KR20170054881A - Battery module and battery pack including the same - Google Patents

Abstract

The present invention relates to a battery module which includes: a module body including a power terminal; a module case including a hook hole formed in a predetermined fixing position, and combined with the module body to surround at least one part of the module body; a bus bar electrically connected with the power terminal; and a fixing clip including a clip body including a combination groove, into which the bus bar is inserted to be fixed, and a hanging hook hung on the hook hole to be fixed, and fixing the bus bar to the fixing position. Thus, as the bus bar, electrically connecting battery modules, is inserted into the fixing clip fixed to the module case, the present invention is capable of preventing the separation of the bus bar from the module case, caused by an external vibration or impact, by providing high fixing force of the module case to the bus bar, thereby stably maintaining the electrical connection between the battery modules.

Description

[0001] The present invention relates to a battery module and a battery pack including the battery module,

The present invention relates to a battery module and a battery pack including the battery module.

2. Description of the Related Art In recent years, demand for portable electronic products such as notebook computers, video cameras, and portable telephones has rapidly increased, and electric vehicles, storage batteries for energy storage, robots, and satellites have been developed in earnest. Are being studied actively.

The secondary rechargeable batteries are nickel-cadmium batteries, nickel-hydrogen batteries, nickel-zinc batteries, and lithium secondary batteries. Among them, lithium secondary batteries have almost no memory effect compared to nickel- It is very popular because of its low self-discharge rate and high energy density.

These lithium secondary batteries mainly use a lithium-based oxide and a carbonaceous material as a cathode active material and an anode active material, respectively. The lithium secondary battery includes an electrode assembly in which a positive electrode plate and a negative electrode plate each coated with such a positive electrode active material and a negative electrode active material are disposed with a separator interposed therebetween, and an outer casing, that is, a battery case, for sealingly storing the electrode assembly together with the electrolyte solution.

Generally, a lithium secondary battery can be classified into a can type secondary battery in which an electrode assembly is embedded in a metal can, and a pouch type secondary battery in which an electrode assembly is embedded in a pouch of an aluminum laminate sheet, depending on the shape of the casing.

In recent years, secondary batteries are widely used not only in small-sized devices such as portable electronic devices, but also in medium to large-sized devices such as automobiles and electric power storage devices. When used in such a medium to large-sized apparatus, a large number of secondary batteries are electrically connected to increase capacity and output. In particular, pouch-type secondary batteries are widely used because they are easy to store and stack.

The battery module refers to a device in which a plurality of secondary batteries are connected in series or in parallel so as to increase capacity and output. Also, a battery pack refers to a device in which a plurality of battery modules are connected in series or in parallel so as to further increase capacity and output.

In general, a battery pack is configured such that a power terminal of a certain battery module is electrically connected to a power terminal of another battery module by a bus bar, and the bus bar is fixed to a module case of each battery module do. However, since such a tape has a relatively weak fixing force, there is a possibility that the bus bar is separated from the module case when vibration or shock is applied from the outside. Therefore, when a vibration or an impact is applied from the outside, the conventional battery pack has a problem that the bus bar is separated from the module case and deformed and damaged, thereby interrupting the electrical connection between the battery modules.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made to solve the above problems occurring in the prior art, and it is an object of the present invention to provide a battery module and a battery pack including the battery module, which are improved in structure to protect a bus bar electrically connecting battery modules from external vibration or shock .

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a module main body having a power supply terminal. A module case having a hook hole formed at a predetermined fixed position and coupled with the module body so as to surround at least a part of the module body; A bus bar electrically connected to a power terminal; And a fixing clip having a clip body having a coupling groove into which a bus bar is inserted and fitted, and a locking hook which is hooked and fixed to the hook hole, the fixing clip fixing the bus bar to the fixing position.

Preferably, the clip body further has at least one latching jaw extending from the coupling groove such that the bus bar engaged with the coupling groove is engaged.

Preferably, the hook hole has a circular first hook hole having a predetermined diameter, and the hook has a conical first hook head which is inserted and fixed in the first hook hole and fixed, And a first connecting hook having a first connecting portion for connecting the main body.

Preferably, the hook hole has a linear second hook hole having a predetermined width and a length, the hook has a straight second hook head which is inserted and fixed in the second hook hole and fixed, And a second hook portion having a second connecting portion for connecting the clip main body.

Preferably, a plurality of second hook holes are provided symmetrically with respect to the first hook hole, and a plurality of second hook holes are provided so as to be arranged at positions corresponding to the second hook holes .

Preferably, the fixing member further includes at least one resilient piece interposed between the clip body and the module case to elastically support the clip body.

Preferably, the elastic piece is characterized in that one end is connected to the clip body.

Preferably, the elastic piece is provided such that the other end opposite to the one end is in a free-end state, and the elastic piece is inclined so that the other end faces the module case.

Preferably, the resilient piece is provided such that the other end thereof opposite to the one end is connected to the retaining hook, and the resilient piece has a bent portion bent between the one end and the other end so as to be bent toward the module case.

According to another aspect of the present invention, there is provided a battery pack including a battery module according to an aspect of the present invention.

According to another aspect of the present invention, there is provided a battery pack including the battery pack according to another aspect of the present invention.

The battery module and the battery pack including the battery module according to the present invention are assembled by fixing a bus bar electrically connecting the battery modules to a fixing clip fixed to the module case to provide a high fixing force to the bus bar, The electrical connection between the battery modules can be stably maintained by preventing the bus bar from being separated from the module case by the applied vibration or impact.

1 schematically shows a battery pack according to a preferred embodiment of the present invention.
Fig. 2 is a partially enlarged view of region A in Fig. 1; Fig.
Figure 3 is a perspective view of the securing clip shown in Figure 1;
FIG. 4 is an enlarged sectional view of the battery module shown in FIG. 1 taken along the line I-I '; FIG.
5 is a front view of a retaining clip according to another aspect;
Fig. 6 is a view showing a state in which the fixing clip shown in Fig. 5 is fixed to the module case; Fig.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms and the inventor may appropriately define the concept of the term in order to best describe its invention It should be construed as meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

In the drawings, the size of each element or a specific part constituting the element is exaggerated, omitted or schematically shown for convenience and clarity of description. Therefore, the size of each component does not entirely reflect the actual size. In the following description, it is to be understood that the detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is a view schematically showing a battery pack according to a preferred embodiment of the present invention.

Referring to FIG. 1, a battery pack 1 according to a preferred embodiment of the present invention includes a plurality of battery modules 2 electrically connected to each other. To this end, each battery module 2 includes a module body 10 having a power supply terminal 16; A module case (20) having a hook hole (22) formed at a predetermined fixed position and coupled with the module body (10) so as to surround at least a part of the module body (10); A bus bar 30 electrically connected to the power terminal 16; And a locking hook 42 which is engaged with the hook hole 22 of the module main body 10 and which is fixed to the clip main body 41. The clip main body 41 has an engagement groove 41a into which the bus bar 30 is inserted, And a fixing clip 40 for fixing the bus bar 30 to a predetermined fixed position of the module case 20. Such a battery pack 1 may be installed and used in an automobile other apparatus.

First, the module body 10 is a member for electrically connecting a plurality of secondary batteries 12.

The module main body 10 has a plurality of cartridges 14 each accommodating a secondary battery 12 and connects the secondary batteries 12 in series or in parallel. 1, the module main body 10 includes a pair of power terminals 16 electrically connected to the secondary batteries 12 and having polarities different from each other.

2 is a partially enlarged view of the area A in Fig.

Next, the module case 20 is a member for protecting the module main body 10 from the outside.

The module case 20 is mounted on the outside of the module body 10 so that the power terminals 16 of the module body 10 are exposed to the outside of the battery module 2, as shown in Fig. The module case 20 includes at least one hook hole 22 formed at a predetermined fixed position.

The hook hole 22 is preferably formed on the upper surface of the module case 20 as shown in FIG. 1, but is not limited thereto. 2, the hook hole 22 has a circular first hook hole 23 having a predetermined diameter and a second hook hole 24 having a predetermined width and length, . Further, the pair of second hook holes 24 may be symmetrically arranged with the first hook hole 23 as a center. However, the present invention is not limited thereto, and at least one of the second hook holes 24 may be disposed symmetrically with the first hook hole 23 therebetween.

Next, the bus bar 30 is a member for electrically connecting the battery modules 2.

1, one end of the bus bar 30 is connected to the power source terminal 16 of one battery module 2 and the other end of the bus bar 30 is connected to the power source terminal 16 of the other battery module 2 ' So that the battery modules 2 are electrically connected. The bus bar 30 is fixed to a predetermined fixed position of the battery module 2 by the fixing clip 40.

FIG. 3 is a perspective view of the fixing clip shown in FIG. 1, and FIG. 4 is a sectional view taken along the line I-I 'of the battery module shown in FIG.

The fixing clip 40 is a member for fixing the bus bar 30 to the battery module 2.

The fixing clip 40 is provided in the same number as the hook hole 22 so as to be fixedly mounted on each hook hole 22. [ 3, the fixing clip 40 includes a clip body 41 to be coupled with the bus bar 30, a hooking hook 42 to be hooked and fixed to the hook hole 22, (43) for elastically supporting the elastic member (41).

3, the clip body 41 is formed so that the coupling groove 41a into which the bus bar 30 is inserted and fitted is engaged with the bus bar 30 fitted into the coupling groove 41a And an engagement protrusion 41b extending from the engagement groove 41a.

The coupling groove 41a has a cross-sectional shape corresponding to that of the bus bar 30 so that the bus bar 30 can be inserted. As shown in FIG. 4, the engaging groove 41a preferably has a cross-sectional shape of 'D' shape with an open top surface, but is not limited thereto. As shown in Fig. 4, the bus bar 30 can be inserted into and engaged with the coupling groove 41a in the longitudinal direction.

As shown in Fig. 4, the engaging jaw 41b is formed to protrude from the upper end of the engaging groove 41a toward the opened upper surface of the engaging groove 41a. It is preferable that each of the engaging protrusions 41b is formed on each of the upper and lower ends of the engaging groove 41a, but the present invention is not limited thereto. 4, the upper surface of the bus bar 30 fitted to the coupling groove 41a is hooked on the latching jaw 41b, and the latching jaw 41b is engaged with the upper surface of the bus bar 30, And can be prevented from being detached from the engaging groove 41a through the opened upper surface of the groove 41a.

As shown in Fig. 3, the hooking hook 42 includes a first hooking hook 44 which is inserted into the first hooking hole 23 and is engaged and fixed, and a second hooking hole 44 which is inserted into the second hooking hole 24 And a second hooking hook 45 which is fixed.

4, the first hooking hook 44 includes a conical first hook head 44a which is inserted and fixed in the first hook hole 23 to be fixed thereto, a first hook head 44a, And a first connecting portion 44b for connecting the clip main body 41 to each other.

The first hook head 44a has a conical shape and is elastically deformable so as to extend and retract in the radial direction. 4, the first hook head 44a is reduced radially in the course of passing through the first hook hole 23, and then passes through the first hook hole 23 again to be radially inward So that the first hook hole 23 is engaged and fixed. The first hook head 44a can be fixed to a predetermined fixed position of the module case 20 with the bus bar 30 coupled to the securing clip 40 and the securing clip 40. [

The first connection portion 44b is provided so as to connect the lower surface of the clip body 41 and the central portion of the first hook head 44a, as shown in Fig. The first connecting portion 44b has a bar shape having a relatively smaller diameter than the first hook hole 23 so as to pass through the first hook hole 23 along the first hook head 44a.

3, the second hooking hook 45 includes a linear second hook head 45a which is inserted and fixed in the second hook hole 24 and is fixed to the second hook head 45a, And a second connecting portion 45b for connecting the clip main body 41 to each other. The second hooking hook 45 is symmetrically formed with a pair of hooking hooks 44 interposed therebetween so as to be disposed at a position corresponding to the second hooking hole 24 . However, the present invention is not limited thereto and at least one second hooking hook 45 may be disposed symmetrically with the first hooking hook 44 interposed therebetween so as to correspond to the second hooking hole 24.

As shown in Fig. 3, the second hook head 45a has a linear shape elongated in the longitudinal direction of the fixing clip 40 so as to correspond to the second hook hole 24 having a linear shape, Lt; / RTI > 4, the second hook head 45a is elastically deformed in the process of passing through the second hook hole 24, and is restored to the original state when it passes through the second hook hole 24. As a result, 2 hook holes 24 and is fixed. Since the first hook head 44a described above has a conical shape, the fixing clip 40 may be rotated about the first hook head 44a. Since the second hook head 45a having a straight line shape can be hooked to the second hook hole 24 in the rotating direction of the fixing clip 40, the rotation of the fixing clip 40 can be prevented.

The second connecting portion 45b is provided so as to connect the lower surface of the clip body 41 and the upper end of the second hook head 45a, as shown in Fig. The second connecting portion 45b is preferably of a plate shape elongated in the longitudinal direction of the fixing clip 40, but is not limited thereto.

4, one end 43a is connected to the lower surface of the clip body 41 and the other end 43b is connected to the second connecting portion 45b of the second hook 45 And is elastically deformable. The pair of elastic pieces 43 may be symmetrically formed with the first hooking hook 44 as a center. However, the present invention is not limited thereto, and at least one of the elastic pieces 43 may be disposed symmetrically with respect to the first hooking hook 44 so as to correspond to the second hooking hook 45.

The resilient piece 43 has a structure in which an intermediate portion between one end 43a and the other end 43b is bent toward the module case 20 as shown in FIG. 4, the elastic piece 43 is interposed between the clip main body 41 and the module case 20 such that the bent portion 43c is in close contact with the upper surface of the module case 20. As shown in Fig. The elastic piece 43 is elastically deformed when vibration or impact is applied to the battery module 2 from the outside so that the fixing clip 40 is elastically deformed so as to minimize vibration or impact transmitted to the fixing clip 40. [ can do.

The bus bar 30 electrically connecting the battery modules 2 is fitted and fixed to the fixing clip 40 fixed to the module case 20, It is possible to provide a high fixing force of the module case 20 with respect to the case 20. Therefore, the battery pack 1 can prevent the bus bar 30 from being separated from the module case 20 by external vibration or shock, so that the electrical connection between the battery modules 2 can be prevented It can be stably maintained.

FIG. 5 is a front view of a fixing clip according to another aspect of the present invention, and FIG. 6 is a view showing an aspect in which the fixing clip shown in FIG. 5 is fixed to a module case.

The fixing clip 40 described above includes elastic pieces 43 interposed between the clip body 41 and the module case 20 to elastically support the fixing clip 40. When the battery pack 1 is manufactured, a clearance is generated between the elastic pieces 43 and the module case 20 so that the elastic pieces 43 smoothly move the clip body 41 There is a fear that it will not be able to do.

5, the battery pack 1 includes a fixing clip 40 having an elastic piece 46 having an improved structure as compared with the elastic piece 43 of the fixing clip 40 described above, (40 '). The elastic piece 46 of the fixing clip 40 'has one end 46a connected to the lower surface of the clip body 41 and the other end 46b provided in the free end state. The elastic piece 46 is formed so that the other end 43b is inclined so as to face the lower side of the clip body 41, that is, toward the upper surface side of the module case 20.

6, when the fixing clip 40 'is mounted on the module case 20, the elastic piece 46 is elastically deformed by being brought into close contact with the upper surface of the module case 20, Elastic support. Since the other end 43b of the resilient piece 46 is provided in a free-end state, the other end 43b of the resilient piece 46 is in contact with the resilient piece 43 of the aforementioned fixing clip 40 connected to the second hook 45 It is possible to provide a relatively wide range of elastic deformation. Therefore, by using such a fixing clip 40, the resilient piece 46 can be inclined toward the module case 20 and can be easily brought into close contact with the module case 20, The clip body 41 can be easily elastically supported through the elastic piece 46 even if a tolerance is generated.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not to be limited to the details thereof and that various changes and modifications will be apparent to those skilled in the art. And various modifications and variations are possible within the scope of the appended claims.

1: Battery pack
2: Battery module
10: Module body
12: Secondary battery
14: Cartridge
16: Power supply terminal
20: Module case
22: Hook hole
23: first hook hole
24: second hook hole
30: Bus bar
40, 40 ': Fixing clip
41: Clip body
41a: coupling groove
41b:
42: Retaining hook
43, 46:
44: first hooking hook
45: second hooking hook
46:

Claims (11)

A module main body having a power supply terminal;
A module case having a hook hole formed at a predetermined fixed position and coupled with the module body so as to surround at least a part of the module body;
A bus bar electrically connected to the power terminal; And
And a fixing clip for holding the bus bar in the fixing position, the fixing clip including a clip body having a coupling groove into which the bus bar is inserted and fitted, and a latching hook which is hooked and fixed to the hook hole, module. The method according to claim 1,
Wherein the clip body further comprises at least one latching jaw extending from the coupling groove such that the bus bar fitted to the coupling groove is engaged. 3. The method of claim 2,
Wherein the hook hole has a circular first hook hole having a predetermined diameter,
The hooking hook may include a first hooking head having a conical first hook head which is inserted and fixed in the first hook hole and is fixed and a first connecting portion connecting the first hook head and the clip body Features a battery module. The method of claim 3,
The hook hole has a linear second hook hole having a predetermined width and length,
The hook has a second hook head having a straight second hook head inserted and fixed in the second hook hole and a second hook portion having a second connecting portion connecting the second hook head and the clip body Features a battery module. 5. The method of claim 4,
A plurality of second hook holes are provided symmetrically with respect to the first hook hole,
And a plurality of second hooking hooks are provided at positions corresponding to the second hooking holes. The method according to claim 1,
Wherein:
Further comprising at least one resilient piece interposed between the clip body and the module case to elastically support the clip body. The method according to claim 6,
Wherein one end of the elastic piece is connected to the clip body. 8. The method of claim 7,
Wherein the elastic piece is provided so that the other end opposite to the one end is in a free end state,
Wherein the elastic piece is inclined so that the other end faces the module case. 8. The method of claim 7,
Wherein the elastic piece is provided so that the other end thereof opposite to the one end is connected to the hook,
Wherein the elastic piece has a bent portion bent between the one end and the other end and facing the module case. A battery pack comprising the battery module according to any one of claims 1 to 9. An automobile comprising the battery pack according to claim 10.

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