CN216055060U - Battery pack and vehicle - Google Patents

Abstract

The application discloses battery package and vehicle. The battery pack includes: the electric core group is arranged in the tray; at least one protective frame is arranged in the tray, the tray is divided by the protective frame to form at least one first accommodating area, and a second accommodating area is arranged in the protective frame; the battery core group comprises at least one first battery cell module and at least one second battery cell module, the second battery cell module is placed in the accommodating area, and the first battery cell module is electrically connected with the second battery cell module; the security of first electric core module is greater than the security of second electric core module.

Description

Battery pack and vehicle

Technical Field

The present application relates to the field of battery technology, more specifically, the present application relates to a battery package and vehicle.

Background

The conventional vehicle power battery on the market at present mainly comprises two components: the first method comprises the following steps: the LFPs of the lithium iron phosphate cores are connected in series or in parallel to form a module, and then the module is connected in series and in parallel to form a battery pack; and the second method comprises the following steps: the NCMs are connected in series or in parallel to form a module and then connected in series and parallel to form the battery pack.

However, the SOC-OCV (state of charge-open circuit voltage) curve of the first battery pack is very flat, and during actual use, the SOC accuracy is poor, which greatly affects the endurance mileage.

The use safety of the second battery pack cannot be guaranteed, and battery safety accidents are easy to happen.

Therefore, how to balance and handle the battery pack better is a problem which needs to be solved urgently.

SUMMERY OF THE UTILITY MODEL

An object of the present application is to provide a new solution for a battery pack and a vehicle.

According to a first aspect of embodiments herein, there is provided a battery pack. The battery pack includes:

the electric core group is arranged in the tray;

at least one protective frame is arranged in the tray, the tray is divided by the protective frame to form at least one first accommodating area, and a second accommodating area is arranged in the protective frame;

the battery core group comprises at least one first battery cell module and at least one second battery cell module, the first battery cell module is placed in the first accommodation area, the second battery cell module is placed in the second accommodation area, and the first battery cell module and the second battery cell module are electrically connected;

the security of first electric core module is greater than the security of second electric core module.

Optionally, the first battery cell module is at least one of a lithium iron phosphate battery cell module and a lithium manganate battery cell module;

the second battery cell module is at least one of a ternary lithium battery cell module and a polymer lithium battery cell module.

Optionally, the protective frame is fixed in the tray, and a channel communicated with the outside is formed between the protective frame and the tray.

Optionally, the protective frame comprises a substrate having a hollow structure forming a first channel; the tray is formed with a second channel;

the protective frame is fixed in the tray, and the first channel and the second channel form the channel.

Optionally, the second cell module is formed by connecting a plurality of second cells; the second battery cell is a cylindrical battery or a soft package battery.

Optionally, the second battery cell module is a cylindrical battery, and the protection frame includes a fixing cover and a fixing base;

a plurality of first positioning holes are formed in the fixed cover along a first direction of the fixed cover;

a plurality of second positioning holes corresponding to the first positioning holes are formed in the fixed base along the first direction of the fixed base;

each cylindrical battery respectively penetrates through the first positioning hole and the second positioning hole, and the cylindrical batteries provided with the fixing covers and the fixing bases are arranged in the second containing areas.

Optionally, the cylindrical battery mounted with the fixing cover and the fixing base is fixed in the second accommodation region by a first adhesive.

Optionally, the second cell module is a soft package battery, and the protection frame includes a fixing cover;

the second battery cell module is arranged in the second containing area, the fixing cover is fixed to the top of the second battery cell module through a second adhesive, and the bottom of the second battery cell module is connected with the protection frame through a third adhesive.

Optionally, a second pressure relief valve is arranged on the second cell module, and/or a first pressure relief valve is arranged on the first cell module;

the second battery cell module is arranged in the protective frame, and the second pressure release valve is arranged towards the bottom of the protective frame; the first battery cell module is arranged in the tray, and the first pressure release valve faces to the bottom of the tray.

Optionally, a first electrical lead-out part and a second electrical lead-out part are arranged on the second cell module;

one end of the first electrical lead-out part is electrically connected with the second battery cell module, and the other end of the first electrical lead-out part is electrically connected with the first battery cell module;

one end of the second electric leading-out part is electrically connected with the second battery cell module, and the other end of the second electric leading-out part is electrically connected with the second battery cell module.

Optionally, the protective frame is a metal part.

According to a second aspect of embodiments of the present application, a vehicle is provided. The vehicle includes the battery pack according to the first aspect.

The technical effect of this application lies in, this application embodiment provides a battery package, is provided with first electric core module and second electric core module in the battery package, and wherein the security of first electric core module is greater than the security of second electric core module, and this application links together the different electric core module of two kinds of security and has formed the battery package, and the dominant disadvantage of the electric core module of two kinds of differences remedies each other, has balanced the security of battery package, has promoted the duration of a journey ability of battery package.

Be provided with first electric core module and second electric core module in this application battery package, the security of second electric core module is less than the security of first electric core module. Even the thermal runaway phenomenon takes place for second electric core module, because this application sets up second electric core module in the protective frame of tray, protective frame plays protection and restraint effect to second electric core module, and the heat that second electric core module produced can not quick conduction to first electric core module, has avoided second electric core module to cause the safety risk to first electric core module.

Further features of the present application and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.

Fig. 1 is a schematic structural diagram of a battery pack according to an embodiment of the present application.

Fig. 2 is a first exploded view of a battery pack according to an embodiment of the present invention.

Fig. 3 is a first exploded view of a protective frame (second cell module) according to an embodiment of the present invention.

Fig. 4 is an exploded view of a battery pack according to an embodiment of the present invention.

Fig. 5 is a second exploded view of a protective frame (a second cell module) according to an embodiment of the present invention.

Description of reference numerals:

1. the electric core group; 11. a first cell module; 12. a second cell module; 121. a first electrical lead-out; 122. a second electrical lead-out;

2. a tray; 21. a protective frame; 211. a substrate; 212. a fixed cover; 213. a fixed base; 2111. a first channel; 2121. a first positioning hole; 2131. a second positioning hole; 214. a frame upper cover; 215. a power take-off;

31. a first adhesive; 32. a second adhesive; 33. and a third adhesive.

Detailed Description

Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses.

Techniques and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be considered a part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

According to a first aspect of the present application, a battery pack is provided. Referring to fig. 1 to 5, the battery pack includes: the electric core group 1 is arranged in the tray 2.

At least one protection frame 21 is provided in the tray 2, the tray 2 is partitioned by the protection frame to form at least one first accommodation region, and a second accommodation region is provided in the protection frame 21.

The battery pack 1 comprises at least one first battery cell module 11 and at least one second battery cell module 12, the first battery cell module 11 is placed in a first containing area, the second battery cell module 12 is placed in a second containing area, and the first battery cell module 11 is electrically connected with the second battery cell module 12.

The security of first battery cell module 11 is greater than the security of second battery cell module 12.

Specifically, the battery pack comprises a battery cell pack 1 and a tray 2, wherein the battery cell pack 1 is fixedly arranged in the tray 2. The battery pack 1 includes at least one first cell module 11 and at least one second cell module 12. The first cell module 11 is electrically connected to the second cell module 12.

For example, the first cell module 11 is formed by connecting first cells. The first cells may be connected in series or in parallel or the first cells may be connected in a series-parallel combination.

The second cell module 12 is formed by connecting second cells. The first cells may be connected in series or in parallel or the second cells may be connected in a series-parallel combination.

The first cell module 11 and the second cell module 12 may be connected in series or in parallel or the first cell module 11 and the second cell module 12 may be connected in series and parallel.

It should be noted that, in the embodiment of the present application, a connection manner of the first battery cell, the second battery cell, and the first battery cell module 11 and the second battery cell module 12 is not particularly limited, and only a requirement of a user on a battery parameter (for example, a parameter such as a battery pack voltage) needs to be met.

In a specific embodiment, referring to fig. 1, the battery pack includes two sets of first cell modules 11 and one set of second cell modules 12. The second cell module 12 is located between the two sets of first cell modules 11, and is electrically connected to the two sets of first cell modules 11, respectively. For example, the battery pack may be a power battery pack.

At least one protective frame 21 is provided in the tray 2 of the present application, and the tray 2 is partitioned by the protective frame 21 to form at least one first receiving area. For example, the protective frame 21 is disposed near an edge of the tray 2, in which case the tray 2 is partitioned into a first receiving area. Or the protective frame 21 is provided at the central region of the tray 2, when the tray 2 is partitioned into two first receiving regions.

Wherein the number of the protective frames 21 is the same as the number of the second cell modules 12. That is, the number of the protective frames 21 corresponds to the number of the second cell modules 12 one to one. This application second electricity core module 12 sets up in the second of protective frame 21 holds the region, and first electricity core module 11 sets up in the first of tray 2 holds the region.

It should be noted that: the present application does not particularly limit the position where the protection frame 21 is disposed. The protective frame 21 may be provided in other areas such as an edge area or a middle area of the tray 2.

The security of this application second electricity core module 12 is less than the security of first electricity core module 11.

The energy density and safety of the battery pack are always concerns in the industry, and especially the safety of the power battery is always a sensitive topic. For example, the cell energy density refers to: the average unit volume or mass of the battery. Battery energy density-battery capacity x discharge plateau/battery thickness/battery width/battery length. Under the unanimous condition of the platform parameter of discharging, battery thickness, battery width and battery length of first electric core module 11 and second electric core module 12, the battery capacity of second electric core module 12 is greater than the battery capacity of first electric core module 11.

The safety of a battery can be reflected by the "severity of the failure reaction" of the battery, i.e., the "thermal failure capability". Generally, the "severity of the failure reaction" is higher for cells with higher energy density. On the one hand, the higher the energy density of the battery, the more electricity can be stored under the same volume or weight, and the heat generation is larger when the battery is in an internal short circuit; on the other hand, because of the common high energy density products, the diaphragm is thinner, the processing of the positive plate/the negative plate is more limited, the control difficulty of the production process is higher, and the short circuit in the use process is more likely to occur. Therefore, in general, the higher the energy density of the battery, the higher the probability of short circuit in the battery, and the higher the energy density of the battery, the lower the safety.

However, ideally, it is desirable to increase the energy density of the battery while maintaining the same level of safety, but in this respect, this ideal is a conflicting problem, and therefore, how to balance the energy density of the battery pack and the safety of the battery is a consideration.

The security of this application second electricity core module 12 is less than the security of first electricity core module 11 to a certain extent. Therefore, the second cell module 12 is more likely to be thermally failed than the first cell module 11.

This application sets up second electric core module 12 in protective frame 21, even second electric core module 12 takes place the thermal runaway, protective frame 21 also can play the guard action to second electric core module 12, has avoided second electric core module 12 to cause the safety risk to first electric core module 11 or whole battery package, has improved the security of whole battery package. Specifically, under the thermal runaway's the condition appears in second electricity core module 12, protective frame 21 can regard as the barrier in order to ensure the security of whole battery package, has avoided battery package or first electricity core module 11 to receive the security risk of second electricity core module 12.

In one embodiment, referring to fig. 1 to 5, the first cell module 11 is at least one of a lithium iron phosphate cell module and a lithium manganate cell module;

the second cell module 12 is at least one of a ternary lithium cell module and a polymer lithium cell module.

Specifically, in one embodiment, a plurality of lithium iron phosphate cells are connected to form a lithium iron phosphate cell module, and the plurality of lithium iron phosphate cell modules are connected in a battery pack.

In one embodiment, a plurality of lithium manganate battery cores are connected to form a lithium manganate battery core module, and a plurality of lithium manganate battery core modules are connected in a battery pack.

In yet another embodiment, at least one lithium iron phosphate cell module and at least one lithium iron manganate cell module are connected in a battery pack.

In one embodiment, a plurality of ternary lithium cells are connected to form a ternary lithium cell module, and the ternary lithium cell modules are connected in a battery pack.

In another embodiment, a plurality of polymer lithium cells form a polymer cell module, and in a battery pack, the plurality of polymer cell modules are connected.

In yet another embodiment, at least one ternary lithium battery cell module is connected with at least one polymer battery cell module in a battery pack.

In a specific embodiment, the first cell module 11 is a lithium iron phosphate cell module. The second cell module 12 is a ternary lithium cell module. The ternary lithium battery cell module is arranged in the protective frame 21.

The energy density of the lithium iron phosphate core module is lower than that of a ternary lithium core module; the SOC estimation precision of the whole lithium iron phosphate core module is low; the high temperature resistance of the ternary lithium battery cell module relative to the lithium iron phosphate battery cell module is poor, and the safety is low.

This application ternary lithium cell module and lithium iron phosphate core module constitute the battery package, have both utilized the stable advantage of lithium iron phosphate core module high temperature, and make full use of ternary lithium cell module high energy density characteristic has compensatied the inferior potential of lithium iron phosphate core again, has improved the energy density of battery package, combines the characteristics that ternary lithium cell module OCV-SOC curve slope is bigger than lithium iron phosphate core module in addition, promotes the SOC calculation accuracy of whole package battery BMS system.

The embodiment of the application integrates the ternary lithium battery cell module in the protective frame 21, and even if the ternary lithium battery cell module has a thermal runaway phenomenon, the ternary lithium battery cell module has the constraint of the protective frame 21, and the ternary lithium battery cell module or the whole battery pack cannot cause the thermal runaway to cause the fire and other risks. And ternary lithium cell module has 21 protections of protective frame in this application embodiment, even striking or other battery package outside collisions, also can not directly harm ternary lithium cell module and appear extrusion deformation or pierce through the scheduling problem, has further promoted the security of battery package.

In one embodiment, as shown in fig. 2 and 4, the protection frame 21 is fixed in the tray 2, and a passage communicating with the outside is formed between the protection frame 21 and the tray 2.

Specifically, a channel communicating with the outside is formed between the protection frame 21 and the tray 2, and the channel is used for smoke evacuation and pressure relief. For example, the safety of the second cell module 12 is poor, and the second cell module 12 is provided in the protection frame 21. When thermal runaway phenomenon appears in second electric core module 12, can be through the flue gas discharge with second electric core module 12 production with the passageway of external intercommunication to carry out the pressure release to second electric core module 12. On one hand, a user can find that the second battery cell module 12 in the battery pack has safety problems in time; on the other hand, when second electric core module 12 takes place the thermal runaway, avoided second electric core module 12 to produce the safety risk to first electric core module 11 or battery package.

In one embodiment, referring to fig. 2 and 4, the protection frame 21 includes a substrate 211, the substrate 211 having a hollow structure forming a first channel 2111; the tray 2 is formed with a second passage;

the protective frame 21 is fixed in the tray 2, the first passage 2111 and the second passage forming a passage.

Specifically, the protective frame 21 includes a base 211, and the base 211 has a hollow structure, wherein the hollow structure constitutes the first passage 2111. For example, when the second cell module 12 is mounted in the second accommodation region, a part of the second cell module 12 is disposed in the first passage 2111.

In one embodiment, the protective frame 21 is disposed on the tray 2, and both ends of the base 211 of the protective frame 21 abut on the side walls of the tray 2, respectively. For example, as shown in fig. 2 and 4, the base 211 extends in the first direction of the tray 2, and the ends of the base 211 abut against the two side walls that are disposed opposite to each other. Wherein the first direction is a width direction of the tray.

The base 211 is provided in the width direction of the tray 2 in this application. In the case where the base 211 is provided on the tray 2, a first passage 2111 formed in the base 211 communicates with a second passage (not shown) formed in the tray 2, thereby forming a passage for smoke evacuation and pressure relief. For example, the second channel is formed on a side wall of the tray 2.

In particular, the first channel 2111 has two oppositely disposed ports, one of which communicates with the second channel on one sidewall and the other of which communicates with the second channel on the other sidewall. When thermal runaway phenomenon appears in second electric core module 12, the passageway of the pressure release of discharging fume discharges fume through both sides, can get rid of the flue gas and the heat that second electric core module 12 produced fast.

In one embodiment, referring to fig. 2 to fig. 5, the second cell module 12 is formed by connecting a plurality of second cells, and the second cells are cylindrical batteries or soft-package batteries.

Specifically, the second battery cell module 12 is connected in series or in parallel or in a combination of series and parallel through the second battery cell. The second battery cell can be a cylindrical battery or a soft package battery. For example, the second cell is a ternary lithium cylindrical cell (including a battery steel shell), or the second cell is a ternary lithium soft-package cell.

In one embodiment, referring to fig. 2 to 3, the second cell module 12 is a cylindrical battery, and the protection frame 21 includes a fixing cover 212 and a fixing base 213.

Along the first direction of the fixing cover 212, a plurality of first positioning holes 2121 are formed on the fixing cover 212. For example, the fixing cover 212 has an elongated structure, and the first direction of the fixing cover 212 is the length direction of the fixing cover 212.

Along the first direction of the fixing base 213, the fixing base 213 has a plurality of second positioning holes 2131 corresponding to the first positioning holes 2121. For example, the fixing base 213 has a strip structure, and the first direction of the fixing base 213 is the length direction of the fixing base 213.

Each of the cylindrical batteries penetrates the first positioning hole 2121 and the second positioning hole 2131, respectively, and the cylindrical batteries mounted with the fixing cover 212 and the fixing base 213 are disposed in the second receiving area.

Specifically, the fixing cover 212 and the fixing base 213 further improve the mounting stability of the second cell module 12 in this embodiment.

Specifically, the fixing base 213 fixes the bottom of the cylindrical battery; the fixing cap 212 fixes the top of the cylindrical battery; a plurality of cylindrical batteries are placed in the second positioning holes 2131 of the fixing base 213, and then the cylindrical batteries are positioned and installed on the fixing cover 212 according to the setting positions of the first positioning holes 2121; the cylindrical battery mounted with the fixing cover 212 and the fixing base 213 is finally disposed in the second accommodation area. For example, the length and width dimensions of the fixing cover 212 and the length and width dimensions of the second receiving area are matched with each other, and the length and width dimensions of the fixing base 213 and the length and width dimensions of the second receiving area are matched with each other, so that the installation interference phenomenon is avoided.

In one embodiment, as shown in fig. 2 to 3, the cylindrical battery mounted on the fixing cover 212 and the fixing base 213 is fixed in the second receiving region by the first adhesive 31.

Specifically, the first adhesive 31 includes, for example, a double-sided adhesive tape and a liquid glue. For example, the first adhesive 31 includes a structural adhesive sheet, and two sides of the structural adhesive sheet are both provided with double-sided adhesive, wherein one end of the structural adhesive sheet is connected with the fixed base 213, and the other end is connected with the substrate 211 of the protection frame 21; and then whole second battery module 12 utilizes first locating hole 2121 of fixed lid 212 to fill into second battery module 12 in the liquid glue and put into basement 211, and this embodiment has promoted the installation stability of second battery module 12.

In one embodiment, the protection frame 21 includes a frame upper cover 214, and the frame upper cover 214 has a plate-shaped structure. The frame cover 214 and the base 211 enclose a second receiving area. The frame upper cover 214 is covered on the fixed cover 212.

In one embodiment, the battery pack includes a power lead 215, and the power lead 215 is fixed in the protective frame 21 by a fastener. The power leading-out piece is connected with the output electrode of the battery, so that the length of the electric leading-out part is reduced, and the production cost is reduced.

In one embodiment, referring to fig. 4 to 5, in the case that the second cell module 12 is a pouch battery, the protection frame 21 includes a fixing cover 212.

The second cell module 12 is disposed in the second accommodation region, the fixing cover 212 is fixed to the top of the second cell module 12 by the second adhesive 32, and the bottom of the second cell module 12 is connected to the protection frame 21 by the third adhesive 33.

The laminate polymer battery comprises a shell of the laminate polymer battery and a laminate polymer battery core, wherein the laminate polymer battery core is arranged in the shell of the laminate polymer battery. The soft package battery is provided with an electric connecting sheet, wherein the electric connecting sheet comprises a positive electrode electric connecting sheet and a negative electrode electric connecting sheet. The positive electrode electric connection sheet is connected with the first electric leading-out part, and the negative electrode electric connection sheet is connected with the second electric leading-out part.

Specifically, a plurality of laminate polymer batteries are connected to form second battery cell module 12. And the bottom of the second mounted battery cell module 12 is connected with the bottom of the substrate 211 through a third adhesive 33. The third adhesive 33 is an adhesive sheet or an adhesive sheet. And the top of the second cell module 12 is connected with the fixing cover 212 through the second adhesive 32. Wherein the second adhesive 32 is an adhesive sheet or an adhesive sheet. This embodiment has promoted the installation stability of second electricity core module 12.

In one embodiment, the protection frame 21 includes a frame upper cover 214, and the frame upper cover 214 has a plate-shaped structure. The frame cover 214 and the base 211 enclose a second receiving area. The frame upper cover 214 is covered on the fixed cover 212.

In one embodiment, referring to fig. 2 to 5, the second cell module 12 has a second hydraulic valve thereon, and/or the first cell module 11 has a first pressure relief valve thereon;

the second battery cell module 12 is arranged in the protective frame 21, and the second pressure release valve is arranged towards the bottom of the protective frame 21; first electric core module 11 sets up in tray 2, and first relief valve sets up towards tray 2's bottom.

Specifically, be provided with first hydrovalve on first electric core module 11, be provided with the second relief valve on second electric core module 12, promoted first electric core module 11 and second electric core module 12's safety in utilization.

For example, the battery pack is a power battery pack and is applied to an automobile. For example, the battery pack is disposed under a seat of an automobile. In order to further ensure user safety, in this embodiment, the second cell module 12 is disposed in the protection frame 21, and the second pressure release valve of the second cell module 12 is disposed toward the bottom of the protection frame 21, so that the second cell module 12 is prevented from being released toward the seat of the vehicle, and the use safety of the vehicle is ensured. Simultaneously first electric core module 11 sets up in tray 2, and first relief valve of first electric core module 11 sets up towards the bottom of tray 2, has avoided first electric core module 11 towards car saddle pressure release, has ensured the safety in utilization of car.

In one embodiment, referring to fig. 2 to 5, the second cell module 12 is provided with a first electrical lead-out portion 121 and a second electrical lead-out portion 122;

one end of the first electrical lead-out part 121 is electrically connected to the second cell module 12, and the other end of the first electrical lead-out part 121 is electrically connected to the first cell module 11;

one end of the second electrical lead-out portion 122 is electrically connected to the second cell module 12, and the other end of the second electrical lead-out portion 122 is electrically connected to the second cell module 12.

Specifically, the second cell module 12 is provided with a first electrical lead-out portion 121 and a second electrical lead-out portion 122. Wherein the first electrical lead-out portion 121 is a positive electrode tab lead-out portion. The second electrical lead-out portion 122 is a negative electrode tab lead-out portion.

For example, the second cell module 12 includes a plurality of second cells, and the plurality of second cells are electrically connected. Each second cell includes a positive electrode and a negative electrode. Electrically connecting the housing cathode of the second cell to the second electrical lead 122 by laser welding; the positive electrode post of the second cell is electrically connected to the first electrical lead-out portion 121. The first electrical lead-out portion 121 and the second electrical lead-out portion 122 may be connected to the corresponding positive and negative electrodes of the first cell module 11 in the battery pack tray 2 by screws.

In one embodiment, the first electrical lead 121 is a metal component and the second electrical lead 122 is a metal component. For example, the first electrical lead 121 is a nickel plate, and the second electrical lead 122 is a copper plate.

In one embodiment, the protective frame 21 is a metal component. For example, the protection frame 21 is made of an aluminum alloy material, so that the overall weight of the battery pack is reduced.

According to a second aspect of embodiments of the present application, a vehicle is provided. The vehicle includes the battery pack of the first aspect. For example, the vehicle can be a pure electric vehicle or a hybrid vehicle such as a car, a passenger car and a truck, and the application improves the use safety of the vehicle.

In the above embodiments, the differences between the embodiments are described in emphasis, and different optimization features between the embodiments can be combined to form a better embodiment as long as the differences are not contradictory, and further description is omitted here in consideration of brevity of the text.

Although some specific embodiments of the present application have been described in detail by way of illustration, it should be understood by those skilled in the art that the above illustration is only for purposes of illustration and is not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the application is defined by the appended claims.

Claims (12)

1. A battery pack, comprising: the electric core group (1) is arranged in the tray (2);

at least one protective frame (21) is arranged in the tray (2), the tray (2) is divided by the protective frame (21) to form at least one first accommodating area, and a second accommodating area is arranged in the protective frame (21);

the battery pack (1) comprises at least one first battery cell module (11) and at least one second battery cell module (12), the first battery cell module (11) is placed in the first accommodation area, the second battery cell module (12) is placed in the second accommodation area, and the first battery cell module (11) and the second battery cell module (12) are electrically connected;

the safety of the first battery cell module (11) is greater than the safety of the second battery cell module (12).

2. The battery pack according to claim 1, wherein the first cell module (11) is at least one of a lithium iron phosphate cell module and a lithium manganate cell module;

the second battery cell module (12) is at least one of a ternary lithium battery cell module and a polymer lithium battery cell module.

3. The battery pack according to claim 1, wherein the protective frame (21) is fixed in the tray (2), and a passage communicating with the outside is formed between the protective frame (21) and the tray (2).

4. The battery pack according to claim 3, wherein the protection frame (21) comprises a base (211), the base (211) having a hollow structure forming a first channel (2111); the tray (2) is formed with a second channel;

the protective frame (21) is fixed in the tray (2), the first channel (2111) and the second channel forming the channel.

5. The battery pack according to claim 1, wherein the second cell module (12) is composed of a plurality of second cell connections; the second battery cell is a cylindrical battery or a soft package battery.

6. The battery pack of claim 5, wherein the second cell is a cylindrical battery, and the protective frame (21) comprises a fixing cover (212) and a fixing base (213);

a plurality of first positioning holes (2121) are formed in the fixing cover (212) along a first direction of the fixing cover (212);

a plurality of second positioning holes (2131) corresponding to the first positioning holes (2121) are formed in the fixing base (213) along a first direction of the fixing base (213);

each cylindrical battery penetrates through the first positioning hole (2121) and the second positioning hole (2131), and the cylindrical batteries provided with the fixing covers (212) and the fixing bases (213) are arranged in the second accommodating areas.

7. The battery pack according to claim 6, wherein the cylindrical batteries mounted on the fixing cover (212) and the fixing base (213) are fixed in the second receiving region by a first adhesive (31).

8. The battery pack according to claim 5, wherein the second cell is a pouch battery, and the protective frame (21) comprises a fixing cover (212);

the second battery cell module (12) is arranged in the second accommodating area, the fixing cover (212) is fixed to the top of the second battery cell module (12) through a second adhesive (32), and the bottom of the second battery cell module (12) is connected with the protection frame (21) through a third adhesive (33).

9. The battery pack according to claim 1, wherein the second cell module (12) has a second pressure relief valve thereon, and/or the first cell module (11) has a first pressure relief valve thereon;

the second battery cell module (12) is arranged in the protective frame (21), and the second pressure release valve is arranged towards the bottom of the protective frame (21); the first battery cell module (11) is arranged in the tray (2), and the first pressure release valve faces to the bottom of the tray (2).

10. The battery pack according to claim 1, wherein the second cell module (12) is provided with a first electrical lead-out (121) and a second electrical lead-out (122);

one end of the first electrical lead-out part (121) is electrically connected with the second battery cell module (12), and the other end of the first electrical lead-out part (121) is electrically connected with the first battery cell module (11);

one end of the second electric leading-out part (122) is electrically connected with the second battery cell module (12), and the other end of the second electric leading-out part (122) is electrically connected with the second battery cell module (12).

11. The battery pack according to claim 1, wherein the protection frame (21) is a metal member.

12. A vehicle, characterized in that the vehicle comprises a battery pack according to any one of claims 1-11.

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