inlet, 1244 second liquid outlet, 125 first protruding structure, 131 first liquid inlet joint, 132 first liquid outlet joint, 133 second liquid inlet joint, 134 second liquid outlet joint;

[0031] 210 battery cell, 211 battery cell explosion-proof valve;

[0032] 310 first liquid supply circuit, 311 first water pump, 312 first overflow pot, 313 heat exchanger, 320 second liquid supply circuit, 321 second water pump, 322 second overflow pot, 330 air conditioning system. DETAILED DESCRIPTION

[0033] In the description of the application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise clearly and specifically limited. In the embodiment of the present application, all directional indications (such as up, down, left, right, front, back, top, bottom ...) are only used to explain the relative position relationship, motion conditions, etc. between the components under a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their deformations are intended to cover non-exclusive inclusions. For example, the process, method, system, product or equipment comprising a series of steps or units are not limited to the steps or units listed, but optionally also include the steps or units not listed, or optionally also include other steps or units inherent to these processes, methods, products or equipment.

[0034] In addition, the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0035] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] Application Overview

[0037] In recent years, with the rapid development of battery technology, power batteries have been widely used in many fields, such as electric vehicles. As a common energy supply device, the safety performance of power batteries plays a vital role in electrical equipment. In order to improve the safety performance of power batteries, liquid cooling plates are usually used in existing power batteries for cooling. Some products provide solutions for setting weak parts in the flow channel of the liquid cooling device. When thermal failure occurs, the weak parts can be damaged under high temperature and high pressure, so that the coolant flows out from the weak parts and directly contacts the battery cells, thereby directly cooling the battery cells.

[0038] However, the above scheme still has the following disadvantages: the weak part of the flow channel is a disposable structure, and once damaged, it cannot be restored. The liquid cooling plate cannot be used anymore and needs to be replaced before it can continue to cool. In actual applications, due to the complicated disassembly and replacement operations, this type of liquid cooling plate has limited effect on suppressing heat spread when thermal failure occurs, resulting in certain safety risks during battery use.

[0039] The following provides some embodiments of the battery thermal management device, battery, battery heat exchange control system and electrical equipment in the technical solution of the utility model.

[0040] In an embodiment of the first aspect of the present utility model, a battery thermal management device is provided, such as Figure 1 and Figure 2As shown, the battery thermal management device includes a heat exchange plate 1, which is arranged corresponding to the top of the battery cell during assembly. The heat exchange plate 1 is provided with a main flow channel 101 and an auxiliary flow channel 102, which are independently arranged and can be connected to corresponding liquid supply pipelines, so that the heat exchange liquid can flow in the main flow channel 101 and the auxiliary flow channel 102 respectively, so that when heat exchange occurs between the heat exchange plate 1 and the battery cell, the heat of the battery cell is taken away by the heat exchange liquid to achieve cooling and heat dissipation, or the heat exchange liquid is used to conduct heat to the battery cell to achieve heating of the battery cell. Among them, an explosion-proof hole 122 is opened at the bottom of the auxiliary flow channel 102, and the explosion-proof hole 122 is covered with a sealing diaphragm 123, which can be damaged under high temperature or high pressure; when the battery cell has thermal runaway, the high temperature and high pressure gas generated can cause the sealing diaphragm 123 at the explosion-proof hole 122 to be damaged, so that the heat exchange fluid in the auxiliary flow channel 102 flows to the battery cell through the explosion-proof hole 122, producing a watering and fire extinguishing effect.

[0041] In practical applications, the main flow channel 101 and the auxiliary flow channel 102 may be arranged in a manner corresponding to the battery cell, for example Figures 1 to 3 The number of explosion-proof holes 122 can be set to one or more. Preferably, multiple explosion-proof holes 122 can be set at different positions in the auxiliary flow channel 102, for example Figure 2 and Figure 3 In the example, the heat exchange fluid can flow to different positions of the battery cell after the sealing diaphragm 123 is damaged.

[0042] In addition, when the battery thermal management device is used in the battery, a corresponding battery heat exchange control system can be set to control the liquid supply of the main flow channel 101 and the auxiliary flow channel 102 of the heat exchange plate 1. The heat exchange plate 1 can not only cool down the battery cell, but also heat up the battery cell according to the use needs.

[0043] The battery in this embodiment includes but is not limited to a battery module or a battery pack.

[0044] The battery thermal management device in this embodiment improves the structure and assembly method of the heat exchange plate 1, and can exchange heat with the battery cell independently through the main channel 101 and the auxiliary channel 102. When thermal runaway occurs, the main channel 101 cools the surface of the battery cell, and the heat exchange fluid in the auxiliary channel 102 flows out through the explosion-proof hole 122 and irrigates the battery cell to extinguish the fire, thereby quickly reducing the temperature of the battery cell, inhibiting heat conduction, and avoiding the phenomenon of heat spread, which can effectively improve the safety performance of the battery. Moreover, since the auxiliary channel and the main channel are independent of each other, the heat exchange plate can still exchange heat normally through the main channel after the sealing diaphragm is damaged, and it can still play a cooling role even if the heat exchange plate is not replaced, further improving the cooling effect. When the battery thermal management device is applied to the power battery of an electric vehicle, it can provide passengers with sufficient escape time when the battery thermal runaway occurs, thereby improving the driving safety of the entire vehicle.

[0045] In a further embodiment of the present invention, Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the heat exchange plate 1 includes a flow channel plate 11 and a support plate 12 that are fitted and connected to each other. A concave main flow channel groove 111 and an auxiliary flow channel groove 112 are provided on one side of the flow channel plate 11 facing the support plate 12, and the main flow channel groove 111 and the auxiliary flow channel groove 112 are staggered with each other to maximize the area of ​​the main flow channel groove 111 and the auxiliary flow channel groove 112 within the limited space of the flow channel plate 11. The main flow channel groove 111 and the support plate 12 are combined to form the main flow channel 101, and correspondingly, the auxiliary flow channel groove 112 and the support plate 12 are combined to form the auxiliary flow channel 102. Among them, the explosion-proof hole 122 is arranged at a position on the support plate 12 corresponding to the auxiliary flow channel groove 112, so that the explosion-proof hole 122 can be connected to the auxiliary flow channel 102. As shown Figure 7 As shown, after the battery thermal management device is assembled, the support plate 12 is located on the side of the heat exchange plate 1 facing the battery cell 210, so that the explosion-proof hole 122 is located at the bottom of the heat exchange plate 1. When the battery cell 210 has thermal runaway, the sealing diaphragm 123 at the explosion-proof hole 122 is damaged by the high temperature and high pressure, and the heat exchange fluid in the auxiliary flow channel 102 flows from the explosion-proof hole 122 to the battery cell 210 under the action of gravity, forming a watering fire extinguishing effect.

[0046] Furthermore, if Figures 4 to 7As shown, the auxiliary flow channel groove 112 specifically includes a primary groove body 1121 and a secondary groove body 1122. The secondary groove body 1122 is arranged at the bottom of the primary groove body 1121 and forms a stepped structure with the primary groove body 1121. Correspondingly, a concave matching groove 121 is provided on one side of the alternative flow channel plate 11 of the support plate 12. The concave structure of the matching groove 121 forms a first protruding structure 125 on the side of the support plate 12 facing the flow channel plate 11. The first protruding structure 125 is adapted to the primary groove body 1121, and the first protruding structure 125 extends into the primary groove body 1121 to match the auxiliary flow channel groove 112 to form the auxiliary flow channel 102. The explosion-proof hole 122 is arranged on the bottom surface of the matching groove 121 to correspond to the auxiliary flow channel 102. By providing the structure of the primary slot body 1121 and the matching slot 121, after being assembled in the battery, sufficient exhaust space can be reserved above the battery cell 210 to relieve pressure when thermal runaway occurs in the battery cell 210, thereby preventing explosion accidents caused by poor pressure relief.

[0047] During the production process, the main channel groove 111 can be formed by one-time stamping, and the specific stamping depth is set according to the thickness of the substrate and the pressure reduction requirement of the whole package. For example, preferably, the stamping depth can be set to 3.5mm to 4.5mm, and the thickness of the main channel groove 111 on the flow channel plate 11 after stamping is 1.0mm to 1.5mm.

[0048] The primary groove body 1121 of the auxiliary flow channel groove 112 is formed by one-time stamping of the flow channel plate 11. Preferably, the stamping depth of the primary groove body 1121 is 10 mm to 15 mm. The secondary groove body 1122 is further stamped on the basis of the primary groove body 1121. The stamping depth is set according to the thinning rate of the substrate of the heat exchange plate 1 and the pressure drop of the auxiliary flow channel groove 112. Preferably, the stamping depth of the secondary groove body 1122 is 2 mm to 4 mm.

[0049] Accordingly, the matching groove 121 of the support plate 12 is formed by one-time stamping, and the stamping depth is consistent with the primary groove 1121 of the flow channel plate 11. The support plate 12 and the flow channel plate 11 are welded by an integrated brazing process, and the fit and sealing between the support plate 12 and the flow channel plate 11 after welding need to be ensured; because the support plate 12 is in contact with the battery cell 210, considering the insulation level of the whole package, the surface of the support plate 12 in contact with the battery cell 210 needs to be sprayed with insulation, and the spraying thickness is preferably 150μm to 350μm.

[0050] In a further embodiment of the present invention, Figure 2 and Figure 4As shown, on the support plate 12, the mating groove 121 includes a plurality of first mating grooves 1211 extending along a first direction, and each first mating groove 1211 is provided with a plurality of explosion-proof holes 122 spaced apart along the first direction; the plurality of first mating grooves 1211 are spaced apart in a second direction perpendicular to the first direction to match the arrangement of the main flow channel groove 111 and the auxiliary flow channel groove 112 of the flow channel plate 11.

[0051] Correspondingly, Figure 6 , Figure 8 and Fig. 9 As shown, on the flow channel plate 11, a plurality of second protrusion structures 1125 are arranged in the second-level groove body 1122 at intervals along the first direction, and the second protrusion structure 1125 protrudes in the direction close to the support plate 12 and is connected to the top of the first matching groove 1211. The second protrusion structure 1125 forms a porous connection between the auxiliary flow channels 102 corresponding to the first matching groove 1211, and the heat exchange fluid can flow through the channels between adjacent second protrusion structures 1125 to further promote heat exchange, so that the heat exchange fluid between adjacent auxiliary flow channels 102 is heated more evenly, which is conducive to improving the heat dissipation effect of the heat exchange fluid. In addition, the second protrusion structure 1125 can also play a supporting role to a certain extent to enhance the strength of the auxiliary flow channel groove 112 and prevent the auxiliary flow channel groove 112 from deforming.

[0052] Among them, Figure 8 In the example, the portion between any two adjacent second protruding structures 1125 in the secondary slot body 1122 is a spacer 1126, and each spacer 1126 is arranged opposite to an explosion-proof hole 122, that is, an explosion-proof hole 122 is arranged at a position opposite to each spacer 1126 in the first matching groove 1211, so that the explosion-proof holes 122 and the second protruding structures 1125 are arranged alternately in the first direction. When the sealing diaphragm 123 at the explosion-proof hole 122 is damaged, the heat exchange fluid in the auxiliary flow channel 102 on both sides can flow to the battery cell from the explosion-proof hole 122 opposite to the spacer 1126, which plays a role of irrigation, and the above-mentioned arrangement can also increase the flow rate at the explosion-proof hole 122, so that the heat exchange fluid flowing to the battery cell produces a spray irrigation form, which is conducive to further improving the cooling effect.

[0053] In practical applications, the sealing membrane 123 at the explosion-proof hole 122 can be made of tin foil or aluminum-plastic film materials with low melting point and good sealing performance. The aluminum-plastic film is a composite material composed of an outer nylon tube, an intermediate aluminum foil layer, and an inner heat-sealing layer. The layers are pressed and bonded by adhesives; the surface nylon layer protects the intermediate aluminum foil layer and can prevent the aluminum foil layer from being scratched; the aluminum foil layer can prevent external water vapor from penetrating and prevent heat exchange liquid from seeping out; the inner heat-sealing layer mainly plays a sealing role. Preferably, the thickness of the sealing membrane 123 can be set to 80μm to 150μm; further, according to specific usage needs, a layer of sealing membrane 123 can be set on the inner, rear and outer sides of the explosion-proof hole 122.

[0054] Furthermore, the position of the explosion-proof hole 122 can be matched with the position of the battery cell explosion-proof valve 211, that is, an explosion-proof hole 122 is correspondingly arranged above each battery cell explosion-proof valve 211. When in use, even if thermal runaway occurs in individual battery cells, the high-temperature and high-pressure gas generated by the explosion-proof hole 122 can break through the sealing diaphragm 123 at the corresponding explosion-proof hole 122, so that the heat exchange fluid in the auxiliary flow channel 102 can be poured through the explosion-proof hole 122 to cool down the battery cell that has thermal runaway.

[0055] In a further embodiment of the present invention, Figure 6 , Fig. 9 and Fig.10 As shown, on the flow channel plate 11, the main flow channel 101 includes a first sub-flow channel 1111 and a second sub-flow channel 1112, and the auxiliary flow channel 102 includes a third sub-flow channel 1123 and a fourth sub-flow channel 1124. The second sub-flow channel 1112 is arranged in a serpentine curved line, and the first sub-flow channel 1111 is connected to the second sub-flow channel 1112 end to end, so that the heat exchange fluid can circulate in the main flow channel 101. The fourth sub-flow channel 1124 is arranged in a serpentine curved line, and the third sub-flow channel 1123 is connected to the fourth sub-flow channel 1124 end to end, so that the heat exchange fluid can circulate in the main flow channel 101. Preferably, as Fig. 9 In the example in FIG. 1 , in the second direction, the second sub-channel 1112 of the main channel 101 and the fourth sub-channel 1124 of the auxiliary channel 102 are arranged alternately.

[0056] Furthermore, if Figure 6 , Fig. 9 and Fig.10 As shown, a first liquid inlet 1241 and a first liquid outlet 1242 are provided at a position on the support plate 12 corresponding to the main channel 101, the first sub-channel 1111 of the main channel 101 is connected to the first liquid inlet 1241, and the second sub-channel 1112 of the main channel 101 is connected to the first liquid outlet 1242; wherein, the first liquid inlet 1241 is connected to a first liquid inlet connector 131 for connecting a liquid inlet pipeline; the first liquid outlet 1242 is connected to a first liquid outlet connector 132 for connecting a liquid outlet pipeline.

[0057] Similarly, a second liquid inlet 1243 and a second liquid outlet 1244 are provided at a position on the support plate 12 corresponding to the auxiliary channel 102, the third sub-channel 1123 of the auxiliary channel 102 is connected to the second liquid inlet 1243, and the fourth sub-channel 1124 of the auxiliary channel 102 is connected to the second liquid outlet 1244; wherein, the second liquid inlet 1243 is connected to a second liquid inlet connector 133 for connecting a liquid inlet pipeline; the second liquid outlet 1244 is connected to a second liquid outlet connector 134 for connecting a liquid outlet pipeline.

[0058] like Figure 3 and Fig. 9 In the example, the first liquid inlet joint 131, the first liquid outlet joint 132, the second liquid inlet joint 133 and the second liquid outlet joint 134 are all arranged on the side of the support plate 12 away from the flow channel plate 11, and are welded and fixed to the support plate 12 by brazing, and have good sealing and structural strength. Preferably, the first liquid inlet joint 131 and the first liquid outlet joint 132 are located on the support plate 12 near one end in the first direction, and the second liquid inlet joint 133 and the second liquid outlet joint 134 are located on the support plate 12 near the other end in the first direction.

[0059] like Fig.10 In the example, the flow process of the heat exchange liquid in the main channel 101 is as follows: the heat exchange liquid flows into the first sub-channel 1111 of the main channel 101 through the first liquid inlet joint 131, and then flows to the head and tail ends of the second sub-channel 1112 respectively, and the heat exchange liquid flows to the middle through the two ends of the second sub-channel 1112 respectively, and then flows outward from the first liquid outlet joint 132 in the middle of the second sub-channel 1112. Similarly, the flow process of the heat exchange fluid in the auxiliary channel 102 is as follows: the heat exchange fluid flows into the third sub-channel 1123 of the auxiliary channel 102 through the second liquid inlet joint 133, and then flows to the head and tail ends of the fourth sub-channel 1124 respectively. The heat exchange fluid flows to the middle through the two ends of the fourth sub-channel 1124 respectively, and then flows outward through the second liquid outlet joint 134 in the middle of the fourth sub-channel 1124; wherein, when the sealing diaphragm 123 at the explosion-proof hole 122 is damaged, the heat exchange fluid can flow through the corresponding explosion-proof hole 122 during the flow in the fourth sub-channel 1124 to flow to the battery cell where thermal runaway occurs, forming irrigation cooling.

[0060] In a further embodiment of the present invention, the battery thermal management device further includes a heat conducting member. Figure 7As shown, the heat conductor is arranged on the side of the support plate 12 away from the flow channel plate 11, and the heat conductor is against the support plate 12. When assembled on the battery, the heat conductor contacts the battery cell to conduct heat between the battery cell and the heat exchange plate 1 through the heat conductor. Preferably, the heat conductor is arranged at a position corresponding to the main channel 101 of the heat exchange plate 1 to prevent obstruction of the explosion-proof hole 122 of the auxiliary channel 102, thereby ensuring that the heat exchange fluid in the auxiliary channel 102 can flow normally through the explosion-proof hole 122 to the battery cell when the explosion-proof hole 122 is turned on. Specifically, the heat conductor can be made of thermally conductive glue or other thermally conductive structures. By arranging a heat conductor between the heat exchange plate 1 and the battery cell, the thermal conductivity efficiency can be further improved, which is conducive to achieving rapid cooling and heat dissipation or rapid heating and temperature rise of the battery cell.

[0061] When the battery thermal management device is applied to the battery, the liquid supply state of the main flow channel 101 and the auxiliary flow channel 102 can be controlled accordingly through the corresponding control system. For example, through the corresponding control operation, when the battery thermal management device is started, the main flow channel 101 can be in a normally open state, and the auxiliary flow channel 102 can be in a normally closed state; when the temperature of the battery cell is high but thermal runaway has not occurred, the battery cell can be cooled or heated only by the circulation of the heat exchange liquid in the main flow channel 101 of the heat exchange plate 1; when the temperature of the battery cell rises abnormally and reaches the thermal runaway state, the corresponding pipeline is controlled to supply heat exchange liquid to the auxiliary flow channel 102 of the heat exchange plate 1, so that the heat exchange liquid flows to the thermal runaway battery cell through the explosion-proof hole 122, and the battery cell is cooled in the form of spraying.

[0062] In addition, when the battery cell temperature is low, the heat exchange fluid of the heat exchange plate 1 can exchange heat with the battery cell to heat the battery cell so that the battery cell temperature is kept within a normal range to prevent the battery performance from being affected by low temperature.

[0063] Through the above method, not only can the heating and cooling of the battery under normal working conditions be met, but also two different cooling methods can be used at the same time when the battery has thermal runaway, so that the battery cell temperature can be quickly reduced in a short time, and the reduction effect is more obvious.

[0064] In an embodiment of the second aspect of the present utility model, a battery is provided, such as Figure 7As shown, the battery includes a plurality of battery cells 210 and a battery thermal management device in any embodiment of the first aspect described above. The battery thermal management device is arranged on the top of the plurality of battery cells 210 to exchange heat with the battery cells 210 through the heat exchange plate 1 of the battery thermal management device to achieve cooling and heat dissipation or heating and temperature rise. Among them, when the battery cell 210 has thermal runaway, the sealing diaphragm 123 at the explosion-proof hole 122 of the heat exchange plate 1 is damaged by the high temperature and high pressure, so that the explosion-proof hole 122 is conductive, and the heat exchange fluid in the auxiliary flow channel 102 can flow to the battery cell 210 through the explosion-proof hole 122, so as to quickly cool down the battery cell 210 by pouring, so as to prevent safety accidents such as explosion and fire caused by heat spread.

[0065] It should be noted that the battery cells 210 in this embodiment include but are not limited to VDA size battery cells, MEB size battery cells, non-standard battery cells, short knife battery cells, long knife battery cells, etc., which can all be adapted through the above-mentioned battery thermal management device.

[0066] In practical applications, according to specific assembly requirements, the battery may further include a box for accommodating the battery cell 210, a liquid inlet pipeline, a liquid outlet pipeline, etc. for connecting to the heat exchange plate 1. The battery cell 210 and the heat exchange plate 1 of the battery thermal management device may be connected and fixed through the box, and the main flow channel 101 and the auxiliary flow channel 102 of the heat exchange plate 1 are respectively connected to the outside of the box through corresponding liquid inlet pipelines and liquid outlet pipelines for supplying and reflux of the heat exchange liquid, so as to exchange heat with the battery cell 210 through the circulation of the heat exchange liquid.

[0067] Normally, taking the battery pack as an example, since the battery cell 210 is assembled in a sealed space (such as a sealed space in a box), when thermal runaway occurs, the corresponding sealing diaphragm 123 is broken by the high-temperature and high-pressure gas, and the heat exchange fluid in the auxiliary flow channel 102 flows to the battery cell 210 through the explosion-proof hole 122. The heat exchange fluid then enters the sealed space where the battery cell 210 is located, which can also achieve an immersion cooling effect on the battery cell 210.

[0068] Since the main flow channel 101 and the auxiliary flow channel 102 are independent of each other, when the battery cell 210 has thermal runaway, the heat exchange fluid in the main flow channel 101 always exchanges heat with the battery cell 210 through normal circulation flow, and will not interact with the cooling of the auxiliary flow channel 102. Through the above method, a triple cooling method of contact heat exchange cooling of the main flow channel 101, pouring cooling cooling of the auxiliary flow channel 102, and immersion cooling can be formed, which doubles the cooling and heat dissipation rate of the battery cell, can greatly reduce the possibility of heat spread, and greatly improve the overall safety performance of the battery pack.

[0069] In addition, the battery in this embodiment also has all the beneficial effects of the battery thermal management device in any embodiment of the first aspect mentioned above, which will not be repeated here.

[0070] Of course, in actual applications, in addition to the heat exchange plate 1 in this embodiment, a corresponding heat exchange device can be set at the bottom or side of the battery cell according to the needs of use to form a multi-faceted heat exchange form for the battery cell, which is beneficial to further improve the safety performance of the battery and meet the high-rate charging and discharging requirements of the battery.

[0071] In the embodiment of the third aspect of the present utility model, a battery heat exchange control system is also provided, such as Figure 7 and Fig.11 As shown, the battery heat exchange control system includes the battery in any embodiment of the second aspect, as well as the first liquid supply circuit 310, the second liquid supply circuit 320 and the controller. The main channel 101 of the heat exchange plate 1 of the battery is connected to the first liquid supply circuit 310, so that the heat exchange liquid is supplied to the main channel 101 through the first liquid supply circuit 310, so that the heat exchange liquid circulates in the main channel 101; the auxiliary channel 102 of the heat exchange plate 1 of the battery is connected to the second liquid supply circuit 320, so that the heat exchange liquid is supplied to the auxiliary channel 102 through the second liquid supply circuit 320, so that the heat exchange liquid circulates in the auxiliary channel 102. The controller is respectively connected to the first liquid supply circuit 310 and the second liquid supply circuit 320 to control the liquid supply state of the first liquid supply circuit 310 and / or the second liquid supply circuit 320.

[0072] It should be noted that the controller in this embodiment can be a control module integrated into a battery management system (BMS), or can be an independent module that is connected to the battery management system in communication. The battery management system can monitor the battery cell temperature in real time and perform corresponding control operations through the controller.

[0073] Furthermore, if Fig.11 In the example, the first liquid supply circuit 310 is further provided with a first water pump 311, a first overflow pot 312 and a heat exchanger 313, and the second liquid supply circuit 320 is further provided with a second water pump 321 and a second overflow pot 322. The heat exchanger 313 can be a plate heat exchanger, and when applied to an electric vehicle, the heat exchanger 313 can be connected to the vehicle's air conditioning system 330 to achieve heat exchange.

[0074] In a specific implementation, Fig.11In the example, when the battery heat exchange control system is started, the first liquid supply loop 310 is set as a normally open flow channel, that is, the main flow channel 101 of the heat exchange plate 1 is a normally open flow channel; when the battery management system detects that the temperature of the battery cell is high and needs to be cooled, the battery heat exchange control system is started, and the first water pump 311 in the first liquid supply loop 310 is controlled by the controller to start, so that the heat exchange liquid in the main flow channel 101 of the heat exchange plate 1 circulates and performs conventional heat exchange with the battery cell 210; wherein the heat taken away by the heat exchange liquid is then exchanged with the air-conditioning system 330 through the heat exchanger 313, so that the temperature of the heat exchange liquid drops, and then enters the main flow channel 101 again to cool and dissipate heat for the battery cell 210; or, the heat exchange liquid absorbs the heat of the air-conditioning system 330 through the heat exchanger 313, and then enters the main flow channel 101 to heat the battery cell 210. The second liquid supply circuit 320 is a normally closed flow channel, that is, the auxiliary flow channel 102 of the heat exchange plate 1 is a normally closed flow channel. When thermal runaway does not occur, the second water pump 321 does not work; when the battery management system detects that the temperature of the battery cell is abnormal and reaches a thermal runaway state, the battery management system triggers an alarm signal, and at the same time controls the second water pump 321 to start through the controller, so that the heat exchange liquid in the second liquid supply flow channel and the auxiliary flow channel 102 begins to circulate, which can enhance the heat exchange effect on the battery cell 210; wherein, when the sealing diaphragm 123 at the position of the explosion-proof hole 122 in the auxiliary flow channel 102 is damaged under the action of high temperature and high pressure, the heat exchange liquid in the auxiliary flow channel 102 flows to the battery cell 210 through the explosion-proof hole 122, forming a spraying form and irrigating the battery cell 210 to extinguish the fire and cool it down, so that the battery cell 210 is cooled quickly to prevent fire and explosion accidents caused by heat spread. The second water pump 321 and the second overflow pot 322 can allow the heat exchange liquid to continuously flow into the auxiliary flow channel 102 , and then be poured into the battery cell 210 through the explosion-proof hole 122 .

[0075] It should be noted that, since the exhaust pressure of the battery core explosion-proof valve 211 is usually between 8Kpa and 15Kpa, under this pressure and corresponding temperature, the sealing diaphragm 123 can be broken by the high-temperature and high-pressure gas. In addition, according to specific usage needs, the heat exchange liquid in the second liquid supply circuit 320 can also be replaced by a liquid fire extinguishing agent.

[0076] By setting the structural design of the auxiliary flow channel 102 of the heat exchange plate 1 to be compatible with the flow rate of the heat exchange liquid, when multiple battery cells 210 simultaneously experience thermal runaway, the heat exchange liquid in the auxiliary flow channel 102 can flow to the battery cells 210 experiencing thermal runaway through the corresponding explosion-proof holes 122, thereby avoiding the phenomenon that the heat exchange liquid is only irrigated to a certain battery cell 210 due to uneven distribution of the heat exchange liquid flow, and can provide sufficient heat exchange liquid for spraying and cooling each battery cell 210 experiencing thermal runaway.

[0077] In the embodiment of the fourth aspect of the utility model, there is also provided an electrical device, comprising the battery in any embodiment of the second aspect or the battery heat exchange control system in any embodiment of the third aspect. The battery is used as a power supply device to supply power to the electrical device; the heat exchange plate is used to exchange heat with the battery cells in the battery to achieve cooling or heating of the battery cells. When the battery has thermal runaway, the sealing diaphragm at the explosion-proof hole of the heat exchange plate can be damaged under the action of high temperature and high pressure, so that the heat exchange fluid in the auxiliary flow channel flows through the explosion-proof hole to the battery cell with thermal runaway, forming a spray irrigation to cool down, so that the temperature of the battery cell drops rapidly, and prevents fire and explosion accidents caused by heat spread.

[0078] The electrical equipment in this embodiment includes but is not limited to electric vehicles. When a battery cell experiences thermal runaway, the heat exchange plate can be used to quickly cool the battery cell, thereby controlling the heat spread and providing passengers with sufficient escape time to ensure their personal safety.

[0079] In addition, the electrical equipment in this embodiment also has all the beneficial effects of the battery in any embodiment of the second aspect or the battery heat exchange control system in any embodiment of the third aspect, which will not be repeated here.

[0080] The basic principle of the present invention is described above in conjunction with specific embodiments. However, it should be pointed out that the advantages, strengths, effects, etc. mentioned in the present invention are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present invention. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not limitation, and the above details do not limit the present invention to being implemented by adopting the above specific details.

[0081] The block diagrams of the devices, apparatuses, equipment and systems involved in the present utility model are only illustrative examples and are not intended to require or imply that they must be connected, arranged and configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment and systems can be connected, arranged and configured in any manner. Words such as "including", "comprising", "having" and the like are open words, referring to "including but not limited to" and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to" and can be used interchangeably with them. It should also be noted that in the apparatus and equipment of the present utility model, each component can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent schemes of the present utility model.

[0082] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize some variations, modifications, changes, additions and sub-combinations thereof. The above description of the disclosed aspects is provided to enable any technician in the field to make or use the utility model. Various modifications to these aspects are very obvious to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of the utility model. Therefore, the utility model is not intended to be limited to the aspects shown herein, but in accordance with the widest range consistent with the principles and novel features of this utility model.

[0083] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery thermal management device, characterized in that: include: A heat exchange plate (1) adapted to be disposed corresponding to a top end of a battery core (210); The heat exchange plate (1) is provided with a main flow channel (101) and an auxiliary flow channel (102) which are independent of each other, and the main flow channel (101) and the auxiliary flow channel (102) are both used to be connected to a corresponding liquid supply pipeline; An explosion-proof hole (122) is provided at the bottom of the auxiliary flow channel (102), and the explosion-proof hole (122) is covered with a sealing diaphragm (123). The sealing diaphragm (123) can be damaged under high temperature or high pressure, so that the heat exchange fluid in the auxiliary flow channel (102) can flow to the battery cell (210) through the explosion-proof hole (122).

2. The battery thermal management device according to claim 1, characterized in that: The heat exchange plate (1) comprises a flow channel plate (11) and a support plate (12): A surface of the flow channel plate (11) facing the support plate (12) is provided with a concave main flow channel groove (111) and an auxiliary flow channel groove (112), and the main flow channel groove (111) and the auxiliary flow channel groove (112) are arranged alternately; The support plate (12) is fitted and connected to the flow channel plate (11), the main flow channel groove (111) is matched with the support plate (12) to form the main flow channel (101), and the auxiliary flow channel groove (112) is matched with the support plate (12) to form the auxiliary flow channel (102); Wherein, the explosion-proof hole (122) is provided at a position on the support plate (12) corresponding to the auxiliary flow channel groove (112).

3. The battery thermal management device according to claim 2, characterized in that: The auxiliary flow channel groove (112) comprises a primary groove body (1121) and a secondary groove body (1122) arranged at the bottom of the primary groove body (1121), and the primary groove body (1121) and the secondary groove body (1122) form a step shape; A concave matching groove (121) is provided on a side of the support plate (12) facing away from the flow channel plate (11), so that a first protruding structure (125) is formed on a side of the support plate (12) facing the flow channel plate (11), and the first protruding structure (125) extends into the primary groove body (1121) to form the auxiliary flow channel (102); Wherein, the explosion-proof hole (122) is arranged on the bottom surface of the matching groove (121).

4. The battery thermal management device according to claim 3, characterized in that: The matching groove (121) comprises a plurality of first matching grooves (1211) extending along a first direction, and each of the first matching grooves (1211) is provided with a plurality of explosion-proof holes (122) at intervals along the first direction; A plurality of second protruding structures (1125) are provided in the secondary groove body (1122) at intervals along the first direction, and the second protruding structures (1125) protrude in a direction close to the support plate (12) and are connected to the top of the corresponding first matching groove (1211); The portion between any two adjacent second protruding structures (1125) in the secondary trough body (1122) is a spacer (1126), and each of the spacers (1126) is arranged opposite to one of the explosion-proof holes (122).

5. The battery thermal management device according to claim 3, characterized in that: The main flow channel (101) comprises a first sub-flow channel (1111) and a second sub-flow channel (1112) arranged in a serpentine shape, wherein the first sub-flow channel (1111) and the second sub-flow channel (1112) are connected end to end; The auxiliary flow channel (102) comprises a third sub-flow channel (1123) and a fourth sub-flow channel (1124) arranged in a serpentine shape, and the third sub-flow channel (1123) and the fourth sub-flow channel (1124) are connected end to end.

6. The battery thermal management device according to claim 5, characterized in that: A first liquid inlet (1241) and a first liquid outlet (1242) are provided at a position on the support plate (12) corresponding to the main flow channel (101); the first sub-flow channel (1111) is connected to the first liquid inlet (1241); the second sub-flow channel (1112) is connected to the first liquid outlet (1242); the first liquid inlet (1241) is connected to a first liquid inlet joint (131); and the first liquid outlet (1242) is connected to a first liquid outlet joint (132); A second liquid inlet (1243) and a second liquid outlet (1244) are provided at a position on the support plate (12) corresponding to the auxiliary flow channel (102); the third sub-flow channel (1123) is connected to the second liquid inlet (1243); the fourth sub-flow channel (1124) is connected to the second liquid outlet (1244); the second liquid inlet (1243) is connected to a second liquid inlet joint (133); and the second liquid outlet (1244) is connected to a second liquid outlet joint (134).

7. The battery thermal management device according to any one of claims 2 to 6, characterized in that: Also includes: A heat conducting member is provided on a side of the support plate (12) away from the flow channel plate (11) and abuts against the support plate (12); the heat conducting member is used to conduct heat between the battery core (210) and the support plate (12).

8. A battery, characterized in that: include: A plurality of battery cells (210); The battery thermal management device according to any one of claims 1 to 7 is arranged on top of the plurality of battery cells (210).

9. A battery heat exchange control system, characterized in that: include: The battery as claimed in claim 8; A first liquid supply circuit (310), wherein the main flow channel (101) of the battery is connected to the first liquid supply circuit (310); A second liquid supply circuit (320), the auxiliary flow channel (102) of the battery being connected to the second liquid supply circuit (320); A controller is communicatively connected with the first liquid supply circuit (310) and the second liquid supply circuit (320), and the controller is suitable for controlling the liquid supply status of the first liquid supply circuit (310) and / or the second liquid supply circuit (320).

10. An electrical device, characterized in that: include: The battery as claimed in claim 8; and / or The battery heat exchange control system as claimed in claim 9.

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