CN-121983707-A - Power battery module for new energy electric automobile and cooling control method of power battery module

Abstract

The invention discloses a power battery module for a new energy electric automobile and a cooling control method thereof, comprising a battery core lower pressing plate, a plurality of battery core fixing positions which are respectively arranged on the battery core lower pressing plate at equal intervals in an array mode along the transverse direction and the longitudinal direction, a plurality of battery cores which are respectively arranged on the battery core fixing positions in a matching mode, a water channel mechanism which is arranged in a pore between two adjacent rows of battery cores and is in close contact with the battery cores, two connecting ports which are respectively communicated with two ends of the water channel, and a battery core upper pressing plate which is arranged at the top of the battery cores in a matching mode. The multiple electric cores are integrated together and are subjected to temperature regulation through the water channel mechanism, so that the problem of uneven local heat dissipation of the battery module is solved. The invention also discloses a cooling control method of the power battery module for the new energy electric automobile.

Inventors

• LI MINGJIE

Assignees

• 辽宁机电职业技术学院

Dates

Publication Date

20260505

Application Date

20260209

Claims (8)

1. 1. A power battery module for new forms of energy electric automobile, characterized in that includes: A lower pressing plate of the battery cell; The battery cell fixing positions are respectively arranged on the battery cell lower pressing plate at equal intervals in an array mode along the transverse direction and the longitudinal direction; One end of each of the plurality of electric cores is arranged on the electric core fixing position in a matching way; the water channel mechanism is arranged in a pore between two adjacent rows of electric cores and is in close contact with the electric cores, and the water channels are distributed in an S shape among the electric cores; the two connecting ports are respectively communicated with two ends of the water channel; and the battery cell upper pressing plate is arranged at the top of the plurality of battery cells in a matching way.
2. 2. The power battery module for a new energy electric vehicle of claim 1, further comprising: the copper bar lower pressing plate is arranged on the electric core upper pressing plate; The copper bar is arranged on the copper bar lower pressing plate; And the copper bar upper pressing plate is arranged on the copper bar.
3. 3. The power battery module for a new energy electric vehicle according to claim 2, further comprising: The upper cover plate is arranged on the copper bar upper pressing plate; The lower tray is arranged at the bottom of the battery cell lower pressing plate; the outer frame is of a cuboid structure and comprises four side faces which are sequentially connected, and is arranged outside the plurality of battery cells and matched with the upper cover plate and the lower tray to form an outer shell of the cuboid structure.
4. 4. The power battery module for a new energy electric vehicle of claim 3, wherein the water course mechanism comprises: A water channel; the water channel rubber is arranged outside the water channel, is of a continuous S-shaped structure and is matched with the plurality of electric cores; two water channel pipe heads are respectively arranged at two ends of the water channel in a matching way.
5. 5. A cooling control method of a power battery module for a new energy electric vehicle, characterized by using the power battery module for a new energy electric vehicle according to any one of claims 1 to 4, comprising: Step one, establishing a graph model of a battery module, wherein each cell is used as a graph node, and the heat conduction and water channel coupling relationship among the cells is used as a graph edge; Acquiring the temperature of each cell according to a sampling period, extracting the time characteristic of each cell based on a time sequence convolution network, and aggregating the spatial heat correlation characteristics among the cells by using a graph annotation force network; thirdly, constructing a cooling control optimization model based on the predicted battery cell temperature change; ; In the formula, Is the first The average temperature of the step prediction is calculated, For the target temperature, set to 25C, Is the first The maximum temperature difference predicted by the step is calculated, For the flow control amount of the coolant, 、 、 Is a weight coefficient; Step four, obtaining an optimal cooling liquid flow sequence based on a cooling control optimization model; executing a first control quantity in the optimal cooling flow sequence, and performing rolling optimization control; And fifthly, adopting maximum cooling flow when detecting that the temperature of any battery cell is greater than the set safe temperature.
6. 6. The cooling control method for the power battery module of the new energy electric vehicle according to claim 5, wherein the sequential convolution network in the second step adopts multi-scale hole causal convolution, and the first step is that Layer output characteristics The calculation formula is as follows: ; In the formula, For a linear rectification activation function, For the weight index to be used, Is the first The size of the layer convolution kernel, Is the first Layer convolution kernel The weight, which is convolution operation, Is that Layer network in The output characteristics calculated at the moment in time, Is the first The expansion factor of the layer(s), Is the first The layer bias term is the current time index.
7. 7. The cooling control method for the power battery module of the new energy electric vehicle according to claim 6, wherein in the second step, the calculation formula of the attention coefficient of the attention network is: ; In the formula, Is a linear rectifying unit with leakage, In order to pay attention to the weight vector, For the purpose of the transposition, For the feature transformation weight matrix, 、 、 As the feature vector of the node, For the structure a priori the fusion coefficients, For the a priori weights of the structure, Is a node Is a neighbor set of the neighbor set.
8. 8. The cooling control method for the power battery module of the new energy electric vehicle according to claim 5, wherein the constraint condition in the third step is: ; ; ; In the formula, To be in a time step For the first The temperature predicted value of each cell, For the current moment of time, In order to predict the number of steps, , The number of the electric core is given to the electric core, , The maximum safe temperature is 50 ℃, The maximum allowable temperature difference is 10 ℃, In order to be a minimum allowable amount of the material, Is the maximum allowable amount.

Description

Power battery module for new energy electric automobile and cooling control method of power battery module Technical Field The invention relates to a power battery module for a new energy electric automobile and a cooling control method thereof, and belongs to the technical field of new energy electric automobiles. Background The power battery used on the electric automobile is a battery pack formed by a plurality of battery units in a serial-parallel connection mode, and the battery units are tightly arranged together. When the battery pack is charged and discharged, heat generated by single batteries of the batteries is mutually influenced, if heat dissipation is uneven, local temperature of the battery pack can be quickly increased, so that consistency of the batteries is greatly influenced, and serious accidents are caused by thermal runaway of certain single batteries. In the conventional power battery cooling control method, the regulation is generally started after the temperature reaches or exceeds a set threshold based on a limited number of temperature sensors, and when the local temperature suddenly and abnormally rises, the control cannot be immediately performed. Disclosure of Invention The invention designs and develops a power battery module for a new energy electric automobile, integrates a plurality of electric cores, adjusts the temperature of the electric cores through a water channel mechanism, and solves the problem of uneven local heat dissipation of the battery module. The invention also designs and develops a cooling control method for the power battery module of the new energy electric vehicle, which establishes a coupling relation between the electric cores and the water channel based on the graph attention network, controls the temperature of the battery module and improves the stability and the safety performance of the power battery module. The technical scheme provided by the invention is as follows: a power battery module for a new energy electric automobile and a cooling control method thereof comprise the following steps: A lower pressing plate of the battery cell; The battery cell fixing positions are respectively arranged on the battery cell lower pressing plate at equal intervals in an array mode along the transverse direction and the longitudinal direction; One end of each of the plurality of electric cores is arranged on the electric core fixing position in a matching way; the water channel mechanism is arranged in a pore between two adjacent rows of electric cores and is in close contact with the electric cores, and the water channels are distributed in an S shape among the electric cores; the two connecting ports are respectively communicated with two ends of the water channel; and the battery cell upper pressing plate is arranged at the top of the plurality of battery cells in a matching way. Preferably, the method further comprises: the copper bar lower pressing plate is arranged on the electric core upper pressing plate; The copper bar is arranged on the copper bar lower pressing plate; And the copper bar upper pressing plate is arranged on the copper bar. Preferably, the method further comprises: The upper cover plate is arranged on the copper bar upper pressing plate; The lower tray is arranged at the bottom of the battery cell lower pressing plate; the outer frame is of a cuboid structure and comprises four side faces which are sequentially connected, and is arranged outside the plurality of battery cells and matched with the upper cover plate and the lower tray to form an outer shell of the cuboid structure. Preferably, the waterway mechanism includes: A water channel; the water channel rubber is arranged outside the water channel, is of a continuous S-shaped structure and is matched with the plurality of electric cores; two water channel pipe heads are respectively arranged at two ends of the water channel in a matching way. The cooling control method for the power battery module of the new energy electric automobile is characterized by comprising the following steps of: Step one, establishing a graph model of a battery module, wherein each cell is used as a graph node, and the heat conduction and water channel coupling relationship among the cells is used as a graph edge; Acquiring the temperature of each cell according to a sampling period, extracting the time characteristic of each cell based on a time sequence convolution network, and aggregating the spatial heat correlation characteristics among the cells by using a graph annotation force network; thirdly, constructing a cooling control optimization model based on the predicted battery cell temperature change; ; In the formula, Is the firstThe average temperature of the step prediction is calculated,For the target temperature, set to 25C,Is the firstThe maximum temperature difference predicted by the step is calculated,For the flow control amount of the coolant,、、Is a weight coefficient; Step four, obtain