Power battery temperature monitoring system

Abstract

The embodiment of the utility model provides a power battery temperature monitoring system which is used for monitoring the temperature of a battery on at least one bearing frame. The power battery temperature monitoring system comprises a plurality of infrared image acquisition devices which are distributed on one or more bearing frames; the shooting direction is set to face the bearing frame or other bearing frames except the bearing frame, temperature data of a monitoring area on the bearing frame or other bearing frames are collected, and a temperature thermal image is formed; and the monitoring device is in communication connection with the plurality of infrared image acquisition devices and is used for receiving and displaying the temperature thermal images of the monitoring areas so as to form prompts according to the temperatures, displayed by the temperature thermal images, of the battery cabins in the monitoring areas. And temperature data are acquired through a plurality of infrared image acquisition devices, and a temperature thermodynamic image is formed. And the monitoring device can receive and display the temperature thermodynamic image of each monitoring area in real time, so that the real-time monitoring of the temperature of the battery is ensured.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of power battery, and particularly relates to a power battery temperature monitoring system. BACKGROUND

[0002] With the wide application of electric vehicles, energy storage systems and portable electronic devices, the demand for high-performance power batteries is increasing. A large amount of heat is generated in the charging and discharging process of the battery. If the temperature cannot be monitored and managed in time and effectively, the temperature of the battery will rise, affecting the performance and service life of the battery, and even causing safety accidents. The existing battery temperature monitoring mainly uses a contact type temperature sensor to detect the temperature of the battery in real time by installing the contact type temperature sensor on the surface or inside of the battery. The contact type temperature sensor needs to be in direct contact with the battery, and the installation and maintenance are relatively complex, and the measurement error is easily affected by environmental factors. SUMMARY

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present disclosure is to provide a power battery temperature monitoring system to solve the problems in the related art.

[0004] The first aspect of the present disclosure provides a power battery temperature monitoring system, wherein at least one battery temperature on a carrying frame is monitored, and the carrying frame comprises a plurality of battery compartments for storing power batteries.

[0005] The power battery temperature monitoring system comprises:

[0006] A plurality of infrared image acquisition devices are distributed on one or more carrying frames. The shooting direction of each infrared image acquisition device is arranged to face the carrying frame or other carrying frames outside the carrying frame, and the temperature data of a monitoring area on the carrying frame or other carrying frames is acquired and a temperature thermal image is formed. The monitoring area covers one or more battery compartments.

[0007] A monitoring device is in communication with the plurality of infrared image acquisition devices, receives and displays the temperature thermal image of each monitoring area, and forms a prompt through the temperature of each battery compartment in the monitoring area displayed by the temperature thermal image.

[0008] In an embodiment of the first aspect, the power battery temperature monitoring system further comprises a fire extinguishing device arranged above the at least one carrying frame for spraying fire extinguishing agent to the at least one carrying frame below.

[0009] In an embodiment of the first aspect, the carrying frames are arranged in multiple rows / rows, each infrared image acquisition device is installed on one / row of the carrying frames, and the shooting direction is arranged to face the monitoring area of the opposite one / row of the carrying frames.

[0010] In an embodiment of the first aspect, there is one / a row of carriers, each of the infrared image acquisition devices is installed at the end extending outward from the battery compartment side of the one / a row of carriers, and the shooting direction is set toward the monitoring area of ​​the one / a row of carriers.

[0011] In an embodiment of the first aspect, further comprising:

[0012] A main control unit is communicatively connected to the infrared image acquisition device and the fire-fighting device, and is used to control the action of the fire-fighting device according to the temperature data acquired by the infrared image acquisition device.

[0013] In an embodiment of the first aspect, further comprising:

[0014] at least one smoke alarm, disposed above the carrier, for sounding an alarm when smoke is detected;

[0015] and / or,

[0016] At least one smoke alarm is electrically connected to the fire-fighting device and is used to sound an alarm and trigger the fire-fighting device when smoke is detected.

[0017] In an embodiment of the first aspect, further comprising:

[0018] An alarm unit is electrically connected to the infrared image acquisition device and generates an alarm when the temperature data is abnormal.

[0019] In an embodiment of the first aspect, the carrier rack includes multiple layers of carrier partitions, and the multiple layers of carrier partitions are vertically spaced apart to separate and form multiple layers of battery pack storage areas arranged vertically.

[0020] In an embodiment of the first aspect, the carrier rack further includes: an outer shell, which surrounds the outer periphery of the carrier rack to allow the battery pack storage area to be open on one side, and at least one of the inner bottom wall and the inner top wall of the battery pack storage area and / or its inner peripheral wall forms a fireproof layer.

[0021] In an embodiment of the first aspect, the carrier further includes: at least one raising member, disposed above the carrying partition, for carrying the power battery to form a power battery leakage observation area between the power battery and the carrying partition.

[0022] The present disclosure has the following beneficial effects: the plurality of infrared image acquisition devices are distributed on one or more bearing frames, each infrared image acquisition device can cover one or more battery compartments, and comprehensive monitoring of all battery compartments is ensured. The infrared image acquisition device can acquire temperature data and form a temperature thermal image, which can intuitively display the temperature distribution of each battery compartment and help the staff to comprehensively understand the temperature condition of the battery. The monitoring device can receive and display the temperature thermal image of each monitoring area in real time, and ensure real-time monitoring of the battery temperature. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 A module connection schematic diagram of a power battery temperature monitoring system in an embodiment of the present disclosure is shown.

[0024] Figure 2 A structure schematic diagram of a power battery temperature monitoring system in an embodiment of the present disclosure is shown.

[0025] Figure 3 A module connection schematic diagram of a power battery temperature monitoring system in another embodiment of the present disclosure is shown.

[0026] Figure 4 A structure schematic diagram of a bearing frame in a power battery temperature monitoring system in an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0027] The embodiments of the present disclosure are described below through specific and concrete examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the disclosed information. The present disclosure can also be implemented or applied in different specific embodiments or modules, and the details in the present disclosure can be modified or changed according to different views and application modules without departing from the spirit of the present disclosure. It should be noted that the embodiments in the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0028] The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings, so that those skilled in the art can easily implement the present disclosure. The present disclosure can be embodied in various different forms, and is not limited to the embodiments described herein.

[0029] In the description of the present disclosure, the expressions "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. mean that the particular feature, structure, material or characteristic following the expressions are included in at least one embodiment or example of the present disclosure. Also, the expressions can include a particular feature, structure, material or characteristic in combination with one or more of the other features, structures, materials or characteristics in any one or more embodiments or examples. In addition, the different embodiments or examples of the present disclosure and the features of the different embodiments or examples can be combined and combined with each other, if not mutually exclusive.

[0030] In addition, the terms "first", "second", etc. are used only to indicate a purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "a group" is two or more, unless specifically limited.

[0031] In order to clearly illustrate the present disclosure, devices irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar constituent elements throughout the description.

[0032] Throughout the description, when it is said that a device is "connected" to another device, it includes not only the case of "direct connection", but also the case of "indirect connection" in which other elements are placed therebetween. In addition, when it is said that a device "includes" a certain constituent element, unless specifically stated to the contrary, other constituent elements are not excluded, but it means that other constituent elements can also be included.

[0033] Although the terms first, second, etc. are used herein to refer to various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first interface and a second interface, etc. are indicated. Furthermore, as used herein, the singular forms "a", "an" and "the" are intended to include plural forms, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises", "comprising", "includes" and / or "including", mean the presence of the stated features, steps, operations, elements, modules, items, kinds and / or groups, but do not exclude the presence or addition of one or more other features, steps, operations, elements, modules, items, kinds and / or groups. The terms "or" and "and / or" as used herein are to be interpreted as inclusive, or meaning either or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". This definition applies only when a combination of elements, functions, steps or operations are in some way specifically called out in a claim.

[0034] The professional terms used herein are only used to refer to specific embodiments and are not intended to limit the disclosure. The singular form used herein, unless the statement explicitly indicates the opposite meaning, also includes the plural form. In the specification, the meaning of "include" is to specify the specific features, regions, integers, steps, operations, elements and / or components, and does not exclude the presence or addition of other features, regions, integers, steps, operations, elements and / or components.

[0035] Although not defined differently, the technical terms and scientific terms used herein include the meanings commonly understood by those skilled in the art to which the disclosure belongs. The terms defined in the commonly used dictionary are additionally explained to have meanings consistent with the related technical literature and the currently prompted messages, unless defined, and should not be interpreted as ideal or very formal meanings.

[0036] In the related art, the temperature of the battery is measured by a contact temperature sensor, but the contact temperature sensor needs to be in direct contact with the battery, and the installation and maintenance are complex, and are easily affected by environmental factors, resulting in measurement errors.

[0037] In the present disclosure, the battery temperature is detected by an infrared image acquisition device, which uses a non-contact measurement method, does not need to be in direct contact with the battery, is easy to install and maintain, and is not affected by environmental factors. The infrared image acquisition device can collect temperature data in real time and form a temperature thermal image, and the monitoring device receives and displays these images through communication connection, realizing real-time monitoring of the battery temperature.

[0038] Figure 1 A module connection schematic diagram of a power battery temperature monitoring system in an embodiment of the present disclosure is shown.

[0039] Figure 2 A structure schematic diagram of a power battery temperature monitoring system in an embodiment of the present disclosure is shown.

[0040] As Figure 2 As shown in the example, an embodiment of the present disclosure provides a power battery temperature monitoring system for monitoring the temperature of the battery on at least one carrier frame 100, wherein the carrier frame 100 includes a plurality of battery compartments 110 for storing power batteries.

[0041] The power battery temperature monitoring system includes a plurality of infrared image acquisition devices 200 and a monitoring device.

[0042] A plurality of infrared image acquisition devices 200 are arranged on one or more of the racks 100. The number and position of the infrared image acquisition devices 200 can be adjusted according to the number of racks 100 to ensure that each battery compartment 110 can be effectively monitored. The shooting direction of each infrared image acquisition device 200 is arranged to face the rack 100 on which the infrared image acquisition device 200 is arranged or other racks 100, and to acquire temperature data of a monitoring area on the rack 100 on which the infrared image acquisition device 200 is arranged or other racks 100 and form a temperature thermal image. The monitoring area covers one or more battery compartments 110.

[0043] Specifically, in some embodiments, the racks 100 can be arranged in multiple rows, i.e., multiple racks 100 are arranged in multiple rows, or multiple rows of racks 100 are arranged in multiple rows, and the infrared image acquisition device 200 acquires temperature data of a corresponding monitoring area on an opposite rack 100. Each of the infrared image acquisition devices 200 is arranged on one of the racks 100 or one of the rows of racks 100, and the shooting direction is arranged to face the monitoring area of the opposite rack 100 or row of racks 100. For example, Figure 2 As shown in the example, the racks 100 arranged opposite each other are provided with infrared image acquisition devices 200, and the infrared image acquisition devices 200 are used to acquire temperature data of a monitoring area on the rack 100 arranged opposite. Assuming that the racks 100 are A and B, the shooting direction of the infrared image acquisition device 200 on the rack 100 A is arranged to face the monitoring area of the rack 100 B, and the shooting direction of the infrared image acquisition device 200 on the rack 100 B is arranged to face the monitoring area of the rack 100 A. In this way, each of the infrared image acquisition devices 200 can cover multiple battery compartments 110 on the opposite rack 100, ensuring comprehensive monitoring. This arrangement can effectively reduce the number of infrared image acquisition devices 200 required, while ensuring that each battery compartment 110 is monitored, taking into account the efficiency and cost of monitoring. Moreover, the infrared image acquisition devices 200 can be arranged directly on the rack 100 opposite the rack 100 on which the infrared image acquisition devices 200 are arranged (e.g., arranged at the top end), without the need for additional supports extending out of the rack 100, and the structure is simple and easy to set up.

[0044] Optionally, in some embodiments, when there is only one row or one rack 100, the infrared image acquisition device 200 can be arranged to acquire the temperature conditions of the battery compartments in the rack 100. That is, the rack 100 is one or a row, and the rack 100 is a single row or a single layout. Each of the infrared image acquisition devices 200 is mounted at the extended end of the one or a row of racks 100 outward from the side of the battery compartment 110 opening, such as the distal end of the support extending from the rack 100, and the shooting direction is arranged to face the monitoring area of the one / row of racks 100, i.e. image acquisition is performed in the direction of the extended end. Assuming that the rack 100 is C rows, the infrared image acquisition device 200 is mounted at the extended end of the C rows of battery compartments 110 outward from the side of the opening, and the shooting direction faces the monitoring area of the C rows. The monitoring area of each infrared image acquisition device 200 covers multiple battery compartments 110 on the C rows. This arrangement ensures that all battery compartments 110 on the single row of racks 100 are effectively monitored, avoiding monitoring blind spots and improving the reliability and accuracy of the system.

[0045] Optionally, the infrared image acquisition device 200 can use a high-resolution infrared camera to ensure the accuracy and reliability of the temperature data. The infrared camera converts the infrared radiation emitted by the object into an electrical signal, and then converts the electrical signal into a temperature value through a signal processing unit to generate a temperature thermal image. A high-resolution infrared camera can provide detailed temperature thermal images to help staff discover and handle abnormal situations in a timely manner.

[0046] In Figure 1 In an example, the monitoring device 300 is in communication connection with the plurality of infrared image acquisition devices 200, receives and displays the temperature thermal images of each of the monitoring areas to form a prompt through the temperature of each battery compartment 110 in the monitoring area displayed by the temperature thermal image. Wherein, the temperature thermal image forms different light and dark color / gray scale displays based on the temperature of the actual position photographed, such as the higher the temperature, the brighter the color (tending to be red), or the higher the temperature, the higher the gray scale.

[0047] Specifically, the monitoring device 300 is connected with the plurality of infrared image acquisition devices 200 through wired or wireless communication, receives and displays the temperature thermal images of each of the monitoring areas. The communication mode can use wireless communication technologies such as Wi-Fi, Bluetooth, Zigbee, or wired communication technologies such as Ethernet, to ensure the stability and real-time performance of data transmission.

[0048] Optionally, the monitoring device 300 can form a prompt by the temperature thermal image displayed in the monitoring area of each battery compartment 110, help the staff to find and handle the abnormal situation in time. The monitoring device 300 can be equipped with a display screen, and the staff can check the detailed information of each battery compartment 110 through the display screen and handle the abnormal situation. The display screen can be preferably a touch screen, and the staff can operate to display more information or perform control, etc. The monitoring device 300 can also be provided with an alarm function, and when the temperature anomaly is detected, an alarm signal is automatically sent to remind the staff to take corresponding measures.

[0049] Optionally, in Figure 1 In an example, the power battery temperature monitoring system further comprises a fire extinguishing device 400 arranged above the at least one carrying frame 100 for spraying fire extinguishing agent to the at least one carrying frame 100 below.

[0050] Specifically, the fire extinguishing device 400 comprises a plurality of spray heads connected to the fire extinguishing agent pipeline and distributed above the carrying frame 100. The spray range of each spray head covers one or more battery compartments 110, ensuring that the entire fire area can be quickly covered when a fire occurs. The fire extinguishing agent can be dry powder, carbon dioxide, water-based fire extinguishing agent, etc., and the specific selection is determined according to the battery type and environmental conditions. For example, for lithium batteries, dry powder or carbon dioxide fire extinguishing agent is recommended because these fire extinguishing agents do not conduct electricity and can effectively extinguish lithium battery fires. In some embodiments, the fire extinguishing device 400 can be connected with the monitoring device 300, and when the monitoring device 300 detects a temperature anomaly or a fire, the fire extinguishing device 400 is automatically started to spray fire extinguishing agent to the carrying frame 100 below. The control system can be set to manual or automatic mode to adapt to different use scenarios. In some embodiments, the staff can also determine whether the fire extinguishing device 400 needs to be started according to the prompt of the temperature thermal image displayed by the monitoring device 300.

[0051] Figure 3 A module connection schematic diagram of a power battery temperature monitoring system in another embodiment of the present disclosure is shown.

[0052] Optionally, in Figure 3 In an example, the power battery temperature monitoring system further comprises:

[0053] A main control unit 600 is in communication connection with the infrared image acquisition device 200 and the fire extinguishing device 400, and is used to control the action of the fire extinguishing device 400 according to the temperature data obtained by the infrared image acquisition device 200.

[0054] Specifically, the master control unit 600 receives the temperature thermal images from the infrared image acquisition device 200 through a communication module (such as Ethernet, RS-485, Wi-Fi, Zigbee). The central processing unit of the master control unit 600 processes and analyzes the collected temperature thermal images in real time to generate a temperature distribution map. According to the preset temperature threshold, the central processing unit determines whether the temperature of each battery compartment 110 exceeds the safe range. When the master control unit 600 detects temperature abnormalities or fire risks, it sends a control signal to the fire extinguishing device 400. After receiving the control signal, the fire extinguishing device 400 starts the fire extinguishing agent spraying system and sprays fire extinguishing agent to the designated carrier frame 100. In some embodiments, the master control unit 600 can also adjust the spraying amount and spraying time of the fire extinguishing agent according to the severity of the fire, to ensure the extinguishing effect. Optionally, the fire extinguishing device 400 sends a feedback signal to the master control unit 600 after completing the fire extinguishing agent spraying, to confirm that the fire extinguishing agent spraying is completed. Optionally, the master control unit 600 records the time, position and spraying amount of the fire extinguishing agent spraying, generates a fire extinguishing event log for subsequent analysis and reminds the staff.

[0055] Optionally, in Figure 2 In an example, the power battery temperature monitoring system further comprises:

[0056] At least one smoke alarm 500 is arranged above the carrier frame 100, which is used to alarm when detecting smoke.

[0057] Specifically, in some embodiments, when a fire occurs, the smoke alarm 500 detects smoke, and the smoke alarm 500 immediately sends an alarm signal to notify the staff.

[0058] Optionally, in Figure 3 In an example, the smoke alarm 500 can also be electrically connected to the fire extinguishing device 400, which is used to alarm when detecting smoke and trigger the fire extinguishing device 400 to act.

[0059] Specifically, the smoke alarm 500 can also trigger the fire extinguishing device 400 to perform fire extinguishing action through a relay or other electrical connection. After receiving the trigger signal, the fire extinguishing device 400 starts the fire extinguishing agent spraying system and sprays fire extinguishing agent to the designated carrier frame 100. Thus, the smoke alarm 500 can trigger the fire extinguishing device 400 to act, with fast response speed and the ability to extinguish the fire at the first time. The smoke alarm 500 and the fire extinguishing device 400 can operate independently, so that even if the master control unit 600 fails, the basic fire extinguishing function can be guaranteed.

[0060] Optionally, in Figure 3 In an example, the power battery temperature monitoring system further comprises:

[0061] An alarm unit 700 is electrically connected to the infrared image acquisition device 200 and generates an alarm when the temperature data is abnormal.

[0062] Specifically, the alarm unit 700 can send out an alarm signal through sound, light or other means to alert staff to abnormal situations.

[0063] Figure 4 A schematic structural diagram of a carrier 100 in a power battery temperature monitoring system according to an embodiment of the present disclosure is shown.

[0064] Optional, in Figure 4 In the diagram, the carrier rack 100 includes multiple layers of carrier separators 101, which are spaced vertically apart to form multiple vertically arranged battery pack storage areas 1011. Power batteries can be installed separately in the battery pack storage areas, so if one power battery catches fire, it will not immediately cause fire in other power batteries.

[0065] Optional, in Figure 4 In the diagram, the carrier rack 100 further includes: an outer shell 102, which surrounds the outer periphery of the carrier rack 100 to allow the battery pack storage area to be open on one side, and at least one of the bottom wall and the inner top wall and / or the inner peripheral wall of the battery pack storage area forms a fireproof layer.

[0066] Specifically, the outer shell 102 surrounds the outer periphery of the carrier 100, leaving the battery pack storage area open on one side for easy access. The outer shell 102 is made of high-temperature-resistant, flame-retardant materials (such as stainless steel and aluminum alloy) to ensure structural stability and fire resistance. The fireproof layer, made of materials such as fire-resistant paint and fireproof board, effectively prevents the spread of fire. The thickness of the fireproof layer can be adjusted according to actual needs.

[0067] Optional, in Figure 4 In the diagram, the carrier 100 further includes: at least one raising member 103, which is provided above the carrying partition and is used to carry the power battery to form a power battery leakage observation area between the power battery and the carrying partition.

[0068] Optionally, the heightening member 103 is strip-shaped, made of a metal material such as carbon steel, and hollow inside. The heightening member 103 is welded to the load-bearing partition, and multiple strip-shaped heightening members 103 are spaced apart along the length of the load-bearing partition. Depending on the length of the power battery and the stability requirements of the power battery load, more than two heightening members 103 can be selected to support the power battery. At the same time, it is understood that the number of heightening members 103 in the embodiment of the present disclosure includes but is not limited to this, and the number of heightening members 103 and the spacing between them can be adjusted as appropriate.

[0069] The above embodiments are only illustrative of the principles of the present disclosure and its effects, and are not intended to limit the present disclosure. Any modification or change made by any person skilled in the art without departing from the spirit and scope of the present disclosure shall be covered by the protection scope of the present disclosure.

Claims

1. A power cell temperature monitoring system, characterized by, The application discloses a power battery temperature monitoring system for monitoring the temperature of power batteries on at least one carrier frame. The power battery temperature monitoring system comprises: a plurality of infrared image acquisition devices arranged on one or more carrier frames; each infrared image acquisition device is arranged to face the carrier frame or other carrier frames and acquire temperature data of a monitoring area on the carrier frame or other carrier frames to form a temperature thermal image; the monitoring area covers one or more battery compartments; a monitoring device in communication with the plurality of infrared image acquisition devices to receive and display the temperature thermal image of each monitoring area to form a prompt through the temperature of each battery compartment in the monitoring area displayed by the temperature thermal image.

2. The power cell temperature monitoring system of claim 1, wherein, The power battery temperature monitoring system further comprises a fire extinguishing device arranged above the at least one carrier frame to spray fire extinguishing agent downward to the at least one carrier frame.

3. The power cell temperature monitoring system of claim 1, wherein, The carrier frames are arranged in multiple rows; each infrared image acquisition device is arranged on one of the carrier frames and faces the monitoring area of the opposite carrier frame.

4. The power cell temperature monitoring system of claim 1, wherein, The carrier frames are arranged in one row; each infrared image acquisition device is arranged on the extension end of the carrier frame outside the battery compartment opening and faces the monitoring area of the carrier frame.

5. The power cell temperature monitoring system of claim 2, wherein, The application further comprises: a main control unit in communication with the infrared image acquisition devices and the fire extinguishing device to control the action of the fire extinguishing device according to the temperature data acquired by the infrared image acquisition devices.

6. The power cell temperature monitoring system of claim 2, wherein, The application further comprises: at least one smoke alarm arranged above the carrier frame to alarm when smoke is detected; and / or, at least one smoke alarm electrically connected to the fire extinguishing device to alarm when smoke is detected and trigger the action of the fire extinguishing device.

7. The power cell temperature monitoring system of claim 1, wherein, The application further comprises: an alarm unit electrically connected to the infrared image acquisition devices to alarm when the temperature data is abnormal.

8. The power cell temperature monitoring system of claim 1, wherein, The carrier frame comprises a plurality of carrier separators arranged vertically to form a plurality of battery pack storage areas arranged vertically.

9. The power cell temperature monitoring system of claim 8, wherein, The carrier frame further comprises a shell surrounding the outer periphery of the carrier frame to leave one side of the battery pack storage area open; at least one of the inner bottom wall and the inner top wall of the battery pack storage area and / or the inner peripheral wall thereof forms a fireproof layer.

10. The power cell temperature monitoring system of claim 8, wherein, The carrier frame further comprises at least one heightening member arranged above the carrier separator to carry the power battery to form a power battery leakage observation area between the power battery and the carrier separator.

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