Battery module heating assembly

Abstract

The battery module heating assembly is arranged on a battery module and used for heating a battery cell, the heating assembly comprises a control module, a connecting module and a heating module, the heating module comprises a plurality of heating plates, a supporting frame is arranged around the heating plates, resistance heating wires are arranged in the heating plates, and the resistance heating wires are arranged in the supporting frame. The two ends of the resistance heating wire are connected with a positive electrode connector and a negative electrode connector respectively, a temperature sensor is further arranged in the heating plate, the temperature sensor is connected with a temperature connector through a wire, and the temperature connector, the positive electrode connector and the negative electrode connector are vertically and fixedly connected to the upper side surface of the supporting frame. The connecting module comprises a connecting bus, the temperature connector, the positive electrode connector and the negative electrode connector are all connected with the control module through the connecting bus, and control software is installed in the control module and used for receiving temperature data from the temperature sensor and controlling the heating plate to heat.

Description

Technical Field

[0001] The utility model relates to the field of new energy vehicle battery manufacturing, and in particular to a battery module heating component. Background Art

[0002] The power batteries of new energy vehicles currently on the market are usually composed of several battery modules, which in turn are composed of several closely arranged battery cells in series and parallel to provide higher voltage and capacity. The battery module also includes a battery management module (BMS), which is responsible for monitoring and managing the battery's charging and discharging process to ensure the battery's safety and stable performance.

[0003] The structure of a battery cell is usually composed of a positive electrode, a negative electrode and an electrolyte. Both the positive electrode and the negative electrode contain active substances and are usually the site of chemical reactions. The electrolyte is a liquid or solid that acts as an ion transmission medium, which helps to maintain ion flow in the battery cell. When the ambient temperature of the battery decreases, the flow of ions in the electrolyte will slow down, which will seriously affect the charging and discharging efficiency of the battery and seriously reduce the vehicle's cruising range. The more common solution at present is to use a heat pump system to heat the power battery at low temperatures. During the actual driving process of the vehicle, as the power is used and consumed, the battery module itself will also generate heat to increase its temperature. During the driving process, the vehicle only uses a group of battery modules in the power battery, which results in the battery module temperature in the power battery not being uniform. Because the heat pump system uses medium heating, it can only detect and heat the entire power battery. When the temperature of some groups of battery modules in the power battery rises due to discharge, and the heat pump system still heats them, it will cause heat waste in the heat pump system and reduce the vehicle's cruising range. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a battery module heating component.

[0005] The technical solution of the utility model is as follows:

[0006] A battery module heating component is arranged on the battery module and is used to heat the battery cell. The heating component includes a control module, a connection module and a heating module. The heating module includes a plurality of heating plates. The heating plates are arranged between adjacent battery cells. A support frame is arranged around the heating plates. The shape of the support frame matches the shape of the battery cell. The arrangement of the support frame can provide support for the heating plates. A resistance heating wire is arranged inside the heating plate. The two ends of the resistance heating wire are respectively connected to a positive electrode connector and a negative electrode connector. A temperature sensor is also arranged inside the heating plate. The temperature sensor is connected to a temperature connector through a wire. The temperature connector, the positive electrode connector and the negative electrode connector are vertically fixedly connected to the upper surface of the support frame. The connection module includes a connection bus, which includes a temperature bus, a positive bus and a negative bus. One end of the positive bus is connected to the control module, and the other end is connected to the positive connector of a plurality of heating plates. One end of the negative bus is connected to the control module, and the other end is connected to the negative connector of a plurality of heating plates. One end of the temperature bus is connected to the control module, and the other end is connected to the temperature connector of a plurality of heating plates. The integrated design of the connection bus can reduce the use of wiring harnesses. The control module is installed with control software, which is used to receive temperature data from a temperature sensor and control the heating of the heating plate. When the temperature of a group of battery modules of the power battery is too low, the heating assembly can heat the corresponding battery module separately.

[0007] In order to complete the connection between the temperature bus, positive bus and negative bus and the corresponding temperature connectors, positive connectors and negative connectors, the connection bus is composed of a bus shell and a connecting wire, the connecting wire is arranged in the bus shell, and the connection bus is provided with a connecting tube at the position corresponding to the temperature connector, positive connector and negative connector, the connecting tube is connected to the connecting wire, the inner diameter of the connecting tube matches the outer diameter of the corresponding temperature connector, positive connector or negative connector, and the temperature connector, positive connector and negative connector can be inserted into the corresponding connecting tube.

[0008] In order to prevent debris from entering the connecting tube and affecting the connection between the temperature connector, the positive connector and the negative connector and the connecting tube, sealing gaskets are provided at the roots of the temperature connector, the positive connector and the negative connector, and the connecting tube is provided with sealing grooves at the corresponding positions of the sealing gaskets.

[0009] Preferably, in order to further improve the sealing performance, 2-3 sealing gaskets are provided at the roots of the temperature connector, the positive connector and the negative connector, and the number of the sealing grooves inside the connecting tube is the same as the number of the sealing gaskets.

[0010] Furthermore, the bus housing is made of PVC material, which is light in weight and has flame retardant and insulating properties.

[0011] In order to improve the heating effect of the heating plate and increase the heating speed of the heating plate during heating, the arrangement shape of the resistance heating wire in the heating plate is S-shaped.

[0012] Furthermore, in order to improve the heat transfer efficiency between the heating plate and the surface of the battery cell and reduce the loss during the heat transfer process, silicone pads are arranged between the two side surfaces of the heating plate and the surface of the battery cell to improve the heat transfer efficiency.

[0013] Furthermore, in order to further improve the heat dissipation efficiency of the heating plate, both side surfaces of the heating plate are wavy, and the wavy surface design can increase the contact area between the heating plate and the silicone pad.

[0014] In order to improve the structural strength of the support frame and prevent the heating plate from being damaged by the accumulation of electric cells, the cross-sectional shape of the support frame includes an I-shape, and the support frame is made of aluminum alloy.

[0015] Furthermore, in order to prevent the support frame from being too thick and affecting the overall volume of the battery module, the support frame has a thickness of 3-5 mm.

[0016] The beneficial effects of the utility model are:

[0017] The utility model discloses a battery module heating component, which is arranged in units of battery modules, and heats the corresponding battery modules by monitoring the temperature of a single battery module group. Compared with the heat pump technology on the market, this technical solution is more sophisticated, effectively improving the heat utilization efficiency, reducing energy waste, and improving the vehicle's cruising range. Moreover, the heating module of the heating component is a heating plate arranged between the battery cells. During heating, the heating is more uniform, so that the battery module can be heated from the inside out, further reducing heat waste and achieving a better heating effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By reading the detailed description of the preferred embodiment below, the scheme and advantages of the present application will become clear to those skilled in the art. The accompanying drawings are only used to illustrate the preferred embodiment and are not considered to be limiting of the present invention.

[0019] In the attached picture:

[0020] Figure 1 is a schematic diagram of the battery module structure to which the heating assembly is applied;

[0021] Figure 2 is a schematic structural diagram of the heating plate;

[0022] Figure 3It is a schematic diagram of the local structure of the connection between the heating plate and the support block;

[0023] Figure 4 is a schematic diagram of the internal structure of the heating plate;

[0024] Figure 5 is a schematic diagram of the internal structure of the connection between the temperature bus and the temperature connector;

[0025] The components represented by the reference numerals in the figure are:

[0026] 1. Control module; 2. Connection module; 21. Connection bus; 22. Positive bus; 23. Negative bus; 24. Temperature bus; 25. Bus housing; 26. Connecting wire; 27. Connecting tube; 28. Sealing groove; 3. Heating module; 31. Heating plate; 32. Support frame; 33. Resistance heating wire; 34. Positive connector; 35. Negative connector; 36. Temperature connector; 37. Sealing gasket; 38. Temperature sensor; 39. Silicone grease pad. DETAILED DESCRIPTION

[0027] See also Figure 1-Figure 5A battery module heating component is arranged on the battery module and is used to heat the battery cell. The heating component includes a control module 1, a connection module 2 and a heating module 3. The heating module 3 includes a plurality of heating plates 31. The heating plates 31 are arranged between adjacent battery cells. A support frame 32 is arranged around the heating plates 31. The shape of the support frame 32 matches the shape of the battery cell. The setting of the support frame 32 can provide support for the heating plates 31 to prevent the heating plates 31 from being damaged by the backlog of adjacent battery cells. A resistance heating wire 33 is arranged inside the heating plate 31. The two ends of the resistance heating wire 33 are respectively connected to There are positive electrode connectors 34 and negative electrode connectors 35, and a temperature sensor 38 is also provided in the heating plate 31. The temperature sensor 38 is connected to a temperature connector 36 through a wire. The temperature connector 36, the positive electrode connector 34 and the negative electrode connector 35 are vertically fixedly connected to the upper surface of the support frame 32. The connection module 2 includes a connection bus 21, and the connection bus 21 includes a temperature bus 24, a positive electrode bus 22 and a negative electrode bus 23. One end of the positive electrode bus 22 is connected to the control module 1, and the other end is connected to the positive electrode connectors 34 of the plurality of heating plates 31. One end of the negative electrode bus 23 is connected to the control module 1. The positive and negative electrodes 22 and 23 of the heating plates 31 are connected to each other, and the other end is connected to the negative electrode connector 35 of the heating plates 31. The positive and negative electrode connectors 34 and 35 and the corresponding positive and negative electrode buses 22 and 23 can make the resistance heating wire 33 arranged inside the heating plate 31 connected to the control module 1 through the positive and negative electrode buses 22 and 23. One end of the temperature bus 24 is connected to the control module 1, and the other end is connected to the temperature connectors 36 of the heating plates 31. The temperature connector 36 can be connected to the control module 1 through the temperature bus 24 to convert the temperature data into an electrical signal and transmit it to the control module 1. The connection bus 21 The integrated design can reduce the use of wiring harnesses, reduce the probability of wiring harness failure, and also facilitate workers to assemble and install. The control module 1 is installed with control software, and the control software is used to receive temperature data from the temperature sensor 38 and control the heating plate 31 to heat. When the temperature of a group of battery modules of the power battery is too low, the heating component can heat the corresponding battery module separately. The battery module heating component is provided with a heating plate 31 between adjacent battery cells of the battery module, which can heat all battery cells in the battery module more evenly, thereby quickly and evenly increasing the overall temperature of the battery module and avoiding heat waste.

[0028] In order to complete the connection of the temperature bus 24, the positive bus 22 and the negative bus 23 with the corresponding temperature connector 36, the positive connector 34 and the negative connector 35, see Figure 5The connection bus 21 is composed of a bus shell 25 and a connection line 26, and the connection line 26 is arranged in the bus shell 25. The connection bus 21 is provided with a connection tube 27 at the position corresponding to the temperature connection head 36, the positive connection head 34 and the negative connection head 35. The connection tube 27 is connected to the connection line 26, and the inner diameter of the connection tube 27 matches the outer diameter of the corresponding temperature connection head 36, the positive connection head 34 or the negative connection head 35. The temperature connection head 36, the positive connection head 34 and the negative connection head 35 can be inserted into the corresponding connection tube 27 to complete the connection with the corresponding temperature bus 24, the positive bus 22 and the negative bus 23.

[0029] In order to prevent debris from entering the connecting tube 27 and affecting the connection between the temperature connecting head 36, the positive connecting head 34 and the negative connecting head 35 and the connecting tube 27, sealing gaskets 37 are provided at the roots of the temperature connecting head 36, the positive connecting head 34 and the negative connecting head 35, and the connecting tube 27 is provided with a sealing groove 28 at the corresponding position of the sealing gasket 37. The setting of the sealing gasket 37 and the sealing groove 28 can play a sealing role, and after the temperature connecting head 36, the positive connecting head 34 and the negative connecting head 35 are inserted into the connecting tube 27, debris is prevented from entering the connecting tube 27.

[0030] Preferably, in order to further improve the sealing performance, 2-3 sealing gaskets 37 are arranged at the roots of the temperature connector 36, the positive connector 34 and the negative connector 35, and the number of the sealing grooves 28 inside the connecting tube 27 is the same as the sealing gaskets 37, thereby further improving the sealing effect by arranging multiple sealing gaskets 37.

[0031] Furthermore, the bus housing 25 is made of PVC material. The PVC material is light in weight and has flame retardant and insulating properties, and is suitable for wrapping and protecting the connecting wires 26 .

[0032] In order to improve the heating effect of the heating plate 31 and the heating speed of the heating plate 31 during heating, see Figure 4 The arrangement shape of the resistance heating wire 33 in the heating plate 31 is S-shaped. The S-shaped arrangement can increase the overall length of the resistance heating wire 33, improve the overall heating value of the heating plate 31, and improve the heating effect while making the heat distribution of the heating plate 31 more uniform.

[0033] For further information, see Figure 2 and Figure 3In order to improve the heat transfer efficiency between the heating plate 31 and the surface of the battery cell and reduce the loss during heat transfer, silicone pads 39 are arranged between the two side surfaces of the heating plate 31 and the surface of the battery cell. On the one hand, the silicone pads 39 can fill the gap between the surface of the heating plate 31 and the surface of the battery cell to improve the heat transfer efficiency. On the other hand, they can play a buffering role to prevent adjacent batteries from damaging the heating plate 31.

[0034] Furthermore, in order to further improve the heat dissipation efficiency of the heating plate 31, the surfaces on both sides of the heating plate 31 are wavy. The wavy surface design can increase the contact area between the heating plate 31 and the silicone pad 39, so that the heat generated by the heating plate 31 can be transferred to the battery cell through the silicone pad 39 more quickly.

[0035] In order to improve the structural strength of the support frame 32, see Figure 3 To prevent the heating plate 31 from being damaged by the backlog of battery cells, the cross-sectional shape of the support frame 32 includes an I-shape, and the support frame 32 is made of aluminum alloy. The support frame 32 made of aluminum alloy has high hardness and is not easy to deform. The I-shaped cross-sectional shape can ensure the structural strength of the support frame 32 while reducing the weight of the support frame 32.

[0036] Furthermore, in order to prevent the thickness of the support frame 32 from being too thick and affecting the overall volume of the battery module, the thickness of the support frame 32 is 3-5 mm, which ensures the structural strength of the support frame 32 while preventing the thickness of the support frame 32 from affecting the overall volume of the battery module.

Claims

1. A battery module heating assembly, arranged on a battery module, for heating a battery cell, characterized in that: The heating assembly comprises a control module (1), a connection module (2) and a heating module (3); the heating module (3) comprises a plurality of heating plates (31); the heating plates (31) are arranged between adjacent battery cells; a support frame (32) is arranged around the heating plates (31); the shape of the support frame (32) matches the shape of the battery cell; a resistance heating wire (33) is arranged inside the heating plate (31); two ends of the resistance heating wire (33) are respectively connected to a positive electrode connector (34) and a negative electrode connector (35); a temperature sensor (38) is also arranged inside the heating plate (31); The temperature sensor (38) is connected to a temperature connector (36) via a wire; the temperature connector (36), the positive connector (34) and the negative connector (35) are vertically fixedly connected to the upper surface of the support frame (32); the connection module (2) comprises a connection bus (21); the temperature connector (36), the positive connector (34) and the negative connector (35) are all connected to the control module (1) via the connection bus (21); control software is installed in the control module (1); the control software is used to receive temperature data from the temperature sensor (38) and control the heating of the heating plate (31).

2. A battery module heating assembly according to claim 1, characterized in that: The connection bus (21) is composed of a bus housing (25) and a connection line (26), wherein the connection line (26) is arranged in the bus housing (25), and the connection bus (21) is provided with a connection tube (27) at the position corresponding to the temperature connection head (36), the positive connection head (34) and the negative connection head (35), wherein the connection tube (27) is connected to the connection line (26), and the inner diameter of the connection tube (27) matches the outer diameter of the corresponding temperature connection head (36), the positive connection head (34) or the negative connection head (35).

3. A battery module heating assembly according to claim 2, characterized in that: The roots of the temperature connector (36), the positive connector (34) and the negative connector (35) are all provided with sealing gaskets (37), and the connection tube (27) is provided with sealing grooves (28) at positions corresponding to the sealing gaskets (37).

4. A battery module heating assembly according to claim 3, characterized in that: The roots of the temperature connector (36), the positive connector (34) and the negative connector (35) are provided with 2-3 sealing gaskets (37), and the number of the sealing grooves (28) inside the connecting tube (27) is the same as the number of the sealing gaskets (37).

5. A battery module heating assembly according to claim 4, characterized in that: The bus housing (25) is made of PVC material.

6. A battery module heating assembly according to claim 1, characterized in that: The arrangement shape of the resistance heating wire (33) in the heating plate (31) is S-shaped.

7. A battery module heating assembly according to claim 6, characterized in that: Silicone grease pads (39) are provided between the two side surfaces of the heating plate (31) and the surface of the battery core.

8. A battery module heating assembly according to claim 7, characterized in that: Both side surfaces of the heating plate (31) are wavy.

9. A battery module heating assembly according to claim 1, characterized in that: The cross-sectional shape of the support frame (32) includes an I-shape, and the support frame (32) is made of aluminum alloy.

10. A battery module heating assembly according to claim 9, characterized in that: The thickness of the support frame (32) is 3-5 mm.

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