A linkage temperature control system for new energy battery clusters

Abstract

The present invention relates to the technical field of new energy batteries, and in particular to a linkage temperature control system of a new energy battery cluster. The linkage temperature control system of the new energy battery cluster is used to control the temperature of the battery cluster. The battery cluster includes N batteries, each battery is provided with a first flow path and a second flow path for circulating a coolant, and the linkage temperature control system of the new energy battery cluster includes a cooling module and an execution module. The cooling module includes N cooling units, and the cooling units correspond to the batteries one by one. The cooling units are used to reduce the temperature of the batteries. The execution module is used to adjust the cooling units corresponding to the batteries to execute different cooling cycles according to the temperature parameters of the batteries, and to make the liquid cooling cycles between the multiple batteries generate linkage, so as to pass the coolant of the battery with excess cooling capacity into the battery with insufficient cooling capacity, thereby improving the utilization rate of the liquid cooling system and reducing the temperature fluctuation of the battery cluster.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy batteries, and in particular to a linkage temperature control system of a new energy battery cluster. Background Art

[0002] The application of large-scale renewable energy in new power systems requires energy storage systems to be used as flexible dispatching resources to participate in the complementary use of renewable energy and the safe and stable control of power system operation. Currently used large-scale battery energy storage systems generally have hidden safety hazards in the operation of the batteries themselves. One of the main problems is the inconsistency of the batteries themselves and the influence of temperature characteristics, which challenges the safety of battery energy storage systems. Therefore, it is necessary to effectively improve the battery temperature consistency control capability to ensure that the battery modules in the battery energy storage system meet the temperature consistency range requirements during operation and improve the safety of the battery energy storage system.

[0003] The temperature control of the battery energy storage system needs to achieve the temperature consistency of each battery pack in the battery cluster within the allowable range. When any battery cell or battery pack exceeds the allowable temperature consistency range, the entire battery cluster stops operating, affecting the overall efficiency of the system and creating a short-board effect for the energy storage system.

[0004] A Chinese invention patent with publication number CN114050352A discloses a box-type power supply non-contact liquid cooling system and control method. The box-type power supply non-contact liquid cooling system detects the temperature of the battery pack through a temperature sensor and transmits the temperature information of the battery pack to a refrigeration device. The refrigeration device adjusts the flow rate of the coolant flowing into the circulation pipeline according to the temperature information of the battery pack, thereby reducing the temperature of the corresponding battery pack.

[0005] In order to keep the temperature of the batteries in the battery cluster within the allowable range, the above-mentioned box-type power supply non-contact liquid cooling system usually needs to set appropriate coolant temperature and flow rate respectively. However, if there is a large temperature difference between multiple batteries, it is easy to cause insufficient heat exchange for water cooling of some batteries and excessive heat exchange for water cooling of some batteries, thereby reducing the utilization rate of the liquid cooling system and increasing the energy consumption of the management and control system itself. Summary of the invention

[0006] Based on this, it is necessary to provide a linkage temperature control system for a new energy battery cluster to address the problem that when there is a large temperature difference between multiple batteries in the current battery cluster temperature control system, it is easy to cause insufficient water cooling heat exchange for some batteries, while excessive water cooling heat exchange for some batteries, which reduces the utilization rate of the liquid cooling system and increases the energy consumption of the management control system itself.

[0007] The above purpose is achieved through the following technical solutions:

[0008] A linkage temperature control system for a new energy battery cluster, used to control the temperature of the battery cluster, the battery cluster includes N batteries, each of which is provided with a first flow path and a second flow path for the circulation of a coolant; the linkage temperature control system for the new energy battery cluster includes an acquisition module, a cooling module and an execution module, the acquisition module is used to acquire the temperature parameters of the N batteries The cooling module includes N cooling units, each of which corresponds to the battery. The cooling unit is used to pass a coolant into the first flow path and / or the second flow path to reduce the temperature of the battery. The execution module is used to perform the following steps:

[0009] Step S100, obtaining the temperature parameter of the i-th battery , i=1, 2 to N;

[0010] Step S200, determining the temperature parameter of the i-th battery Is it greater than the first preset value? ;

[0011] Step S300: If yes, determine Is the difference greater than the second preset value? ;

[0012] Step S400: If yes, the cooling unit corresponding to the i-th battery performs a first cooling cycle, wherein the first cooling cycle is that the coolant in the cooling unit corresponding to the i-th battery flows through the first flow path and the second flow path on the i-th battery at the same time;

[0013] Step S500: If not, determine whether there is more than one battery temperature parameter among the N batteries. Both are greater than the first preset value ;

[0014] Step S600, if yes, determine whether the i-th battery is a supported battery or a supporting battery;

[0015] Step S610, if the i-th battery is a supported battery, the coolant in the cooling unit corresponding to the i-th battery flows through the first flow path corresponding to the i-th battery, and the second flow path corresponding to the i-th battery receives the coolant from the first flow path on a supporting battery;

[0016] Step S620: If the i-th battery is a supporting battery, the coolant in the cooling unit corresponding to the i-th battery flows through a first flow path on the i-th battery and then flows into a second flow path on one of the supported batteries.

[0017] Furthermore, after step S600, the method further includes:

[0018] Step S601: All temperature parameters Greater than the first preset value The batteries are sorted in descending order according to the temperature parameters, and the battery with the largest temperature parameter is marked as a reserve battery, and the temperature parameter of the reserve battery is determined. minus Is the difference greater than the third preset value? ;

[0019] Step S602: If yes, mark the standby battery as a supported battery.

[0020] Furthermore, after step S602, the method further includes:

[0021] Step S603, obtaining all temperature parameters except the standby battery Greater than the first preset value The temperature parameter of the coolant at the first flow path outlet of the battery , M is the temperature parameter of all batteries except the reserve battery Greater than the first preset value The number of batteries and calculate them separately The difference between

[0022] Step S604, obtaining all temperature parameters except the standby battery Greater than the first preset value The distance between the battery and the supported battery ;

[0023] Step S605: Calculate the matching score according to the relationship , the relationship is ,in, For all temperature parameters except the reserve battery Greater than the first preset value The temperature parameter of the coolant at the inlet of the first flow path of the battery; E is the total length of N batteries; a and b are weights, and a+b=1;

[0024] Step S606: Score the matching degree Sort them in descending order, and mark the battery with the highest matching score as the supporting battery.

[0025] Furthermore, the value of a and The difference is positively correlated.

[0026] Furthermore, after step S606, the method further includes:

[0027] Step S607: all temperature parameters of the supported battery and the supporting battery and between the supported battery and the supporting battery are matched. Greater than the first preset value After the battery is excluded, steps S601 to S606 are repeatedly executed until no corresponding supported battery and supporting battery are selected.

[0028] Furthermore, the interlocking temperature control system of the new energy battery cluster includes a common branch, which is respectively connected to the first flow path and the second flow path. The common branch includes multiple pipelines. When a pipeline has no corresponding supported battery and supporting battery to be selected, the matched supported battery and supporting battery are excluded, and steps S601 to S607 are repeated on the next pipeline until no corresponding supported battery and supporting battery are selected.

[0029] Furthermore, the maximum local temperature difference that the battery can allow is , the temperature of the coolant in the cooling unit and Negative correlation.

[0030] Furthermore, the maximum flow rate of the coolant in the cooling unit and Positive correlation.

[0031] Furthermore, the linkage temperature control system of the new energy battery cluster also includes an alarm module. When the temperature parameter of the i-th battery Greater than the fourth preset value When the alarm module sounds an alarm.

[0032] Furthermore, the linkage temperature control system of the new energy battery cluster also includes a refrigeration module, the refrigeration module includes N refrigeration units, the refrigeration units correspond to the cooling units one by one, and the refrigeration units are used to reduce the temperature of the coolant in the cooling units.

[0033] The beneficial effects of the present invention are:

[0034] The present invention provides a linkage temperature control system for a new energy battery cluster, which is used to control the temperature of the battery cluster, and adjust the cooling units corresponding to the batteries to execute different cooling cycles according to the temperature parameters of the batteries, and enable the liquid cooling cycles between multiple batteries to be linked, thereby passing the coolant of the batteries with excess cooling capacity into the batteries with insufficient cooling capacity, thereby improving the utilization rate of the liquid cooling system and reducing the temperature fluctuation of the battery cluster.

[0035] Furthermore, by setting the value of a and The difference is positively correlated, that is, The larger the difference, the larger the value of a. The larger the difference is, the higher the temperature of the supported battery itself is, and the more cooling support is needed. By increasing the value of a and increasing the weight of cooling, the supported battery can be cooled down quickly to avoid the short board effect of the energy storage system.

[0036] Furthermore, by setting the temperature of the coolant in the cooling unit and Negatively correlated, the maximum flow rate of the coolant in the cooling unit and There is a positive correlation. When the temperature of the battery rises, the coverage area and heat dissipation rate of the coolant will usually increase accordingly, resulting in an increase in the coolant temperature. However, if the coolant temperature rises too quickly and the temperature difference is too large, it may cause a large temperature difference between the various parts of the battery, thereby causing safety risks such as local overheating. In this case, appropriately adjusting the design parameters of the liquid cooling system and controlling factors such as the flow rate and flow rate of the coolant can better balance the relationship between the coolant temperature and the battery temperature, thereby ensuring the safety of the battery while improving the heat dissipation efficiency.

[0037] Furthermore, by setting the number of pipelines included in the common branch to be multiple, and when a pipeline has no corresponding supported battery and supporting battery selected, the matched supported battery and supporting battery are excluded, and steps S601 to S607 are repeated on the next pipeline until no corresponding supported battery and supporting battery are selected, thereby improving the applicability of the linkage temperature control system of the new energy battery cluster.

[0038] Furthermore, by setting the linkage temperature control system of the new energy battery cluster to also include an alarm module, when the temperature parameter of the i-th battery Greater than the fourth preset value When the fault occurs, the alarm module will sound an alarm to facilitate maintenance and reduce losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic diagram of the flow structure of an execution module of a linkage temperature control system for a new energy battery cluster provided by an embodiment of the present invention;

[0040] Figure 2 This is a working principle diagram of a linkage temperature control system for a new energy battery cluster provided by an embodiment of the present invention.

[0041] in:

[0042] 100. Battery cluster;

[0043] 200, liquid inlet pipe; 210, liquid outlet pipe; 220, connecting pipe; 230, public branch; 231, first flow pipe; 232, second flow pipe; 233, third flow pipe; 240, multi-way pipe valve. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0045] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0046] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0047] like Figure 2 As shown, the linkage temperature control system of the new energy battery cluster provided by one embodiment of the present invention is used to control the temperature of the battery cluster 100, the battery cluster 100 includes N batteries, the N batteries are arranged side by side, and each battery is provided with a first flow path and a second flow path for circulating the coolant; the linkage temperature control system of the new energy battery cluster is configured to include a common branch 230, an acquisition module, a cooling module and an execution module, the common branch 230 is connected to the first flow path and the second flow path respectively; the acquisition module is used to obtain the temperature parameters of the N batteries The cooling module includes N cooling units, each cooling unit corresponds to a battery on a one-to-one basis, and the cooling unit is used to introduce cooling liquid into the first flow path and / or the second flow path to reduce the temperature of the battery.

[0048] Specifically, the inlet of the first flow path is the liquid inlet pipe 200, and the outlet of the first flow path is divided into at least two unconnected pipelines through a multi-way pipe valve 240, one pipeline is connected to the liquid outlet pipe 210, and the other pipeline is connected to the common branch 230; the inlet of the second flow path is a connecting pipe 220, and the outlet of the second flow path is divided into at least two unconnected pipelines through a multi-way pipe valve 240, one pipeline is connected to the liquid outlet pipe 210, and the other pipeline is connected to the common branch 230; two groups of coolant circulation flow paths are formed on each battery, and the first group of coolant circulation flow paths are connected between the input end of the cooling unit and the containing box, and the containing box is used to store the coolant, and the output end of the cooling unit is connected to the liquid inlet pipe 200 is connected, the liquid inlet pipe 200 is connected with the liquid outlet pipe 210 through the first flow path, and the liquid outlet pipe 210 is connected with the containing box; the flow path of the second group of coolant circulation is that the input end of the cooling unit is connected with the containing box, the output end of the cooling unit is connected with the connecting pipe 220 through a three-way valve, the other port of the three-way valve is connected with the containing box, the connecting pipe 220 is connected with the multi-way pipe valve 240 through the second flow path, and the multi-way pipe valve 240 has at least two output ends, one output end is connected with the liquid outlet pipe 210, and the other output end is connected with the common branch 230; and solenoid valves are provided at the connection points of different pipelines and the connection points between different devices, and the solenoid valves are used to open or close the current pipeline.

[0049] like Figure 1 As shown, Figure 1 This is a schematic diagram of the flow structure of an execution module of a linkage temperature control system of a new energy battery cluster provided by an embodiment of the present invention. The execution module is used to perform the following steps:

[0050] Step S100, obtaining the temperature parameter of the i-th battery , i=1, 2 to N;

[0051] Specifically, the temperature parameter of the i-th battery can be obtained through the acquisition module , where i=1, 2 to N.

[0052] It can be understood that the acquisition module can be configured to include temperature sensors, the number of the temperature sensors is the same as the number of batteries, the temperature sensors and the batteries correspond one to one, and the temperature sensors are arranged on the batteries.

[0053] Step S200, determining the temperature parameter of the i-th battery Is it greater than the first preset value? ;

[0054] First preset value is the temperature of the battery under normal working conditions. When the temperature parameter of the i-th battery Greater than the first preset value When , it indicates that the operating temperature of the i-th battery is abnormal; the specific first preset value The value can be determined according to the type and specification of the battery and is not limited here.

[0055] Step S300: If yes, determine Is the difference greater than the second preset value? ;

[0056] Second preset value The value represented by the maximum cooling efficiency of the cooling liquid in the cooling unit corresponding to the battery flows through the first flow path and receives the cooling liquid from the first flow path on a supporting battery through the common branch 230. The difference is greater than the second preset value , it means that the cooling liquid in the cooling unit corresponding to the battery flows through the first flow path and receives the cooling liquid from the first flow path on a supporting battery through the common branch 230, which cannot lower the temperature of the i-th battery; the specific second preset value The value can be determined according to the type and specification of the battery and is not limited here.

[0057] Step S400: If yes, the cooling unit corresponding to the i-th battery performs a first cooling cycle, wherein the first cooling cycle is that the coolant in the cooling unit corresponding to the i-th battery flows through the first flow path and the second flow path on the i-th battery at the same time;

[0058] when The difference is greater than the second preset value When the cooling unit corresponding to the i-th battery is set to perform a first cooling cycle, the first cooling cycle is that the coolant in the cooling unit corresponding to the i-th battery flows through the first flow path and the second flow path on the i-th battery at the same time, so that the cooling unit corresponding to the i-th battery cools the i-th battery with the maximum cooling efficiency.

[0059] Step S500: If not, determine whether there is more than one battery temperature parameter among the N batteries. Both are greater than the first preset value ;

[0060] like The difference is not greater than the second preset value , then when there are more than two batteries with temperature parameters of N batteries Both are greater than the first preset value At this time, the liquid cooling cycle between different batteries can produce linkage.

[0061] Step S600, if yes, determine whether the i-th battery is a supported battery or a supporting battery;

[0062] Step S610, if the i-th battery is a supported battery, the coolant in the cooling unit corresponding to the i-th battery flows through the first flow path corresponding to the i-th battery, and the second flow path corresponding to the i-th battery receives the coolant from the first flow path on a supporting battery;

[0063] Specifically, when the i-th battery is a supported battery, on the one hand, the cooling unit corresponding to the i-th battery allows the coolant to flow in from the liquid inlet pipe 200, and cools the i-th battery through the first flow path, and then is discharged from the liquid outlet pipe 210 and returns to the containing box; on the other hand, the coolant from the first flow path on a supporting battery is received through the common branch 230, and cools the i-th battery through the second flow path, and then is discharged from the connecting pipe 220 and returns to the containing box, thereby lowering the temperature of the i-th battery.

[0064] Step S620: If the i-th battery is a supporting battery, the coolant in the cooling unit corresponding to the i-th battery flows through a first flow path on the i-th battery and then flows into a second flow path on one of the supported batteries.

[0065] Specifically, when the i-th battery is a supporting battery, on the one hand, the cooling unit corresponding to the i-th battery allows the coolant to flow in from the liquid inlet pipe 200, and cools the i-th battery through the first flow path, and then flows into the second flow path on a supported battery through the common branch 230, thereby cooling the supported battery.

[0066] The execution module can adjust the cooling unit corresponding to the battery to execute different cooling cycles according to the temperature parameters of the battery, and enable the liquid cooling cycles between multiple batteries to be linked, thereby passing the coolant of the battery with excess cooling capacity into the battery with insufficient cooling capacity, thereby improving the utilization rate of the liquid cooling system and reducing the temperature fluctuation of the battery cluster 100.

[0067] In some embodiments, after step S600, the method further includes:

[0068] Step S601: All temperature parameters Greater than the first preset value The batteries are sorted in descending order according to the temperature parameters, and the battery with the largest temperature parameter is marked as a reserve battery, and the temperature parameter of the reserve battery is determined. minus Is the difference greater than the third preset value? ;

[0069] The third preset value is a value represented by the maximum cooling efficiency of the coolant in the cooling unit corresponding to the battery flowing through the first flow path, and the specific third preset value is The value can be determined according to the type and specification of the battery and is not limited here.

[0070] Step S602: If yes, mark the standby battery as a supported battery.

[0071] When the temperature parameters of the reserve battery minus The difference is greater than the third preset value When , it means that the coolant in the cooling unit corresponding to the spare battery flowing through the first flow path cannot lower the temperature of the spare battery, so the spare battery needs the support of the liquid cooling cycle of other batteries.

[0072] In a further embodiment, after step S602, the method further includes:

[0073] Step S603, obtaining all temperature parameters except the standby battery Greater than the first preset value The temperature parameter of the coolant at the first flow path outlet of the battery , M is the temperature parameter of all batteries except the reserve battery Greater than the first preset value The number of batteries and calculate them separately The difference between

[0074] Specifically, by setting a temperature sensor at the outlet of the first flow path of each battery, the temperature sensor can sense the temperature parameter of the coolant at the outlet of the first flow path of each battery in real time. ; The larger the difference is, the greater the remaining cooling capacity of the coolant after cooling the battery through the first flow path.

[0075] Step S604, obtaining all temperature parameters except the standby battery Greater than the first preset value The distance between the battery and the supported battery ;

[0076] Specifically, the N batteries can be numbered along the arrangement direction of the N batteries, and the temperature parameters of all batteries except the standby battery can be known or calculated by the numbering. Greater than the first preset value The distance between the battery and the supported battery .

[0077] Step S605: Calculate the matching score according to the relationship , the relationship is ,in, For all temperature parameters except the reserve battery Greater than the first preset value The temperature parameter of the coolant at the inlet of the first flow path of the battery; E is the total length of N batteries; a and b are weights, and a+b=1;

[0078] Specifically, by setting a temperature sensor at the inlet of the first flow path of each battery, the temperature sensor can sense the temperature parameter of the coolant at the inlet of the first flow path of each battery in real time. The larger the weight a is, the more the cooling capacity contained in the coolant after cooling the battery through the first flow path is mainly determined; the larger the weight b is, the more the distance between the battery and the supported battery is mainly determined.

[0079] Step S606: Score the matching degree Sort them in descending order, and mark the battery with the highest matching score as the supporting battery.

[0080] Specifically, the coldness contained in the coolant after cooling the battery through the first flow path and the distance between the battery and the supported battery are comprehensively considered, and the battery with the largest matching score is marked as the supporting battery.

[0081] In a further embodiment, the value of a is set to The difference is positively correlated. The larger the difference is, the higher the temperature of the supported battery itself is, and the more cooling support is needed. By increasing the value of a and increasing the weight of cooling, the supported battery can be cooled down quickly to avoid the short board effect of the energy storage system.

[0082] In some embodiments, after step S606, the method further includes:

[0083] Step S607: all temperature parameters of the supported battery and the supporting battery and between the supported battery and the supporting battery are matched. Greater than the first preset value After the battery is excluded, steps S601 to S606 are repeatedly executed until no corresponding supported battery and supporting battery are selected.

[0084] By matching the supported battery and the supporting battery and all the temperature parameters between the supported battery and the supporting battery Greater than the first preset value The batteries are excluded so that there is no intersection between the common branch 230 used by the multiple groups of supported batteries and the supporting batteries, thereby avoiding conflict in the use of the common branch 230.

[0085] In a further embodiment, the common branch 230 includes multiple pipelines. When a pipeline has no corresponding supported battery and supporting battery selected, the matched supported battery and supporting battery are excluded, and steps S601 to S607 are repeated on the next pipeline until no corresponding supported battery and supporting battery are selected.

[0086] Specifically, the number of pipes included in the common branch 230 can be set to three, and the three pipes are set in parallel. For the convenience of description, the three pipes are named as the first flow pipe 231, the second flow pipe 232 and the third flow pipe 233. First, only the first flow pipe 231 is enabled. In the process of repeatedly executing steps S601 to S607, when the temperature parameter Greater than the first preset value When the battery has no match on the first flow tube 231 or there is a cross in the match, the second flow tube 232 is enabled, and in the process of repeatedly executing steps S601 to S607, when the temperature parameter Greater than the first preset value When the battery has no match on the second flow tube 232 or there is a cross in the match, the third flow tube 233 is enabled until the temperature parameter Greater than the first preset value When the battery has no match on the second flow tube 232 or there is a cross in the match, or in other words, no corresponding supported battery and supporting battery are selected.

[0087] Specifically, the outlet of the first flow path is divided into four unconnected pipelines by a multi-way pipe valve 240, one pipeline is connected to the liquid outlet pipe 210, one pipeline is connected to the first circulation pipe 231, one pipeline is connected to the second circulation pipe 232, and one pipeline is connected to the third circulation pipe 233; the inlet of the second flow path is a connecting pipe 220, and the outlet of the second flow path is divided into four unconnected pipelines by a multi-way pipe valve 240, one pipeline is connected to the liquid outlet pipe 210, one pipeline is connected to the first circulation pipe 231, one pipeline is connected to the second circulation pipe 232, and one pipeline is connected to the third circulation pipe 233.

[0088] In some embodiments, the maximum local temperature difference that the battery can tolerate is , the temperature of the coolant in the cooling unit and Negative correlation.

[0089] In a further embodiment, the maximum flow rate of the coolant in the cooling unit and Positive correlation.

[0090] When the temperature of the battery rises, the coverage area and heat dissipation rate of the coolant usually increase accordingly, causing the coolant temperature to rise. However, if the coolant temperature rises too quickly and the temperature difference is too large, it may cause a large temperature difference between the various parts of the battery, leading to safety risks such as local overheating. In this case, appropriately adjusting the design parameters of the liquid cooling system and controlling factors such as the flow rate and flow rate of the coolant can better balance the relationship between the coolant temperature and the battery temperature, thereby ensuring the safety of the battery while improving the heat dissipation efficiency.

[0091] In some embodiments, the linkage temperature control system of the new energy battery cluster is configured to also include a refrigeration module, the refrigeration module includes N refrigeration units, the refrigeration units correspond to the cooling units one by one, and the refrigeration units are used to reduce the temperature of the coolant in the cooling units.

[0092] Specifically, the refrigeration unit and the cooling unit are connected through a heat exchanger, the refrigeration unit passes refrigerant into the heat exchanger, and the cooling unit passes coolant into the heat exchanger. After the refrigerant and the coolant exchange heat in the heat exchanger, the temperature of the refrigerant increases, and the temperature returns to the cooling unit to be lowered again to facilitate cooling the coolant next time; the temperature of the coolant is lowered, and the temperature of the battery is lowered through the first group of coolant circulation flow paths and / or the second group of coolant circulation flow paths, and then returns to the containing box to facilitate cooling the battery next time.

[0093] In some embodiments, the linkage temperature control system of the new energy battery cluster is configured to further include an alarm module. When the temperature parameter of the i-th battery Greater than the fourth preset value When the alarm module sounds an alarm.

[0094] Specifically, the fourth preset value is the preset temperature, the specific fourth preset value The value can be determined according to the type and specification of the battery, and is not limited here; when the temperature parameter of the i-th battery Greater than the fourth preset value When the fault occurs, the alarm module will sound an alarm to facilitate maintenance and reduce losses.

[0095] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0096] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A linkage temperature control system for a new energy battery cluster, characterized in that: The battery cluster is used to control the temperature of the battery cluster, wherein the battery cluster includes N batteries, each of which is provided with a first flow path and a second flow path for the circulation of coolant; the linkage temperature control system of the new energy battery cluster includes an acquisition module, a cooling module, an execution module and a common branch, wherein the acquisition module is used to acquire the temperature parameters of the N batteries. The cooling module includes N cooling units, each of which corresponds to the battery. The cooling unit is used to pass cooling liquid into the first flow path and / or the second flow path to reduce the temperature of the battery. The common branch is connected to the first flow path and the second flow path respectively. The execution module is used to execute the following steps: Step S100, obtaining the temperature parameter of the i-th battery , i=1, 2 to N; Step S200, determining the temperature parameter of the i-th battery Is it greater than the first preset value? ; The first preset value is the temperature of the battery when it is operating under normal conditions; Step S300: If yes, determine Is the difference greater than the second preset value? ; Step S400: If yes, the cooling unit corresponding to the i-th battery performs a first cooling cycle, wherein the first cooling cycle is that the coolant in the cooling unit corresponding to the i-th battery flows through the first flow path and the second flow path on the i-th battery at the same time; Step S500: If not, determine whether there is more than one battery temperature parameter among the N batteries. Both are greater than the first preset value ; Step S600, if yes, determine whether the i-th battery is a supported battery or a supporting battery; Step S601: All temperature parameters Greater than the first preset value The batteries are sorted in descending order according to the temperature parameters, and the battery with the largest temperature parameter is marked as a reserve battery, and the temperature parameter of the reserve battery is determined. minus Is the difference greater than the third preset value? ; Step S602, if yes, mark the standby battery as a supported battery; Step S603, obtaining all temperature parameters except the standby battery Greater than the first preset value The temperature parameter of the coolant at the first flow path outlet of the battery , M is the temperature parameter of all batteries except the reserve battery Greater than the first preset value The number of batteries and calculate them separately The difference between Step S604, obtaining all temperature parameters except the standby battery Greater than the first preset value The distance between the battery and the supported battery ; Step S605: Calculate the matching score according to the relationship , the relationship is ,in, For all temperature parameters except the reserve battery Greater than the first preset value The temperature parameter of the coolant at the inlet of the first flow path of the battery; E is the total length of N batteries; a and b are weights, and a+b=1; Step S606: Score the matching degree Sort them in descending order and mark the battery with the highest matching score as the supporting battery; Step S610, if the i-th battery is a supported battery, the coolant in the cooling unit corresponding to the i-th battery flows through the first flow path corresponding to the i-th battery, and the second flow path corresponding to the i-th battery receives the coolant from the first flow path on a supporting battery; Step S620, if the i-th battery is a supporting battery, the coolant in the cooling unit corresponding to the i-th battery flows through the first flow path on the i-th battery and then flows into the second flow path on one of the supported batteries; The second preset value a value represented by a maximum cooling efficiency of the coolant in the cooling unit corresponding to the battery flowing through the first flow path and receiving the coolant from the first flow path on a supporting battery through the common branch; The third preset value It is a value represented by the maximum cooling efficiency of the coolant in the cooling unit corresponding to the battery flowing through the first flow path.

2. The linkage temperature control system of the new energy battery cluster according to claim 1, characterized in that: The value of a and The difference is positively correlated.

3. The linkage temperature control system of the new energy battery cluster according to claim 1, characterized in that: After step S606, the method further includes: Step S607: all temperature parameters of the supported battery and the supporting battery and between the supported battery and the supporting battery are matched. Greater than the first preset value After the battery is excluded, steps S601 to S606 are repeatedly executed until no corresponding supported battery and supporting battery are selected.

4. The linkage temperature control system of the new energy battery cluster according to claim 3, characterized in that: The common branch includes multiple pipelines. When a pipeline has no corresponding supported battery and supporting battery to be selected, the matched supported battery and supporting battery are excluded, and steps S601 to S607 are repeated on the next pipeline until no corresponding supported battery and supporting battery are selected.

5. The linkage temperature control system of the new energy battery cluster according to claim 1, characterized in that: The maximum local temperature difference that the battery can tolerate is , the temperature of the coolant in the cooling unit and Negative correlation.

6. The linkage temperature control system of the new energy battery cluster according to claim 5, characterized in that: The maximum flow rate of the coolant in the cooling unit and Positive correlation.

7. The linkage temperature control system of the new energy battery cluster according to claim 1, characterized in that: The linkage temperature control system of the new energy battery cluster also includes an alarm module, when the temperature parameter of the i-th battery Greater than the fourth preset value When the alarm module sounds an alarm.

8. The linkage temperature control system of the new energy battery cluster according to claim 1, characterized in that: The linkage temperature control system of the new energy battery cluster further includes a refrigeration module, which includes N refrigeration units, which correspond one to one with the cooling units, and which are used to reduce the temperature of the coolant in the cooling units.

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