Energy storage battery module with heating film structure

Abstract

The utility model relates to the technical field of batteries, and discloses an energy storage battery module with a heating film structure, which comprises a battery module body and a heating film, the heating film covers the outer side of the battery module body, the heating film is connected in series with a temperature controller for monitoring the temperature of a battery cell, and the temperature controller is arranged on the battery cell of the battery module body; the temperature controller is used for monitoring the temperature of the battery cell in the battery module body, and when the temperature of the battery cell reaches a set range, the temperature controller is used for cutting off the power supply of the heating film, so that the battery cell is prevented from being heated to exceed the rated working temperature, the service life is not influenced, the continuous heating of the heating film is prevented from influencing the performance of the battery, and the problem of MOS switch failure of the heating film is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of battery, specifically, relate to the energy storage battery module with heating film structure. BACKGROUND

[0002] Secondary battery may have side reaction during charging process when temperature is too low (≤10 DEG C), and the product separated out can cause puncture risk to battery separator, thereby causing thermal runaway of lithium battery, therefore, in order to avoid the occurrence of thermal runaway phenomenon, a heating film is designed on the battery pack to heat the secondary battery under low temperature, so that the secondary battery is charged at appropriate charging temperature, and safety accidents are avoided.

[0003] At present, the switch of the heating film is controlled by BMS or initiated by BMS PCS control, when powered by BMS, whether the MOS switch of the heating film is stuck cannot be effectively judged, if the BMS is stuck, the heating film will continue to heat, and the secondary battery will reach the protection temperature, and protection will be started, so that the performance of the battery cannot be fully utilized. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing energy storage battery module with heating film structure, which aims at solving the problem of MOS switch failure of the heating film in the prior art.

[0005] The utility model is realized in this way, energy storage battery module with heating film structure, including battery module body and heating film, the heating film covers on the outside of battery module body, the heating film is connected with temperature controller for monitoring battery cell temperature in series, the temperature controller is installed on the battery cell of battery module body.

[0006] Further, one end of the temperature controller is electrically connected with one end of the external power supply, the other end of the temperature controller is electrically connected with one end of the heating film, and the other end of the heating film is electrically connected with the other end of the external power supply.

[0007] Further, the heating film has a connection end protruding upward, the connection end and the temperature controller are arranged at a relative interval, the other end of the temperature controller is electrically connected with one end of the connection end, and the other end of the connection end is electrically connected with the other end of the external power supply.

[0008] Further, the heating film has a plurality of internal heating fins protruding towards the battery module body, a plurality of the internal heating fins are sequentially and intervaliy arranged along the length direction of the battery module body, the inner end of the internal heating fin is connected with the heating film, and the outer end of the internal heating fin is located in the battery module body.

[0009] Further, the battery module body comprises a module frame and a plurality of battery cells, the plurality of battery cells are sequentially inserted into the module frame along the length direction of the module frame, and installation gaps are formed between adjacent battery cells, the internal heating sheet is inserted into the installation gap, and two sides of the internal heating sheet abut on adjacent battery cells respectively.

[0010] Further, the temperature controller comprises an insulating base and a conductive cover, the conductive cover and the insulating base form a sealed space, the insulating base is provided with a static contact end point, the static contact end point is located in the sealed space, the conductive cover is provided with a movable contact mechanism, and the movable contact mechanism is located in the sealed space.

[0011] When the movable contact mechanism is moved to separate from the static contact end point, the circuit is cut off, and the heating film is disconnected with the external power supply through the temperature controller;

[0012] When the movable contact mechanism is moved to abut on the static contact end point, the circuit is turned on, and the heating film is connected with the external power supply through the temperature controller.

[0013] Further, the movable contact mechanism and the static contact end point are arranged in relative spacing.

[0014] Further, the insulating base is provided with a first wire, one end of the first wire is connected with the static contact end point, and the other end of the first wire is electrically connected with the heating film.

[0015] The conductive cover is provided with a second wire, one end of the second wire is connected with the movable contact mechanism, and the other end of the second wire is electrically connected with the external power supply.

[0016] Further, the movable contact mechanism comprises a bimetallic sheet, one end of the bimetallic sheet is fixed on the conductive cover through a fixing nail, and the other end of the bimetallic sheet is located above the static contact end point.

[0017] Further, the bimetallic sheet is a memory metal.

[0018] Compared with the prior art, the energy storage battery module with the heating film structure provided by the utility model monitors the temperature of the battery cell in the battery module body through the temperature controller, when the temperature of the battery cell reaches the set range, the heating film is disconnected with the power supply through the temperature controller, the battery cell is not heated to exceed the rated working temperature, the service life of the battery cell is affected, the performance of the battery is affected by the continuous heating of the heating film, and the problem that the MOS switch of the heating film is invalid is solved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 is the three-dimensional schematic view of the energy storage battery module with the heating film structure provided by the utility model;

[0020] Fig. 2 is a top view structural schematic diagram of the energy storage battery module with the heating film structure provided by the utility model;

[0021] Fig. 3 is a cut structure schematic diagram of the temperature controller provided by the utility model.

[0022] In the drawing: battery module body 10, heating film 20, temperature controller 30, module frame 11, electric core 12, installation gap 13, connecting end 21, internal heating sheet 22, insulating base 31, conductive cover 32, sealed space 33, static contact end point 34, moving contact mechanism 35, bimetallic sheet 36, fixed nail 37. DETAILED DESCRIPTION

[0023] In order to make the utility model purposes, technical solutions and advantages more clearly, the following is combined with the drawings and examples, and the utility model is further described in detail. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.

[0024] The implementation of the utility model is described in detail in combination with specific examples.

[0025] The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar parts; in the description of the utility model, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and not to indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore the positional relationship described in the drawings is only used for example, and cannot be understood as a limitation of the utility model, for those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0026] Referring to Figs. 1-3 As shown in the preferred embodiment provided by the utility model.

[0027] The energy storage battery module with the heating film 20 structure includes the battery module body 10 and the heating film 20, the heating film 20 is covered on the outer side of the battery module body 10, the temperature controller 30 for monitoring the temperature of the electric core 12 is connected in series on the heating film 20, and the temperature controller 30 is installed on the electric core 12 of the battery module body 10.

[0028] The energy storage battery module provided by the above-mentioned heating film 20 structure is monitored by the temperature controller 30 to monitor the temperature of the battery cell 12 in the battery module body 10. When the temperature of the battery cell 12 reaches the set range, the power supply of the heating film 20 is disconnected by the temperature controller 30, so that the battery cell 12 is not heated beyond its rated working temperature, which affects its service life. The problem of the heating film 20 continuously heating the battery performance is solved, and the problem of the MOS switch failure of the heating film 20 is solved.

[0029] The temperature controller 30 is a micro temperature control switch, which reduces the volume occupied by the temperature controller 30 and improves the safety of the temperature controller 30.

[0030] In this embodiment, one end of the temperature controller 30 is electrically connected to one end of the external power supply, the other end of the temperature controller 30 is electrically connected to one end of the heating film 20, and the other end of the heating film 20 is electrically connected to the other end of the external power supply. In this way, the heating film 20 can be disconnected from the external power supply by the temperature controller 30, so as to improve the control of the heating film 20.

[0031] In this embodiment, the heating film 20 has a connection end 21 protruding upward, the connection end 21 is arranged in relative spacing between the temperature controller 30, the other end of the temperature controller 30 is electrically connected to one end of the connection end 21, and the other end of the connection end 21 is electrically connected to the other end of the external power supply. In this way, the connection relationship between the connection end 21 and the temperature controller 30 can be increased, so as to improve the control of the heating film 20.

[0032] In this embodiment, the heating film 20 has a plurality of internal heating pieces 22 protruding toward the battery module body 10, the plurality of internal heating pieces 22 are arranged in sequence along the length direction of the battery module body 10, the inner end of the internal heating piece 22 is connected to the heating film 20, and the outer end of the internal heating piece 22 is located in the battery module body 10. In this way, the heating film 20 can improve the efficiency and effect of heating the battery module body 10 through the plurality of internal heating pieces 22.

[0033] In this embodiment, the battery module body 10 includes a module frame 11 and a plurality of battery cells 12, the plurality of battery cells 12 are sequentially inserted into the module frame 11 along the length direction of the module frame 11, and the installation gap 13 is formed between the adjacent battery cells 12. The internal heating piece 22 is inserted into the installation gap 13, and the two sides of the internal heating piece 22 abut on the adjacent battery cells 12, respectively.

[0034] The heating film 20 is inserted into the installation gap 13 through the plurality of internal heating pieces 22, so as to increase the contact area between the internal heating piece 22 and the battery cell 12, thereby increasing the heating efficiency of the battery module body 10, and the control process of the heating temperature is also more simple and reliable.

[0035] In the embodiment, the temperature controller 30 comprises an insulating base 31 and a conductive cover 32, the conductive cover 32 and the insulating base 31 enclose a sealed space 33, the insulating base 31 is provided with a static contact end 34, the static contact end 34 is located in the sealed space 33, the conductive cover 32 is provided with a movable contact mechanism 35, the movable contact mechanism 35 is located in the sealed space 33;

[0036] When the movable contact mechanism 35 moves away from the static contact end 34, the circuit is cut off, and the heating film 20 is disconnected from the external power supply through the temperature controller 30;

[0037] When the movable contact mechanism 35 moves to abut against the static contact end 34, the circuit is turned on, and the heating film 20 is connected to the external power supply through the temperature controller 30.

[0038] The static contact end 34 and the movable contact mechanism 35 are arranged in the sealed space 33, and their working state is not affected by the external environment, which improves the reliability of the temperature controller 30. Meanwhile, the movable contact mechanism 35 is arranged in the sealed space 33, so that the movable contact mechanism 35 moves in a limited space, which reduces the required moving space of the temperature controller 30.

[0039] The movable contact mechanism 35 and the static contact end 34 are arranged in relative spacing.

[0040] In the embodiment, the insulating base 31 is provided with a first wire, one end of the first wire is connected to the static contact end 34, and the other end of the first wire is electrically connected to the heating film 20.

[0041] The conductive cover 32 is provided with a second wire, one end of the second wire is connected to the movable contact mechanism 35, and the other end of the second wire is electrically connected to the external power supply. In this way, the external power supply can supply power to the heating film 20 through the conduction between the first wire and the second wire.

[0042] In the embodiment, the movable contact mechanism 35 comprises a bimetallic strip 36, one end of the bimetallic strip 36 is fixed on the conductive cover 32 through a fixing nail 37, and the other end of the bimetallic strip 36 is located above the static contact end 34.

[0043] The bimetallic strip 36 is a memory metal.

[0044] When the temperature of the battery cell 12 decreases to a set range, the bimetallic strip 36 deforms and abuts against the static contact end 34, the circuit is turned on, and the heating film 20 is powered on to heat the battery module body 10; when the working temperature of the battery cell 12 of the battery module body 10 rises to a preset temperature, the bimetallic strip 36 returns to its original shape, the circuit is cut off, and the heating of the heating film 20 to the battery module body 10 is ended.

[0045] Specifically, it can be referred that the nickel-titanium alloy becomes soft at low temperature because of reversible phase change of its crystal structure. The nickel-titanium alloy is in a low-temperature phase called martensite at low temperature, at which time the alloy presents plasticity and stretchability; when subjected to thermal stimulation or external force, the nickel-titanium alloy is converted into a high-temperature phase, i.e. austenite, and returns to its original shape, which is called superelasticity.

[0046] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An energy storage battery module with a heating film structure, characterized in that, The application relates to a battery module body and a heating film covering the outer side of the battery module body, wherein a temperature controller for monitoring the temperature of a battery cell is connected in series on the heating film, and the temperature controller is installed on the battery cell of the battery module body. One end of the temperature controller is electrically connected with one end of an external power supply, the other end of the temperature controller is electrically connected with one end of the heating film, and the other end of the heating film is electrically connected with the other end of the external power supply. The heating film is provided with a connecting end protruding upwards, and the connecting end is arranged in relative spacing with the temperature controller; the other end of the temperature controller is electrically connected with one end of the connecting end, and the other end of the connecting end is electrically connected with the other end of the external power supply. The heating film is provided with a plurality of internal heating pieces protruding towards the battery module body, and the plurality of internal heating pieces are sequentially and spacedly arranged along the length direction of the battery module body; the inner end of the internal heating piece is connected with the heating film, and the outer end of the internal heating piece is located in the battery module body. The battery module body comprises a module frame and a plurality of battery cells, and the plurality of battery cells are sequentially and inserted in the module frame along the length direction of the module frame; the installation gap is formed between the adjacent battery cells, and the internal heating piece is inserted in the installation gap, and the two sides of the internal heating piece are respectively abutted on the adjacent battery cells.

2. The energy storage battery module with a heating film structure of claim 1, wherein, The temperature controller comprises an insulating base and a conductive cover, and the conductive cover and the insulating base form a sealed space; the insulating base is provided with a static contact point, and the static contact point is located in the sealed space; and the conductive cover is provided with a movable contact mechanism, and the movable contact mechanism is located in the sealed space. When the movable contact mechanism is separated from the static contact point, the circuit is cut off, the heating film and the external power supply are disconnected through the temperature controller; When the movable contact mechanism is abutted with the static contact point, the circuit is turned on, and the heating film and the external power supply are connected through the temperature controller.

3. The energy storage battery module with a heating film structure of claim 2, wherein, The movable contact mechanism and the static contact point are arranged in relative spacing.

4. The energy storage battery module with a heating film structure of claim 3, wherein, The insulating base is provided with a first wire, one end of the first wire is connected with the static contact point, and the other end of the first wire is electrically connected with the heating film; The conductive cover is provided with a second wire, one end of the second wire is connected with the movable contact mechanism, and the other end of the second wire is electrically connected with the external power supply.

5. The energy storage battery module with a heating film structure of claim 4, wherein, The movable contact mechanism comprises a bimetallic strip, one end of the bimetallic strip is fixed on the conductive cover through a fixing nail, and the other end of the bimetallic strip is located above the static contact point.

6. The energy storage battery module with a heating film structure of claim 5, wherein, The bimetallic strip is a memory metal.

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