CN219576664U - Integrated charge-discharge equipment - Google Patents
Integrated charge-discharge equipment Download PDFInfo
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- CN219576664U CN219576664U CN202320068707.0U CN202320068707U CN219576664U CN 219576664 U CN219576664 U CN 219576664U CN 202320068707 U CN202320068707 U CN 202320068707U CN 219576664 U CN219576664 U CN 219576664U
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Abstract
The utility model discloses an integrated charge and discharge device, which comprises a device body and a water cooling system; the equipment body comprises a mechanism frame, a movement mechanism and a power supply part; the water cooling system comprises a heat exchanger and a water cooling mechanism, the heat exchanger is arranged in the heat exchange cavity, and the heat exchanger is provided with a cold water inlet and a hot water outlet; the water cooling mechanism is arranged outside the mechanism frame, water supply equipment and a controller are arranged in the water cooling mechanism, a water supply port of the water supply equipment is communicated with a cold water inlet of the heat exchanger through a first water supply pipe and a second water supply pipe, and the first water supply pipe and the second water supply pipe are connected through an electric control proportional valve; the water return port of the water supply device is communicated with the hot water outlet of the heat exchanger through a water return pipe; the electric control proportional valve and the water supply equipment are electrically or signally connected with the controller. The beneficial effects of the utility model are as follows: the sectional control logic is adopted to realize accurate temperature control, so that the electric control proportional valve is prevented from being in a certain state for a long time, and the service life of the electric control proportional valve is prolonged.
Description
Technical Field
The utility model belongs to the technical field of lithium battery multichannel chemical composition equipment, and relates to integrated charging and discharging equipment.
Background
The integrated charging and discharging equipment, namely the mechanism part of the charging and discharging equipment and the power supply part are integrated together, and meanwhile, temperature control treatment is carried out. In order to meet the temperature control accuracy of the battery of the charging and discharging equipment in the industry, the integrated charging and discharging equipment is introduced into a water cooling system to perform efficient and accurate heat exchange temperature control. Because the battery can perform complex physical and chemical reactions in different stages of charge and discharge (constant-current charge stage CC, constant-voltage charge stage CV, constant-current discharge stage DC, constant-voltage discharge stage DV), the power supply part of the corresponding charge and discharge stage works at different powers and can generate different power consumption, so that the heat generated in the charge and discharge equipment is not constant in one layer but dynamically changed in the whole charge and discharge process. At present, a conventional integrated charge and discharge equipment water cooling system is controlled to be started or stopped only by a switching value electric valve, and the switching proportion or the refrigerating capacity of the water cooling system cannot be accurately adjusted, so that corresponding technical indexes cannot be met. Meanwhile, when the integrated charging and discharging equipment enters a factory line production system, the conventional switching value electric valve can not meet actual production requirements. Because the switching value electric valve is only a normally open electric valve or a normally closed electric valve, if the normally open electric valve is selected, when the internal temperature of the charge-discharge equipment is too low or the equipment does not do charge-discharge flow, the electric valve needs to be closed for a long time, and the fault probability of the electric valve can be increased due to long-time absorption of the normally open electric valve; similarly, if the normally closed electric valve is selected, when the equipment is used for a long time for charging and discharging, the electric valve needs to be opened for a long time, the refrigerating capacity of the water cooling system is increased, and the fault probability of the electric valve is increased.
Disclosure of Invention
In order to solve the problems, the utility model provides an integrated charge-discharge device and a logic control method which are used for classifying battery temperature values, adjusting gear, accurately controlling temperature and reducing failure probability of an electric control valve.
The integrated charging and discharging equipment provided by the utility model is characterized in that: comprises an equipment body and a water cooling system;
the device body comprises a mechanism frame, a movement mechanism and a power supply part, wherein the inner cavity of the mechanism frame is divided into a charge-discharge cavity and a heat exchange cavity by a vertical partition plate, an upper air duct fan is arranged at the upper part of the vertical partition plate, and a lower air duct fan is arranged at the lower part of the vertical partition plate; the motion mechanism is arranged in the charge and discharge cavity and is provided with a lifting table for lifting the tray vertically, a plurality of tray fans are arranged at the bottom of the lifting table, and the lifting table divides the charge and discharge cavity into an upper air channel and a lower air channel which are arranged up and down; the power supply part is arranged at the inner top of the mechanism frame, is provided with a plurality of probes, and is opposite to the lifting table;
the water cooling system comprises a heat exchanger and a water cooling mechanism, the heat exchanger is arranged in the heat exchange cavity, and the heat exchanger is provided with a cold water inlet and a hot water outlet; the water cooling mechanism is arranged outside the mechanism frame, water supply equipment and a controller are arranged in the water cooling mechanism, a water supply port of the water supply equipment is communicated with a cold water inlet of the heat exchanger through a first water supply pipe and a second water supply pipe, and the first water supply pipe and the second water supply pipe are connected through an electric control proportional valve; the water return port of the water supply device is communicated with the hot water outlet of the heat exchanger through a water return pipe; the electric control proportional valve and the water supply equipment are electrically or signally connected with the controller.
Preferably, the end face of the vertical partition plate facing the charge and discharge cavity is a first face, the end face of the vertical partition plate facing the heat exchange cavity is a second face, an upper air duct fan is arranged at the upper part of the first face, a lower air duct fan is arranged at the lower part of the first face, an air inlet of the upper air duct fan is positioned at one side of the charge and discharge cavity, an air outlet of the upper air duct fan is positioned at one side of the heat exchange cavity, and the air inlet of the upper air duct fan is used for conveying hot air in the upper air duct to the upper part of the heat exchange cavity; the air inlet of the lower air duct fan is positioned at one side of the heat exchange cavity, and the air outlet is positioned at one side of the charge-discharge cavity, and is used for conveying cold air at the lower part of the heat exchange cavity into the lower air duct.
When the charging and discharging process is started, the contact part can generate contact resistance heat Q1 due to contact resistance, the battery generates heat Q2 at the corresponding moment, the power supply part generates heat Q3 at the same moment, and the total heat Q in the device is the total heat Q Total (S) ＝Q1+Q2+Q3。
The temperature control principle of the integrated charging and discharging equipment is as follows, when the charging and discharging process is normally performed, the battery and the power supply part of the tray in the moving mechanism are mutually pressed, and Q is generated in the equipment Total (S) The heat forms hot air, the hot air is pumped into a heat exchange cavity on the side surface of the rack through an upper air duct fan, the hot air is changed into cold air after heat exchange with the heat exchanger, the cold air is blown into the movement mechanism through a lower air duct fan, the cold air is sucked by a tray fan after entering the movement mechanism, flows through the surface of a battery and passes through a power supply part to form hot air, and therefore cold and hot air circulation inside the integrated charge and discharge equipment is completed. The cold water inlet and the hot water outlet of the heat exchanger are respectively connected with a second water supply pipe and a water return pipe, and the second water supply pipe is sequentially connected with the electric control proportional valve and the first water supply pipe and then is communicated with an external water cooling mechanism. After the heat exchanger exchanges heat with the air end of the integrated charge and discharge equipment, cooling water in an internal pipeline of the heat exchanger is changed into hot water, the hot water enters an external water cooling mechanism through a water return pipe, the hot water is changed into cold water after heat exchange in the water cooling mechanism, and the cold water sequentially flows into the internal pipeline of the heat exchanger through a first water supply pipe, an electric control proportional valve and a second water supply pipe to be subjected to heat exchange to be changed into hot water, so that cold and hot water circulation outside the integrated charge and discharge equipment is completed.
At present, the battery is charged and discharged in the industry, and the battery is generally divided into four stages, namely: a constant current charging stage (CC stage, which is a stage in which the battery current is constant, a constant voltage charging stage (CV stage, which is a stage in which the battery voltage is constant, and the battery current is decreasing), a constant current discharging stage (DC stage, which is a stage in which the battery current is constant, and the battery voltage is decreasing), and a constant voltage discharging stage (DV stage, which is a stage in which the battery voltage is constant, and the battery current is decreasing).
The integrated charge-discharge device generates heat at different stages (the heat can be simplified to q=i 2 * R) is inconsistent, in the constant current charging stage, the current is constant to a certain set value (i=200A, for example), the impedance R generally changes little in the charging and discharging stage, and the heat quantity Q is generated in the constant current charging stage CC The stability is relatively stable; entering a constant voltage charging stage, and rapidly reducing the current from a set value to generate heat Q in the constant voltage stage CV Will fall rapidly and the whole constant voltage charging stage Q CV Will continue to drop dynamically while Q CV ＜Q CC The method comprises the steps of carrying out a first treatment on the surface of the Entering into constant current discharge stage, and instantly returning to the set value (i=200a) and keeping unchanged, at this time, generating heat quantity Q DC Is relatively stable, and Q CV ＜Q CC ＝Q DC The method comprises the steps of carrying out a first treatment on the surface of the Entering into constant voltage discharge stage, and rapidly decreasing current from the set value again to generate heat Q in constant voltage stage DV Will drop rapidly and Q DV Will continue to drop dynamically while Q DV ＜Q CC ＝Q DC 。
Aiming at the characteristic that the internal heat generation amount of the integrated charge-discharge equipment is dynamically changed along with the charge-discharge flow, the refrigeration capacity of the water cooling system needs to be correspondingly and dynamically adjusted. And an electric control proportional valve is adopted to control the opening and closing proportion of the water cooling system and further control the refrigerating capacity of the water cooling system. And because the constant-current charge and discharge stage (CC stage and DC stage) and the constant-voltage charge and discharge stage (CV stage and DV stage) have larger heat generation difference, the corresponding stages are controlled by adopting independent logic.
The logic control method is applied to integrated charge and discharge equipment, and comprises the following steps:
step 1, in the range of 0 to (t) 1 +t EOT1 ) In the time, A1 control logic is adopted to control the opening and closing of the electric control proportional valve, t 1 For constant current charging phase duration, t EOT1 Control logic delay time for A1:
s11 when the average temperature value T of all the batteries in the tray AVG When the temperature is less than T-1 ℃, the output opening and closing proportion of the electric control proportional valve is 0%, namely the proportional valve is at the momentIn a fully closed state; t is a target temperature value;
s12 when the average temperature value T of all the batteries in the tray AVG When the temperature is more than T+1deg.C, the output opening and closing ratio of the electric control proportional valve is 100%, namely the proportional valve is in a full-open state at the moment; t is a target temperature value;
s13 when the average temperature value T of all the batteries in the tray AVG When the valve is at (T-1 ℃, T+1 ℃), the output opening and closing ratio of the electric control proportional valve is S1 (if the valve is opened by 70%, the value of S1 is related to specific equipment and environment), namely the proportional valve is in a partial opening state at the moment;
step 2, at (t 1 +t EOT1 )～(t 2 +t EOT2 ) In the time, A2 control logic is adopted to control the opening and closing of the electric control proportional valve, t 2 For constant voltage charging phase duration, t EOT2 Control logic delay time for A2:
s21 when the average temperature value T of all the batteries in the tray AVG When the temperature is less than T-1 ℃, the output opening and closing proportion of the electric control proportional valve is 0%, namely the proportional valve is in a full-closed state at the moment; t is a target temperature value;
s22 when the average temperature value T of all the batteries in the tray AVG When the temperature is more than T+1deg.C, the output opening and closing ratio of the electric control proportional valve is 100%, namely the proportional valve is in a full-open state at the moment; t is a target temperature value;
s23 when the average temperature value T of all the batteries in the tray AVG When the temperature is (T-1 ℃, T+1 ℃) the output opening and closing ratio of the electric control proportional valve is S2, wherein S2 is less than S1 (for example, the valve is opened by 20 percent because of Q) CV Far less than Q CC The opening proportion of the electric control proportional valve is smaller, namely the proportional valve is in a partial opening state at the moment; t is a target temperature value;
step 3, at (t 2 +t EOT2 )～(t 3 +t EOT3 ) In the time, A3 control logic is adopted to control the opening and closing of the electric control proportional valve, t 3 For constant current discharge phase duration, t EOT3 Control logic delay time for A3:
s31 when the average temperature value T of all the batteries in the tray AVG When the temperature is less than T-1 ℃, the output opening and closing proportion of the electric control proportional valve is 0 percent, namely the proportional valve is at full closing at the momentA closed state; t is a target temperature value;
s32 when the average temperature value T of all the batteries in the tray AVG When the temperature is more than T+1deg.C, the output opening and closing ratio of the electric control proportional valve is 100%, namely the proportional valve is in a full-open state at the moment; t is a target temperature value;
s33 when the average temperature value T of all the batteries in the tray AVG When the temperature is (T-1 ℃ and T+1 ℃), the output opening and closing proportion of the electric control proportional valve is S3, the S3 is close to S1 (if 60% is opened, the heat generated in the constant current discharging stage of part of the battery is slightly lower than that in the constant current charging stage mainly depending on the battery characteristics), namely the proportional valve is in a partial opening state at the moment; t is a target temperature value;
step 4, at (t 3 +t EOT3 )～t 4 In the time, A4 control logic is adopted to control the opening and closing of the electric control proportional valve, t 4 For constant current discharge phase duration:
s41 when the average temperature value T of all the batteries in the tray AVG When the temperature is less than T-1 ℃, the output opening and closing proportion of the electric control proportional valve is 0%, namely the proportional valve is in a full-closed state at the moment; t is a target temperature value;
s42 when the average temperature value T of all the batteries in the tray AVG When the temperature is more than T+1deg.C, the output opening and closing ratio of the electric control proportional valve is 100%, namely the proportional valve is in a full-open state at the moment; t is a target temperature value;
s43 when the average temperature value T of all the batteries in the tray AVG When the temperature is (T-1 ℃ and T+1 ℃), the output opening and closing proportion of the electric control proportional valve is S4, and the S4 is close to S2, namely the proportional valve is in a partial opening state at the moment; t is the target temperature value.
In step 1, the integrated charge-discharge device is in a constant current charge stage (CC stage), and the electrically controlled proportional valve acts between 0%, S1 and 100%, but because the CC stage generates more heat and is also more stable, the electrically controlled proportional valve is basically in S1 after the heat generated in the stage is stable.
At (t) 1 ～t 2 ) In the time period, the charge-discharge flow is changed from the CC stage to the CV stage, and the current starts to drop rapidly after entering the CV stage, but the heat generated in the CC stage cannot be instantaneously consumed. At the same time S2 < S1, if directly enterAnd when the control logic A2 is input, the refrigerating capacity of the water cooling system is obviously smaller than the heat in the integrated charge and discharge equipment, so that the temperature is increased in a runaway way. Thus, there is a need to delay the A1 control logic by t EOT1 I.e. at (t 1 +t EOT1 ) In the time, adopting A1 control logic; when at (t) 1 +t EOT1 )～t 2 And when the time period is shortened, the A2 control logic is adopted.
At (t) 2 ～t 3 ) In the time, the charging and discharging process is changed from the CV stage to the DC stage, and the current instantaneously returns to the set current value when entering the DC stage, but a period of time is required for heat accumulation in the charging and discharging equipment. Meanwhile, if S3 is more than S2, if the control logic directly enters the A3 control logic, the refrigerating capacity of the water cooling system at the beginning of the DC stage is obviously larger than the heat in the integrated charge and discharge equipment, so that the temperature is reduced in a runaway way. Thus, there is a need to delay the A2 control logic by t EOT2 I.e. at (t 2 +t EOT2 ) In the time, adopting A2 control logic; when at (t) 2 +t EOT2 )～t 2 Only during the time period, the A3 control logic is truly adopted.
At (t) 3 ～t 4 ) In the time, the charging and discharging flow is changed from the DC stage to the DV stage, and the current starts to drop rapidly when entering the DV stage, but the heat generated by the DC stage cannot be instantaneously consumed. Meanwhile, S4 is less than S3, if the control logic is directly accessed to the A4 control logic, the refrigerating capacity of the water cooling system is obviously smaller than the heat in the integrated charge and discharge equipment, and the temperature is increased in a runaway way. Thus, there is a need to delay the A3 control logic by t EOT3 I.e. at (t 3 +t EOT3 ) In the time, adopting A3 control logic; when at (t) 3 +t EOT3 )～t 3 Only during the time period, the A4 control logic is truly adopted.
The beneficial effects of the utility model are as follows:
1. the charging and discharging equipment has different working characteristics in each charging and discharging stage, and the characteristics can enable the internal heat of the charging and discharging equipment to keep dynamic change, and finally, the battery temperature fluctuation is large, and the temperature rise is uncontrollable. Aiming at different charge and discharge stages, the utility model adopts a sectional control logic idea, and adjusts the refrigerating capacity of a water cooling system in each charge and discharge stage by finely controlling the opening and closing proportion of an electric control proportional valve, thereby accurately controlling the temperature rise of the battery and controlling the temperature fluctuation of the battery within the technical index range;
2. the patent introduces a control logic delay concept uniquely, and aims at the situation that the heat in the charge and discharge equipment cannot be consumed instantaneously when each charge and discharge phase is switched instantaneously (from CC phase to CV phase, from CV phase to DC phase to DV phase), and the influence of heat inertia in the charge and discharge equipment is reduced by adding the control logic delay and utilizing the front control logic, so that the smooth transition of a battery temperature control curve is ensured;
3. the electric control proportional valve is used, so that the water cooling system can be in a certain refrigerating state for a long time, the defect that the switching value electric valve cannot be in a certain state for a long time is avoided, and the fault probability of the electric control valve is reduced;
4. this patent has classified battery temperature value, and the gear is adjusted (for example CC stage, divide into 0%,70% and 100% three and keep off control, and other stages are also the same reason and adopt three to keep off control) control logic, under the circumstances that guarantee battery temperature fluctuation accords with the requirement, the automatically controlled proportional valve of adjustment as few as possible has indirectly promoted the life of automatically controlled proportional valve, guarantees the stability of integral type charge-discharge equipment.
Drawings
Fig. 1 is a structural diagram of the present utility model.
Fig. 2a is a flow chart of a control method of the present utility model.
FIG. 2b is a flow chart of the A1 control logic of the present utility model.
Fig. 2c is a flow chart of the A2 control logic of the present utility model.
Fig. 2d is a flow chart of the A3 control logic of the present utility model.
Fig. 2e is a flow chart of the A4 control logic of the present utility model.
Fig. 3 is a schematic diagram of the control logic of the present utility model.
Detailed Description
The following describes the detailed implementation of the embodiments of the present utility model with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the utility model, are not intended to limit the utility model.
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
The utility model will be described in detail below with reference to the drawings in connection with exemplary embodiments.
The integrated charge and discharge equipment comprises an equipment body 1 and a water cooling system 2;
the equipment body 1 comprises a mechanism frame 11, a movement mechanism 12 and a power supply part 13, wherein the inner cavity of the mechanism frame 11 is divided into a charge-discharge cavity and a heat exchange cavity by a vertical partition plate 14, an upper air duct fan 141 is arranged at the upper part of the vertical partition plate 14, and a lower air duct fan 142 is arranged at the lower part of the vertical partition plate; the motion mechanism 12 is arranged in the charge and discharge cavity, the motion mechanism 12 is provided with a lifting table 121 for lifting the tray 3 vertically, a plurality of tray fans 122 are arranged at the bottom of the lifting table 121, and the lifting table 121 divides the charge and discharge cavity into an upper air channel and a lower air channel which are arranged up and down; the power supply part 13 is arranged at the inner top part of the mechanism frame, the power supply part 13 is provided with a plurality of probes 131, and the probes 131 are opposite to the lifting table 121;
the water cooling system 2 comprises a heat exchanger 21 and a water cooling mechanism 22, wherein the heat exchanger 21 is arranged in the heat exchange cavity, and the heat exchanger 21 is provided with a cold water inlet 211 and a hot water outlet 212; the water cooling mechanism 22 is arranged outside the mechanism frame 11, a water supply device and a controller are arranged in the water cooling mechanism 22, a water supply port of the water supply device is communicated with a cold water inlet 211 of the heat exchanger 21 through a first water supply pipe 221 and a second water supply pipe 222, and the first water supply pipe 221 and the second water supply pipe 222 are connected through an electric control proportional valve 223; the water return port of the water supply device is communicated with the hot water outlet 212 of the heat exchanger 21 through a water return pipe 224; the electric control proportional valve 223 and the water supply equipment are electrically or signally connected with the controller.
In some embodiments of the present utility model, the mechanism frame 11 includes an upper support plate 111 and a lower support plate 112 that are disposed at an upper-lower interval, the upper support plate 111 and the lower support plate 112 are fixed by a vertically disposed guide rod 113, a bottom plate 114 is mounted on an inner bottom surface of the lower support plate 112, the guide rod 113 and the bottom plate 114 are located in the charging and discharging cavity, and a tray limiting member 115 is disposed on the bottom plate 114 and used for limiting a vertically lowest position of the tray 3.
In some embodiments of the present utility model, the end surface of the vertical partition 14 facing the charging and discharging chamber is a first surface, the end surface facing the heat exchange chamber is a second surface, an upper air duct fan 141 is disposed at the upper part of the first surface, a lower air duct fan 142 is disposed at the lower part of the first surface, an air inlet of the upper air duct fan 141 is disposed at one side of the charging and discharging chamber, and an air outlet is disposed at one side of the heat exchange chamber, for conveying the hot air in the upper air duct to the upper part of the heat exchange chamber; the air inlet of the lower air duct fan 142 is positioned at one side of the heat exchange cavity, and the air outlet is positioned at one side of the charge-discharge cavity, and is used for conveying cold air at the lower part of the heat exchange cavity into the lower air duct.
In some embodiments of the present utility model, the moving mechanism 12 includes a lifting platform 121 and a lifting cylinder 123, the lifting platform 121 is a rectangular plate, and a linear bearing 124 is fixedly arranged at each of four corners of the lifting platform for the corresponding guide rod 113 to penetrate therethrough, so as to realize sliding fit between the lifting platform 121 and the guide rod 113; the bottom of the lifting table 121 is provided with a plurality of tray fans 122, the lifting table 121 divides the charge and discharge cavity into an upper air channel and a lower air channel which are arranged up and down, hot air generated by charge and discharge is arranged in the upper air channel, and cooled cold air is arranged in the lower air channel; the lifting cylinder 122 is vertically arranged in the charge and discharge cavity of the mechanism frame 11, and the telescopic end of the lifting cylinder 122 is connected with the lifting table 121 for driving the lifting table 121 to lift.
The heat exchanger 22 may be a fin type heat exchanger, and hot air sent to the upper air channel blower 141 from the upper air channel is subjected to energy exchange in the fin gaps of the heat exchanger to become cold air, the cold air flows downwards, and is sent to the lower air channel via the lower air channel blower, and then is sucked via the tray blower 122 and blown to the surface of the battery 4 in the tray 3, so that heat on the surface of the battery 4 is taken away, and the charge and discharge cavity of the mechanism frame and the internal circulation of cold and hot air in the heat exchange cavity are formed.
As shown in fig. 1, the arrow represents an air circulation path in the mechanism frame, wherein the position a is hot air in the upper air duct, and the position B is hot air sent to the upper part of the heat exchanger through the upper air duct fan; the part C is cold air subjected to heat exchange by a heat exchanger; the part D is cold air fed into the lower air duct through the lower air duct fan; e is cold air sent to the surface of the battery through a tray fan; the arrow at F represents the flow direction of the hot water generated by heat exchange through the heat exchanger; the arrow at G represents the direction of flow of cold water from the water cooling plant.
The temperature control principle of the integrated charging and discharging equipment is as follows, when the charging and discharging process is normally performed, the battery 4 of the tray 3 in the moving mechanism 12 and the power supply part 13 are mutually pressed, and Q is generated in the equipment Total (S) The heat forms hot air, which is pumped into the heat exchange cavity on the side of the rack through the upper air duct fan 141, is changed into cold air after heat exchange with the heat exchanger 22, is blown into the movement mechanism 12 through the lower air duct fan 142, is sucked by the tray fan 122 after entering the movement mechanism 12, flows through the surface of the battery 4 and passes through the power supply part 13 to form hot air, and thus, the cold and hot air circulation inside the integrated charge and discharge equipment is completed. The cold water inlet 211 and the hot water outlet 212 of the heat exchanger 22 respectivelyThe second water supply pipe 222 and the water return pipe 224 are connected, and the second water supply pipe 222 is communicated with the external water cooling mechanism 22 after being sequentially connected with the electric control proportional valve 223 and the first water supply pipe 221. After the heat exchange of the air end of the heat exchanger 22 and the integrated charge and discharge equipment is carried out, cooling water in the internal pipeline of the heat exchanger is changed into hot water, the hot water enters the external water cooling mechanism 22 through the water return pipe 224, the hot water is changed into cold water after the heat exchange in the water cooling mechanism 22, and the cold water sequentially flows into the internal pipeline of the heat exchanger 22 through the first water supply pipe 221, the electric control proportional valve 223 and the second water supply pipe 222 to be subjected to heat exchange to be changed into hot water, so that the cold and hot water circulation outside the integrated charge and discharge equipment is completed.
At present, the battery is charged and discharged in the industry, and the battery is generally divided into four stages, namely: a constant current charging stage CC (the stage of battery current is unchanged, the battery voltage is increased), a constant voltage charging stage CV (the stage of battery voltage is unchanged, the battery current is decreased), a constant current discharging stage DC (the stage of battery current is unchanged, the battery voltage is decreased), and a constant voltage discharging stage DV (the stage of battery voltage is unchanged, the battery current is decreased).
As shown in FIG. 3, 0 to t 1 The time is constant current charging stage, namely CC stage, t 1 ～t 2 The constant voltage charging stage, namely the CV stage, is adopted in the time; t is t 2 ～t 3 The time is a constant current discharge stage, namely a DC stage; t is t 3 ～t 4 The constant voltage discharge stage, namely the DV stage, is adopted in the time.
The integrated charge-discharge device generates heat at different stages (the heat can be simplified to q=i 2 * R) is inconsistent, in the constant current charging CC stage, the current is constant to a certain set value (i=200A, for example), the impedance R generally changes little in the charging and discharging stage, and the heat quantity Q is generated in the constant current charging stage CC The stability is relatively stable; entering a constant voltage charging CV stage, and rapidly reducing the current from a set value to generate heat Q in the constant voltage stage CV Will fall rapidly and the whole constant voltage charging stage Q CV Will continue to drop dynamically while Q CV ＜Q CC The method comprises the steps of carrying out a first treatment on the surface of the Entering into constant current discharge DC stage, and instantly returning to the set value (i=200A) and keeping unchanged, at this time, generating heat Q DC Is relatively stable, and Q CV ＜Q CC ＝Q DC The method comprises the steps of carrying out a first treatment on the surface of the Entering into constant voltage discharge DV stage, and rapidly decreasing current again from set value to generate heat quantity Q in constant voltage stage DV Will drop rapidly and Q DV Will continue to drop dynamically while Q DV ＜Q CC ＝Q DC 。
Aiming at the characteristic that the internal heat generation amount of the integrated charge-discharge equipment is dynamically changed along with the charge-discharge flow, the refrigeration capacity of the water cooling system needs to be correspondingly and dynamically adjusted. And an electric control proportional valve is adopted to control the opening and closing proportion of the water cooling system and further control the refrigerating capacity of the water cooling system. And because the constant-current charge and discharge stage (CC stage and DC stage) and the constant-voltage charge and discharge stage (CV stage and DV stage) have larger heat generation difference, the corresponding stages are controlled by adopting independent logic.
The logic control method is applied to integrated charge and discharge equipment, and comprises the following steps:
step 1, in the range of 0 to (t) 1 +t EOT1 ) In the time, A1 control logic is adopted to control the opening and closing of the electric control proportional valve, t 1 For constant current charging phase duration, t EOT1 Control logic delay time for A1:
s11 when the average temperature value T of all the batteries in the tray AVG When the temperature is less than T-1 ℃, the output opening and closing proportion of the electric control proportional valve is 0%, namely the proportional valve is in a full-closed state at the moment; t is a target temperature value;
s12 when the average temperature value T of all the batteries in the tray AVG When the temperature is more than T+1deg.C, the output opening and closing ratio of the electric control proportional valve is 100%, namely the proportional valve is in a full-open state at the moment; t is a target temperature value;
s13 when the average temperature value T of all the batteries in the tray AVG When the temperature is (T-1 ℃ and T+1 ℃), the output opening and closing proportion of the electric control proportional valve is S1, namely the proportional valve is in a partial opening state at the moment;
step 2, at (t 1 +t EOT1 )～(t 2 +t EOT2 ) In the time, A2 control logic is adopted to control the opening and closing of the electric control proportional valve, t 2 For constant voltage charging phase duration, t EOT2 Control logic delay time for A2:
s21 when the average temperature value T of all the batteries in the tray AVG When the temperature is less than T-1 ℃, the output opening and closing proportion of the electric control proportional valve is 0%, namely the proportional valve is in a full-closed state at the moment; t is a target temperature value;
s22 when the average temperature value T of all the batteries in the tray AVG When the temperature is more than T+1deg.C, the output opening and closing ratio of the electric control proportional valve is 100%, namely the proportional valve is in a full-open state at the moment; t is a target temperature value;
s23 when the average temperature value T of all the batteries in the tray AVG When the temperature is (T-1 ℃ and T+1 ℃), the output opening and closing proportion of the electric control proportional valve is S2, wherein S2 is less than S1, namely the proportional valve is in a partial opening state at the moment; t is a target temperature value;
step 3, at (t 2 +t EOT2 )～(t 3 +t EOT3 ) In the time, A3 control logic is adopted to control the opening and closing of the electric control proportional valve, t 3 For constant current discharge phase duration, t EOT3 Control logic delay time for A3:
s31 when the average temperature value T of all the batteries in the tray AVG When the temperature is less than T-1 ℃, the output opening and closing proportion of the electric control proportional valve is 0%, namely the proportional valve is in a full-closed state at the moment; t is a target temperature value;
s32 when the average temperature value T of all the batteries in the tray AVG When the temperature is more than T+1deg.C, the output opening and closing ratio of the electric control proportional valve is 100%, namely the proportional valve is in a full-open state at the moment; t is a target temperature value;
s33 when the average temperature value T of all the batteries in the tray AVG When the temperature is (T-1 ℃ and T+1 ℃), the output opening and closing proportion of the electric control proportional valve is S3, and the S3 is close to the S1, namely the proportional valve is in a partial opening state at the moment; t is a target temperature value;
step 4, at (t 3 +t EOT3 )～t 4 In the time, A4 control logic is adopted to control the opening and closing of the electric control proportional valve, t 4 For constant current discharge phase duration:
s41 when the average temperature value T of all the batteries in the tray AVG When the temperature is less than T-1 ℃, the output opening and closing proportion of the electric control proportional valve is 0%, namely the proportional valve is in a full-closed state at the moment; t is the target temperature value；
S42 when the average temperature value T of all the batteries in the tray AVG When the temperature is more than T+1deg.C, the output opening and closing ratio of the electric control proportional valve is 100%, namely the proportional valve is in a full-open state at the moment; t is a target temperature value;
s43 when the average temperature value T of all the batteries in the tray AVG When the temperature is (T-1 ℃ and T+1 ℃), the output opening and closing proportion of the electric control proportional valve is S4, and the S4 is close to S2, namely the proportional valve is in a partial opening state at the moment; t is the target temperature value.
In step 1 of the present utility model, t EOT1 The delay time is in a specific integrated charge-discharge device, and a stable value can be obtained by a device debugging method, and a prototype used for test in the embodiment, teot1=2 min. But this value cannot replace all the integrated charge-discharge devices using the method. There should be a specific tEOT1 delay time for a particular integrated charge-discharge device. Because of the specific integrated charge and discharge equipment, the used battery model and charge and discharge power are inconsistent, so that the generated heat is not identical, and the time delay time of the tEOT1 is also inconsistent. t is t EOT2 、t EOT3 Principle and t EOT1 As such, in this prototype test, t EOT2 、t EOT3 All are about 2 minutes.
In the step 1 of the utility model, the opening and closing proportion S1 is related to specific integrated charge and discharge equipment and the environment, and a specific numerical value can be adjusted according to the specific environment to obtain a stable value. For example, when the integrated charge and discharge equipment adopts 40A current for charge and discharge, the heat in the equipment is rapidly generated at the moment, and rapid refrigeration is needed, the S1 switching proportion is 60% -70%; if the integrated charge and discharge equipment adopts 30A current to charge and discharge, the heat in the equipment is relatively small and slow at the moment, and the S1 switching proportion is 40% -50%; for example, when the environmental temperature of the equipment exceeds 35 ℃, the equipment exchanges heat with the outside frequently to consume energy, and the S1 opening and closing proportion is 60% -70%; when the temperature of the environment where the equipment is positioned is lower than 20 ℃, the equipment exchanges heat with the outside relatively less, and the opening and closing proportion is 30% -40%. Therefore, the range of the S1 cannot be generally confirmed, and the specific debugging device needs to be confirmed according to the current working condition and environment. The specific S1 parameters cannot be generally described, and need to be specifically discussed according to the integrated charge and discharge and the environment. After the specific integrated charge and discharge and the environment are confirmed, the stable S1 parameter can be confirmed by means of device debugging. In addition, the integral charge-discharge device is generally at a relatively stable value for a long time, for example, when the charge-discharge current is confirmed to be 40A, the current is generally not arbitrarily changed to 30A or other values, and then S1 is also a relatively stable value. The values of the opening and closing ratios S2 and S3 are the same as those of S1, and depend on specific equipment and environment.
While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.
Claims (2)
1. Integral type charge-discharge equipment, its characterized in that: comprises an equipment body (1) and a water cooling system (2);
the equipment body (1) comprises a mechanism frame (11), a movement mechanism (12) and a power supply part (13), wherein the inner cavity of the mechanism frame (11) is divided into a charge-discharge cavity and a heat exchange cavity by a vertical partition plate (14), an upper air duct fan (141) is arranged at the upper part of the vertical partition plate (14), and a lower air duct fan (142) is arranged at the lower part of the vertical partition plate; the motion mechanism (12) is arranged in the charge and discharge cavity, the motion mechanism (12) is provided with a lifting table (121) for lifting the tray (3) vertically, a plurality of tray fans (122) are arranged at the bottom of the lifting table (121), and the lifting table (121) divides the charge and discharge cavity into an upper air channel and a lower air channel which are arranged up and down; the power supply part (13) is arranged at the inner top part of the mechanism frame, the power supply part (13) is provided with a plurality of probes (131), and the probes (131) are opposite to the lifting table (121);
the water cooling system (2) comprises a heat exchanger (21) and a water cooling mechanism (22), the heat exchanger (21) is arranged in the heat exchange cavity, and the heat exchanger (21) is provided with a cold water inlet (211) and a hot water outlet (212); the water cooling mechanism (22) is arranged outside the mechanism frame (11), water supply equipment and a controller are arranged in the water cooling mechanism (22), a water supply port of the water supply equipment is communicated with a cold water inlet (211) of the heat exchanger (21) through a first water supply pipe (221) and a second water supply pipe (222), and the first water supply pipe (221) and the second water supply pipe (222) are connected through an electric control proportional valve (223); the water return port of the water supply device is communicated with the hot water outlet (212) of the heat exchanger (21) through a water return pipe (224); the electric control proportional valve (223) and the water supply equipment are electrically or signally connected with the controller.
2. The integrated charge and discharge apparatus as set forth in claim 1, wherein: the end face of the vertical partition plate facing the charge and discharge cavity is a first face, the end face of the vertical partition plate facing the heat exchange cavity is a second face, an upper air duct fan is arranged at the upper part of the first face, a lower air duct fan is arranged at the lower part of the first face, an air inlet of the upper air duct fan is positioned at one side of the charge and discharge cavity, an air outlet of the upper air duct fan is positioned at one side of the heat exchange cavity, and the air outlet of the upper air duct fan is used for conveying hot air in the upper air duct to the upper part of the heat exchange cavity; the air inlet of the lower air duct fan is positioned at one side of the heat exchange cavity, and the air outlet is positioned at one side of the charge-discharge cavity, and is used for conveying cold air at the lower part of the heat exchange cavity into the lower air duct.
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| CN202320068707.0U CN219576664U (en) | 2023-01-10 | 2023-01-10 | Integrated charge-discharge equipment |
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| CN202320068707.0U CN219576664U (en) | 2023-01-10 | 2023-01-10 | Integrated charge-discharge equipment |
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