435 results about "Battery fluid" patented technology

The invention discloses a power battery thermal management device based on compounding of a double-layer phase change material and a liquid cooling plate, the device comprises a battery box body (1), batteries (2), the liquid cooling plate (3), a micro-channel (4), a first layer of phase change material (5) and a second layer of phase change material (6), the batteries (3) are sequentially arranged in the middle of the battery box body (1) along the thickness direction; the first layer of phase change material (5) and the second layer of phase change material (6) are filled between the battery (2) and the liquid cooling plate (3), and the heat conductivity coefficient of the second layer of phase change material (6) close to the battery is smaller than that of the first layer of phase change material (5) close to the liquid cooling plate. Through two layers of phase change materials with different heat conductivity coefficients, the low-heat-conductivity-coefficient phase change material absorbs heat by virtue of phase change latent heat to serve as a heat transfer buffer area to improve the temperature uniformity of the battery pack, and the high-heat-conductivity-coefficient phase change material strengthens heat transfer to reduce the highest temperature of the battery pack and improve the efficiency and the stability of battery heat management.

The invention discloses a vibration type battery liquid cooling device and a method thereof.The vibration type battery liquid cooling device comprises a sealing box body containing cooling liquid, a battery, a temperature adjusting assembly, a water pump, a vibration assembly and a controller, a gas cavity is formed between the upper surface of the cooling liquid and the inner top wall of the sealing box body, and the battery is detachably installed in the sealing box body and immersed in the cooling liquid; the temperature adjusting assembly is arranged on the inner wall of the sealing box body, the vibration assembly is arranged at the bottom of the outer side of the sealing box body, a water inlet and a water outlet lower than the water inlet are formed in the two sides of the sealing box body respectively, and the water inlet and the water outlet are connected with the water pump through pipelines respectively to form a circulating water path. The controller is in signal connection with the temperature adjusting assembly, the water pump and the vibration assembly. On the basis of circulating water cooling of a traditional battery, vibration generated by the vibration exciter installed below the sealed box body promotes instability of a temperature boundary layer in cooling liquid, the convection heat exchange efficiency of flowing is improved along with enhancement of vibration strength, and the cooling efficiency is improved.

The invention provides a battery liquid cooling system and process, and particularly relates to the technical field of battery thermal management, the system comprises a cooling liquid circulation device, the cooling liquid circulation device comprises a liquid cooling plate and a cooling liquid circulation pipeline, the cooling liquid circulation pipeline is provided with a first reversing valve, and an electric heating device, an air cooling heat dissipation device and a heat exchange pipeline which are connected in parallel; the first reversing valve is used for switching the communication state of the cooling liquid circulation pipeline with the electric heating equipment and the air cooling heat dissipation equipment; the temperature control device comprises refrigerant compression equipment, condensation equipment, heat exchange equipment and a second reversing valve; the second reversing valve is respectively communicated with an outlet of the refrigerant compression equipment, an inlet of the refrigerant compression equipment, the condensing equipment and a first channel of the heat exchange equipment, and is used for switching communication states of the outlet and the inlet of the refrigerant compression equipment with the condensing equipment and the first channel; the condensing device communicates with the first channel, and the second channel of the heat exchange device communicates with the heat exchange pipeline. The comprehensive energy efficiency of the battery liquid cooling system is improved.

The utility model discloses a CCS integrated busbar integrated with a liquid cooling function of a battery pack and the battery pack. The CCS integrated busbar integrating the liquid cooling function of the battery pack comprises a CCS multifunctional support, a round busbar assembly and an FPC assembly which are sequentially arranged from bottom to top, and a hollow flow channel used for providing cooling liquid for battery liquid cooling is formed in the CCS multifunctional support. According to the CCS integrated busbar integrated with the liquid cooling function of the battery pack, the liquid cooling plate and the CCS integrated busbar are combined into a whole by integrating the hollow flow channel for liquid cooling in the CCS integrated busbar, so that a battery cell and a busbar are cooled at the same time, and the battery cell and the busbar can be cooled at the same time.

The invention relates to the technical field of energy storage heat management, and discloses a novel energy storage battery and PCS two-way liquid cooling heat management system which comprises a compressor refrigeration unit, a battery liquid cooling unit, a PCS liquid cooling unit, a sensing assembly, a battery family, a PCS and a control module. The control module is electrically connected with the compressor refrigeration unit, the battery liquid cooling unit, the PCS liquid cooling unit and the sensing assembly and used for collecting real-time data of the sensing assembly and achieving accurate control over the compressor refrigeration unit, the battery liquid cooling unit and the PCS liquid cooling unit. The battery liquid cooling unit is connected with the battery family; the PCS liquid cooling unit is connected with the PCS; the compressor refrigeration unit and the battery liquid cooling unit are connected in parallel through a battery cooler, and the battery liquid cooling unit and the PCS liquid cooling unit are connected in parallel through a heat exchanger. According to the invention, the liquid cooling of the battery and the PCS is integrated in one set of liquid cooling system, so that the installation space is saved, different heat dissipation modes are adopted according to different environment temperatures, the energy consumption ratio of the system is improved, and the energy consumption and the operation cost are saved.

The invention provides an energy storage battery liquid cooling dual-mode heat management and battery storage space heat recovery temperature and humidity coordinated regulation and control system and method. The system is composed of a heat pipe cooling module, a steam compression refrigeration cycle module and a module for waste heat recovery and runner regeneration. The heat pipe cooling module and the circulating pump form a natural cooling loop through the liquid cooling plate and the heat pipe heat exchanger; the vapor compression refrigeration cycle module efficiently and rapidly reduces the temperature of cooling liquid through a phase change refrigeration working medium. And the waste heat recovery module uses condensation waste heat for rotary wheel dehumidification regeneration. The system automatically switches double modes according to the temperature of cooling liquid: heat pipe energy-saving cooling is started when the temperature is lower than or equal to 35 DEG C, steam compression refrigeration is switched when the temperature is higher than 35 DEG C, and condensation waste heat of the two modes preheats regenerated air through a heat pipe heat exchanger, then the temperature is supplemented to the regeneration temperature through an electric heater, a rotating wheel is driven to dehumidify, and dry air is fed into a battery cabin. The method gives consideration to energy efficiency and thermal safety, and is suitable for thermal management and space humidity regulation and control of an energy storage battery system.

The utility model relates to the technical field of battery packs, and particularly discloses a battery liquid cooling system and a battery pack. The system comprises at least two liquid cooling flow path modules, all the liquid cooling flow path modules are sequentially arranged in the first direction, and each liquid cooling flow path module comprises a plurality of coiled pipes and a plurality of expansion connection pipes; all the coiled pipes are arranged side by side at intervals in the first direction, the coiled pipes extend in the second direction, turn-back flow channels extending in the length direction of the coiled pipes are arranged in the coiled pipes, and the liquid inlet ends and the liquid outlet ends of the coiled pipes are arranged at the two ends of the turn-back flow channels correspondingly and located at the same ends of the coiled pipes in the length direction; every two adjacent coiled pipes are in expanded connection and communication through two expanded connection pipes, one of the two expanded connection pipes is a liquid inlet pipe, the other expanded connection pipe is a liquid outlet pipe, the liquid inlet pipe is communicated with the upper liquid inlet end of the coiled pipe, and the liquid outlet pipe is communicated with the upper liquid outlet end of the coiled pipe. According to the system, through structural improvement, flow uniformity and low flow resistance are guaranteed, and the space proportion of the whole system in a battery pack is reduced.

The present invention relates to the field of lithium battery heat dissipation technology, specifically a lithium battery liquid cooling system, comprising a heat convection baffle, with a first heat dissipation module and a second heat dissipation module respectively arranged on both sides of the heat convection baffle; the first heat dissipation module is provided with a first liquid inlet and outlet connection port, the second heat dissipation module is connected to a second liquid inlet and outlet connection port, and the first liquid inlet and outlet connection port and the second liquid inlet and outlet connection port are located at the same end of the heat convection baffle; a reversing groove connecting the first heat dissipation module and the second heat dissipation module is provided on the heat convection baffle; the coolant flows into the first heat dissipation module along the first liquid inlet and outlet connection port, enters the second heat dissipation module through the reversing groove, and flows out along the second liquid inlet and outlet connection port; the coolant flows in opposite phases in the first heat dissipation module and the second heat dissipation module. This system is not only simple in structure and has a good cooling effect, but also does not damage the battery and is easy to install.

The invention relates to the technical field of battery temperature management, and discloses an energy storage battery temperature management system and method based on a liquid cooling technology. The method comprises the following steps: carrying out design parameter population initialization on the battery liquid cooling system to generate a plurality of first liquid cooling system design parameter combinations; performing discharge process heat dissipation simulation and three-dimensional temperature distribution construction on the target energy storage battery based on the plurality of first liquid cooling system design parameter combinations to obtain three-dimensional temperature distribution data; constructing a first relation vector between the number of channels and the temperature, and constructing a second relation vector between the flow of the cooling liquid and the temperature; and inputting the first relation vector and the second relation vector into a multi-task deep learning model for optimal combination parameter prediction to obtain a second liquid cooling system design parameter combination, thereby improving the liquid cooling heat dissipation efficiency of the energy storage battery and the thermal management precision of the battery discharge process.

The invention provides a natural cooling control method and system for an energy storage battery liquid cooling unit, and the method comprises the steps: 1, controlling the energy storage battery liquid cooling unit to start a gravity natural cooling mode, and cooling an energy storage battery in the gravity natural cooling mode; 2, the target state of the energy storage battery liquid cooling unit is collected in real time; 3, when the target state reaches a first preset condition, the energy storage battery liquid cooling unit is controlled to be switched to a liquid pump natural cooling mode, and cooling control is conducted on the energy storage battery according to the liquid pump natural cooling mode; 4, updating the target state in real time based on the cooling result, and when the target state reaches a second preset condition, controlling the energy storage battery liquid cooling unit to be switched to a gravity natural cooling mode; through a double-coupling mode of gravity natural cooling and liquid pump natural cooling, an outdoor natural cold source is fully utilized, the operation energy efficiency of the unit is greatly improved, and energy conservation and emission reduction are achieved.

The invention provides an immersed battery liquid cooling device and an energy storage battery pack, and belongs to the field of battery liquid cooling, the immersed battery liquid cooling device comprises a heat exchange tube, the heat exchange tube is arranged in a shell and located at the top of a battery, and the heat exchange tube is immersed below the liquid level of a heat-conducting medium; the infusion tube is arranged in the shell and located at the bottom of the battery, and through holes are distributed in the infusion tube. The circulating pump pumps the heat-conducting medium; a backflow opening is formed in the position, close to the liquid level of the heat-conducting medium, of the side wall of the shell and communicates with the liquid conveying pipe through a circulating pump, and the heat-conducting medium at the bottom of the shell is sucked through the through hole and then conveyed to the top of the shell through the backflow opening through the circulating pump. The immersion liquid flows through gaps of batteries from top to bottom to form cooling runners, the low-temperature immersion liquid continuously exchanges heat with a battery pack heating in the charging and discharging process, the heat-carrying high-temperature immersion liquid is conveyed by the circulating pump to flow back to the top of the box body again, the heat exchange pipe cools the backflow immersion liquid, and the process is repeated. And the low-temperature immersion liquid can uniformly and quickly flow through the surface of the battery.

The invention relates to a battery liquid cooling temperature prediction method based on a thermal resistance network, and the method comprises the following steps: analyzing the heat dissipation condition of a geometric model, and mastering the overall heat flow direction; node division is carried out on the whole model, and preparation is made for constructing a thermal resistance network; thermal resistance value calculation, wherein a thermal resistance network is divided into battery heat conduction thermal resistance, liquid cooling plate heat conduction thermal resistance, cooling liquid convection thermal resistance and enthalpy change thermal resistance; combing the series-parallel connection relation of the thermal resistance between the network units to form a complete thermal resistance network model; the transient temperature of all nodes can be calculated through a calculation formula by calculating the thermal resistance value between the nodes. According to the method, the temperature distribution of the battery under the liquid cooling effect is rapidly and accurately predicted, a reliable basis is provided for real-time temperature monitoring, the problem that the thermal resistance calculation of the liquid cooling plate is complex is solved, and meanwhile the technical problem that the complex calculation problem caused by follow-up structure and parameter optimization can be rapidly solved through the universality of the method is needed to be solved at present. Compared with the prior art, the device has good market prospect and development space.

The invention relates to a multi-element integrated thermal management system of a pure electric refrigerator car and a regulation and control method, a three-in-one liquid cooling framework is adopted, a passenger compartment air conditioner, power battery thermal management and a refrigerating box refrigerating system are integrated, a passenger compartment liquid cooling loop, a battery liquid cooling loop and a main liquid cooling loop share a cooling liquid circulation loop, the system energy consumption is reduced, and the system energy consumption is reduced. Through main liquid cooling loop sharing, the number of water pumps and valves is reduced, and the cost and the system complexity are reduced; a dynamic priority control strategy and a waste heat recovery mechanism are adopted, the flow direction and flow distribution of cooling liquid are adjusted in real time according to the vehicle running state, and the overall efficiency of the system is optimized; a system loop is switched by means of an electromagnetic valve, so that the refrigeration efficiency is optimized, collaborative optimization of cab heating, cargo compartment refrigeration and power battery temperature control is achieved, and efficient distribution and application of energy are achieved.

An explosion-proof battery cover plate assembly. A protection assembly (5) is provided on an electrolyte injection hole (2), such that the protection assembly (5) wraps around the outer wall of the electrolyte injection hole (2) and forms a vertically-penetrating through hole in the middle for injection of a battery electrolyte; the protection assembly (5) has a structure with a closed bottom and a flow channel (501) formed at the periphery; the lower surface of a cover plate (1) is covered with a plastic protective layer (6) to form a cover over the lower surface of the cover plate (1), such that the cover plate (1) is isolated from the battery electrolyte inside a battery box by means of the plastic protective layer (6). The present device uses the protection assembly (5) arranged inside the electrolyte injection hole (2); during electrolyte injection, the battery electrolyte flows into a cavity of the battery box through the flow channel (501) formed on the side of the protection assembly (5), without directly impacting a battery electrode sheet located in the battery box, thereby providing protection for the battery electrode sheet, prolonging the actual service life of a battery; and the protection assembly (5) can provide an effective seal in combination with a plug nail for sealing, and when expansion occurs in the battery, the protection assembly (5) can serve as an explosion-proof valve for pressure relief effects.

The invention discloses a novel variable flow channel liquid cooling plate applied to an automobile power battery and an energy storage battery. The variable flow channel liquid cooling plate cooling equipment is applied to battery cooling and comprises a plate cooling mechanism, a plate cooling mechanism, a plate cooling mechanism and a plate cooling mechanism, the valve mechanism is arranged above the cold plate mechanism; the locking mechanism is arranged in the valve mechanism; the locking mechanism is used for fixing the valve mechanism after the valve mechanism enters a corresponding working condition; the valve mechanism is matched with the cold plate mechanism with six linear runners arranged side by side left and right to achieve switching of runner types. The optimal flow channel form suitable for the current target can be switched under different targets such as heating or cooling of the battery, the heating and cooling efficiency of the liquid cooling plate on the battery can be remarkably improved, and the required energy consumption is reduced.

The utility model relates to a battery liquid cooling pipeline of an energy storage container. The battery liquid cooling pipeline comprises a plurality of pipes and T-shaped three-way joints, the pipes form a first-stage water inlet pipeline, a first-stage water outlet pipeline, a plurality of second-stage water inlet pipelines, a plurality of second-stage water outlet pipelines, a plurality of third-stage water inlet pipelines and a plurality of third-stage water outlet pipelines which are communicated with one another through T-shaped three-way joints. The beneficial effects of the utility model are that: the utility model discloses a multi-stage parallel pipeline structure of main circuit and branch circuit, battery coolant flow is more balanced, heat dissipation is more stable, battery cell temperature is more balanced, the product life is prolonged, the secondary pipeline is arranged on the same side of battery box, can avoid battery high-voltage wire harness or fire-fighting pipeline etc. The whole pipeline is tidier and more attractive, bubbles in the pipeline can be manually discharged through the exhaust valve, and the circulation efficiency of cooling liquid is improved; the structure of the non-return quick-plug connector and the drain valve three-way connector improves the maintenance efficiency, and the dry condition in the energy storage cabinet is kept.

The invention discloses a performance test system and a performance test method for a liquid cooling plate of an energy storage battery. The system comprises a high and low temperature humid and hot environment box, a high and low temperature liquid cooling testing machine, a condensate water sensor, a first temperature sensor, a second temperature sensor, a pressure sensor, a data recorder and a linkage controller. According to the embodiment of the invention, the performance conditions of the liquid cooling plate under different environmental conditions and cooling conditions (pressure, flow and temperature) in the actual use process can be simulated, weak points of the liquid cooling plate and positions with poor performance can be better identified and improved and optimized in a targeted manner according to actual test data and in combination with simulation results, and the test efficiency is improved. And the comprehensive performance of the energy storage battery system in the actual operation process is improved. The embodiment of the invention is suitable for testing the performance of the liquid cooling plate of the energy storage battery applied to large-scale storage and industrial and commercial storage in the market, and can effectively reduce the waste of manpower and time cost caused by the construction of different test benches for evaluating different performances of different liquid cooling plates.

A device cooling system includes a vehicle-mounted device, a main controller, and a valve set. A liquid inlet pipe and a liquid outlet pipe are disposed on the vehicle-mounted device, the liquid inlet pipe is connected to the valve set, the valve set is connected to an electric drive liquid-cooling loop to form a first path, the valve set is connected to a battery liquid-cooling loop to form a second path, and the valve set is configured to switch a switch status to control to connect the first path or the second path. A temperature and humidity detection apparatus is disposed in the vehicle-mounted device. The main controller is configured to: obtain a dew point temperature based on a temperature and humidity that are detected by the temperature and humidity detection apparatus, and control, based on the dew point temperature, the valve set to switch the switch status.

The utility model relates to an energy storage system, a liquid cooling heat management system thereof and a converter liquid cooling loop. The liquid cooling heat management system comprises a battery liquid cooling loop and a converter liquid cooling loop; the battery liquid cooling loop comprises a first main pipeline and a heat exchange branch; the first main pipeline is used for circulating first cooling liquid so as to cool the battery pack; the heat exchange branch is arranged on the first main pipeline in parallel, and a control valve is arranged on the heat exchange branch and used for controlling the flow of the first cooling liquid flowing into the heat exchange branch; the converter liquid cooling loop comprises a second main pipeline; the second main pipeline is used for circulating a second cooling liquid and is arranged in heat exchange with the heat exchange branch, so that the converter is cooled through heat exchange between the first cooling liquid circulating in the heat exchange branch and the second cooling liquid circulating in the second main pipeline; and the temperature of the first cooling liquid flowing into the heat exchange branch is lower than that of the second cooling liquid flowing in the second main pipeline. In this way, condensation can be avoided in the cooling process of the converter.

The invention discloses a liquid cooling BDU structure, a battery pack device and a vehicle, and relates to the technical field of electric vehicles. Comprising a battery liquid cooling plate; the fast charging module is arranged above the battery liquid cooling plate, and the heating value of elements in the fast charging module is larger than a preset value during working; the discharging module and the fast charging module are arranged in a non-integrated mode, and the heating value is smaller than a preset value when elements in the discharging module work; a copper bar is further arranged between the quick charging module and the battery liquid cooling plate, the copper bar is integrally formed on the BDU lower shell in an injection molding mode, one face of the copper bar is exposed out of the BDU lower shell, and the surface of the exposed portion of the copper bar is flush with the BDU lower shell and serves as a cooling face to be in contact with the battery liquid cooling plate. According to the BDU, elements with large heat productivity are integrated in the fast charging module, decoupling arrangement of the elements with large heat productivity and elements with small heat productivity is achieved, the copper bar heat dissipation structure matched with the fast charging module is arranged below the fast charging module, compared with an existing integrated BDU, the BDU has the smaller size, it can be better ensured that the planeness of the cooling face meets the requirement, and the cooling efficiency is improved. And the heat conduction efficiency is higher.

The utility model provides a liquid cooling plate and a battery, the liquid cooling plate is used for exchanging heat with a battery cell in the battery, the liquid cooling plate comprises: a runner plate provided with a first groove; the sealing plate is connected with the runner plate and is provided with a first surface and a second surface, the first surface faces the runner plate, the first surface covers the first groove to form a runner for circulation of a heat exchange medium, and the second surface deviates from the runner plate and faces the battery cell; wherein the second surface is provided with a second groove, the second groove and the first groove are staggered in position, and the second groove is constructed to be a pressure relief space or a pressure relief channel and is used for corresponding to the position of an anti-explosion valve of the battery cell. According to the technical scheme, under the condition that effective work of the liquid cooling plate and the anti-explosion valve is not affected, the discharged object of the anti-explosion valve can be cooled, high safety is achieved, the liquid cooling plate and the anti-explosion valve can be arranged on the same surface of the battery cell, space is saved, the internal structure of the battery is compact, and the miniaturization development requirement of the battery is met.

The present application relates to the technical field of battery temperature management, and discloses an energy storage battery temperature management system and method based on liquid cooling technology. The method includes: initializing a population of design parameters of the battery liquid cooling system to generate multiple first combinations of liquid cooling system design parameters; respectively performing heat dissipation simulation during the discharging process of the target energy storage battery and constructing a three-dimensional temperature distribution based on the multiple first combinations of liquid cooling system design parameters to obtain three-dimensional temperature distribution data; constructing a first relationship vector between the number of channels and the temperature and constructing a second relationship vector between the coolant flow rate and the temperature; inputting the first relationship vector and the second relationship vector into a multi-task deep learning model to predict the optimized combination parameters, so as to obtain a second combination of liquid cooling system design parameters, thereby improving the liquid cooling heat dissipation efficiency of the energy storage battery and the thermal management accuracy during the battery discharging process.

The invention provides a battery cooling system matching type selection simulation method and device, equipment and a medium, and belongs to the technical field of battery cooling. An equivalent circuit model is built based on battery physical property parameters, and a battery cooling system is built; constructing a radiator heat dissipation system simulation model, setting variables for the structural size of the radiator, and determining the feasibility of a liquid cooling radiator scheme based on the fast charging time; if the structural size of the radiator meets the whole vehicle arrangement space, it is determined that the liquid side of the battery is cooled through the radiator; and if the structural size of the radiator does not meet the whole vehicle arrangement space, it is determined that the liquid side of the battery is cooled through the air conditioner, a thermodynamic cycle diagram of the air conditioning system is constructed, and matching type selection is conducted on parts in the air conditioning system. Therefore, the performance of various cooling schemes can be quickly evaluated and compared through simulation, and the design efficiency is improved; and various performances of the battery cooling system can be optimized, and the reliability and the stability of the system are improved.

The invention discloses a corrugated power battery liquid cooling plate structure optimization design method, which comprises the following steps: constructing a three-dimensional model of a battery liquid cooling plate connected with a battery module through a heat conduction pad, obtaining related structure parameters of the model, and determining variable parameters to be optimized; establishing a multi-objective optimization calculation model; carrying out simulation analysis on the three-dimensional model, and calculating to obtain performance data of the battery liquid cooling plate with a corresponding value; and a Pareto solution set of multi-objective optimization is obtained, an optimal solution is searched in the Pareto frontier solution set, and the optimal value of each structure parameter is obtained. The method has the beneficial effects that the method analyzes the influence of different structure parameters on a plurality of evaluation indexes through the combination of the fine design of the structure parameters and the multi-objective optimization algorithm, and determines the required optimal optimization scheme structure parameter combination, and the finally obtained optimization scheme is small in pressure drop change, can eliminate the heat dissipation dead angle, and can improve the heat dissipation efficiency. Uniform flow distribution of each runner is ensured, and the heat exchange capability is improved.

The utility model provides a lithium battery liquid cooling plate and a lithium battery. The lithium battery liquid cooling plate comprises a plate body, a liquid cooling channel is arranged in the plate body, and the liquid cooling channel is provided with a liquid inlet and a liquid outlet; and the fin group is arranged in the liquid cooling flow channel and is used for carrying out turbulent flow on the cooling liquid in the liquid cooling flow channel, the fin group comprises a plurality of sub-fins, and the extension directions of at least two sub-fins in the plurality of sub-fins are arranged at an angle. The lithium battery liquid cooling plate solves the problem of limited heat dissipation effect of the lithium battery liquid cooling plate in the prior art.

The utility model discloses a high-temperature-resistant insulating cover film for a liquid cooling plate of a new energy battery. The high-temperature-resistant insulating cover film comprises a protective film layer, an adhesive layer, an insulating base material layer and a coating which are sequentially overlapped. When the high-temperature-resistant insulating cover film is used, the protective film is torn off, and the adhesive layer of the insulating cover film is attached to the surface of a liquid cooling plate in a hot roller attaching mode, so that excellent insulating performance is provided for the liquid cooling plate of a new energy battery; meanwhile, a layer of high-adhesion weather-resistant coating is introduced to the surface of the insulating base material layer in contact with the battery heat-conducting structural adhesive, so that better adhesive force can be provided for subsequent adhesion of the battery heat-conducting structural adhesive.

The utility model belongs to the technical field of batteries, and particularly relates to a battery, a battery module and electric equipment. The battery comprises a battery body, an internal cavity contains battery liquid, the wall surface of the battery body is provided with a first through hole and a second through hole, the first through hole is covered with a first pressure film, and the second through hole is covered with a second pressure film; the first cavity is arranged on the outer side of the battery body and is connected with the first through hole; the second cavity is arranged on the outer side of the battery body and connected with the second through hole, and supplement liquid is contained in the second cavity; the first pressure film is suitable for being damaged under the action of pressure, and enables the first cavity to communicate with the inner cavity; the second pressure film is suitable for being damaged under the action of pressure and enables the second cavity to be communicated with the inner cavity so that the supplementary liquid can flow into the inner cavity. According to the utility model, the pressure relief and liquid supplement functions of the internal chamber can be realized, the internal space of the battery body is not occupied, and the improvement of the battery performance and the reduction of the manufacturing cost are facilitated.

The invention discloses a thermal management system of an electric truck. The thermal management system of the electric truck comprises an air conditioner compressor refrigeration subsystem, a battery liquid cooling subsystem and an electrically-driven cooling liquid subsystem, the battery liquid cooling subsystem comprises a battery pack, and the battery pack is sequentially connected with an electric heater, a first battery cooler, a first battery water pump, a first multi-way water valve and a second multi-way water valve in series to form a first battery heat exchange loop. The battery pack is sequentially connected with a second battery water pump and a second battery cooler in series through a second multi-way water valve to form a second battery heat exchange loop, the first battery heat exchange loop is coupled with the air conditioner compressor refrigeration subsystem through a first battery cooler, and the first battery heat exchange loop is coupled with the electric drive cooling liquid subsystem through a first multi-way water valve. And the battery heat exchange loop II is coupled with a battery auxiliary cooling refrigerant subsystem through a battery cooler II. The problem that in the prior art, the heat dissipation requirement during charging of a heavy truck battery pack cannot be met is solved.

The invention discloses an energy storage battery liquid cooling temperature control method, an energy storage battery management system and an energy storage battery system. The energy storage battery liquid cooling temperature control method comprises the following steps: a BMS calculates a battery heat production rate in real time according to a pre-established dynamic thermal resistance model of a battery; the BMS determines the internal temperature distribution of the battery cell based on the real-time surface temperature of the battery cell in combination with the calculated heat production power of the battery; when the BMS monitors that the surface temperature of the battery cell reaches a preset cooling trigger threshold value, a flow / compressor instruction is output; and the liquid cooling system dynamically adjusts the flow of the cooling liquid and / or the power of the compressor according to the flow / compressor instruction, so that the flow of the cooling liquid of each liquid cooling branch is dynamically matched with the battery core internal heat source corresponding to the battery core internal temperature distribution on the basis that the battery core temperature is maintained in the preset interval. The liquid cooling trigger temperature can be more accurate, the cooling liquid flow and a heat source formed by local hot spots can be controlled in a matched mode, and the situation that the local temperature is too high due to uneven battery cooling is avoided.

The invention provides a thermal management system and a vehicle. The thermal management system comprises a battery flow path, an electric drive flow path, an expansion kettle and a switching valve. The battery flow path includes a battery fluid pump. The electric drive flow path comprises an electric drive liquid pump. The expansion kettle comprises a first liquid supplementing opening and a second liquid supplementing opening which are communicated. When the switching valve is in a first state, the battery flow path is communicated with the electric drive flow path, so that a first cooling liquid loop flowing through the battery flow path and the expansion kettle and a second cooling liquid loop flowing through the electric drive flow path and the expansion kettle are formed. And the battery liquid pump is used for realizing circulating flow of the cooling liquid in the first cooling liquid loop. And the electric drive liquid pump is used for realizing circulating flow of the cooling liquid in the second cooling liquid loop. When the switching valve is in the second state, the battery flow path is separated from the electric drive flow path, and the expansion kettle is used for supplementing water to the battery liquid pump and the electric drive liquid pump through the first liquid supplementing opening and the second liquid supplementing opening respectively. Therefore, the heat leakage amount of the heat management system is reduced.